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Патент USA US3078641

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Feb. 26, 1963
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c. H. MAYER, JR., ETAL
CAN FILLING MACHINE
Filed Aug. 2, 1960
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3,078,6305
Feb. 26, 1963
c. H. MAYER, JR., ETAL
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3,078,630
CAN FILLING MACHINE
Filed Aug. 2, 1960
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Feb. 26, 1963
c. H. MAYER, JR.. ETAL
3,078,630
CAN FILLING MACHINE
Filed Aug, 2, 1960
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Feb. 26, 1963
c. H. MAYER, JR., ETAL
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CAN FILLING MACHINE
Filed Aug. 2, 1960
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Feb. 26,' 1963
C. H. MAYER, JR., ETAL
3,078,630
CAN FILLING MACHINE
'Filed Aug. 2, 1960
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United States Patent Orifice
1
3,078,630
Patented Feb. 26, 1953
2
which maintains the cans centered on the center line of the
3,078,630
machine for the successive operations regardless of the
Carl H. Mayer, Jr., Wilmette, and Donald W. Fergusson,
Evanston, Ill., assigiiors to Rust-Gianni Corporation,
stations are simultaneously adjustable in accordance with
CAN FILLING MACHÍNE
Evanston, Ill., a corporation of Iilinois
Filed Aug. 2, 196il, Ser. No. 46,978
20 Claims. (Cl. 531-55)
diameter of the can and in which the mechanisms at the
can height.
Consequently, it is an object to provide a
filling machine in which there is little “down” timev be
tween successive runs of different color or using a dif
ferent size can.
The present invention relates to can filling machines
lt is an object of the present invention in one of its
and more particularly to a machine for filling “press top” 10 aspects to provide, in a filling machine of the present type,
cans of paint and similar liquids.
a lid dispenser which is capable of being used with a
While the art relating to dispensing of liquids is highly
corresponding range of can sizes and which utilizes the
developed, it is common practice in paint factories to fill
same means for storing, dropping, embossing and guiding
paint cans using an manually operated valve under the
lids over the entire range. It is a more detailed object
control of an operator. This practice has persisted since 15 to provide a lid dispenser in which all of the various ad
none of the can filling devices available to the industry
justments are brought about by turning a single control
has appeared to satisfy all of the requirements.
in one direction or the other.
>It is an object of the present invention to provide a
It is another detailed object to provide a machine hav
ing novel means for centering cans at the filling station
filling machine which is capable of filling paint cans
automatically on a high production basis. It is another
object to provide an automatic filling machine which is
filling station capable of operating reliably over a wide
safe and positive in operation and in which there is no
range of can size.
and for detecting the presence or absence of a can at the
Thus the device not only precludes
accidental dumping of a charge of paint onto the machine
cally, it is an object to provide a conveyor type filling
or onto the floor but insures that no drops of paint will
machine having novel provision for insuring that the 25 be lodged in the upper rim of the can, even though a
conveyor is stopped and that a can is centered in the
wide discharge nozzle is used.
filling position prior to discharge of the paint from the
it is another object of the present invention to provide
filling valve so that rapid filling is possible without splatter
a fiiling machine having filling, lid applying, and capping
or without getting paint in the rim of the can.
stations and in which a novel conveying arrangement is
It is another object of the present invention to provide 30 utilized for intermittently advancing the cans from one
a filling machine having means for positively identifying
station to the next. It is still another object to provide
the contents of each can incident to applying the lid and
a filling machine in which the arrival of cans at a “down
possibility of accidental spillage of paint. More specifi
immediately following the filling operation. In this con
stream” point, preferably the capping station, is employed
nection it is an object to provide a filling machine in
to temporarily turn off the conveyor and to initiate op
eration at the three stations. It is yet another object to
which the can lids are embossed individually at the time
of use and in which the possibility of improper identifica~
tion, which sometimes occurs where pre-embossed lids are
used, is entirely eliminated. lt is a further object to pro
vide a filling machine which enables maximum economy
provide a filling machine capable of handling cans of dif
ferent diameter and in which novel provision is made for
changing the station-to-station spacing in accordance with
variations in the diameter of the cans being processed,
in the use of lids with no lids being left over at the end 40 with the capping station serving as the point of reference.
of the run. Thus the arrangement is especially suited to
It is a more specific object to provide a filling machine in
the filling of paint cans where the total amount of liquid
which arrival of a can at the capping station initiates de
to be canned is not subjected to precise determination and
tecting and centering means at the filling station and in
where it is impossible to make an accurate prediction of
which the filling is contingent upon a can being present
the number of lids required for a given run.
4.5 at the desired centered position below the filling head. It
lt is still another object of the present invention to pro
is another object to provide a can filling machine in which
vide a filling machine which is flexible in use and which
the filling is accurately timed to provide correct measure
may be employed to serve any one of a plurality of fixed
but in which the timing means is not actuated until it is
overhead vats having paints of different color. In this
verified automatically that a can is in the exact position
connection it is an object to provide a filling machine 50 to receive the paint or other liquid.
which is particularly well adapted for po-rtable use, pref
lt is a more specific object to provide a can filling ma-erably wheel or caster mounted, and which can simply
chine having a switch at the capping station for sensing
bepushed into position under a selected vat and adjoin
arrival of a can to terminate movement of the conveyor
ing a selected conveyor for removal of the filled cans. In
and to initiate timed filling means at the filling station
this way a single automatic filling machine may be em 55 but in which auxiliary means are provided for initiating
ployed on a constant basis to service a large number of
the subsequent movement of the conveyor when the can
vats in succession so that a limited number of machines
is filled, with control being restored to the sensing switch
of the present type, typically from three to six, are ca
once a given can moves out of the capping station.
pable of handling the entire output of even the largest
It is a still further object of the invention to provide an
paint manufacturing plant. It is a related object to pro 60 automatic can filling machine having the advantageous
vide a filling machine which permits the rapid change in
features of construction and operation mentioned above
color of the paint being handled without the necessity for
but in which the control arrangement is, nevertheless,cleaning or fiushing, simply by substituting a different
simple and straightforward so that the device operates
strainer and filling head assembly, which takes but a few
reliably without care or maintenance over long periods
minutes time.
of time.
it is a further object to provide an automatic filling
Other objects and advantages of the invention will be
machine which is capable of handling cans having a wide
range of size and liquid capacity, for example, a range
of one-quarter pint to a gallon or more, with provision
come apparent upon reading the attached detailed de
scription and upon reference to the drawings in which:
FIGURE l is a side elevation of a can filling machine
constructed in accordance with the present invention.
70
is an object of the invention to provide a filling machine
FIG. 2 shows a typical can filled and with the lid em
having stations for filling, for dropping of a lid upon an
bossed by the machine of FIG. l.
for quick and simple adjustment between the sizes. It
open can, and for pressing of the lid into place arid
FIG. 3 is a fragmentary section of the can sensing.
3,078,630
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3
switch in the device of FIG. 1 taken along the line 3-3
in that figure.
FIG. 4 shows the lid dropping and embossing portion
of the device taken along the line 4~4 in FIG. 1.
FIG. 4a is a fragmentary section looking along the line
4a-4cz in FIG. 4 and showing the embosser driving
4
supporting plates acts to keep the edges clear of paint, dirt,
or other foreign matter.
For the purpose of longitudinally driving the conveyor
chains 41, 42 a conveyor drive motor 50 is provided
which is connected to a speed reducing gear box 51 by
means of a driving belt 52. The output of the gear box
51 is transmitted to the conveyor by a driving chain 53.
mechanism.
FIG. 5 is a fragmentary stop motion view of the lid
releasing means showing a lid in supported position ready
to be dropped.
FIG. 6 is aview similar to FIG. 5 but showing release
while permitting the motor 50 to run continuously, a
of the lowermost lid onto the guiding means.
FIG. 7 is a fragmentary section taken through the lid
promptly when the clutch is deenergized, a brake 56 is
For the purpose of starting and stopping the conveyor
clutch 55 is interposed in the drive train (see FIG.v _11)
under the control of an electrical control circuit to be
described, and for insuring that the conveyor stops
used. Both the clutch and brake are per se well known
releasing members looking along the line '7-7 in FIG. 4.
FIG. 8 is a fragmentary section showing engagement 15 to those skilled in the art. In order to feed empty cans
of a lid with an awaiting can.
54 to the conveyor in close succession a feed table 57 is
used having a right angle drive connection 58 and a drive
shaft 59 driven by the same gear box 51 which powers
veying means along the line 9--9 in FIG. 1.
the conveyor. It will be understood that the table 57
FIG. 10 is a fragmentary plan view of the can centering
and detecting means looking along the line 10--10 in 20 rotates at a speed which is relatively higher than that of
the conveyor so that cans are constantly crowded onto
FIG. 9.
the conveyor with constant takeup of any gaps between
FIG. 11 is a schematic diagram of the electrical con
them.
trol circuit employed in practicing the present invention.
For the purpose of dropping lids one by one in order
While the invention has been described in connection
with a preferred embodiment it will be understood that we 25 to lightly position the lids on top of the cans which have
been filled by the filling head 33, a lid dropping and em
do not intend to be limited to the illustrated embodiment
bossing assembly 60 is provided which defines a lid-drop
but intend to cover the various alternative and equivalent
ping station B. The lid dropping arrangement is shown
constructions included within the spirit and scope of the
in elevation in FIG. 1 and the details are illustrated in
appended claims.
FIGS. 4_8 inclusive. The assembly includes a base 61
Referring now to the drawings, a can filling machine
having an upwardly projecting lid storage means. The
20, constructed in accordance with the invention, has a
FIG. 9 is a transverse section taken through the con
horizontal frame including longitudinal members 21, 22‘
latter is made up of a central storage rail 62 as well as
left and right hand storage rails 63, 64, respectively, form
(see FIG. 9) supported on vertical members or legs 23,
ing an inclined trough within which a plurality of lids 65
24, preferably four in number. The legs may be provided
with suitable wheels or casters (not shown) in order to 35 are stacked one above the other for gravity feeding. For
the purpose of releasing a lid from the bottom of the
enable movement of the machine bodily from one operat
stack, a release mechanism is provided having left and
ing position to another. The machine is intended to be
right hand release members 66, 67 respectively, the latter
used on an operating floor below a storage area having
being mounted for reciprocation in side or guide members
a pluraîty of vats to enable gravity discharge of paint
from one of the vats into an inlet connection 25 on the 40 68, 69 supported on the base 61.
machine, the connection being made by means of a'iiexible
hose or the like. Connected to the inlet 25 is a filling as
sembly 30 which includes a strainer 3l, a conduit 32 and a
In order to move the
release members 66, 67 backwardly and forwardly in uni
son, a pair of air actuators 71, 72 are provided controlled
by a solenoid valve 73.
Means are provided at the inner faces of the two re
leasing members 66, 67 so that only the lowermost lid is
which is left in an adjusted position depending upon the 45 released from sto-rage when the members are actuated.
When the release members are in a retracted position, the
size of the can to be ñlled and the viscosity of the paint.
lowermost lid 65a is supported upon a pair of “releasing”
Filling valve 33 is of the type having conical closure mem
ledges 75 (FIGS. 5 and 7). Formed on each of the re
ber 35 (see FIG. 9) which is operated by means of an air
leasing members 66, 67 at a level above the ledge 75 is a
actuator 36 under the control of a solenoid valve 37 (FIG.
ñlling valve or “head” 33. In the conduit is an adjustable
valve 34 for controlling the maximum, rate of flow and
11). The strainer is of the periodic back flushing type 50 second’or “retaining” ledge 76 which is offset rearwardly
from the ledge 75 so that the two ledges taken together
form a gate. In operation, movement of the releasing
trolling the same. For further details of the filling valve
members 66, 67 downwardly and to the left, from the po
33 reference is made to Mayer copending application
sition` shown in FIG. 5 to that shown in FIG. 6, causes
Ser. 863,334 filed December 3l, 1959, now U.S. Patent
No. 3,012,700, and, to understand the construction of the 55 the releasing ledges 75 to move out of the way of the
lowermost lid indicated at 65a permitting such lid to drop
strainer 31, reference is made to Mayer application Ser.
“clear” onto the base 61. To insure stripping of the
863,294 filed December 3l, 1959, now U.S. Patent No.
lowermost lid, the retaining ledges terminate in a wedge»
3,061,102. It will sufiice for the present to say that paint
shaped portion 77 which assists gravity in overcoming any
is efficiently strained in the strainer 31 and discharged
from the filling valve 33 in a conical stream under the 60 friction. During the dropping of the lid 65a, the succeed
ing lid indicated at 65b and the rest of the stack are re
control of the solenoid valve 37. The filling valve 33A de
having an actuator 33 and a solenoid valve 39 for con
fines a first or “lilling” station as indicated at A in the
drawing.
Extending longitudinally in the machine and centered
on a center line 40 isa conveyor which includes conveyor
chains 41, 42 which are trained over sprockets 43, 44 at
the ends of the frame (FIGS. l and 9). In carrying out
tained by. the retaining ledges 76. Later in the operating
cycle the releasing members 66, 67, are retracted, thereby
retracting the ledges 76 which permits the stack of lids to
settle on the ledges 75 and restoring the device to the
condition shown in FIG. 5.
In accordance with one of the important aspects of the
invention, embossing means are provided for embossing
the invention, the chains 41, 42 are supported on narrow
the lids in the course of their downward travel and with
vertical rails 45, 46 so that any paint which may be 70 the embossing means being utilized to effect a timed re
dripped during adjustment of the machine may drop
lease of the individual lids into dropped position on the
freely through the machine onto a suitable pan. The
awaiting can. Because of the embossment a moment be
chain supporting- arrangement providesV a minimum of ,
fore use, it is not necessary to supply pre-»embossed lids
area upon which paint may fall, and the pressure exerted
to the present machine with risk of improper identification
by the chains 41, 42 on the narrow presented edges of the 75 of contents. In the present embodiment the embossing
5
6
means generally indicated at 81? includes a pair of ern
bossing dies 81, 82. The embossing dies are of the ro
leading edge 65C is positively obstructed by the rim of
tary type journaled in spaced apart po-sition in a frame
itself witho-ut dislodging the lid from the position shown.
Moreover, the arrangement enables usage of a rather
83 mounted on the left-hand side o-f the base 61.
o
3,078,630
For
driving the embossing dies in unison with one another,
they are coupled together by a pair of gears 85, S6 (see
FIG. 4a). For the purpose of triggering rotation of the
embossing dies and for stopping them in a predetermined
“open” phase position, a single revolution clutch 90 is pro
the can and since any recoil or bounce may dissipate
steep guideway 109 thereby minimizing the size‘ and
length of the lid dropping assembly.
In accordance with one of the aspects of the present
invention the embossing elements 81, 82 are located near
the center line of the lid dropping assembly, and means
vided having an input element 91 and an output element 10 are provided for adjusting the spacing between the lid
92 as well as a release element 93 having a shoulder 94.
storage rails 63, 64, the dropping members 66, 67, and
To drive the input element 91, the input element carries
the lid guide rails thereby to accommodate the device to
a sprocket 95 about which is trained a chain 96 which
can lids having a wide range of diameter. To accomplish
receives torque from a drive sprocket 97. The latter is
powered from a gear box 98 which is constantly driven
by a motor 99. For normally engaging the shoulder 94
formed on the release element, a latch 10i! is provided
this, the lid dropping mechanism is made in two halves
movably mounted on the base 61 and simultaneously ad
justed with respect to the center line of the machine so
that the embossment always is made at the center of the
having a biasing spring 191. Clutches of the type dis
lid regardless of lid diameter. In order to understand
closed are well known to those skilled in the art. They
the details of the adjusting means, reference is made to
are generally used as single revolution clutches with 20 FIGS. 4 and 7 where it will be noted that the guide mem
momentary release of the latch producing one full revolu
bers 68, 69 are threadedly engaged by an adjusting shaft
tion of driving effort. However, it will be understood
1'10 having right and left hand threads 111, 112 with
that as used in the present device the latch is released
a handwheel 113 at its outer end. The center of the shaft
more than momentarily. Thus, in operation, as long as
11@ is held captive in the endwise direction in a mounting
the shoulder 94 on the release element is engaged by the 25 block 115 which is secured to the base 61. In order to
latch 14N?, the input element $1 is free to spin without any
adjust the lower end of the guide rails 71, 72 to the same
corresponding rotation of the output element 92 and the
degree there is provided a second adjusting shaft 120
connected embossing elements. However, when the latch
having threads 121, 122 held captive by a block 125 at
is released from the shoulder against the force of spring
the center. For the purpose of coupling the two shafts
bias, the release element becomes free causing the input 30 together, sprocket wheels 126, 127 are provided on the
and output elements to be connected together to produce
respective shafts interconnected by a sprocket chain 128.
positive rotation of the embossing elements, until such
Thus when the handwheel 113 is turned the two sides of
time as the latch 164D is restored to its engaging position
the lid dropping device are adjusted outwardly or in
in the path of movement of the shoulder 94. For fur
wardly in unison. For the purpose of maintaining the
ther details of the clutch, cross reference is made to
central storage rail 62 centered under all conditions, it
Bulletin Z39 published by the manufacturer, The Hilliard
Corpo-ration, of Elmira, New York.
is mounted on an auxiliary carrier 130 supported on rods
131, 132 which extend at right angles to one another
In carrying o-ut the invention the latch is so positioned
and which are received in slides or sockets 133, 134
that the embossing members 31, S2 come to rest in the
mounted on the side members 68, 69. It will be apparent
open positie-n shown in FIGS. l and 4a, in other words, 40 that as the side members 68, 69 are moved inwardly
with substantial clearance between them, and means are
toward the center line, there is a crowding action upon
provided for temporarily retaining a previously released
lid between the embossing elements ready to be acted
the rods 131, 132 forcing the rods to telescope into the
sockets 133, 134 and moving the carrier into the position
upon. In the present instance (FIG. 4) this retaining
shown in dot-dash outline at 135, while maintaining the
function is accomplished by a detent 105 in the form of 45 ro-d 62 in centered position. As a result the rails 62, 63,
a plunger having a detent spring 106 and arranged in
64 provide accurate three point support for all of the lids
position to engage the edge of a descending lid. It will
which may be in the stack 65 and constant width guidance
thus be apparent that when a lid is dropped by the re
is provided for the can lids, with oplimum side clearance,
leasing members 66, 67 the lid travels only a short dis
all the way down to the can.
tance until it strikes the detent 1515, whereupon the lid 50
Turning attention next to the means for “capping” the
is stopped in centered position between the embossing
cans, i.e., for pressing the loosely positioned caps into
elements. As a result, when the latch 10i) is tripped,
their seated or sealing positions, a capper assembly 140
initial rotation of the embossing elements imprints a code
is provided at a capping station C having a plunger 141
number in the lid and simultaneously forces the lid be
powered by a pneumatic actuator 142 under the control
yond the detent to a dropped position upon the awaiting 55 of a solenoid valve 143. When the solenoid valve is
can. While the electrical control means for effecting
energized, compressed air is admitted to the actuator 142
release of the latch 1% will be discussed at a later point,
it may be noted in FIG. 11 that the latch is moved by an
actuator 1417 which is controlled by a solenoid valve 10S.
After the lid is acted upon by the embossing members 60
thrusting the plunger 141 downwardly and pressing the
lid firmly into position. The actuator 142 may be so
selected and the air pressure so adjusted that the lid is
forced downwardly flush with the top of the can, while
it is passed downwardly along a guideway portio-n 109
keeping the force nevertheless below that which might
into engagement with a can which is stationary and await
ing to receive it. However, it may be noted, as shown
tend to deform the wall of the can.
In accordance with one of the aspects of the present
in FIG. 8, that guideway 109 angularly overlies the await
invention all'three of the assemblies including the- ñlling
ing can with just the far edge of the latter exposed so 65 assembly 31), the lid dropping assembly 6i! and the cap
that the lid is not dropped flatly upon the can. Thus,
ping assembly 140 are located in line with one another
the leading edge 65e of the lid engages only the rim of
along the center line of the machine and mounted upon
the can while the lid proper is still supported on the
a co-mmon elevated support or platform having provision
guideway 109. Final movement of the lid into hori
for raising and lowering the same for simultaneously
zontal or capping position does not take place until sub 70 accommodating the assemblies to the height of the cans
sequent movement of the conveyor. It is found that thus
being run. In addition, guide rails are provided along
applying a lid to a can in two steps is accompanied by
the conveyor which are adjustable inwardly and out
a number of advantages. In the iirst place the lid is
wardly in unison in order to maintain the row of cans
more certain to be accurately centered with respect to
centered with respect to the center line of the machine.
the can for the subsequent capping operation since the 75 Referring particularly to FIGS. 1 and 9 of the drawings,
3,078,630
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the elevated support indicated at 150 extends almost
the entire length of the machine and is supported at its
ends on vertical screws 151, 152 engaging nuts 151a,
carrier 150 by means of clamping screws >193, 194». To
adjust the filling assembly and hence the filling head 33,
the clamping screws 193, 194 are loosened and the entire
152a. Only the two screws on the “near” side of the ma~
assembly is slid backw-ardly or forwardly upon the sup~
chine are shown, and it will be understood that corre
sponding screws are provided on the “far” side of the
port 150, with the screws being retightened at a new
position to establish a station to station spacing 196.
machine to give stable, four point support. For the pur
pose of supporting the lower ends of the screws 151, 152,
journal bearings‘153, 154 are provided fastened to the lon
gitudinal frame members 21, 22 previously referred to.
In accordance with one of the aspects of the present
invention not only is the filling head 33 properly posi~
tioncd with respect to the row of cans, but auxiliary means
are provided for engaging each can at the filling station
for precisely centering it with respect to the filling head.
To rotate the screws, they are furnished with sprockets
155, 156 interconnected by a sprocket chain 157. The
sprocket chain 157 is in turn driven by a motor 158
having a stepdown driving connection 159. It will be
To understand the construction of the centering member
and its adjusting arrangement, reference is made to FiGS.
9 and 10. ln carrying out the invention the centering
apparent therefore that when it is desired to raise or
member is lateraly movable with respect to the can and
lower the elevated platform 150, actuation of the motor
158 in one direction. or the other by suitable control
means (not shown) acting through the drive connection
159 and chain 157 rotates all of the screws in unison
so that the platform is moved up or down while> main
taining it in precisely level position.
For the purpose of maintaining the can centered, hori
zontal guide rails 161, 162 are provided (FIG. 9) to~
is provided with spaced abutments which engage the can
crowding it either backwardly or forwardly so that it
precisely alined with the fiiiing head. Referring to the
present embodiment, the centering assembly 200 includes
a centering member 201 which is slidable in a carrier 202.
At its forward end the centering member 201 is scalloped
as indicated at 203 defining spaced points of abutment
204. For the purpose of advancing or retracting the
centering member 201 with respect to the carrier, an ac
gether with means for moving them inwardly ancl> out
is provided which is under the control of a
wardly with respect to the center line 40 of the machine. 25 tuator
solenoid valve 266. For reasons which will become clear
In the present device the guide rails are mounted upon
slidable guide rail carriers 163, 164 having brackets
as the discussion proceeds, the solenoid valve is so ar
165, 166. Threaded into the brackets is a transversely
ranged that when the winding thereof is deenergized the
the outer end of the adjusting shaft 167 is a handwheel
170. At the opposite or left hand end of the machine
as viewed in FIG. 1, a corresponding'transverse adjust
care of an extreme range of can size, the centering mem
are trainedl a sprocket chain 175.
machine but is, instead, slidably mounted on a bracket
centering member 231 is advanced into engagement with
extending adjusting shaft 167 which is held captive in
the endwise direction in bearings 168, 169 secured to 30 a can whereas when the winding is energized the centering
member 201 is retracted. If desired, and in order to take
the longitudinal frame members of the machine. Aty
ber 201 is preferably provided with a removable tip 207
secured in place by means of thumbscrews 268.
To en
ing shaft 171 is provided engaging brackets 172 similar 35 able adjustment of the carrier 202 and thereby to es
tablish a normal position for the centering member 201,
to the brackets shown in FIG. 9; The adjusting shafts
the
carrier is not secured directly to the frame 21 of the
167, 171 have sprocket wheels 173, 174 about which
It Ywill be apparent
111 which is welded or otherwise secured to the frame
then, that upon rotating the handwheel 170, both of the
shafts 167, 171 are rotated so that the guide rails 161, 40 21. Engaging the end of the bracket 111 is a clamp 112
having a clamping screw 113; Thus to adjust the posi
162 are moved inwardly or outwardly in unison relative
tion of the centering member the carrier 202 is slid along
to the center line of the machine. In practice the machine
the bracket 111 to an adjusted position following which
is adjusted byv rotating the handwheel 170 until the
the clamp‘is again tightened.
guide rails touch the sides ofthe cans following which
In the above paragraphs the primary structural features
the wheel isl backed off to provide a small amount of
of the invention have been discussed, particularly the con~
clearance thereby to reducethe friction of the` guides
veyor, the three assemblies which act upon the cans con
against the cans.
veyed
by the conveyor, and the novel means for position
In accordance with one of the aspects of the present
ing the assemblies relative to the cans and to one another
invention, means are provided for adjusting the spacing
to accommodate various sizes of cans and to define three
between the filling station A, the lididropping station B,
and‘capping station C so that they are spaced apart- by
an integral number of can diameters. Thus when cans
are fed in a continuous series operations may be simul
taneously performedat all of the three stations. While
it‘would be possiblel to adjust any two of the assemblies
relative to the third, we have chosen to mount the capping
assembly 140 in fixed position on the supporting platform
150, measuring all of the distances from it, while making
operating stations where the cans are acted upon simul
taneously. However, in accordance with one of the im
portant aspects of the invention, novel control means are
provided for integrating and interlocking the various func
tions so that they take place in a predetermined sequence
and in a positively controlled fashion thereby producing
incremental advancement of the cans while precluding any
possibility that paint will be spilled or that the cans will
be improperly filled or improperly sealed. Experience
has shown that machines of the present design are sufli~
adjustable. Turning first to the means for adjusting and
ciently reliable so that the filled and sealed cans coming
mounting the lid dropping assembly, the base 61 thereof 60 from
the discharge end of the machine are ready for pack
is mounted upon two cross members 181, 182 which are
ing and shipment with but casual inspection.
slidable upon the carrier 150 and which are spaced apart
Thus it is one of the features of the present machine
by rods 183, only the near one of them being visible in
that
the presence of an empty can below the fill head is
FIG. l; For the purpose of clamping the assembly ina
confirmed by special detecting means mounted upon the
desired position, a clamping screw 185. is threaded into
centering member as the centering member is advanced to
the cross member 182. Thus, positioning the lid drop~
can
engagement, with the presence of the can serving to
ping assembly is simply a matter of sliding the assembly
initiate operation of a measuring means for measuring
longitudinally until a station to station distance 186 is
out a precise amount of the paint or other liquid required
established whereupon the clamping screw 185 is'turned
to
fill the can. Turning to FIGS. 10 and ll a detector
70
tight to maintain the adjustment. Similarly, to adjust'the
switch 220 is used mounted on the centering member 201
filling assembly 30 with respect to the capping assembly,
and reciprocated with it. The switch 220 is provided
the strainer 31 is` mounted upon brackets 191, 192.
with
a plunger 221 which is mounted in suitable guides
Again, only the brackets on the “near” side are shown and
the filling assembly and liddropping assembly relatively
corresponding brackets are employedY on the “far” side of
the machine. The brackets are secured in position on the
222. As the centering member 201 is moved toward the
can, the can is struck by the plunger 221 which reacts
3,078,630
9.
llt).
upon the switch 22h to close an electrical circuit. In
carrying out the invention closure of the electrical circuit
advanced into the capping position, a conveyor holding
triggers operation of a timer 2.3i) having a timing motor
relay 2R is providing having “sealing in” contacts 2K1
231, a clutch solenoid 232, a load contact 233 and a
“time-out” contact 234. The timing motor is moreover
provided with a “sealing in” contact 235 to insure that,
once the timer is energized, the contact 233 will stay closed
for the entire time-d interval. The second contact 234
referred to as the “time-out” contact is closed momentarily
and normally open contacts 2R2. To insure that the con
veyor is disabled at all times that the fill valve 33 is open,
a lill valve conveyor interlock relay 3R is provided which
closed, and the conveyor inmotion, until a new can is
is connected in parallel with the till valve solenoid and
which has normally closed contacs which are connected
in series wtih the sensing switch 25d at the capping station
The time is adjusted by 10 contacts SR1.
means of a control member 236. To facilitate under
It will be apparent from the control diagram that the
standing of the operation of the timer it will be helpful
solenoid valves associated with all of the functions except
at the end of the timed interval.
to identify terminals as follows: Terminals L-1 and L-2
the can detector at the filling station are connected in
are power input terminals connected to correspondingly
parallel with one another, being fed from a timer output
numbered supply lines which may be the regular A.~C. 15 or control bus 276` which is connected to the main output
line. Terminal 237 is an input terminal which, as shown,
terminal 233 of the timer.
is connected to the clutch in order to initiate the timed
With the above in mind, the various features and ad
cycle. Terminal 23S is the main output terminal which
vantages of the control circuit will become apparent upon
supplies power to the associated components, primarily the
considering a typical operating sequence.
solenoid valves, during the timed interval, while the sec
Assuming that the automatic cycling is to be initiated
ond output terminal 239 supplies a short output pulse
with no can in the machine (the machine may also be
at the end of the timed interval. As is conventional in
started iìlled with cans if desired), th-e switches 260 and
timing devices, the device includes provisioin for “re
261 are closed to energize the circuit. With no can in
setting itself to zero” automatically at the end of the
the capping station, the can sensing switch 250 is in the
timed interval, i.e., when the solenoid 232 is deenergized 25 “no can” position. Current is thus supplied to the con
by opening of the switch 220. For further details of the
veyor relay 1R via the switch 250 and through the closed
construction of the timer per se, reference is made t0
`interlocking contacts 3R1. Energization of the relay 1R
Bulletin 110C published by the Eagle Signal Corporation
opens the contacts 1K2 deenergizing the brake and closes
of Moline, Illinois.
the contacts 1R1 energizing lthe clutch. This starts th-e
In accordance with one of the aspects of the present 30 conveyor moving with cans being crowded onto the con
invention, means are provided for sensing the arrival of
veyor from the supply or crowding table 57. During this
a can at a reference position in order to stop the con
veyor when cans are in the three stations and for there
upon actuating the can detector at the filling station to initi
ate the filling operation.
time the solenoid valve 206 is deenergized serving to re
tract the centering and detecting member 201 at the filling
station and permitting cans freely to pass the ñlling sta
In carrying out the invention we 35 tion. Movement continues until a can reaches the cap
prefer to locate such sensing switch at the capping station,
in other words, at the “downstream” one of the three
stations. Sensing the arrival of a can at the last station
tends to insure that cans are also present at the two earlier
stations since the cans are crowded from behind by reason 40
of the crowding table 57 previously described. Turning
to the fragmentary view, FIG. 3, it will be noted that a
switch 25d is provided at the station C. This switch may
be in the form of a single pole double throw microswitch
having a short “snap” time and o-perated by a pivoted lever
ping station thus throwing the can sensing switch 250 into
its upper or “can” position.
This deenergizes the con
veyor relay 1R, opening the clutch contacts 1R1 and
closing the brake contacts 1R2, thereby discontinuing fur
ther advancement of the conveyor. Deenergization of
the relay 1R moreover closes the contacts 1K3 which en
ergize the solenoid valve 206 >thereby advancing the cen
tering member 261 and its detector switch 220 into can
engagement. The can in the filling s-tation is physically
centered as described, and actuation of the plunger 221
251 having a cam follower 252. For ease in understand 45 thereon closes the switch 220, applying voltage to the
ing the operation, the upper terminal of the switch 25@ has
timer input terminal 237 and starting the timed interval.
been designated as the “can” terminal and the lower ter
When the timer is thus turned “on,” the contacts 233
minal as the “no can” terminal.
therein energize the control bus 270 which produces oper
Prior to discussing the manner in which the control
ation at all three of the operating stations. In the first
circuit of FIG. ll carries out the desired sequencing and 50 place the solenoid valve 37 associated with the fill valve
interlocking functions, it will be desirable to identify the
33 is energized opening the lill valve so that paint begins
vario-us switches used in the circuit. Thus, connected in
to
fl-ow into the can centered directly below. The sole
series with the supply line L-1 is a switch 260 which
noid valve 39 associated with the strainer causes the
serves to turn the entire circuit “on” or “011.” Connected
plunger within the strainer to be idly retracted as de
in series with the conveyor motor St) is a switch 261 which
is normally closed to cause the conveyor motor to oper
ate continuously, it being kept in mind that the output is
controlled by clutch 55 and brake 56. For supplying di
scribed in copending application Ser. 863,294. Energi
zation of the solenoid valve 73 associated with the liddrop device retracts the lid release member in-to the po
rect voltage to the clutch and brake a bridge rectiñer 262
sition shown in FIG. 5 although no lid is dropped. 4 Toy
include a first switch 263 which is interposed between the
switch 22S and the timer 230 and a single-pole double
that the embosser is free to rotate.
1R12 and detector interlock contacts 1R35, the contacts 1R52
and 1133 being normally closed.
._
first can is not provided with a lid.
For the purpose of responding to the short pulse from
the terminal 239 of the timer, which marks the end of
the timed interval, and for maintaining the conveyor relay
During the “on” interval of the timer the fill valve
continues to discharge paint into the receiving can, with
the timed interval being suñiciently accurate that under
is provided which is connected directly across the supply 60 make up for the lack during this first cycle a lid may be
manually placed in the detent-retained position at thel
lines. Two additional switches are incorporated which
embosser. Energization of the emboss-er solenoid valve
are normally closed to provide automatic cycling. These
10S causes the actuator 107 to release the latchltlt) so
The ñrst revolution
throw switch 264 which will be assumed, in the discussion 65 of the embosser embosses the lid in embossing position but
additional rotations of the embossing dies take place idly
of the operation, to remain in the “auto” position shown.
during the interval that the control bus 270 is energized.
For the purpose of controlling energization of the clutch
Finally the solenoid valve 143 associated with the capper
5S and brake 56 and also to actuate the can detector at
14€) is energized, thus thrusting the cap plunger 141 down
the filling station, a conveyor relay iR is employed. This
relay is provided with clutch contacts 1K1, brake contacts 70 into pressing engagement with the can in the capping sta
tion.
This movement is, however, an idle one since the
'
3,078,680
11
the given gravity head conditions the can is filled to within
a short distance of the top.
At the end of the timed interval as the timer “times out”
two things happen within the timer. In the first place
the main timing contacts 233 are opened. This deener
gizes the control bus 270. Next the “time out” contacts
234 close momentarily thus applying a short pulse of
12
ment, fed from an overhead vat, that only a slight drop
in pressure occurs even though the vat level may fall from
maximum to minimum. The reason for this is that the
vat itself is located substantially above the machine, with
a gravity head existing in the supply line 25. Any drop in
pressure is noted by the operator as a slight drop in the
level of paint in the can, and this drop may be compen
sated for simply by making a slight increase in the setting
of the timer. The last few cans may be filled manually
voltage to the timer output terminal 239. Turning atten
tion first to the effects of deenergizing the control bus
270, the following may be noted. The fill valve is closed. l0 by operating the switches 263, 264. To accomplish this
the switch 254 is thrown to its manual position to turn the
Next the plunger within the strainer is thrust downwardly,
fill valve “on” and the switch 263 is momentarily closed
backflushing the strainer. (The resulting pulse of pres
to advance another can into the filling station.
sure does not affect discharge from the fill valve since the
It will be apparent to one skilled in the art that the
fill valve is closed.) Deenergizing the lid drop solenoid
73 causes the actuators 71, 72 to move forwardly into the 15 present filling machine amply fulfills the objects stated
above. The cans are accurately filled, properly sealed
position shown in FIG. 6 thereby dropping a lid onto the
and positively identified by an embossment made at the
guide rails where it is held adjacent the embossing dies,
by the detent 165. Deenergization of -the embossing
solenoid valve 166 causes the actuator 107 to be retracted
thereby latching` the release member 94 of` the clutch in
fixed position and positioning the embossingV dies spaced
apart and in readiness for the successive embossing opera--
moment of filling. Accurate identification makes possible
the high degree of control of product which is essential
in the paint industry, with each can being subject to later
comparison, if necessary, with a portion of the same >batch
retained at the factory. All this is accomplished auto
matically at high speed and without danger of spillage
tion. It may be noted that the operation of the latch 190
over a wide range of can size.
is prompt so that the embossing dies are stationary and
While the device is especially suited for the filling of
separated by the time that the dropped lid reaches them. 25
“press-top” paint cans, it will be apparent to one skilled
Finally, deenergization of the capping solenoid valve 143
in the art that the invention is not limited thereto, or to
causes the plunger 141 to be retracted. The interlock re
particular liquids or particular container materials and
lay 3R is dropped out closing the interlock contacts SR1
consequently the term “can” in the claims is used in a
so that a current path is set up for the relay 1R which, as
will be seen, startsthe conveyor.
generic sense.
We claim as our invention:
Turning next to the second effect in the timer 230, the
1. In a can filling machine the combination compris
production of a momentary output voltage at the output
ing a filling station having a filling valve and source of
terminal 239 energizes the conveyor holding relay 2R.
liquid, a lid dropping station having an embosser for in
This relay seals itself in via the sealing contacts 2R1,
it being understood that, at that time, the sensing switch 35 dividual dropping of embossed lids, a capping station
having means for pressing the lids in place, a power
250 is in its upper or “can” position, there being a can
driven conveyor for conveying cans through said stations
at the capping station. Closure of terminals 2R2 on the
in a closely spaced series, said stations being spaced apart
holding relay 2R completes the circuit to the conveyor re
an integral number of can diameters, means including a
lay 1R. Energization of the latter actuates the clutch 55
via contacts 1R1 and deactivates the brake 56 by opening 40 switch adjacent the conveyor for sensing the arrival of a
can, control means coupled to the sensing switch for
contacts 1R2. Moreover, energization of the conveyor
normally powering the conveyor but having provision
-relay 1R opens the contacts 1R3 thereby deenergizing the
upon arrival of a can at the switch for terminating oper
solenoid valve 206 to produce retraction of the centering
ation of the conveyor and for (l) producing discharge of
member 201 out of the way of the moving cans.
a predetermined quantity of liquid from said valve, (2)
After the conveyor starts and the can in the capping
station begins to move out of the station, the switch 250 45 operating said embosser and (3) operating said pressing
quickly snaps from its upper position to its lower or “no
means at the respective stations, said control means in
cluding an auxiliary circuit actuated upon completion of
can” position.
This establishes an alternate source of
voltage for the conveyor relay 1R. The action takes
discharge of liquid from said valve for temporarily by
place quickly and, as the relay 2R is a time delay relay
passing the sensing switch to start movement of the con
with delay on dropout, a newV source of current is pro
veyor and for thereafter restoring control to the sensing
vided to relay 1R before relay 2R drops out, so that the
switch so that the sensing switch is in readiness to respond
relay 1R remains energized. The movement of the switch
to the arrival of the next can in the series.
250 to the "no can” position, however, opens the sealing
2. ln a can filling machine the combination compris
circuit of the conveyor holding relay which-now drops out
ing a filling station having a filling valve and source of
being no longer required. With the conveyor relay 1R
liquid, a conveyor for conveying cans through said filling
energized, the conveyor continues to advance until a new
can comes into the capping position, whereupon the sens
station in a closely spaced series, means including a switch
adjacent the conveyor downstream from said filling sta
tion for sensing the arrival of a can in the series, the
ing switch 250 snaps to its “can” position, thereby deener
gizing the conveyor relay 1R. When this relay is deener
filling head being so spaced with respect to the sensing
gized the conveyor stops and the centering member 291 is 60 switch that a can is in filling position when the sensing
projected into engagement with the can at the filling sta
switch is operated, control means coupled to the sensing
tion.
When the switch 220 “confirms” that a can is
present‘in the filling station, current is applied to the in
switch and actuated incident to the presence of a can in
the filiing station for terminating operation of the con
veyor and for turning on the filling valve for discharge
cycle. The fill valve again operates, the embosser ro 65 of a predetermined quantity of liquid into the can at the
tates dropping an embossed lid, and the capper presses a
filling station, said control means including an auxiliary
lid in place. As the cycle is repeated over and over, cans
circuit actuated at the completion of the operation of the
are fed from the end of the machine onto a suitable con
measuring means for taking over control from the sensing
veyor which conveys them to the packing and shipping
department. It is found that the machine operates auto 70 switch and causing continued operation of the conveyor
put terminal 237 of the timer which starts a new timing
matically with near perfect reliability. Little or no atten
tion is required on the part of the operator except to see
that the input end is kept supplied with empty cans and to
see that the supply of lids is adequate.
Itis found when using the present ñll valve arrange
notwithstanding the operated condition of the sensing
switch, and means for shortly thereafter restoring control
to the sensing switch so that the switch is again effective
to actuate the control means in response to arrival of the
75 next can in the series to produce a repetitive cycle.
1..
3,078,630
13'
la
3. In a can filling machine the combination comprising
a filling station having a filling valve and source of liquid,
a conveyor for conveying cans through said filling station
in a closely spaced series, means including a switch ad
jacent the conveyor downstream from said filling station
a filling station having a source of liquid and a filling
valve, and dropping station having a source of lids and
having a lid guide, means for releasing lids indi-vidually
from the source onto said lid guide, a capping station
having means for pressing the lids into sealing position,
means for conveying cans step by step from one of the
having an initial “no can” condition but switched to an
alternate “can” position upon the arrival of a can in the
stations to the next, embossing means straddling said
lid guide and having a pair of rotary dies together with
means for rotating the dies starting from open position,
series, the filling head being so spaced with respect to the
sensing switch that a can is in filling position when the
sensing switch is switched, control means coupled to the
sensing switch and actuated upon the switching thereof
for terminating operation of the conveyor and for turning
on the filling valve for discharge of a predetermined
quantity of liquid into the can at the filling station, said
a detent associated with said lid guide for retaining a
released lid in position between the open dies and ready
for embossment by the latter, means actuated when cans
are in the stations for stopping the conveyor means and
for actuating the embossing means along with the filling
control means including an auxiliary circuit actuated at 15 valve and pressing means so that the lid retained in the
the completion of the operation of the measuring means
for initiating continued operation of the conveyor until
after the sensing switch is restored to its initial “no can”
condition so that the sensing switch is again capable of
responding to arrival of the next can in the series.
embossing means is passed downwardly on said guide into
dropped position on the can, and means for restarting
the conveyor and actuating the releasing means after a
predetermined amount of liquid has been discharged into
‘ 20 said can.
4. In a can filling machine the combination comprising
a filling station having a filling valve and source of liquid,
8. In a can ñlling machine the combination comprising
a filling station having a filling head and a source of liquid
together with means for measuring out a predetermined
quantity of liquid, a lid dropping station having a source
a conveyor for conveying cans through said filling station
in a closely spaced series, means including a switch ad
jacent the conveyor downstream from said filling station 25 of lids and lid guiding means for guiding lids downwardly
for sensing the arrival of a can in the series, the filling
into dropped position, an embossing device located in
head being so spaced with respect to the sensing switch
the path of the lids on the lid gui-de having means for
that a can is in filling position when the sensing switch
retaining a lid until the same is embossed, driving means
is operated, control means coupled to the sensing switch
-for operating the embossing means, means for con
and actuated incident to the presence of a canin the filling 30 veying cans intermittently from said filling station to said
station for terminating operation ofthe conveyor and for
lid dropping station, said filling station and said lid
turning onthe filling valve for discharge of a predeter
dropping station being so spaced that cans arrive simul
mined quantity of liquid in_to the can at the ñlling station,
taneously in both stations, and means responsive to the
said control means including an auxiliary circuit actuated
arrival of the cans for simultaneously initiating said
at the completion of the operation of the measuring 35 measuring means and for cycling said embossing means
means for temporarily powering the conveyor notwith
so that an embossed lid is dropped into position upon
standing the then operated condition of the sensing switch.
the awaiting can, and means for subsequently pressing
5. In a can filling machine the combination comprising
the dropped lid into seated position.
a` filling station having a source of liquid and a filling
9. In a can filling machine the combination compris
40
valve, a lid dropping station having a source of unem
ing a filling station having means for depositing a pre~
determined amount of liquid in a can, a lid dropping
station, a conveyor for conveying cans intermittently
bossed lids, means for releasing lids individually from
the source, a capping station having means for pressing
thel lids into sealing position, means for conveying cans
step by step from one of the stations to the next, emboss
ing means havingmeans for retaining released lids in 45
in the stations for stopping the conveyor means and for
actuating theembossing means along with the filling valve
position for embossment, means` actuated when cans are
from said filling station to said lid dropping station, said
lid dropping station having means for storing a quantity
of lids in a stack and having a pair of reciprocated re
lease members for releasing the lids from the bottom of
the stack one by one, a pair of inclined guide members
for guiding a released lid downwardly from the point of
and pressing means lso that the lid retained in the em
release, and meansy for simultaneously adjusting the
bossing means is embossed and passed downwardly into 50 spacing of said release members and said guide members
dropped position on the can, andrneans for restarting the
for accommodating lids of different diameter.
conveyor and `actuating the releasing _means after a pre
10. In a can filling machine the combination compris
determined amount of liquid has been discharged into
ing a filling station having means for depositing a pre
said can.
_
.
i.
,
_ 6. In a can filling machine the combination comprising
afilling station having a source of liquid and a filling
determined amount of liquid in a can, a lid dropping
-55 station, a conveyor for conveying cans intermittently from
valve, a lid dropping station having a source of unem
bossed lids, means for releasing lids individually from the
source, a capping station having means for pressing the
lids into sealing position, means for intermittently con
veying cans in closely spaced series from one of the sta 60
tions to the next, rotary embossing means at the output of
the releasing means and having a pair of cooperating em
bossing dies together with driving means for rotating the
dies >starting from their open position, means for tem
porarily retaining a released lid between the dies with the
same in their open position, means actuated when cans
are in the stations for stopping the conveyor means and
for actuating the embossing means along with the filling
valve and pressing means so that the lid retained in the
embossing means is embossed and dropped into position
on the awaiting can, and means for restarting the con
veyor after a predetermined amount of liquid has been
discharged into said can.
'77. In a can;filling machine the combination comprising
said filling station to said lid dropping station, said lid
dropping station having >means for storing a quantity of
lids in a stack amd having a pair of reciprocated release
members for releasing the lids from the bottom of the
stack one by one, a pair of inclined guide members for
guiding the release lids downwardly from the point of
release, embossing dies straddling the guide members,
and means for simultaneously adjusting the spacing of
said release members and said guide members relative
to the embossing dies so that the lids are released and
embossed substantially in the middle thereof regardless
of lid diameter.
l1. ln a can filling machine the combination comprising
a filling station having a filling valve and source of liquid,
a capping station having means for applving caps to
the filled cans, means including a conveyor for conveying
cans successively into the filling station and capping sta
tion. can detecting means at the filling station for deter
mining whether a can is in centered position below the
75 filling valve, means for sensing arrival of a can at- the
accesso
15
16
capping station for terminating the action of the conveyor
ing a filling station having a filling valve and source of
and for initiating action of the can detecting means,
timing means initiated by the can detecting means for
causing fiow of liquid into the can over a predetermined
liquid, a power driven conveyer for conveying cans
time interval and for causing operation of the capping
with a can in the filling station', can centering means at
seriatim into and out of the filling station, means down
stream from the filling station for stopping the conveyor
the filling station, said can centering means including
a member having spaced points of can engagement and
interval for restarting the conveyor.
having provision for lateral movement between a re
12. in a can filling machine the combination compris
tracted position clear of the cans and an extended position
ing a filling station having a filling valve and source of
liquid, a capping station having means for capping the ll) in which the can is centeringly engaged by the points,
means operated incident -to the stoppage of the conveyor
cans subsequent to the filling thereof, means including
for
bringing the centering member into can engaging
a conveyor for conveying cans successively into said
position and for simultaneously producing discharge of
filling station and said capping station, detecting means for
liquid from the filling valve into the can, and means in
stopping the conveyor when a can is in centered position
cident to the depositing of a rated amount of liquid in
below the filling station, means including a timer coupled
the can for retracting the centering member and for
to said detecting means and controllably connected to the
means, and means actuated at the end of the timed
filling valve for producing a timed discharge of liquid
into the can at the filling station and for operating the
capping means, yand means coupled to the timer and
actuated at the completion of the timed interval for re
starting the conveyor in order to bring a successive can
into position in the filling station.
13. In a can' filling machine the combination compris
ing a filling station having a filling valve and source of
liquid, a capping station having means for applying caps
to the filled cans, a conveyor for conveying cans through
reactivating the conveyor means for movement of a suc
cessive can into the filling station.
17. In a can filling machine the combination compris
ing a filling station having a filling valve and source of
liquid, a power driven conveyor for conveying cans
seriatim into and out of the filling station, means for
stopping the conveyor with a can in the filling station,
can centering means at the'filling‘ station, said can cen
tering means including» a member Áhaving spaced points
of can engagement and having provision for lateral move
said filling station and capping station in a closely spaced
series, means downstream from said filling station for
ment between a retracted position clear of 'the cans and
can centering means at the filling station, said can cen
a power driven conveyor for conveying a series of cans
an extended position in which the can is centeringly en
gaged by the points, means operated incident to the stop
sensing the arrival of a can in the series, said sensing
means` being so spaced with respect to the filling means 30 page of the conveyor for bringing the centering member
into can engaging position, a can detector on said cen
that when said sensing means is actuated a subsequent
tering member nîor verifying presence of a can engaged
can in the series is in the filling station, a can detector
by the centering member for initiating discharge of liquid
at said filling station for detecting the presence of a pre-4
from the filling valve into the can, and means incident
cisely centered can, means operated by said sensing means
to the depositing of a rated amount of liquid in the can
for terminating operation of the conveyor and for initi
for retracting the centering‘member and for reactivating
ating operation of the can detecting means at the filling
the conveyor means for movemen-t of a successive can
station, means triggered by the detecting means for
into the ñlling station.
measuring out «a predetermined quantity of liquid into
18. In a can filling machine the combination compris»
the can at the filling station and for actuating the capping
ing
a filling station having a filling valve and source of
40
means at the capping station, and means actuated at the
liquid, a power driven conveyor for moving cans seriatim
completion of the oper-taion of the measuring means for
into and out of said filling station, means operated incident
restarting the conveyor.
`
to
the arrival of a can at the filling station ‘for terminat‘
14. In a can filling machine the combination com
ing the operation of the conveyor, a can centering device
prising a filling station having a filling valve connected
at the filling station, said can centering device including
to a source of liquid, a power driven conveyor for con
an arcuate member movable laterally with respect to
veying a series of cans into and away from 'the filling
the Iconveyor and for engaging the can at spaced points
station, means actuated incident to arrival of a can at
about the periphery thereof thereby to crowd the can
the filling station for stopping the conveyor, means for
either forwardly or backwardly a small amount and into
sensing the can at the filling station and for precisely
centering it under the filling valve, means actuated inci 50 alinement with the filling valve, a switch mounted on
said arcuate member arranged for operation when the
dent to the operation of the can sensing means for
centering means centeringly engages a can thereby to
measuring out a predetermined amount of liquid from
verify
the presence of a can in the filling station, means
the filling valve to said can, and means actuated upon
for measuring out a predetermined amount of liquid
completion of' the measurement for restarting the con
from the filling valve into the can, said measuring means
veyor in order to bring a successive can into filling po
being
coupled to said switch so that the operation of the
sition.
measuring means is initiated thereby, and means operated
15. In a can filling machine the combination compris
incident to completion of the measurement for retract
ing a filling station having a filling valve and source of
ing the centering means and for reactivating the conveyor
liquid, a power driven conveyor for conveying cans
means so that the adjacent can is brought into the filling
seriatim into and out of the filling station, means ad
station.
jacent said conveyor downstream from the filling station
19. In a can filling machine the combination comprising
for stopping the conveyor with a can in the filling station,
tering means having provision for movement between
a retracted position clear of the cans and an extended
position in which the can is centeringly engaged, means
operated incident to ythe stoppage of Áthe conveyor for
bringing the centering means into the centering position
and for simultaneously producing discharge of liquid
along a path of movement, guide rails on the respective
sides of the cans, a filling station having a filling valve
and source of liquid, a lid dropping station having means
for dropping a lid upon an awaiting can, and a capping
station having means for pressing the lid into seated po
sition, said stations being spaced along the length of the
conveyor and laterally centered with respect to the cen
from the filling valve into the can, and means incident
to the depositing of a rated amount of liquid in the can
terline thereof, means for adjusting the longitudinal spac
for retracting the centering means and for reactivating
ing of the stations so that a can is simultaneously cen
the conveyor means for movement of a successive can
into the filling station.
16. In ïa can filling machine the combination compris
tered in each of them when transported in closely spaced
series by said conveyor, and means for adjusting the guide
rails with respect to the center line of the conveyor so
apt/asso
17
18
that the cans are always laterally centered with respect
to said stations Aregardless ofthe diame-ter of the cans.
2G. In a can ñlling machine the combination compris
laterally centered with 4respect to said stations regardless
ing a power driven conveyor for conveying a series of
cans along ya path of movement, guide rails on the respec
tive sides of the cans, a ñlling station having a ñlling
of the diameter of the cans, and an elevated support, said
ñlling valve as well as the dropping means and pressing
means `being mounted on said support and said support
having means for adjusting the height thereof `above the
conveyor to Iaccommodate cans of differing height.
valve and source of liquid, a lid dropping station having
means for dropping a lid upon an awaiting can, and a
capping station having means for pressing the lid into
seated position, said stations being spaced along the 10
References Cited in the file of this patent
UNITED STATES PATENTS
length of the conveyor and centered with respect to it,
1,615,040
means for adjusting the spacing of the stations so that a
can is simultaneously centered in each of them when
1,913,743
Borchert _____ __’ ...... _.. June 13, 1933
1,920,869
Kronquest ____________ __ Aug. 1, 1933
2,180,954
2,684,627
2,782,577
Harrison ____________ _.. Nov. 21, 1939
Duhan _______________ __ July 27, 1954
Beall ________________ __ Feb. 26, 1957
transported in closely spaced series by said conveyor,
means for adjusting ythe guide rails with respect to the 15
center line of the conveyor so that the cans are always
Risser ________________ .__ Ian. 18, 1927
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