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Патент USA US2408226

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. Sept-'24, 1946-
Filed July 22, 1942
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Filed July 22, 1942
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Patented Sept. 24, 1946
William R.
_ Peterson, Oswego, N. Y., assignor to
St. Rcgls Paper Company, New York, N. Y., a.
corporation of New York
Application July 22, 1942, Serial No. 451,883
5 Claims. (01. 249-60)
This invention relates to apparatus for ?lling
valve bags, simultaneously weighing the bags,
automatically discharging the bags when
An object of the invention is to provide appa
ratus of the type described which will mechan
ically open the shut-01f slide or gate, start the
?ow of material to the bag, when the bag has
been placed in position and the apparatus
tripped, and continue the ?lling and weighing op
eration automatically until the ?lled and weighed
bag has been discharged and the apparatus is
to position for receiving another empty
2 .
mechanism from a different angle than Figure
In my copending applications Serial No. 507,
521, ?led October 25, 1943, and Serial No. 667,
418, ?led May 4, 1946, there are disclosed and
claimed other forms of machines having fea
tures which are common to that herein disclosed.
The apparatus embodying the invention is
mounted upon suitable framework, some of which
is shown as at 20 in Figure l and some of which
is omitted in order to more clearly disclose the
operating mechanism. The bag ?lling apparatus
comprises a hopper 2| which may be connected
with any suitable source of supply of cement or
15 other material to be packaged. At the bottom
of the hopper, there is a propeller housing 22
in which there is a constantly rotating propeller
23. At the right of the housing, as shown in
Figure 1, there is a discharge opening 24 nor
20 mally in alignment with a ?lling spout 25. The
propeller is normally in continuous operation
means for positively discharging the bag from
?lled position.
during the use of the mechanism, but discharge
of material is out 01f when desired by a suitable
Minor objects and improvements will appear
as the description proceeds.
cut-01f slide or gate 26. The gate is operated
In the accompanying drawings forming a part 25 by a rod 21 in a manner which will be described
of this speci?cation-—
A double armed scale beam 28 is fulcrumed at
Figure 1 is a side elevation of one embodiment
29 and carries a suitable weight 30 ?xed to the
of the invention, with parts in section and with
parts removed for clarity of illustration;
30 scale beam, as shown at 3|, It will be seen that
the weight is rigidly fastened to the scale beam
Figure 2 is an isometric elevation of the ap
paratus shown in Figure 1;
and, therefore, gives the scale beam a pendulum
action. The front end of the scale beam is pro
Figure 3 is a partial front elevation of the
7 vided with pivots 32 for a load support, Fig. 2.
apparatus shown in Figure 1;
A rigid stop member 33 projects from the frame
Figure 4 is a section on the line 4—4 of Fig
ure 3;
Figure 5 is a detail view of a trip handle;
Figure 6 is a detail view of means for releas
over the rear end of the scale beam and an ad
justable stop screw 34 mounted in the scale beam
arms limits the height to which the rear end of
ing the bag clamp;
the scale beam may rise and the frame member
Figure 7 is a plan view of the control unit 40 20 as shown in Figure 1 limits the lowering of
the rear end of the scale beam.
viewed from the upper left hand side of the ap
paratus as shown in Figure 1;
The load support comprises a top cross-piece
35 which rests upon the scale beam pivots 32.
Figure 8 is a side elevation of the control unit,
with parts broken away;
Depending from cross~piece 35, there are hollow
Figure 9 is a section on the line 9~9 of Fig 45 supporting columns 36. The lower ends of the
ure 8;
columns have attached thereto a bracket 37 to
Figure 10 is a
which a U-shaped member 38 is pivoted at 39.
Figure 9;
Figure 11 is a section on the line H—|I of
Figure 10;
Figure 12 is an isometric view of certain of
the operating rods and levers;
Figure 13 is a detail view of part of the clutch
Figure 14 is another detail view of the clutch
The U-shaped member 38 has attached thereto
a bag shield 40 adapted to surround the sides
and rear of a bag being ?lled upon the appa
ratus. A spring 4| normally holds the shield
in upright position, as shown in Figures 1 and 2.
A discharge pusher rod 42 is supported at its
front end upon a roller 43 and contacts shield
40, being operated to tilt the shield and discharge
the bag in a manner which will be described later.
lever 94 pivoted at 55 and connected at 96 to a
The bracket 31 has attached to the rear side
?attened portion 81 of the gate controlling rod
thereof an arm M which is connected to a por
tion of the frame by a check rod 45 which oper
At the rear lower end of rod 21, there is a
strong spring 98 which is compressed when cam
ates parallel with the portion of the scale beam
91 forces lever 94 to the left as viewed in Figure
between pivots 28 and 32 so as to keep the load ‘ill 18, for example. This forcing of the rod 21
supporting rods 36 in upright position.
downward and to the left opens the gate and al
Beneath cross-piece 35, there is an adjusting
lows material to be discharged by the propeller
cross-piece 58 which may be raised or lowered
to the ?lling spout into a bag that has been pre
by a screw 5i operable by a handle 52. The ends
10 viously placed thereon.
of cross-piece 58 work in slots in hollow rods 36
In order to prevent entrance of dust into the
and have attached thereto rods 53 which are
housing of the control unit. a boot 99 of rubber
within the hollow tubes 39. The lower ends of
or the like is attached at one end to the housing
rods 53 have attached thereto, through slots in
and at the other end to rod 21.
tubes 35, a bracket 54. A bottom support 55 for
At the upper end of lever 94 there is provided
the bag is pivoted to bracket '54 at 56 (see Figure
a roller I88. When the lever is moved to the left
3). The rear of the bottom support 55 is pro
as shown in Figure 10, a latch I8l drops down
vided with a lug 51 which normally rests upon
ward and a tooth I82 of the latch engages the
the bracket 54 and maintains the bottom sup
roller. The latch is pivoted at I83. Mounted
port in the position in which it is shown in Fig
upon the same pivot there is a trip arm I84 which
ure 1.
extends upward, as shown in Figures 1 and 2.
A cross-piece 58 is secured at 59 to tubes 38.
Attached to the weight carrier 38 there is a
The ?lling tube 25 is secured to and supported
downwardly extending arm I85 having at the
by cross-piece 58.
end thereof an adjustable screw I86 in position
Extending forward from the cross-piece 58,
to contact the end of trip arm I84 when the
there is an arm 88. Bag clamp BI is pivoted at
weight end of the scale is raised and swings to
62 to arm 68. The clamp is provided with a tail
the left, as viewed in Figure 1. It will be seen
piece 63 to which there is attached a spring 54
that when the weight moves about fulcrumv29,
which normally presses the clamp down towards
the movement of screw I86 will be more nearly
the ?lling tube.
horizontal than vertical and so will engage the
Mounted on the front of the hopper, there is a
end of trip arm I84 and raise latch I8I against
bracket 65 (see Figure 1) to which there is piv
the tension of spring I81.
oted a clamp releasing lever I58 (see Figures 1, 3
In the normal operation of the machine, after
and 6). On the end of lever 65, there is a roller
the gate has once been opened and latched in
61 in position to engage the tail piece 63 of the
the open position by the means just described, it
bag clamp. An arm 88 extends from lever 88
remains open until the bag is ?lled sufficiently
and is ‘operated by a rod 69, the movement of
to cause movement of the scale beam, resulting in
which is controlled in a manner to be described
movement of arm I84 to release the latch. How
ever, in order to close the gate promptly in case
Also mounted upon the same pivot in bracket
of any emergency where the bag was not being
65 there is a trip handle 18 from which there ex
properly ?lled, there is provided a manual means
tends an arm 1I engaging a connecting rod 12,
for releasing latch I8I at will. Beneath the right
Fig. 5. The lower end of the connecting rod is
end of the latch. as viewed in Figure 10, there is
provided with a fork 13 which straddles a pin in
an arm I88 on a rockshaft I89. Normally the
a trip arm 14 on the control unit housing 15. A
arm I88 is held in the position in which it is
spring 15 normally pulls arm 14 to the right, as ‘
shown in Figure 10 by means of a spring II8.
viewed in Figure 1, against an adjustable stop 11.
Rockshaft I88 extends outside of the control unit
Connecting rod 12 is provided with a bend 18
housing and .has mounted thereon outside the
for a purpose which will be described later. The
arm 14 is mounted upon a shaft 19 extending
housing a stop arm III and an actuating arm
IIZ, Fig. 8. A screw H3 is mounted in the bend
into the control unit housing and operable to trip
18 of rod 12. Normally trip handle 18 at the
the control clutch, as will be described later.
A suitable source of power 88 is provided to
drive a belt or chain 8 I, which operates a sprocket
82 upon a shaft 83 mounted in the housing 15
(see Figures 1, "I and 9). Rigidly mounted on
shaft 83 within the housing there is a toothed
clutch wheel 84 (see Figure 13). Mounted loose
upper end of rod 12 would remain in the position
in which it is shown in Figure 1 due to its own
weight, but there is provided also in bracket 95 a
compression spring II8 which insures that nor
mally the fork 13 will rest in the lowest position
permitted by arm 14. However, as hereinafter
described, when it is desired to close the gate or
1y upon shaft 83, there is a cam carrier or drum
shut-off slide in an emergency, trip handle 18
85. A clutch pin 88 is mounted in the cam car—
may be raised sufficiently to operate arm I I2 and
rier 85 and is oscillatable so that its ?attened
rockshaft I89 so as to lift the end of latch I8I.
end 81 may be engaged with or disengaged from
In Figure 12, there is shown the relation of a
the toothed wheel 84. The opposite end of pin
number of the operating parts free from the ac
86 is provided with an arm 88 normally urged by
tuating means so that their connections ‘may be
a spring 89 into clutch-engaging position. On
more easily understood. It will be seen from
the end of shaft 19, mentioned above, there is a
examination of this ?gure that when arm I84 is
stop member 98. When the parts are in the po
moved in the direction indicated by arrow III by
sition in which they are shown in Figures 1 and
the operation of the scale beam, latch IN is
13, the stop member 98 engages arm 88 and os
moved in the direction indicated by arrow I I5 and
cillates pin 86 so as to disengage the clutch, It
this allows lever 94 and gate controlling rod 21
will be seen that when trip handle
to be moved in gate~closing position by spring 99
the shaft 19 is oscillated sufficiently to release
in the direction indicated by arrows IIS and I I1.
arm 88 and allow the clutch to become engaged.
When the clutch is allowed to close by move
Cam carrier 85 is provided with a cam 9|,
ment of trip handle 18 in the manner described
which upon movement of the cam carrier, en
above, the drum or cam carrier 85 will continue
gages a roller 92 on an arm 93, attached to a
to move until arm 88 encounters a timing stop
I20 on the end of a pin I21 which is mounted in
an arm I22. On the other end of pin I.2I there
I66 into notch I62 when the drum reaches the
second stop position.
cam member I21 having therein a groove I28.
It is believed that the operation of the appa
ratus will be fairly obvious from the foregoing
description, but for convenience the entire cycle
may be brie?y reviewed.
rI‘he apparatus being in the stop position, as
indicated in Figure 13, the shut-on slide or gate
A forked lever I29 is fulcrumed at I30 and has
pins I3I entering the groove in cam I2'I. Lever
threaded upon the ?lling spout 25. Thereupon,
is an arm I23 carrying a cam roller I24. An
other arm I25 on the end of pin I2I is connected
to a spring I26 which urges the ‘pin in a direc
tion to move roller I24 towards shaft 83. Slid
able longitudinally of shaft 83 there is a conical
26 will be closed.
The valve of a valve bag is
the source of power 80 being effective, the oper
ator moves trip handle ‘I9 downward to the dot
‘I29 also has an operating arm I32 carrying a roll
er I33. An arm I34 is mounted on the sleeve I35
which carries lever 94. A cam I 36 on the end
of arm I34 engages the roller I33 when the arm
ted line position indicated in Figure 1 whereupon,
through the connecting rod ‘I2 and arm ‘I4, the
shaft 79., Figs. 1 and 13, is rocked so as to cause
I 34‘ is moved in the direction of the arrow I3‘I
on Figure 12, at the same time that lever 94
is moved in the direction of the arrow H6.
A sleeve I38 is provided between shaft 83 and
the conical cam I2? and arm I22 is mounted
upon the inner end of this sleeve I38. The sleeve
extends outside of the housing of the unit con
trol and has attached thereto an arm I39 which
is held in adjusted position by a pin I 49 which
may enter any one of a plurality of holes I4I ar
ranged in an arc on the outside of the housing.
In this way the stop I20 may be adJusted through
approximately 240° to stop the cam drum at the
desired time after movement thereof has been
resultant engagement of the clutch pin end 81
With the rotating clutch wheel 84. When the
trip handle Til is moved down as described above,
it is held only momentarily and, therefore, it im
mediateiy returns to the full line position thereof
shown in Fig. 1. This happens by reason of the
fact that the spring 16, which biases trip arm 14
in a clockwise direction against the stop 11, is
stronger than the spring II 8. If desired, a
spring, not shown, may be provided to assist
spring 16 in performing the function stated.
initiated ‘by the rocking of shaft ‘I9.
the stop 1‘! as last described, the stop 90 returns
A pin I 45, Fig. 10., extending through the end of '
rod 69 connects that rod to a clamp-operating
to its normal position where it is effective to dis
continue operation of the unit after completion
of one cycle of operation thereof.
shaft I47. Another arm I48 on the rockshaft
carries a roller I49 which is engaged at the proper
time by a cam I59 on the cam carrier. The cam
I5!) is so positioned upon the cam carrier that it
movement of the carrier 85 in a clockwise direc
Upon the engagement of the clutch, rotative
tion, Fig. 13, is initiated with the result that cam
I59 moves from beneath rolier I49, as will be
apparent from Figure 13, this allowing the move
ment of arm I49 in the direction indicated by
arrow I51 in Figure 12, and the consequent low
ering of rod 69 (which is connected to arm I46,
Fig. 10) and arm 66, Fig. 1. As a result, the
spring 94 becomes e?ective to cause the clamp
E! to clamp the bag upon ?lling spout 25. Sub—
stantially simultaneously cam 9| moves roller 92
pletion of a cycle of movement of the unit when
arm 88 again engages stop 90. Arrow I5I on Fig
ure 12 indicates the movement of the arm I46
and consequently movement of rod 69 when the
roller I 4.9 is not in engagement with cam I50,
which is the greater part of the time. When the
arm I46 is in the position indicated by dotted
lines in Figure 12, it will be readily seen that the
and lever 94 so as to move the slide controlling
clamp controlling member?? will be lowered suf
rod 27 downward and compress spring 98 with
?ciently to allow spring 94 to close the clamp
upon a bag positioned on the ?lling tube 25.
At the rear end of push rod 42, there is a fork
I52 connected to a rock arm I53 extending from
rockshaft I54. Upon the other end of the rock
shaft, there is an arm I55 carrying a cam roller
I 56. This may be operated by a separate cam
on the cam carrier if desired, but in the con
struction shown, it is arranged to be operated by
the same cam 9I which operates lever 94. It will
be readily seen from a comparison of Figures 12
and 13 that after the clutch has made one com
plete revolution and is in the stop position, cam
9I has operated upon roller I56 and is in position
to move roller 92 immediately upon closing of
the clutch. A spring I51 normally retracts
pusher rod 42 and holds the rock arm I 53 against
a stop I58 (see Figure 9).
The cam drum is held in proper stop position
While not engaged by the clutch by the follow
ing means. A bell crank lever I69 carries on
one arm a roller I6! adapted to enter a notch
I 62 in the cam drum (see Figure 10) .
The other
end of the bell crank lever is connected to a spring
I 63 which holds the roller against the drum with
su?icient force to hold the drum against acci
dental movement. On arm I22 there is a link I64
carrying a roller I65 which is pulled by a spring
the result that the gate 25 is opened.
When cam
94 actuates ‘lever 94 as last described, the latch
I9I coacts wth the roller I90 thereof to retain
said lever 94 in the position shown in Fig. 10
after movement of the cam 9| beyond roller 92.
The material is then at once discharged into the
bag by the constantly rotating propeller 23.
While the material continues to be discharged
into the bag, the cam drum continues movement
the stop I29, Fig. 13, to disengage the clutch tooth
end 8‘! from the clutch 84. As a result, the cam
- carrier 95 is disconnected from the clutch wheel
94 and said cam carrier 95 becomes stationary.
Normally, the material will be fed into the bag
until it counterbalances the scale weight su?i
ciently to swing screw I06 to the left, as viewed
in Figure l, to operate trip arm I04 and thereby
release the gate controllingr rod 21 for closing
movement in response to the action of spring 98.
This action occurs by reason of the fact that op—
eration of the trip arm I94 raises the latch IOI,
. Fig. 12, whereby the lever 94 swings clockwise,
Fig. 12, with resultant movement of said rod 21
as described to close the gate ‘26. Member I34
moves when the lever 94 swings clockwise as de
scribed immediately above, Figs. 10 and 12, and
cam member I36 engages roller I33 to move the
?lling tube while the bottom of the bag rests upon
the horizontal bag support. After the bag moves
far enough so that its center of gravity is in
front of pivot 56, the bottom support tilts with the
moves free of the arm 88 of the clutch pin 80 and
bag and allows the bag to slide off.
the clutch tooth end 0'! reengages the toothed
The pendulum action of the scale results in an
wheel 84. The cam carrier 85 now resumes ro
even and controlled movement of the scale beam
tation with the toothed wheel 84. During this
as the predetermined weight of material is fed
period, air escapes from the ?lled bag to avoid the
into the bag, and the relatively great distance of
puff of dust-laden air.
10 trip-adjusting screw I06 from fulcrum 29 makes
Thereafter, the cam carrier 85 continues to
possible a very ?ne adjustment of the trip so that
move with the toothed wheel 84 until it is discon
the feed may be shut off at exactly the chosen
nected therefrom in the manner hereinafter de
position of the scale beam.
scribed and, preferably, the timing is such that
The gate or cut-off slide may be of any usual
an appreciable length of time elapses before such
or desired type, but the disclosed construction is
disconnecting operation is effected. Eventually,
preferred. It will be noted that the upper end of
conical cam I21 from right to left, Fig. 11. The
latter engages roller I24 whereby, through the de
scribed mechanical connection, the stop I20
however, the cam I50 engages roller Hi9 and,
the slideway is closed to the outer air, but is open
through the described mechanical connection, the
arm 66 is moved upwardly, Fig. 1, to thereby open
the bag clamp BI against the action of spring 64'.
Immediately thereafter, the cam 91 engages roll
‘er I56, Fig. 10, which effects the rocking of arm
at I58 into the propeller housing. This prevents
I53 in the direction indicated by arrow I01 on
Figure 12 or clockwise, Fig. 10, whereby the rod
42, Fig. 1, is actuated to tilt the shield 40 and
discharge the ?lled bag therefrom in the manner
hereinafter described. After completion of the
escape of dust from the slide way into the open
air, but at the same time allows the edge of the
gate to force any dust before it from the slideway
back into the housing, so that movement of the
slide is not blocked by material packed in the
end of the slideway. The angle of opening I68 is
such that the propeller does not pack material
tightly in that opening.
While one embodiment of the invention has
foregoing, the arm 88 of clutch pin 86 moves into
been described in considerable detail, it will be
engagement with stop member 90 (which was re
understood that various changes may be made
turned to normal position in the manner de
within the scope of the appended claims. For
scribed above) to disengage the clutch pin 86 30 example, compressed air in the cylinder enclosing
from the toothed Wheel 84. As a result, rotary
spring 90 could be used instead of the spring to
movement of the cam carrier 85 ceases and one
close the gate, and other obvious changes might
cycle of operation is completed. At any desired
be made. Also, while the entire combination as
time, the trip handle '10 may be moved momen
. disclosed has been found to work together advan
tarily upwardly, against the action of spring H0, CG LI tageously to constitute a desirable ?lling ma
from the full line position thereof shown in Fig.
chine, it will be understood that a number of the
1. When this is done, a portion of the bend 18
features might be incorporated separately in ?ll
of rod 12 engages arm “2 to move shaft I09 and
ing devices of the same general type and retain
arm I08 in a clockwise direction, Fig. 10. As a
some of their advantages.
For example, the arrangement is advantageous
result, latch |0I is raised, Fig. 12, with resultant
closing of the gate 26 in the manner hereinbefore
whereby trip handle ‘I0 is held normally in a mid
described. The last described operation of trip
dle position by spring ‘I5 holding it up as far as
handle 10 may be effected upon occurrence of
permitted by stop 11 and spring H8 preventing
some abnormal operation, such as the tearing of a
its unintentional movement upward from that
position, since this enables the intentional down
bag, etc.
By swinging arm I39 to the desired position
ward movement of the handle to start the ?lling
and inserting pin I40 into the proper hole MI, the
operation while the upward movement of the
handle may be employed as an emergency stop.
distance that the cam drum travels, after the
While this obviously cooperates with other dis
clutch is closed by movement of the scale beam,
can be adjusted. Where a large amount of air is s closed features, the idea might be employed with
fed into the bag along with the ?lling material,
quite different operating mechanisms. Other
a delay between the closing of the cut-off slide
similar examples will be clear in view of the ap-'
or gate and the discharge of the bag allows the
pended claims.
air to escape gradually before the bag is removed
What I claim is:
1, In apparatus for ?lling and discharging re
from the ?lling tube. This tends to avoid the i
puff of dust-laden air that would otherwise be
ceptacles, means for feeding material to a re
discharged through the valve opening upon re
ceptacle, a one-revolution clutch, manual means
moval of the ?lling tube from the opening. The
for closing the clutch, means responsive to the
mechanism disclosed permits the interposition of
operation of said clutch for initiating the feed
su?icient delay, but also permits shortening the
of material to the receptacle, adjustable means
interval to what is necessary or desirable under
for opening the clutch during the course of its
the particular circumstances.
The particular mounting of the bottom support
for the bag allows of the accurate adjustment of
the height of the support, without interrupting
one revolution, weighing means, means respon
sive to the action of said weighing means for
stopping the feed of material to the receptacle
and reclosing the clutch, and means actuated and
the operation of the ?lling device, to give the de
gree of support desired, both during ?lling and
discharging. This positions the support at eXactly the right distance from the ?lling spout to
give the necessary support to obviate tearing of
the top of the bag where it is threaded onto the
?lling tube and at the same time avoid holding
timed by the clutch for discharging the receptacle
the bag bottom so high that there is any inter
ference with proper ?lling. When shield 40 is
closing the clutch, connections opening the gate
near the completion of the one revolution of the
2. In valve bag ?lling apparatus comprising
a ?lling tube adapted to enter the valve of a bag
and a gate controlling the flow of material to the
tube, a one—revolution clutch, manual means for
by the initial movement of the closed clutch, ad
moved by pusher 42, it shoves the bag off of the 75
J'ustable means for
lected point in its revolution,
urging the gate toward closed position, a latch
for holding the gate open and means releasing
the latch in response to weighing movement of
said device, a one-revolution clutch, manual
the gate
dered operable by the clutch near the completion
of its one revolution to discharge the bag.
clutch, connections open- .
3. In valve bag ?lling
ing the gate by the initial movement of the closed
clutch, adjustable means opening the clutch at a
selected point during its revolution, means ren
dered operable by the closing of the gate for re
closing the clutch, and means rendered operable
by the clutch immediately before the conclusion
of the one revolution of the clutch to discharge
point during
its revolution, means controlled by the Weighing 15
the bag from the tube.
5. In valve bag ?lling apparatus comprising a
device for closing the gate, means controlled by
the Weighing device for reclosing the clutch, and
comprising a ?lling tube
valve of a bag, a Weighing device for Weighing a
bag being ?lled through the ?lling tube, a gate for
revolution, means
reclose the clutch when the
bag is ?lled, and to
to the clutch re
leasing the clamp connections
before the con
clusion of the one
shutting olT ?ow of material to the tube, a spring
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