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Патент USA US3086438

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April 23, 1963
J. Y. ALBERTSON ETAL
3,086,428
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
9 Sheets-Sheet 1
April 23, 1963
3,086,428
J. Y. ALBERTSON ETAL
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
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9 Sheets-Sheet 2
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April 23, 1963
J. Y. ALBERTSON ETAL
3,036,428
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20. 1960
9 Sheets-Sheet 3
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April 23, 1963
J. Y. ALBERTSON ETAL
3,086,428
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
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April 23, 1963
3,086,428
J. Y. ALBERTSON ETAL
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
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9 Sheets-Sheet 5
April 23, 1963
J. Y. ALBERTSON ETAL
3,086,428
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
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9 Sheets-Sheet 6
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April 23, 1963
J. Y. ALBERTSON ETAL
3,085,428
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
9 Sheets-Sheet '7
April 23, 1963
J. Y. ALBERTSON ETAL
3,086,428
BOX-WRAPPING SYSTEM FOR LoosE-wRAP WORK
Filed May 20, 1960
9 Sheets-Sheet 8
April 23, 1963
J. Y. ALBERTSON ETAL
3,086,428
BOX-WRAPPING SYSTEM FOR LOOSE-WRAP WORK
Filed May 20, 1960
9 Sheets-Sheet 9
United States Patent
" ice
3,086,428
Patented Apr. 23, 1963
1
2
3,086,428
on the path displaced in the direction of travel from a
transfer station. The system also includes a wrapper
Jonathan Y. Albertson, Abington, Ludwig H. Lange,
Rockledge, Leslie E. Lord, North Willow Grove, and
Roy Schempp and James W. Steck, Philadelphia, Pa.,
below the box conveyor, the wrappers having unset ad
BOX-WRAPPING SYSTEM FOR LOOSE
WRAP WORK
assignors to FMC Corporation, a corporation of Dela
ware
Filed May 20, 1960, Ser.‘ No. 30,672
12 Claims. (Cl. 93—54)
This invention relates to an automatic box-wrapping
system and has for an object the provision of an im
conveyor for cyclically feeding wrappers in succession
hesive along the edges of their upper surface. Extending
over the wrapper conveyor at the transfer station is
means for interrupting the movement of the wrappers.
The system further includes reciprocating means movable
between the predetermined location and the transfer sta
10 tion for moving the boxes in succession over and down
wardly into spaced register with the corresponding wrap
pers, and transfer means movable transversely of both
of the conveyors and the transfer station for transferring
proved box-wrapping system particularly suited for
in succession each ‘box and wrapper in registered spaced
“loose-wrap” work. In the box-making art, the term
“loose-wrap” is used to designate those boxes whose 15 relation from the transfer station to a wrapping station.
The system further includes means at the wrapping sta
wrappers are secured thereto only on the portions of the
tion for bringing the wrapper into contact with the box
wrapper which extend inside of the box. The remaining
and applying the adhesive-coated portions of the wrapper
portions of the wrapper cover the exterior of the. box
to the box in completion of the wrapping thereof.
but are “loose” with respect to it. For “loose-wrap”
In accordance with ‘a further aspect of the invention,
work, the adhesive pattern on the wrapper is such that 20
the reciprocating means for moving the boxes into reg
the adhesive is only applied around the edges of the
ister with corresponding wrappers is of the swinging
wrapper and not in the center of the wrapper. For
plunger type which is positioned to one side of the
boxes in which all portions of the wrapper adhere to
wrapping station, thus permitting free access to the box
.the box, such boxes are known in the trade as “tight
wrap” work and their wrappers are provided with an 25 ,‘wrapping machine for adjustment or maintenance and
for operation of the system in connection with tight
overall coat of adhesive.
wrap work. The boxes are not placed in contact with
An example of a full automatic box-wrapping system
the wrapper at the transfer station, but instead are placed
for tight-wrap work is disclosed in William F. Andresen,
on supports which extend over the transfer station at
Jr., et al. US Patent No. 2,867,158. The present in
vention is an improvement upon automatic systems of 30 a height above the surface of the wrapper. Before the
box is placed on the supports in registered position over
that type as the present invention enables both loose
the wrapper, the wrapper is positioned both lengthwise
wrap and tight-wrap work to be done on the same
and sidewise ‘by register ?ngers. The box and wrapper
system. The present invention, in certain respects, is
are picked up in their registered spaced relation at the
also an improvement on systems of the type disclosed in
application Serial No. 30,648 ?led concurrently here 35 transfer station and during'the transfer to the wrapping
station, the wrapper is raised'or elevated towards the
with by Roy Schempp, which issued as Patent No. 3,
bottom of the box to insure that the wrapper will clear
045,561, dated July 24, 1962.
the platen of the wrapping machine. Upon arrival of
In general, loose-wrap work provides a better-appear
the box and wrapper at the wrapping station the wrapper
ing ?nished box and at a lower manufacturing cost as
less adhesive is required on the wrapper. In view of 40 is again lowered to its original position as at the trans
fer station and thus when the wrapper is applied to the
box, it is precisely centered therewith and insures per
foot accuracy in wrapping. Such accuracy cannot be
be adapted for producing both loose~wrap and tight
accured when the box is placed directly on the wrapper
wrap work.
The present invention is particularly concerned with 45 at the transfer station prior to being transferred to the
wrapping station as the box plunger may cause dis
the loose-wrapping of “set-up boxes” with predetermined
placement of the wrapper from its registered position.
steps being taken to insure that the wrapper, regardless
There are various novel features of the. loose-wrap
of shape and material, is in precise register with the
registering devices and the transfer mechanism which
box from the time the box and wrapper leave the trans
fer station until the adhesive portions of the wrapper are 50 all contribute'to the automatic registration and assembly
of the set-up box and its associated wrapper as will
secured to the box at the wrapping station to produce
‘hereinafter be pointed out and described more in detail.
a completed loose-wrap box. The term “set-up” is used
'For a more detailed disclosure of the invention and
in the art to designate box blanks which have been
‘for
further objects and advantages thereof, reference
formed with vertical walls and the corners formed by
may be had to the following description, taken in con
the ends of adjacent walls having stays or other suitable 55 junction
with the accompanying drawings, in which:
attaching means secured thereto for holding the walls in
FIG. 1 is a side elevation of a box-wrapping system
upright or vertical position.
embodying the present invention;
In accordance with the present invention, there is pro
‘FIG. 2 is a top plan View of FIG. 1;
vided an automatic box-wrapping system particularly 60
FIG. 3 is a perspective view of the transfer station
suited for the loose~wrapping of set-up boxes. This sys
and box-wrapping station of the system shown in FIGS.
tem includes a box conveyor for cyclically moving set
1 and 2;
up boxes along a path with stop means for interrupting
FIG. 4 is a front elevation of the end-registering mech
the movement of the boxes at a predetermined location
anism as viewed in FIG. 1;
the fact that automatic box-wrapping equipment is rela
tively expensive, it is desirable that the same equipment
3,086,428
3
4
FIG. 5 is a perspective view of the drive mechanism
for the side register;
FIG. 6 is a top plan view of the side register of
?rst registering device R, and is adapted to lift the box
FIG. 3;
veyor and move it over and down onto box supports
FIG. 7 is a sectional view, taken along the lines 7—-7
in FIG. 6;
which maintain the box B in spaced register with the
leading wrapper W which has previously been coated with
a predetermined adhesive pattern for loose-wrap work
strictly vertical-moving straight line plunger P of the
B off from the end of the extension BC, of the box con
'FIG. 8 is a side elevation as viewed from 8-8 in
FIG. 7;
and fed by cooperation of the gluer G and the suction
FIG. 9 is a top plan view of the box transfer device;
vconveyor C to the transfer station.
FIG. 9A is a fractional sectional view of the box 10
Prior to deposit of the box B at the transfer station,
transfer arm in FIG. 9;
the wrapper W is registered both longitudinally and trans
FIG. 9B is a fractional sectional view of the operating
versely of the transfer station to insure that the center
mechanism for the box transfer;
lines of the wrapper W will be precisely in alignment with
FIG. 10 is a front elevational view partly in section
the center lines of the box B when it is registered on the
of FIG. 9;
15 supports above the wrapper W at the transfer station.
FIG. 11 is a top plan view of the box and wrapper
Thereafter the registered ‘box and wrapper in the ?at
transfer mechanism;
are moved from the transfer station at the end of the
FIG. 12 is a sectional view taken along the lines 12-12
suction conveyor C to the wrapping station of the box
in FIG. 11; and
wrapping machine M.
‘FIG. 13 is a schematic view of the electrical system 20
The box-wrapping machine M is of the type shown in
for stopping the wrapping machine in the event no boxes
U.S. Patents Nos. 2,074,561 and 2,144,338 and includes
are delivered to the transfer station.
an automatic transfer mechanism generally of the type
As mentioned above, the present invention is an im
described in Lange et al. Patent No. 2,705,905 with cer
provement on the automatic box-wrapping system dis
tain improvements as hereinafter described. The main
closed in Andresen, Jr., et al. Patent 2,867,158 to enable 25 cam 12 is attached to a vertical shaft 13 which is driven
the tight-wrap system disclosed therein additionally to be
from a motor M1, FIG. 13, through a clutch. As de
able to perform loose-wrap work. Referring to FIGS.
scribed in the aforesaid Patent 2,867,158, the operations
1 and 2, it will be seen that in many respects, the present
of the stayer S, the gluer G and the suction conveyor C
box-wrapping system 10 is generally similar to the auto
are synchronized with the operation of the box machine
matic box—wrapping system disclosed in said Andresen Jr. 30 M by means of electromechanical connections. During
et al. patent. As in the case of the aforesaid patent, the
present system includes as components thereof a stayer S,
a ‘box conveyor BC, a gluer G, a suction conveyor C for
the wrappers, a box-registering device R and a box-wrap
each cycle of the box-wrapping machine M, the main
cam 12 makes one complete revolution and the form
block F, FIG. 3, comprising an upper form and a lower
form, is moved from an upper position downwardly in a
ping machine M. 'In addition, the present invention in— 35 path adjacent various sheet-applying tools and then back
cludes a second box-registering station R2 and an exten
to its original position. During such movement, the
sion BC1 for the box conveyor extending between the
wrapper and the bottom of the ‘box are clamped between
two box-registering stations R and R2. All of these com
the lower form block and a platen. The movement of
ponents are ‘cyclically-operated in timed relation. The
the form block F and the relative movements with re
various components of the present box-wrapping system
spect to each other of its components are effected by
10 which correspond to those in the aforesaid patent are
levers having cam followers which ride in cam grooves
of similar construction and operation and thus it is not
in the main cam 12, all as well-understood in the art.
believed necessary to elaborate upon their details here as
The various sheet-applying tools, including side rolls,
their description is hereby incorporated herein by refer
45
end rolls, marginal turn-in tools and pressure blocks are
carried by four tool slides adjustably connected to a table
of the machine M and each is provided with operating
ence thereto.
As shown in FIGS. 1 and 2, box blanks b are fed to
the staying machine S from a stack of blanks b. The
members which are controlled from a cam on the lower
staying machine S is shown as a quad stayer and thus
end of the vertical shaft 13. During each cycle of the
the four corners of the box are stayed concurrently. The
machine M the various sheet-applying operations of the
box blanks b thus automatically are transformed by the 50 tools are effected, all as more fully shown and described
stayer S from blanks b in the flat to stayed set-up boxes
in aforesaid Patent No. 2,074,561. Referring to FIGS.
B. As they leave the staying machine S, the set-up boxes
1 and 2, the stayed boxes B are forwarded in succession
B are delivered in succession from the staying machine
from the box conveyor BC to box-supporting structure
onto the box conveyor BC and continue in a straight line
201 disposed beneath the plunger P of the ?rst registering
beneath the registering device R. The wrappers are fed 55 device R. The registering device R and associated parts
to the gluer G from a stacker ST as described in the
of the present system ‘10 are the same as those illustrated
aforesaid patent to Andresen, Jr, et al., No. 2,867,158.
in FIG. 8 in the aforesaid Patent 2,867,158. For pur
When doing tight-wrap work, the gluer G is adjusted to
poses of clarity, the same reference characters are used
apply an overall adhesive coat to the wrappers W before
herein to designate corresponding parts in Patent 2,867,
they are placed on the suction conveyor C. The plunger 60 158 and particularly in connection with those shown in
P at the ?rst registering station R forces a box B down
FIG. 8 of that patent. For tight-wrap work, the box
wardly onto the adhesive-coated surface of the wrapper
supporting structure 201 is provided with box stop mem
W. Thereafter the assemblies comprising an adhesive
bers for aligning the set-up boxes B beneath the plunger
coated wrapper in the ?at and set-up box registered there
65 P. One of these stop members is provided with a suc
on are moved step-by-step by the suction conveyor C to
a transfer station opposite the box-wrapping machine M,
as described in the aforesaid patent.
For loose-wrap work, the set-up boxes do not stop
beneath the ?rst registering device R, but instead move
therebeyond and onto the extension ~BC2 of the box con
veyor until the leading box arrives at a position adjacent
the transfer station where it is adapted to receive the
plunger P2 of the second box-registering device R2. The
plunger P2 is of the swinging type, as contrasted with the
tion connection, such as a suction line 32 connected to
a vacuum pump 33, the latter also providing suction for
feeding the wrappers W to the gluer G. As disclosed in
FIG. 8 of said Patent 2,867,158, the suction line 32 is
connected to a diaphragm device which is adapted to
withdraw a pivoted latch member from its latching en
gagement with a pivoted arm which forms part of the
operating mechanism for the plunger P in the registering
device R.
For loose-wrap work, the stop members on the box
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supporting structure 201 are removed and plunger P of
avoid wear on the upper surface of the belt 39‘ but to
the registering device R is rendered inoperative.
be su??ciently close thereto to engage the leading end
of the wrapper W and stop it in registered position at the
The
latter is accomplished by means of a three-way valve
V1 which is inserted in the suction line 32 between the
vacuum pump 33 and the diaphragm device shown in
FIG. 8 of said Patent 2,867,158 but not shown in the
transfer station. As may be seen in FIGS. 3 and 4, the
end-registering device ER includes a pair of spaced ?ngers
to disconnect the diaphragm device with respect to the
40, the forward ends of which are adapted to extend over
the surface of the wrapper W. The bottoms of the ?ngers
‘40 are provided with small, vertical shoulders 40a which
vacuum pump 33 and to connect a suction line 20‘, FIG.
are adapted to engage the leading end of the wapper W.
present application. The three-way valve V1 is adapted
1, with the pivoted box ‘transfer plunger P2 at registering 10 The shoulders 40a and the lower surface 40b of ?ngers
station R2. As the boxes B move onto the box-supporting
structure 201, they are pushed thereacross and onto the
40 are made from an adhesive-resistant material, such
for example as a polymer of tetra?uoroethylene avail
box conveyor extension 1301 by the following boxes
able on the market under the tradename “Teflon.” Each
of the ?ngers 40 is supported by an L-shaped block 41
which are being fed by the box conveyor BC. The box
conveyor extension BC1 has been illustrated in the form 15 which in turn is supported by an adjusting screw 42, the
of a shelf formed by an inverted channel member 21.
latter being carried by a main block 43 and having an
adjusting knob 42a. The adjusting knob 42a is adapted
Extending over the top of channel 21, FIG. 3, are spaced,
adjustable side guides 22 which are adapted to guide the
to move ‘the ?ngers 40 lengthwise of the conveyor belt
boxes B along a predetermined path. The side guides 22
39 for precise control of the end position of the wrapper
are adjustable to accommodate boxes of di?erent widths, 20 W at the transfer station. The main supporting blocks
such adjustment being provided by the support members
43 are pivotally carried by a rod 45 which extends trans
23 which extend through cooperating members 24 and
versely of the suction conveyor C. To control the pressure
of the ?ngers 40, the rod 45 is also provided with mem
are locked in place by set screws.
bers 47 which are connected with the L~shaped blocks
The boxes B are pushed along over the extension box
conveyor BC1 until they engage the box stop 26 which is 25 ‘41 and ?ngers 40 by means of adjusting screws 48%.
The adjusting screws 48! are provided with a compression
positioned at the end of the extension box conveyor BC1,
spring 49 which extends between the L-shaped block
FIGS. 3 and 13. Until the extension box conveyor BC1
box 41 and members .47. By adjusting the screws 48-, the
is filled with boxes, the suction to the box transfer plunger
pressure applied to the fingers 40 by means of springs 49
P2 is cut oif by means of a valve operated by a hand
can be controlled. When the adjusting knobs 42a have
lever 23, as later to be described. The suction conveyor
been moved to their desired position, the L-shaped block
C is cyclically-operated by manual control until the con
41 may be locked in position by means of lock screws 50.
veyor is ?lled with wrappers to which a predetermined
The rod 45 is supported by a bracket 52 which in turn
adhesive pattern has been applied for loose-wrap work
and the leading wrapper is adjacent the transfer station.
During this operation the lever 28 has been maintained
in position to prevent suction from being applied to the
plunger P2 so that the boxes B will not be transferred
is carried by a collar member 53 on a horizontal arm 54.
The collar 53 is provided with a set screw 55 to lock the
collar to the arm 54 at a location corresponding to the
length of the box to be wrapped. The rear end of the
arm ‘54 is provided with a pair of transverse pins 56‘ and
57 which are respectively supported by a pair of vertical
until a wrapper W is at the transfer station.
As may be seen in FIG. 13, the box stop 26 includes a
normally-closed switch 27 which is in series circuit with
the low side of a step-down transformer 30 and a nor
members 58 and 59, the lower ends of which are pivotally
connected at 60a and 60b to a support 62 disposed beneath
mally-closed switch 31 which is ‘adapted ‘to be opened
the suction conveyor C. It will be noted that the upper
end of vertical member 58 is provided with an open groove
by a cam 36 carried by the vertical shaft 13‘ of the box
58a of semi-circular shape, rather than a circular open
Wrapping machine M. The switch 31 is also connected
to a relay 37 having contacts 37a which in turn is con 45 ing, as in the case of opening 592: at the upper end of
vertical member of 59. This permits the horizontal arm
nected to the low side of the step-down transformer 30.
54 to be pivoted about its rear pivot 57 with the pin
The relay 37 is in circuit with a stop solenoid 38‘ which
56 moving to the upper position as shown in phantom
lines in FIG. 4 so that the pin '56 may be engaged with
To initiate a cycle, the wrapping machine M is tripped 50 a slot 61a in latch member 61 to hold the end register‘
in turn is connected to a circuit breaker 39 or a mechanical
trip lever for stopping the Wrapping machine M.
and cam 36 moves to open switch 31.
ER in substantially vertical position, thus permitting
At this time
switch 26 on the box stop is opened by the column of
access to the transfer station and to the box-wrapping ma
chine M. The suction conveyor is of the type disclosed
boxes B on the extension of the box conveyor BC1. The
transfer arm or plunger P2 picks up the leading box B
in the aforesaid Lange et al. Patent 2,705,905 and the
and moves it out of engagement with the switch 27 on 55 transfer end of said conveyor is pivoted so that it may be‘
raised for access to the wrapping machine. By pivoting
the box stop 26, thus allowing the switch to close. The
the end-registering device ER in the manner disclosed
transfer arm P2, FIG. 3, transfers the box B‘ to a position
in front of the wrapping machine M and starts to return
herein, the transfer section of the suction conveyor C may
to its position shown in FIG. 13. When the transfer arm , _ still be pivoted to provide access to the wrapping machine.
P2 is in a straight-up or vertical position, the switch 31 60 This is particularly desirable in the event a box or wrapper
is permitted to close. By this time the next box B on the
becomes jammed in the wrapping tools of the wrapping
machine.
box conveyor BC1 should have moved up against the box
Referring to FIG. 4, it will be noted that a solenoid 63
stop 26 and moved its switch .to open position. However,
if no box is present at the end of the box conveyor BC1, __ is carried on ‘the bracket 52. The plunger 64 of the
then switches 26 and 31 both will be‘ closed. This in turn 65 solenoid is connected to one end of an arm 65, the other
end of which is secured to the rod 45. The solenoid 63 is
will cause relay 37 to close contacts 37a, energizing the
energized by way of a switch 66 which in turn is con
stop solenoid 38 and to stop the wrapping machine M.
trolled by a cam '67 on the main shaft 13. When‘ the box
The step-down transformer 30' is employed to minimize
, wrapping machine is tripped to initiate a cycle of the
the shock hazard for the attendant of the machine.
system, the wrapper conveyor C moves a wrapper W
When the wrappers W arrive at the transfer station of
towards the transfer station and prior to its arrival
the system at the end of suction conveyor C, they are
thereat, the end register ?ngers 40 assume their lower
registered both lengthwise and sidewise as now to be de
position, as shown in FIG. 4. The leading end of the
scribed. The end-registering device ER extends over the
upper surface of the conveyor belt 39 (FIG. 3) and , wrapper W moves against the vertical shoulders 40a and
the forward movement of the wrapper W is stopped.
is spaced an in?nitesimal distance thereabove so as to
to
3,086,428
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8
Thereafter the transfer mechanism T (FIG. 3) of- the
endwise movement of the end register ER will be elimi
nated. For this type of operation, the end register ER
box-wrapping machine moves over the transfer station of
the wrapper conveyor C to grip a box B and a wrapper
W. As the transfer mechanism T moves the box and
wrapper to the wrapping station of the machine M, the
solenoid 63 is energized to withdraw the plunger 64 and
is so positioned with respect to the transfer station as to
compensate for the bounce-back of the belt. This ad
justment will be made by means of adjustment knob 42a
which in turn adjusts the position of the end register ?ngers
cause the arm 65 to pivot in a clockwise direction about
40 lengthwise of the conveyor.
the rod 45, thus causing the ?ngers 40 to be raised to a
To insure that the longitudinal center line of the
higher elevation above the surface of the belt 39‘ of the
Wrapper W is properly positioned at the transfer station,
Wrapper conveyor C. This is desirable, since at this 10 the present system is provided with a side register SR,
time the wrapper conveyor C is again advancing to move
as now to be described. Referring to FIGS. 6-8, it will
a wrapper toward the transfer station and during the ad
be seen that the side register SR includes a pair of regis
vancement of the belt 39, the belt tends to vibrate and
tering ?ngers 85 which are generally similar to the end
move its surface into engagement with the shoulders 40a
registering ?ngers 40‘ in that they include an end por
which are spaced closely thereabove. By moving the 15 tion which is adapted to extend over the wrapper W and
?ngers 40 a substantial distance above the belt 39 during
have depending therefrom a shoulder portion 85a which
a majority of the forward advancement of the belt, the
wear on the belt is minimized.
It is frequently di?icult to bring the conveyor belt 39
is adapted to engage the side edge of the Wrapper W.
These wrapper-engaging portions of the side register ?n
gers 85 preferably are provided with Teflon surfaces
to a stop without it bouncing back in the reverse direction 20 similar to ?ngers 40 so as to prevent the adhesive on the
of travel. This action of the belt causes the wrapper to
wrapper from building up thereon. The ?ngers 85 are
move with it and thus move out of proper register at the
provided at their rear ends with slots 85b through which
transfer station. To avoid this di?iculty, the end register
extend screws 87‘ which adjustably secure the ?ngers 85
ER is adapted to be adjusted to permit over-travel of
to carriage members 88. The carriage members 88 are
the wrapper on the belt and to re-register the wrapper by 25 pivotally carried at their rear ends by pins 89 which in
moving it in the opposite direction to the normal travel
of the belt. It will be noted in FIG. 4 that the vertical
turn are carried by adjustable mounting blocks 90‘. The
72, FIG. 5. The central pivot 73 for the double-ended
which is adapted to receive a compression spring 98. The
mounting blocks 90 are interconnected by a slotted bar
supports 58 and 59 are interconnected near their lower
91 which is slideably carried by a support 93 which ex
ends by a pair of links 69 disposed on opposite sides
tends beneath the suction conveyor C. The member 93
of the vertical members 58 and '59 and through which 30 extends through a ?xed suppont 94 which is secured by
pass pivot pins 58b and 59b. The links 69‘ are connected
screws 95 to a mounting block 96 which in turn is bolted
to an operating rod 70, the opposite end of which is pivot
at 97 to the side frames of the suction conveyor C, FIG.
ally connected at 71 ‘to one end of a centrally-pivoted arm
6. The member 93 is provided with a central slot 93a
operating arm 72 is supported on a portion of the frame 35 slot 93a and the member 94 along with bottom plate 94a
for the box-wrapping machine at a location beneath the
and end plate 941) cooperate to form a housing for the
suction conveyor. The opposite end of arm 72 is con
compression spring 98. Connected to the underside and
nected by way of -a link 74 to an arm 75 connected to
at the left-hand end of member 93 as viewed in FIG. 7
the lower end of a vertical shaft 76, the upper end of
is an L-shaped bracket 100, the vertical portion 100a
which is secured to an arm 77. The arm 77 is provided 40 of which is provided with an adjustable stop 101 which
with a cam roller 78 which is adapted to engage a cam
is adapted to engage the cross bar 91. The horizontal
79 carried by the main cam 12 of the box-wrapping ma
portion of L-shaped member 100 is secured to member
chine M. The shaft 76 is mounted in vertical position
93 by screws 102. At the right-hand end of slideable
by hearing members 80. After the suction conveyor C
member 93 there is provided a hook member 104 which
stops and a wrapper W is delivered to the transfer sta 45 is secured to member 93 by screws 105.
tion against the end register ER, the raised portion 79a
It will be noted that the hook 104 extends under the
of cam 79 engages the cam roller 78, causing the connect
‘suction conveyor C and is adapted to engage a cam roller
ing member 70 to move to the left in the direction of the
107 which is carried by an arm 108 movable with arm
arrow in FIG. 5 which in turn causes the end register ER
72, ‘FIG. 5. When cam 79 and roller 78 are in engage
to pivot about the lower pivot members 60a and 60b, thus 50 ment to move arm 72, the arm 108 likewise will pivot
moving the registering ?ngers 40 to the left as viewed
in FIG. 4. This causes the shoulders 40a to move against
about pivot 73, FIGS. 5 and 6. The movement of lever
108 is in a clockwise direction, as viewed in FIG. 6 and
the leading edge of the wrapper W and move the wrapper
causes the slideable member 93 to move to the right as
to the left so that its transverse center line is precisely in
viewed in vFIGS. 6 and 7. This movement causes the
alignment with the transverse center line of the transfer 55 spring 98 to be compressed between member 93 and the
station.
end plate 94b and at the same time moves the cross bar
In FIG. 4, it will be noted that the support 62 has
91 and the carriage members 88 to the right. The for
secured to the right-hand end thereof a vertical plate
ward ends of the carriage members 88 are provided with
81 which serves as a backstop for the end register ER.
rollers 88a which‘ are adapted to ride on the upper sur
The upper end of plate 81 is provided with an adjustable 60 face of a cross guide member 109. The upper surface of
screw 82 which is adapted to engage the vertical support
guide member 109 is provided with a pair of horizontal
59. A tension spring 83‘ interconnects the backstop 81
with the vertical arm 58 and biases the vertical arms 58
surfaces a and c which are separated by an inclined sur
face b. As the carriages 88 are moved forward under
and 59 against the screw 82. The backstop 81 supports
the in?uence of member ‘93 and lever 108, the rollers
the end register ER when the arm ‘54 thereof is pivoted to 65
88a move along the upper horizontal surface a and then
the upper phantom-line position shown in FIG. 4. The
down
the inclined surface b until they engage the lower
backstop 81 and spring 83 also cooperate to hold the arms
horizontal surface 0. This in turn causes the registering
58 and 59 in a normally vertical position when the end
?ngers 85 to move over and down thus bringing the
register ER is lowered to its operating position, shown in
full-line in FIG. 4. For some applications, it is not neces 70 shoulders 85a into engagement with the side edge of the
wrapper W and then causing the wrapper to be moved
sary to move the wrapper W in reverse direction by means
to the right, as viewed in FIGS. 6 and 7 until the longi
of the end register ER to bring it into registered position.
tudinal center line of the wrapper is in precise alignment
For example, if the amount of bounce-back at the belt 39
with the longitudinal center line of the transfer station.
can be predetermined, the operating link 70 may be
disconnected from the cam-controlled lever 72 and the 76 This side registering operation is performed concur
3,086,428
10
rently with the end registering operation previously de
nected to an arm 144 which in turn is connected to a
scribed in connection with the end register ER.
rod 145 which is slideable horizontally in a bearing
member 146. The opposite end of rod 145 is adapted to
engage the lower end of lever 137 to move it against
the stem of valve 130 and compress spring 136, thereby
opening the valve port 133a to atmosphere. This cuts
off the suction in the passages extending to suction head
125 and prevents the later from picking up a box.
'Ilhe
rollers 88a are maintained in engagement with the sur
faces a, b and c of member 109‘ by means of tension
springs '110‘, the opposite ends of which are connected to
a pin ‘88b projecting from carriage 88, FIG. 8, and a pin
111 which is carried at the lower end of an L-shaped arm
1112, the upper end of which is secured by a screw 113
As may be seen in FIG. 9, the plunger arm 127 is se
to the mounting block 90 on cross bar 91.
Also shown in FIGS. 6-8 are the box supports 116 10 cured at one end to a shaft 148. The shaft 148 is jour
nalled at one end in a bearing 149, FIG. 9A and FIG.
which extend over the transfer station of the conveyor C.
9B in casting 134 and the opposite end of shaft 148 is
The box supports 116 are secured at their rear ends to
journalled in a sleeve ‘bearing 154 journalled in a bear
mounting blocks 117 which are provided with mounting
ing 159 which is carried by one of the guides 152 for the
screws 118 which extend through the longitudinal slot
96a in member 96 which is secured to the side of the 15 transfer mechanism T. As may be seen in FIG. 9B, the
left-hand end of shaft 148 extends through sleeve bearing
conveyor frame by bolts 97. The box supports 116 are
154 which has secured to the outer end thereof a pinion
adapted to be adjusted lengthwise of the conveyor to
155. Keyed to the right-hand end of the sleeve bearing
accommodate boxes of different lengths. It will be noted
154 is an axially ?xed clutch member 154a which mates
that the box supports 116 extend over the transfer station
and are spaced above the conveyor belt 39 and the wrapper 20 with a movable clutch member 157 ?xed to shaft 148 by
key 158. The clutch member 157 is biased into engage
W a predetermined distance, as shown in FIG. 7. Thus,
ment with the clutch member 154a by means of a com
the box is not moved into engagement at the transfer
pression spring 159 which surrounds the shaft 148 and
station but instead is maintained a predetermined distance
is held in engagement with the clutch member 157 by a
above the wrapper, the purpose of which was mentioned
above. On top of the box supports 116 are rear stop 25 collar 160 on shaft 148. An operating member 161 for
the clutch member 157 is carried by a rod 162 which is
members 120 which are adjustably secured to members
slideably supported at its opposite ends by corresponding
116 by screws 1,21. The stop members 120 provide a rear
bearing members. The right-hand end of rod 162 as
stop for the boxes when the transfer machanism T of the
vie-wed in FIG. 9B is provided with an operating knob
wrapping machine moves over the transfer station to
engage a box and wrapper preparatory to transfer to 30 163 which is shown in engagement with a collar member
164 which is ?xed to the bearing member 134. The
the wrapping station. The stop members 120 are pro
collar member 164 is provided with a pair of deep slots
vided with slots 120a to adjust the stops to accommodate
164a which are adapted to receive a pin 165 which extends
boxes of different widths. It will be noted that the box
through the rod 162. At 90° with respect to slot 164a
stops 126, the box supports 116 and the side register
device SR are all carried by the support 96 which is 35 are a pair of shallow s-lots, not shown, which provide an
alternate position for the cross pin 165. By pulling knob
secured to the side frame of conveyor C. Thus, when
163 to the right, as shown in FIG. 9B, and rotating the
the transfer section of the conveyor is raised to provide
knob 90°, the pin 165 will be moved out of the deep slots
access to the wrapping machine M, the side register SR
164a and move into engagement with the shallow slots.
and associated parts likewise will be raised with the
This will cause the operating member 161 for clutch mem
transfer section of the conveyor. The hook member 104
ber 157 to move to the right and move the clutch mem
will move out of engagement with the roller 107 from
ber 157 out of engagement with the mating clutch mem
the operating mechanism, thus enabling the operator
ber 154a. Thus, any movement of the pinion 155 now
to have free access to the box-wrapping machine.
will not be transmitted to the shaft 148.
After the wrapper 12 has been registered at the transfer
As may be seen in FIGS. 9, 9B and 10, the pinion 155
station, a box B is moved into place on the box supports
is adapted to mesh with a segment gear 168 which is
116. As may be seen in FIG. 3, the transfer plunger P2
provided with a crank portion 168a and is pivotally
is in the act of moving a box B onto supports 116. The
supported at 169. The crank arm 168a is connected by
box transfer plunger P2 is provided with a suction head
a rod 176 to one arm of a bellcrank 171 which is pivotals
125 ‘which is adapted to extend into the boxes B and
engage the box bottom, as shown in FIGS. 3 and 10. The 50 ly supported at 172. The supports for pivots 169 and 172
are carried by a cross member 173, FIG. 10‘, which ex
suction head 125 is connected by way of a pipe 126 and
tends across the guides 152 for the transfer mechanism T.
?ow passages through pivoted arm 127, as later to be
The opposite arm of bellcrank 171 is provided with a
described, to» a suction valve 130, FIG. 10. The valve
cam roller 174 which is adapted to extend into a groove
130 is connected by way of a hose 131 to a suitable source
of suction. The housing 133 for valve 130 is disposed 55 in a barrel cam 175. The barrel cam 175 is mounted on
the vertical shaft 13 of the machine M beneath the main
in the upper end of a casting 134, the lower end of which
cam 12. The box stop cam 36 previously described is
is supported on the table of the wrapping machine M.
mounted on the bottom end of the box transfer cam 175
The valve housing 133 is provided with a port 133a, FIG.
and the vacuum valve cam 176 is mounted on the top
9B and FIG. 10, which is adapted to be closed by the
60
end of earn 175.
head of the valve 130. The stem of the valve 130 extends
Referring to FIGS. 9A and 9B, it will be seen that
through the opposite wall of housing 133, FIG. 10, and
between arm 127 which is ?xed to shaft 148, and the end
is provided with a compression spring 136 which is adapted
of casting 134, there is positioned a sprocket 178 which
to maintain the head of valve 130 in closed position with
is ?xed to the casting 134. A sprocket chain 179 extends
respect to the port 133a. As may be seen in FIG. 10,
the stem of valve 130 is adapted to be engaged by one 65 around the fixed sprocket 178 and also around a rotatable
sprocket 180. The sprocket 180 is carried by rotatable
end of a pivoted lever 137, the opposite end of which
member 182, journalled in bearing sleeve 18217 in the
is provided with a cam roller 138, the purpose of which
end 127b of arm 127. The opposite end of rotatable
will later be described. As earlier described, the valve
130 may be operated manually by means of an operating 70 member 182 carries a sleeve 183 which supports the pipe
126 which connects to the suction head 125 for gripping
lever 28, FIGS. 3 and 1-0. The operating lever 28 is con
the boxes B. It will be noted that rotatable member 182
nected at one end to a rod 141 which extends beneath
and sleeve 183 are rotatable as a unit in the outer end
the extension BCI of the box conveyor and is supported
127b of arm 127. It will be noted that the members
at opposite sides of the suction conveyor C by support
members 142. The opposite end of the rod 141 is con 75 126, 182 and 127 are provided with internal passages
3,086,428
11
12
126a, 182a and 12711, respectively, which connect with
ever, provision has been made in the present system for
positive vertical movement of the suction members in
an internal passage 148a in shaft 148, FIG. 9A. The
passage 148a connects with the valve chamber 13312 in
valve housing 133 which in turn connects by way of an
elbow 129 (FIG. 10) to hose 131 which leads to the
described. As may be seen in FIG. 11, the transfer
mechanism T includes a pair of spaced tubular transfer
vacuum pump.
members 210 having box-gripping ?ngers 211 pivotally
accordance with a predetermined sequence now to be
When boxes are to be transferred from the box con
supported as by bolts 212, at their forward ends. The
veyor to the box supports, as in FIG. 3, the clutch knob
?ngers 211 are biased to a gripping position by tension
163 is moved to the position shown in FIG. 9B with
springs, not shown. Channel members 213 disposed on
clutch members 157 and 154a in engaged position. The 10 the inner sides of the transfer members 2119 provide for
box transfer arm cam 175 is rotated by the main shaft
adjustment of the front box stops 214 which cooperate
13 and the cam truck 175a in cam 175 is effective on
with the ?ngers 211 to grip the opposite corners of the
cam roller 174 to pivot the bellcrank 171 about its pivot
box B. As is explained and illustrated in the aforesaid
172, thereby causing rod 170 to pivot the segment gear
patent to Lange et al., tubular members 210 are slidably
173 about its pivot 169 to rotate the pinion 155. Since 15 mounted in frame brackets 210a at each side of the trans
the clutch member 154a, to which pinion 155 is ?xed,
fer mechanism T (FIG. 11). Members 216 are adjust
is coupled to the shaft 148 by the clutch member 157,
ably clamped by bolts 241 and clamps 241a to a crossbar
the plunger arm 127 is adapted to rotate from its full
242 slidable in rails 152. The crossbar has ears 242a
line position in FIG. 10 in a clockwise direction to its
connected to a carriage-reciprocating link 242b. Line
broken-line position where the box B is deposited on the 20 24% is operated by a crank (not shown) driven by the
box supports 116 which extend over the transfer station
main drive mechanism. The suction members 215 which
above the suction conveyor. Since the sprocket 178 is a
are adapted to engage the leading ?ap of the wrapper W
?xed sprocket, and the sprocket 180 is a movable sprocket,
are carried by hollow blocks 217 which are disposed
the rotation of arm 127 will cause the sprocket chain
within the tubular transfer members 210, FIG. 11. The
179 to rotate member 182 about its axis and it will 25 interior of the blocks 217 are connected to pipes 218
maintain the suction member 125 and the box carried
which extend through suitable packing material (not
thereby in a substantially horizontal plane as it is trans
shown) in the transfer members 210 and thus form a
ferred from its position on the box conveyor BCI to its
suction path from the rear ends 210a of transfer members
position on the box supports at the transfer station. When
to the suction blocks 217. The ends 210a of transfer
the box has been transferred to the box supports 116, the
members 210 are adapted to be provided with hose con
cam track 175a in the box transfer cam 175 is so shaped
nections 21%, FIG. 13, which extend by way of line 2100
as to provide a short dwell to insure release of the box
to a vacuum pump, not shown, and provide suitable
suction.
B from the suction head 125, followed by movement of
the box transfer arm 127 in a counterclockwise direction
As may be seen in FIGS. 11 and 12, the suction mem
from the dotted line position in FIG. 10 to the solid line 35 bers 215 have an outer housing 220 which is supported
position preparatory to transferring a succeeding box.
by a member 221 which in turn is secured to block 217
Since the boxes are held to the member 125 by suction,
by a screw 222. The suction member 215 is adapted for
it is necessary that the suction be cut off during the short
vertical movement, FIG. 12, within the housing 229.
dwell in order that the box will be deposited on the box
The suction member 215 is provided with a port 215a
supports 116 at the transfer station. This is accomplished 40 in the side wall thereof which is adapted to communicate
automatically by the lever 137 which is pivoted interme
with a vertical slot 229a in .the adjacent side wall of the
diate its ends with the lower end being adapted to engage
housing 220. The slot 220a is in communication with a
the stem end of valve 130 while the upper end of lever
tubular member 224 which in turn communicates with
137 is provided with a cam roller 138 as shown in FIGS.
the chamber within block 217. Thus, a suction path is
8, 9 and 10. As may be seen in FIG. 9, the pivot 137a 45 completed from each suction member 215, through port
for lever 137 is carried by the casting 134. Pinned to
215a, slot 229a, tubular member 224, block 217 and pipe
shaft 148 is a cam 185 adapted to engage roller 138 for
218 to the interior of transfer member 210, the rear end
moving the lever 137 against the end of stem 130 and
210a of which is connected by way of the hose 2111b to
thereby compressing the spring 136 and opening the port
the source of suction. The screw 222 is adapted to lock
The cam 145 is so shaped that this 50 the suction block 217 along with the suction member 215
operation takes place during the last 10° of movement of
in the desired location on the transfer member 210 to
box transfer arm 127 causing the box to be deposited on
accommodate the particular size wrapper being applied to
the box supports 116. When the arm 127 moves from its
the box. The screw 222 additionally provides a pivotal
box-depositing position at the transfer station in reverse
support for a segment gear 225. The teeth 226 on the
direction to its box-pickup position, the compression 55 segment gear are adapted to engage corresponding teeth
spring 136 closes port 133a and valve 133, re-applying
on the side of the suction member 215. The segment gear
suction to the suction head 125 so that it is ready to pick
225 is provided with an arm 230 which is connected to
up a box upon its return to the box-pickup position shown
a block 231 secured to a reciprocating rod 232. The
in full-line in FIG. 10. The movement of the box trans
forward end of the rod 232 is carried in a guide 233 and
fer plunger P2 is so timed ‘with respect to the operation 60 the rear end of rod 232 passes through a guide 234.
133a to atmosphere.
of the transfer mechanism T of the wrapping machine M
that the suction member 125 is removed from the box B
at the transfer station before the transfer mechanism en
gages the box and wrapper to transfer them from the
transfer station to the wrapping station of the wrapping
machine M.
After the box and wrapper have been positioned in
spaced registered relation at the transfer station, they are
ready to be transferred to the wrapping station of the
box-wrapping machine M. This is accomplished by the
transfer mechanism T as now to be described in connec
The rods 232 are provided with compression springs 236
which extend therearound and are adapted to be posi
tioned between the rear guides 234 and a collar 237
which is secured to the rods 232. The rear ends of the
rods 232 are connected to a cross rod 239, the opposite
ends of which are connected to lower ends of arms 240.
The upper ends of arms 240 are secured to a cross rod
241 which is journalled in support members 243 carried
by the carriage bar 242. Also secured to the cross rod
241 are operating arms 245 which at their outer ends are
provided with cam rollers 246 adapted to ride on a cam
tion with P165. 11 and 12. The transfer mechanism T
247 which is carried by the transfer guides 152. The
is generally similar to the transfer mechanism disclosed
cam 247 has a rise 247a at one end and a similar rise
in Fig 16 of the aforesaid Lange et al. patent. How 75 2471) at the opposite end with a ?at or horizontal surface
(3,086,428
13
14
interconnecting these rises. The transfer mechanism T
pearance of which would be impaired if the design were
has a ?xed length of stroke and the cam 247 has a ‘length
applied to the box off center.
With the box and wrapper registered in spaced rela
tion at the wrapping station, the suction to the suction
members 215 is cut off to release the wrapper W. This
corresponding to the stroke length. Thus, it will be seen
that at each end of the stroke, the cam roller 246 will
engage the sloping portions 247a and 247b of the cam
while during the remainder of the stroke, the cam roller
is accomplished by opening the suction line 21% to at
mosphere. It will be noted that in line 2100 there is a
valve 260, the valve element 2600 of which is main
tained normally closed by a spring 261. The valve ele
246 will be on the upper level of the cam between areas
247a and 247b. When the transfer mechanism T is at
the wrapping station, the cam roller 246 will be on cam
surface 247a and the suction member 215 will assume the
lower position shown in full~line in FIG. 12. When the
ment 260a is connected to a solenoid 262 which is in
circuit with a cam-operated switch 263. The operating
cam 176, iFIG. 13, is carried at the top end of the box
transfer mechanism moves from the wrapping station over
transfer cam ‘175. The lobe on cam 176 is so shaped
the transfer station, the cam roller moves to the upper
as to close switch 263, energizing solenoid 262 and open
flat surface of cam 247 causing the arm 245 to pivot
in a clockwise direction which rotates rod 241 and in 15 ing valve 260 to atmosphere when the box and wrapper
are registered at the wrapping station. Thereafter, the
turn rotates arm 240 in a similar direction causing the
valve 260 is closed and suction re-applied to the suction
rods 232 to move to the left as viewed in FIG. 12 against
members 215. The wrapping machine M then operates
to clamp the box and wrapper between the platen 223
clockwise direction thereby raising the suction members 20 and the form block F in registered relation. The box
wrapping tools then complete the application of the wrap
2415 upwardly in a vertical direction until they assume.
per to the box and the completed box is ejected from
the phantom-line position shown in FIG. 12 adjacent
the machine by ejectors 250, FIG. 11, in the manner de
the full~line showing of suction member 215. During
scribed in the aforesaid Lange et al. patent.
the transfer of the transfer mechanism T to the trans
The suction members 215 preferably are provided at
fer station, the suction members 215 maintain the raised 25
their lower end with a face or tip of Teflon for engaging
or retracted position until just prior to ‘arrival over the
the adhesively-coated surface of the wrapper. Their con
wrapper W at the transfer station. The type of path is
struction is similar to that described and illustrated in
‘graphically illustrated in FIG. 12 by the dotted line and
the aforesaid Lange et al. patent. However, the tips
phantom line positions of the suction members 215. At
the compression of springs 236. This movement of rods
232 causes the segment gears 225 to rotate in -a counter
this time the cam roller 246 moves down the slope 24711
of the suction members 215 need not be made of Te?on
thereby lowering the suction members 215 into engage
for loose-wrap work since the suction members 215 may
ment with a wrapper on the suction conveyor at the
be adjusted to engage the wrapper at a non~adhesive
transfer station. At this time the forward box-gripping
?ngers 211 have moved along the end walls of the box
coated area.
B to grip the rear corners and force the front corners
of the box against the front box stops 214 (FIG. 11). The
box B and wrapper W have now been locked in a spaced
registered relation and this registered relation is accurately
maintained during the entire simultaneous transfer of the
box and wrapper from the transfer station to the wrap
ping station. The box is supported by spring-actuated
?ngers 211 in conjunction with ?xed stops 214 so that
the box is spaced above the wrapper about %".
While the present system 10 has been primarily de
scribed in connection with loose-wrap work, it is also
adapted for tight-wrap work. The tight-wrap work may
be performed by using either the plunger P at register
station R, or by using plunger P2 at register station R2.
When using register R, the system is operated in the
40
same manner as described in the aforesaid Andresen et
al. patent. When using the second registering station
R2 for tight-wrap work, the gluer G applies an adhesive
coat over the entire face of the wrapper rather than just
to the marginal edges as for loose-wrap work. The
When the transfer mechanism starts its return move- ‘
45 adhesive~coated wrapper W is registered at the transfer
ment to the wrapping station, the cam rollers 246 move
up the cam slope 24712 causing the arms 245, rods 241
and arms 240 to move in a counterclockwise direction
station by both the end register device ER and the side
register device SR and the box B is deposited on the
which in turn causes the rods 232 to move to the left and
rotate the segment gears 225 to raise the suction mem
box supports 116 by the swinging plunger P2. It is to
be noted that the box is not moved into engagement
with the wrapper at the transfer station and thus there
bers 215 to their elevated phantom-line position. This
elevated position is maintained during the entire return
stroke of the transfer mechanism T until just prior to
the completion thereof. This elevated position assures
that the leading edge of the wrapper W which is sup
ported by the suction members 215 will be at an elevation
sufficiently high to clear the platen 223 of the box-wrap
is avoided any possibility of shifting the alignment of
the box with the wrapper due to resiiiency of the spring
biased suction cup 125 on the plunger P2. The adhesive
55
covered ‘wrapper and box are then transferred in spaced
registered relation by the transfer mechanism T to the
wrapping station, where for the ?rst time, the box and
wrapper are brought into positive engagement and the
Wrapper adhesively applied to the box by the wrapping
ping machine and thus avoid any damage to the wrappers.
As the transfer mechanism arrives at the wrapping sta
tion, the cam rollers 246 ride down the slopes 247a and 60 tools of the box machine M.
Thus it will be seen that the present system 10 is suit
return to their original position as shown in FIGS. 11
able for the loose-wrap of boxes and it is suitable for
and 12, thus returning the suction members 215 to their
producing tight-wrap boxes by two different methods.
full-line position as shown in FIG. 12. From FIG. 12
By using the second registering station R2 for tight-wrap
it will be noted that the wrapper W has now been re- I‘ ‘ work, the adhesive applied to the wrapper has adequate
65
turned to the same elevation at the wrapping station that
time to penetrate the wrapper W and thus avoid possible
it originally occupied at the transfer station with respect
blistering of the wrapped boxes.
7
While a preferred embodiment of this invention has
to the box B. During transfer, the accurate register
which was obtained at the transfer station‘ will be main- 7 ‘ been described and illustrated, it shall be understood that
tained, so that the parts also register at the wrapping sta 70 the invention is not limited to the speci?c arrangement
shown and that changes and modi?cations may be made
tion. It is necessary to maintain this accurate register
within the scope of the appended claims.
in order that the center of the wrapper will be precisely
What is claimed is:
applied to the center of the box B and thus insure a
1. In a box-wrapping system having a transfer station
perfect wrapping operation. This is extremely important
when the wrappers are provided with a design, the ap 75 and a wrapping station, ‘means at said transfer station for
3,086,428
15
supporting a box in spaced registered position above a
wrapper, box-gripping structure movable between said
stations for transferring a box from the transfer station
to the wrapping station, suction means movable between
said stations for supporting a wrapper for movement from
the transfer station to the wrapping station, means for
supporting both said box-gripping means and said suction
means in spaced relation for concurrent transfer thereof
with a registered box and wrapper between said stations,
16
conveyor, a transfer station, said wrapper conveyor ex
tending past said pick up station to said transfer station,
end registration means for the wrappers at said transfer
station, relatively thin ?at box supporting means overly
ing wrappers at said transfer station, reciprocating box
pick up means movable in the line of motion of said con
veyors between said pick up and transfer stations for
transferring boxes in succession from said pick up station
to said box support means and into register with corre
and means for moving said suction means to‘ a different 10 sponding wrappers on the wrapper conveyor at said trans
elevation with respect to said box-gripping means at both
fer station, a wrapping station at one side of said transfer
of said stations as compared to its position between said
station, and transfer means movable transversely of said
stations to maintain the register of the box while varying
wrapper conveyor between said transfer and wrapping
the spacing therebetween.
stations for transferring in succession unadhered, verti
2. In a ‘box-wrapping system according to claim 1 15 cally spaced box and wrapper assemblies from said trans
wherein said means for moving said suction means com
fer station to said wrapping station.
prises a stationary cam bar having a slope at either end,
6. in a box wrapping system according to claim 5
lever means pivoted to said supporting means for said
wherein said box pick up means comprises an oscillatory
suction means, cam follower means on one end of said
lever means adapted to engage said cam bar, and structure
on the opposite end of said lever means and engageable
arm, a suction head pivotally mounted on the end of said
arm, and means for maintaining said suction head hori
zontal during oscillation of said arm.
7. In a box-wrapping system, a frame, a transfer
with said suction means for raising and lowering said
suction means in accordance with the shape of said cam
station, an intermittently driven conveyor for transporting
bar.
wrappers to said transfer station, a side register device
3. In a boxwvrapping system having a transfer station 25 for wrappers at said transfer station, said side register
and a wrapping station, means at said transfer station for
device including ?nger means disposed over the wrapper
supporting a box in spaced registered position above a
conveyor at said transfer station and having depending
wrapper, box-gripping structure movable between said
portions for engaging the side of a wrapper, means for
stations for transferring a box from the transfer station
shifting said ?nger means transversely of said wrapper
to the wrapping station, suction means movable between
conveyor in a direction to push the wrappers laterally
said stations for transferring a box from the transfer sta
into ?nal lateral registration on the conveyor, roller
tion to the wrapping station, suction means movable be
means for supporting said ?nger means at a position
tween said stations for supporting the wrapper for move
spaced above said transfer station, and cam means on
ment from the transfer station to the wrapping station,
said frame for supporting said roller means, said cam
means for supporting both said box-gripping means and
means having a pair of spaced horizontal surfaces inter
said suction means in spaced relation during the transfer
connected by an inclined surface for engagement by said
of a box and wrapper thereby between said stations.
roller means to guide said ?nger means over said trans
means for moving said suction means to a different ele
fer station and down into engagement with the side edge
vation with respect to said box-gripping means at both
of a wrapper upon operation of said ?nger shifting
said stations as compared to its position between said 40 means.
stations, and means for shutting off the suction to said
8. In a box-wrapping system, a transfer station, an
suction means when said suction means is at the wrap
ping station.
intermittently driven conveyor for transporting wrappers
to said transfer station, an end register device at said
4. For use in an automatic box-wrapping system for
transfer station for engaging the leading edge of a
“loose-wrap” work wherein the wrappers have unset ad 45 Wrapper on said conveyor, a side register device sup
hesive only along their edges, apparatus for supplying
ported at the transfer station and adapted to move the
registered but unadhered box and wrapper assemblies to
same wrapper transversely of said conveyor, and means
a wrapping machine, said apparatus comprising an inter
for concurrently operating said end register and side
mittently driven box conveyor, a pick up station at the
register devices for establishing precise end and side
end of said box conveyor, a box stop at said pick up 50 registration of each wrapper at said transfer station.
station, an intermittently driven wrapper conveyor dis
9. In a box-wrapping system, a transfer station, an
posed below and extending in the same direction as said
intermittently driven wrapper conveyor for transporting
box conveyor, a transfer station, said wrapper conveyor
wrappers to said transfer station, an end register device
extending past said pick up station to said transfer sta
at said transfer station, said end register device including
tion, end registration means for the wrappers at said 55
?nger means extending over the surface of said conveyor
transfer station, reciprocating box pick up means mov
for engaging the leading edge of a wrapper, means for
able in the line of motion of said conveyors between said
supporting said ?nger means for upward movement rela
pick up and transfer stations for transferring boxes in
tive to said conveyor, and means for lifting said ?nger
succession from said pick up station into register with
corresponding wrappers on the wrapper conveyor at said 60 means when said conveyor is being driven in order to
completely clear the moving conveyor.
transfer station, a wrapping station at one side of said
10‘. In a box-wrapping system according to claim 9,
transfer station, and transfer means movable transversely
means for cyclically moving said end register device in
of said wrapper conveyor between said transfer and wrap
a direction opposite to the direction of travel of the
ping stations for transferring in succession unadhered
conveyor to push a wrapper at the transfer station back
box and wrapper assemblies from said transfer station to
said wrapping stat-ion.
5. For use in an automatic box-wrapping system for
“loose-wrap” work wherein the wrappers have unset ad
65 to its precise register position.
11. A method of transferring a box and Wrapper to
a wrapping station comprising the steps of registering a
box longitudinally and transversely at a transfer station,
registered but unadhered box and wrapper assemblies 70 registering a box with the wrapper while supporting the
to a Wrapping machine, said- apparatus comprising an in
box a short distance from the wrapper, transferring the
termittently driven box conveyor, a pick up station at the
box and wrapper while in spaced, registered relation to
'hesive only along their edges, apparatus for supplying
‘end of said box conveyor, a box stop at said pick up sta
tion, an intermittently driven wrapper conveyor disposed
the wrapping station, and thereafter bringing the box
against the wrapper for subsequent application of the
below and extending in the same direction as said box
wrapper to the box.
3,086,428
18
17
12. Apparatus for providing a wrapping station with a
box and an unadhered wrapper, said apparatus c0mpris~
ing a transfer station, means for registering a wrapper
both longitudinally and transversely at said transfer sta
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,144,338
2,152,775
2,757,586
2,867,158
2,904,192
2,938,636
10 2,958,267
2,961,931
tion, flat box support means extending over a wrapper at 5
said transfer station, means for registering a box with
the wrapper on said box support means, and means for
transferring the box and wrapper in vertically spaced
registered relation from said transfer station to the wrap
ping station for subsequent application of the wrapper to
the box.
1939
1939
1956
Andresen et al. ________ __ Jan. 6, 1959
Reynolds et a1. ______ __ Sept. 15, 1959
Miller ______________ __ May 31, 1960
Wolff et a1. __________ __ Nov. 1, 1960
Von Hufe et a1. ______ __ Nov. 29, 1960
Lange ______________ __ Jan. 17,
Stokes ________________ __ Apr. 4,
Haessler ______________ __ Aug. 7,
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