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Патент USA US2115757

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May 3, 1938-
' Filed July 11, 1956
2 Sheets-Sheet 1
Jef/z L. Wins/0W
' 5f
May 3, 193-8.
Filed July 11, 1956 v
. .M.
mm. . v
R. NM.
' 2 Sheets-Sheet 2
0 5:?‘
rim/as May 3, 1938
2,115,757 '’
8.115.181 ~
canon smarmd nnvrcn ’
Application July u, ‘use, Serial No. sales
‘OH-a (a. isi-izii
A further object of the invention is the pro?
and more particularly to oneof the automatic
vision of a machine which stencils cartons neat
ly and quickly with printing or a design of any.
the like.
reasonable size. Other objects will appear here
inai'ter as the description proceeds.
,‘lhese objects are accomplished by avmachine
g .. At the present time, due to the cheapness of
corrugated paper cartons and their combination
of light weight and strength, a great many are
used in shipping small and medium-sized pack
ages. It is usually necessary in letter each car
miscellaneous information such ascontents, lot
number. etc. This is usually done by means of
a stencil which may be made of any thin, strong
material such as paper, brass and the like. The
15 stencil is'held in place with one hand and the
A inked brush is applied with'theother. There
are also stenciling devices consisting essentially
ofaroilwhichholdstype. 'l‘hetypeofthe
' under the roll so that the legend is applied to
the moving carton. Equipment of this type is
fairly satisfactory for marking lot' numbers or
dates. but is not particularly satisfactory for
printing long names and addresses. such equip
. ment is not adapted for stenciling the ends of
acarton. 'ihisisimportant becauseadvertising
and trade-marks are usually printed on the top
and sides, but information peculiar to the indi
vidual carton should be printed on the ends since
having a belt conveyor which delivers the car
ton through adjustable side guardrails- which
are adapted to hold the carton firmly in position
while the stenciling is being applied. 'lfhe’sten- 10
oil ‘and brush are mounted in a frame which‘
swings about a vertical shaft. As the frame
swings against the end of the carton, the brush
automatically moves across and back over the
face of the stencil thereby printing the legend 16 '
on the end of the carton. The carton is then
released and passed over the conveyor for stor
age or shipment.
In the drawings, Figure 1 represents a side ele
vation, ll'igin-e 2 is a front elevation, and Figure
3 is atop plan view of the safety switch. Fig
ure‘! is an elevation of the same switch.‘ Figure
5 is a diagrammatic iso-metric arrangement of
the parts. ll'igure? is a detailed view of the de-_
vicefor holding the carton in place and means g5 ‘
for releasing it after it is printed. Figure 7 is '
a detailed view of the stencil holder. _Figure 8
is a detailed elevation of the'stencil holder.
- Inall the ?gures, irepresents mils which make
‘up the roller conveyor for carrying. the carton ‘so I
to the printing device. A belt 2 passes over the
inapile. I'hrthisreasomitishighly important mllsltoassistincarryingthecartonintoand
to have a mechanical device for stenciling the
am from its position as it is stenciled. A trip
ping lever is indicated as 8 which extends slight
ly above the. plane of the conveyor and which as
numberofcartonsaretobesteneileddue inturnoperatesaclutchl
i E a E.i g thecartoninpositionand
lever ii whichismountedon theshaiti! which.
in‘. turn revolves in the hollow shaft il.
isoperatedbythei'riction clutch ll. 'I‘hisin
is oper?ed by the shaft ll, lever ll, rod ll,
of a disc 23 which bears against the guides 3
to assist in holding the carton in position while
it is being printed. The mechanism is operated
the bottom of the frame ‘I as shown in Figures 3
and 4' which consists of a lever 31 attached to an
electrical switch 33. As the frame 1 moves
by the motor 33, gear box 33, chain and sprock
ets 3|, 32, 33, 33, 33, and 33.
any obstruction comes in contact with the lever
In the operation of the machine, the carton
is delivered to the stenciling device by means of
the rollers and belts I and 2. When the carton
passes over the tripping lever 3, the machine is
10 set into motion through levers, which engage the
positive type clutch I which allows the mecha
nism‘to go through one complete cycle of op
eration. As shown in Figure 2, the clutch l is
activated through levers by a carton passing over
15 the trip 3. The clutch 4 is of the one revolution
type similar to those used on a punch press.
When the tripping lever 3 is depressed by the
carton, clutch l is operated through levers so
that it engages the load and pulls it through 360",
after which it disengages itself and remains at rest
until tripped again. The carton then moves to
stop 3 and the guides 5 are‘pressed ?rmly against
the carton by means of the segmental disc 23'.
through 90° parallel to the end of the carton if
31, which is very easily moved, the switch 33 is
opened and the machine is stopped thereby avoid
ing damage or errors in operation. The lever 31
is held in an outward position by a spring not '
shown. After the frame 1 reaches its ?nal posi
tion in this travel, the lever 31 is moved but at
this time the switch 33 is mechanically held in
contact for the continuous operation‘ for one cycle
of the machine.
As the frame 1 swings 90‘ around shaft II the
safety switch lever is .carried with it in the posi
tion shown in Fig. 3. During the movement of
the frame if any'obstruction comes in contact
with lever 31, itis easily moved and operates
electrical switch 33 and stops the machine. when
frame 1 ?nally comes into place over the end of
the carton the lever 31 is moved back in line with
frame 1 and would normally open the switch 33
.‘When the trip lever 3 has been actuated, the
carton travels promptly up to stop‘ 3. The frame
Y lthen swings through 90° about the shaft l2when
connection in the linkage to allow the lever 31 to
make this movement while at this location the,
a spring latch on the outside end which is beveled
switch 33 is mechanically stopped from opening
and stopping the machine. As soon as the frame.
' in th‘e'f'ront side snaps into a rectangular socket
to hold the frame during the stenciling opera
30 tion.
The shaft l2 turns the frame 1 by a con
nection through the friction clutch M which is
in turn connected to the hollow shaft l3. This
hollow shaft is connected rigidly to the frame 1
_ and when the frame reaches the end of its travel
35 in position across the end of the carton, the fric
tion clutch ll slips leaving the hollow shaft l3
stationary but the inside shaft l2 continues to
turn and slides the stencil brush 3 which is in
turn operated by the rod and levers l3 and II
completely across the stencil 3 and back to the
‘normal position as shown. in Figure '7.
As the brush returns to the normal position it
and stop the machine.
However, there is a spring '
1 moves away from the face of the carton the
switch,'33 and lever 31 are again operative to
stop the machine. The switch 33- is normally
closed so that the machine will operate.
The machine herein described is of particular
value for stenciling on the end of paper shipping
cartons and the like with the name of the product,
date, serial number, or other manufacturingin
formation. It may also be used for printing any -
design, trade mark, or other legend. The ma
chine herein disclosed is preferably a double unit _
with two stenciling devices, one for each of two
package lines, and so arranged that the stenciling
is alternate; that is, one side and then the other,
but not stenciling both sides at the same time
although this may be done if desired. ‘The pre
ferred method of operation'avoids any possible
jamming of the cartons when released because
‘both production lines are delivered to the same
comes in contact with the vertical piece 33 on the
spring latch (Figure 8) mentioned above and
pulls this latch out of the socket. The frame 1
is then free to swing 90° from the end of‘this
carton to the open position. The stop. 3 is then
pulled down by levers 23, 23, and 21 and the conveyor. when a single production line is ?tted \
action of the cam 23. The belt 2 then pushes with the machine herein described, the double
the carton forward out of the machine and the arrangement would not be necessary.
stop 6 is returned to its original position by the
The machine herein disclosed offers several ad
spring 25. The machine is then again in posi
vantages over hand stenciling as indicated above.
tion to receive the next carton. The segmental It is ‘also designed to use paper ‘stencils because
disc 23 is also designed so that it revolves with of their relative cheapness, although any suitable
55 the shaft l3 and comes in contact with the guide material. such as copper, bronze, or silk may be
rails 5 pressing the same slightly against the side used. In addition to being cheap, paper stencils
of the carton to hold it ?rmly during the stencil
are quickly and easily cut and are in general
ing operation. This disc turns and leaves the preferred.
guide rails free which allows the cartons to enter
- It is apparent that many widely different em
and leave the machine.
bodiments of this invention may be made with
The brush a is held in the frame r by‘ a bolt out departing from the spirit and scope thereof;
and wing nut. This frame is slotted so that the and, therefore, it is not intended to be limited
brush can be adjusted, vertically for the desired except as indicatedin the appended claims.
position for stenciling. The stencil is held in the
I claim:
frame 1 by a vertical clamp on the outside of
1_. An automatic stenciling device comprising a
the frame. A small metal hookis clamped on conveyor belt for conveying the carton to be
to the other end of the stencil and hooked around stenclled into position, guide rails, means for
a vertical spring. The stencil can be set at any pressing the guide rails against the carton, a
height in the frame 1. The brush is also easily rotatable stencil holder mounted on a vertical
70 replaceable and one is selected for the proper shaft, means for rotating the said stencil against
width of the stencil. These brushes have a soft
felt pad in the center with bristles on either side.
The felt pad extends to the end of the bristles
and is kept moist with in]: as needed.
The safety switch arrangement is located on
the end of a carton and mechanical means for
moving a brush across the face of the stencil
whereby a legend is stenclled on the carton.‘
2. An automatic stenciling device for stenciling
cartons comprising means for moving a carton up 18
\ to and away f?rom a predetermined position,
means for holding the carton ?rmly in the said
position while it is being stenciied', and a rotat
able stencil holder mounted on a vertical shaft,
mechanical ‘means for moving a brush across the
face of the stencil whereby a legend is stenciled
on the carton, means for swinging the stencil
holder away from the carton, and means for re
leasing the carton from the said pre-determined
10 position.
3. An automatic stenciling device comprising a
conveyor adapted to move a carton to and from
a pre-determined position, adjustable guide rails
at the said position for holding the carton ?rmly,
l5 and means for pressing thetcsaid guide rails
against the sides of the carton, a stencil holder
adapted to swing against the carton, and a brush
adapted to be moved across a stencil while the
said stencil holder is against the carton, means .20
for removing the stencil holder from the path of
' 3
the carton, a stop adapted to be interposed tem—‘ I
porariiy in the path of the carton, and means
for removing the stop from the said path.
4. An automatic‘ stenciiing device comprising a '
conveyor adapted to move a carton to and from
a‘ pre-determined position, a tripping device in
the path of the said carton'before it reaches the
said pre-determined position, said tripping device '
adapted to set the stenciiing device in operation
for one complete cycle only, adjustable guide rails 10
‘disposed on each side of the carton, means for
applying temporary pressure against the sides of
the carton, a stencil holder, a stencil mounted
therein, and a brush adapted to be moved across
the face of the stencil,_ means for swinging the 15
said stencil holder against the end of the carton,
and means for actuating the said brushwhile
the holder is in this position.
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