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Патент USA US2118035

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May 24, 1938.
2,118,035
E. B. BERKO'WITZ
GUMMING APPARATUS FOR ENVELOPE MAKING MACHINES
Filed Dec. 26, 1955
2 Sheets-Sheet l
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INVENTOR
?erkowifz,
ATTORNEY
May 24, 193$
'
E. B. BERKOWITZ
‘2,118,035
GUMMING APPARATUS FOR ENVELOPE MAKING MACHINES
Filed Dec. 26, 1955
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INVENTOR
[age/2
BY
_ ?erkowiiz
‘ ATTOREVEY
~_ Patented May 24, 1938
2,118,035
UNITED STATES PATENT OFFICE
2,118,035
GUMMTING APPARATUS FOR ENVELOPE
MAKING MACHINES
Eugene B. Berkowitz, Kansas City, Mo., assignor
to Baltimore Paper Company, Kansas City, Mo.,
a corporation of Missouri
-
Application December 26, 1935, Serial No. 56,226
7 Claims.
This invention relates to envelope making ma
chines, and particularly to those of the type il
lustrated in the United States patent issued to
Winkler and Dunnebier, No. 2,008,236, under date
5 of July 16th, 1935, wherein the sealing ?aps of en
velope blanks are gummed and dried prior to
folding.
In machines of this character the blanks are
conveyed in continuous overlapped relation, with
10 only that portion of the sealing ?aps exposed to
which gum is to be applied by means of a wiper
strip yieldably supported in_' contact with the
moving blanks. Since it'is impossible to obtain
uniform contact of the wiping strip across the
width thereof, the gum is applied in streaks, with
some portions scantily covered while other por
tions are excessively coated. Due to the excess
application of the gum, it is necessary to pass the
blanks through a long drying tunnel, wherein
they are subjected to heat, which heat results in
curling or warping of the flaps so that they will
not lie in a ?at plane.
It is, therefore, the principal object of the pres
ent invention to apply the gum uniformly across
25 the width of the flaps in exactly the correct
amount so that the flaps may be dried without
being subjected to heat to obviate the curling ten~
dency thereof.
It is also an important object of the present in
vention to provide an applicator which is readily
adjusted for application of gum to selected por
tions of the flaps, or to flaps of different width
In accomplishing these and other objects of
35
the invention, hereinafter pointed out, I have
provided improved details of structure, the pre
ferred form of which is illustrated in the ac
companying drawings, wherein:
‘
Fig. 1 is a perspective view of a portion of an
envelope machine equipped with a gum applica
tor embodying the features of the present inven
tion.
Fig. 2 is a vertical section on the line 2-2 of
Fig. 1.
.
shafts 3 that mount spaced pairs of conveyor belts 4-5 and 6-1. The conveyor belts 4 and 6
comprise relatively narrow ?at belts, having runs
8 operating over a support 9, across which the
envelope blanks are carried from a fanning out
or timing mechanism ID to a drying belt I I.
The belts 5 and ‘I are of substantially the same
width and spacing as the belts 4 and 6, and have
runs I2 operating directly over the runs 8 to
clamp the side portions of the blanks therebe
illustrating the method of supporting the trans_
fer and applicator rollers.
~
Fig. 5 is a section on the line 5-5 of Fig. 3.
Fig. 6 is a detail section on the line 6-6 of Fig.
3, particularly illustrating the gearing for driving
'
Fig. 7 is a detail perspective view of the
fer roller supporting rod and bracket.‘
10
tween and effect their orderly movement down
the support 9.
As pointed out in the above mentioned patent,
the fanning mechanism l0 effects overlap of the
blanks in continuous order with only that part of 15
the sealing ?aps exposed to which the gum is to
be applied, as shown in Fig. 1, and the overlapped
blanks are fed in continuous order to the drying
belts, which carry them to the folding section of
the machine (not illustrated).
1
When the gum is applied to the blanks by
means of a wiper strip, it is di?icult to obtain
uniform pressure against the entire width of the
strip, and I have, therefore, provided an im
proved method for effecting uniform application
20
of the gum, as now to be described.
I3 designates a cross bar that is located at a '
convenient point intermediate the length of the
belt runs 8 and I2, to support an applicator mech
anism generally designated I4, the ends of the
cross bar being rigidly supported from the side
frames 2 of the envelope machine. The appli
cator mechanism includes a pan I5 that is
mounted on the cross bar I3 at a point substan
tially midway of the side frames 2. This pan or
reservoir I5 is preferably of rectangular shape 36
and has substantially perpendicular end and rear
walls I6 and IT, a forwardly inclined front wall
I8, and ?at bottom I9. The top of the pan is
open to accommodate a pickup roller 20, which is
rotatably supported so that the lower portion 40
thereof normally operates in a body of liquid
gum 2|, contained in the pan.
Fig. 3 is a plan view of the applicator, particu
larly, illustrating‘ the gum pickup, transfer and
applicator rollers.
Fig. 4 is a section on the line 4-4‘of Fig. 2,
the respective rollers.
(CI. 93-62)
'
~
The pickup roller 20 is mounted on a shaft 22,
having its ends journaled in bearings 23 and 24
carried by arms 25 and 26 that have their rear. 45
ends 21 and 28 pivotally supported at the rear
of the pan on a rod 29, the rod 29 being sup
ported by means of brackets 30 and 3| ?xed to
and projecting from the cross bar I3. Forward
ends 32 and 33 of the armsare provided with 50
bearings 34 and 35 for mounting a cross shaft 36,
extending therebetween in parallel relation with
trans
Referring more in detail to the drawings:
I designates an envelope machine of the type
as illustrated in the above mentioned patent, and
which includes parallel side frames 2, having
60 suitable bearings for journaling the operating
the shaft of the pickup roller to mount an appli
cator roller 31 which normally bears upon , the 55
envelope blanks as they are conveyedacross the
support 9.
.
The applicatorroller is spaced from the pe
riphery of the pickup roller and the pickup roller
.is supported in such a‘ position that only, the
2
2,1 18,085
lower portion thereof moves in the body of gum,
however I provide for supporting the pickup roll
or out of contact with the gum whenever it be
comes necessary to suspend operation of the ap
plicator, as when adjusting the rollers to the size
of blanks being run through the machine. This
is accomplished by means of a lever arm 38 pivot
ally mounted on a pin 39, carried by the arm 25,
and having a depending portion 48 provided with
10 a laterally extending stop pin 4i adapted to en
gage a pin 42, which projects rearwardly from
the cross bar l3, as best shown in Figs. 1 and 5.
.
With the construction thus far described, the
pickup roller is rotated in an anti-clockwise di
rection, Fig. 2, to pick up and carry the gum to
the transfer roller, which is caused to rotate in
a clockwise direction incidental to its ?oating
contact with the pickup roller. A portion of the _
gum is then transferred from the pickup roller
by means of the transfer roller to the portion of
the applicator roller 31 with which the transfer
roller contacts, the applicator roller being driven
counter-clockwise, and in the same direction as
the movement of the envelope blanks.
In order to regulate the amount of gum picked
The opposite end of the lever extends upward
ly and terminates in a handle 43 wherewith the ‘ up by the roller 28, I provide a doctor roller 59
16
lever may be actuated to move the pin 4| to and that is mounted on a shaft 68, having its ends
rotatably
carried
in
eccentric
bearings
6|
and
from supporting position relatively to the pin 42.
The applicator roller 31 is of shorter length 62, which are in turn‘ rotatably positioned in
bearing bosses 63 and 64 carried by the arms 25
than the pickup roller, and is adapted for longi
and 26, as best shown in Fig. 1. The eccentrics
tudinal adjustment on its shaft so that a selec
are provided with lugs 65 and 86, having serrated
tive
portion
thereof
may
be
contacted
with
a
20
portions 61 to facilitate adjustment of the eccen
transfer roller 44, later described. The appli
cator roller, being formed of yieldable material, trics in the bearing bosses, when regulating the
such as rubber, automatically retains its adjusted contact pressure of the doctor roller with the
position on the shaft so that no other securing pickup roller to control the thickness of the gum
?lm being carried thereby to the transfer roller.
means is necessary.
The transfer roller 44 is formed of material The doctor roller is driven from the pickup roller
by means of a gear 68 ?xed on the opposite end‘
similar to that used in construction of the appli
cator roller, and is mounted on a shaft 45 that I of the shaft 22 from the gear 53, and which
meshes with a gear 69 on the adjacent project
ing end of the doctor roller shaft, as best shown
is ?oatingly supported between arms 46 and 4'1v
80 so positioned that the roller is supported in roll
ing contact with the surfaces of the applicator
and pick-up rollers 31 and 28, respectively. The
arms 46 and 41 are preferably formed of wire
like material having bent ends 46’ and 41' to
85 engage against the ends of the shaft 45 and have
their opposite ends ?xed in collars ‘I1 and ‘I8
4,0
that are longitudinally adjustable upon a rod 19
by means of set screws 88 and 8|, threadedly
mounted in the collars ‘I1 and ‘I8 and having
their shanks bearing against the rod ‘I9. In order
to permit ready removal and application of the
rod 19, it is provided with eyes 82 and 83 that
are adapted to engage over upwardly extending
?ngers 84 and 85 on a bracket 86 carried by the
roller supporting arm 26. The opposite end of
4.5 the rod is supported in horizontal alignment by
means of a bracket 81 ?xed to the other arm 25,
the bracket 86 having an opening 88 therein to
pass the end of the rod. Also adjustable on the
rod intermediate the collars ‘I1 and 18 are similar
50 collars 89 and 98 carrying depending curved arms
9| and 92 engaging the periphery of the trans
fer roller to retain it in rolling contact with the
55
surfaces of the pick-up and applicator rollers.
In order to drive the pickup and applicator
rollers, one of the conveyor shafts 3 is provided
with a sprocket wheel 48 that is operably con
nected with a similar sprocket 49 by means of a
chain belt 58 operating over the respective
80 sprockets. The sprocket 49 is mounted on a
stub'shaft 5l_ carried by the cross bar [3 and car
ries a pinion gear 52 in driving connection there
with. Fixed on one end of the pickup roller shaft
22 is a gear 253 meshing with the pinion gear
65 52 for rotating the pickup roller. The applicator
shaft is driven by a gear 55 meshing with an
idler gear 54, which is driven by the gear 58, the
idler gear being carried on a stub shaft 93 secured
to the arm 26.
70
If desired, the support 8 may be provided with
an opening 58 in which is mounted a roller 51
cooperating with the applicator roller to assure
positive movement of the blanks therebetween.
‘This latter roller is driven by a gear 58 which
76 meshes with the gear 55 as shown in Fig. 6.
in Fig. 1._
In adjusting the applicator to apply gum for
the full width of the sealing ?aps, one end of
the applicator roller is so located upon the shaft
36 that it aligns with one side edge of the sealing
flaps, and the opposite end of the transfer roller
is adjusted to align with the opposite ends of the
?aps. The transfer roller 44 is positioned by
loosening the set screws 88 and 8| and shifting
the collars 11 and 18 along the shaft so that ends 40
48' and 41' retain the roller in desired position.
The set screws 88 and 8| are then re-tightened.
The collars 89 and 98 are then spaced interme
diate the collars 11 and 18 so that the curved
arms 9| and 92 retain the transfer roller in ?oat 45
ing contact with the pick-up and applicator roll
ers'. It is thusapparent that the adjacent ends
of the rollers‘ overlap a distance corresponding
to the width of the flaps, thus the width of the
gum stripe as applied to the applicator roller is 50
only the width of the ?aps. The applicator roller
is then lowered into contact with the blanks by
releasing the pin 4| from engagement with the
pin 42.
.
The pickup roller is then supported in contact 55
with the gum contained in the pan l5, and the
gear 53 is in meshingv relation with the pinion
gear 52' to drive the pickup and doctor rollers so
that the gum picked up'by the rolleij28 is thinned
out and spread uniformly over the surface there-. 80
of by the doctor roller. The contact pressure
which regulates the thickness of the gum is ad
justed by manipulating the position of the eccen
trics in the bearing bosses.
The, doctor roller
distributes the gum in uniform thickness over 65
the surface of the pickup roller which carries
the gum to the transfer roller.
The transfer
roller upon picking up the gum, transfers it uni
formly to the contacting portion of the appli
cator roller, which roller, being driven .in the 70
same direction as the movement of the blanks,
deposits the gum on the exposed portions of the.
sealing flaps.
Because of the factthat the gum is uniformly
transferred by the transfer roller, it is applied 75
2,118,035
' uniformly across the entire width of the sealing
- ?aps so that all portions of the flaps dry uni
3
up roller, means supporting a body of gum in con
tact with the pick-up roller, means supporting
said pick-up roller in spaced relation with the ap
plicator roller, means for driving said rollers, a
formly, thereby obviating the curling and warp
ing tendencies above pointed out. Also due to the
fact that the gum is applied in desired thickness,
transfer roller ?oatingly supported in free rolling -
4 it is not necessary to apply heat thereto while the
contact with said pick-up and applicator rollers,
blanks are being moved through the'drying tun
a guide support carried in parallel relation with
the axis of said rollers, and guide arms adjustably
carried on, the guide support and engaging the
ends of the transfer roller to guidingly retain the 10
transfer roller in ?oating contact with said pick
nel, at least it is not necessary to heat the blanks
to as high a degree as required where the ?aps
10 contain excessive amounts of gum, as in the case
of present machines.
From the foregoing it is obvious that I have
provided a glue applicator wherewith the» glue
up and applicator rollers.
\
'
5. An apparatus for applying gum to the seal
may be selectively applied in predetermined ing ?aps of envelopes whilev being conveyed in,
15 quantities either across the entire width of the
overlapping relation with only the portions of the 15
sealing ?aps exposed to which gum is to be ap
plied, including an applicator roller, means sup
?aps, or to any selected portion thereof, depend
ing upon the relative positions of the transfer and
20
applicator rollers to each other and to the blanks.
What I claim and desire to secure ‘by Letters
porting the applicator roller in contact with ex
Patent is:
up roller, means supporting a body of gum in 'con
'
posed portions of the sealing ?aps, a gum pick
’
1. An apparatus for applying gum to the seal
ing flaps of, envelopes while, being conveyed in
overlapping relation with only the portions of the
sealing ?aps exposed to which the gum is to be
25 applied, including an applicator roller, means
supporting the applicator roller in rolling contact
with exposed portions of the flaps, a gum pick-up
the axis of said rollers, guide arms adjustably car- '
roller, means supporting a body of gum in con
ried. on the guide support and engaging the ends
of the transfer roller to guidingly retain the
transfer roller in ?oating contact with said pick 30
tact with the gum pick-up roller, means support-'
30 ing the pick-up roller in spaced relation with the
applicator. roller, means for driving said-rollers,
and a transfer roller ?oatingly supported in free
rolling contact with said pick-up and applicator
up and applicator rollers, and means for 'selec- -
tively limiting ?oating movement of the transfer
roller.
rollers to transfer gum from the pick-up roller ~
35 to the‘ applicator roller.
'
2. An apparatus for applying gum to the seal-.
ing ?aps of envelopes while being conveyed in
overlapping relation‘ with only the portions of the
sealing ?aps exposed to which the gum is to be
40 applied, including an applicator roller, means
supporting the applicator roller in rolling contact
with exposed portions of the ?aps, a gum pick-up
roller, means supporting a body of gum in contact
with the gum pick-up roller, means supporting
45 the pick-up roller in spaced relation with the ap
plicator roller, means for driving said rollers, a
transfer roller ?oatingly supported in free rolling
contact with said pick-up and applicator rollers
to transfer gum from the pick-up roller to the
50
20
tact with the pick-up roller, means supporting
said pick-up roller in spaced relation with the ap
plicator roller, means for driving said rollers, a
transfer roller ?oatingly supported in free rolling
contact with said pick-up and applicator rollers, a 25
guide support carried in parallel relation with
-
'
6. An apparatus for applying gum to the seal
ing ?aps of envelopes while being conveyed in 35
overlapping relation with only ‘the portions of the
sealing ?aps exposed to which gum is to be ap
plied, including an applicator roller, means sup
porting the applicator roller in rolling contact
with exposed portions of the ?aps, a backing 40
roller engagingthe opposite portions of the en
velopes to cooperate with the applicator roller
to effect positive movement of ‘the envelopes
therebetween, a gum pick-up roller, means sup
porting a body of gum in contact with the gum
pick-up roller, means supporting the pick—up
roller in spaced relation with the applicator
roller, means for driving said rollers, and a trans
fer roller ?oatingly supported in free rolling con
applicator roller, and means guidingly retaining tact with said pick-up and applicator rollers to
transfer gum from the pick-up roller to the
the transfer roller to apply the gum to a selec
tive area of the applicator roller.
‘
’
3. An apparatus for applying gum to the seal
55
applicator roller.
'
'7. An apparatus for applying gum to the seal- -
ing ?aps of envelopes while being conveyed in
overlapping relation with only the portions‘of the
ing ?aps of envelopes while being conveyed in
sealing flaps exposed to which the gum is to be
applied, including an applicator roller, means
sealing flaps exposed to which gum is to be ap
supporting the applicator roller in rolling contact
with exposed portions of the ?aps, a gum pick-up
overlapping relation with only the portions of the 65
plied-including an applicator roller, means-sup-'
porting the applicator roller in_rol1ing contact
with exposed_.portions of the flaps, a backing
roller engaging the opposite portions of the en
tact'with .the gum pick-up roller, means sup-0 velopes to cooperate with the applicator roller
porting the pick-up roller in spaced relation with to effect positive movement of the envelopes
the applicator roller, means for driving said roll
therebetween, a gum pick-up ‘roller, means sup-'
60 roller, means supporting a body of gum in con
ers, a transfer roller ?oatingly supported in free
65
rolling contact with said pick-up and applicator
rollers to transfer gum from the‘ pick-up-roller
to the applicator roller, and means for limiting
?oating movement of the transfer roller.‘
4. An apparatus for applying gum to the seal
70 ing ?aps of envelopes while being conveyed in
overlapping relation with only the portions of the
sealing ?aps exposed to which gum is to be ap
plied, including an applicator roller, means sup
porting the applicator roller in contact with
75 exposed portions of the sealing ?aps, a gum pick
porting a body of gum in contact withthe gum
pick-up roller,’ means supporting the pick-up roll
‘er‘in spaced relation with the applicator roller, _
means for driving said rollers, a transfer roller
?oatingly supported in free rolling contact with
said pick-up andapplicator rollers to transfer
gum from the‘pick-uproller to the applicator 70
roller, and means guidingly retaining the transfer
roller to apply gum to a selected area of the ap
plicator roller.
>
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EUGENE B. BERlKOWI'I‘Z. . t"
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