U.S. patent number 3,635,128 [Application Number 04/791,722] was granted by the patent office on 1972-01-18 for machines for making envelopes.
This patent grant is currently assigned to Garden City Envelope Company. Invention is credited to Joseph J. Dohnalik.
United States Patent |
3,635,128 |
Dohnalik |
January 18, 1972 |
**Please see images for:
( Certificate of Correction ) ** |
MACHINES FOR MAKING ENVELOPES
Abstract
An envelope-forming machine for making large diagonal seam
envelopes includes a flat horizontal bed, side-flap folders, a
rotary segmental applicator and a bottom-flap folder over the bed,
with presser carriages extending beneath the applicator shaft and
including a plurality of presser rollers disposed over the outer
edges of the path of travel of the envelope blanks and closely
adjacent to the outer edges of the applicator. The presser rollers
are mounted on stub shafts extending inward from a support, and a
thin cover plate extends over the inner side of each set of
rollers. The carriages are supported for vertical reciprocating
adjustment and horizontal sliding adjustment. The mechanism for
feeding the blank to the machine includes a rotary drum and two
sets of independently resiliently mounted rollers disposed in
opposite echelon arrangement for engaging the leading edges of a
blank for forming a diagonal seam envelope.
Inventors: |
Dohnalik; Joseph J. (Cook
County, IL) |
Assignee: |
Garden City Envelope Company
(Chicago, IL)
|
Family
ID: |
27081323 |
Appl.
No.: |
04/791,722 |
Filed: |
January 16, 1969 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
591995 |
Nov 4, 1966 |
3450009 |
Jun 17, 1969 |
|
|
Current U.S.
Class: |
493/266; 271/2;
493/475 |
Current CPC
Class: |
B31B
70/00 (20170801); B31B 2150/00 (20170801); B31B
2160/10 (20170801) |
Current International
Class: |
B31B
19/00 (20060101); B31b 001/08 (); B31b 001/62 ();
B31b 001/94 () |
Field of
Search: |
;93/36MM,52,61,61A,62,73,1E,63M,36.3,61AC ;271/2 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Morse, Jr.; Wayne A.
Parent Case Text
This is a division of application Ser. No. 591,995, filed Nov. 4,
1966.
Claims
I claim:
1. Envelope-forming apparatus comprising a generally horizontal
planar bed, means for conveying envelope blanks over said bed, a
rotary adhesive applicator positioned over said bed for applying
adhesive to such blanks being conveyed thereover, and a plurality
of elongated presser means disposed over said bed, with one of said
pressure means being disposed along and closely adjacent each outer
edge of said applicator, for engaging the opposite edges of blanks
as such blanks pass beneath said applicator, each of said elongated
presser means extending transverse the axis of rotation of said
applicator to engage such blanks prior, during and after their
passage beneath said applicator, and means mounting said pressure
means for vertical reciprocating movement toward and away from said
bed to permit adjustment of the clearance of said presser means
from said bed without interference with said applicator.
2. Envelope-forming apparatus as in claim 1 wherein said presser
means are mounted on rack and pinion supports, said racks being
disposed normal to said plane to provide such vertical adjustment
of said presser means.
Description
This invention pertains to machines for making envelopes and
particularly to apparatus adapted for forming large diagonal seam
envelopes in high-speed envelope-forming machines.
One type of a relatively large envelope which has obtained wide
acceptance and use is the so-called open side diagonal seam
envelope (sometimes identified as the cross-seam or baronial-type
envelope). There is a need for machines capable of producing such
envelopes economically and at high-production rates. Further, it is
desirable that such machines be highly flexible for producing
various modifications of these envelopes, such as with extensive
and/or multicolor printing and with or without windows, and that
the machines be readily adaptable for forming other types of
envelopes. Due to the substantial cost of such machines, one
desirable manner of obtaining the aforementioned capabilities is by
providing for convenient field or operator conversion of existing
high-speed machines between setups for forming diagonal-seam
envelopes and setups for forming other types of envelopes.
A machine presently in use for forming large open side
diagnonal-seam envelopes from appropriate blanks is the ("barge
Open End Envelope Machine" produced and sold by F. L. Smithe
Machine Co. Inc., Duncansville, Pa. This machine has a production
capacity on the order of 5,000-6,000 envelopes per hour. Another
machine presently in commercial use for forming relatively large
envelopes is identified as the "Medium Open End Envelope Machine"
(sometimes referred to herein as the MO machine) produced and sold
by said F. L. Smithe Machine Co. Inc. This machine is capable of
forming envelopes from blanks at rates on the order of about 18,000
envelopes per hour. This machine also has greater capabilities than
the Large Open End Envelope Machine in several other respects, such
as in applying printing to the blanks as the envelopes are being
formed. However, a conventional MO machine is not capable of
producing certain types of envelopes, notably diagonal-seam
envelopes.
It is an object of this invention to provide improvements in
machines for producing envelopes. Further objects of this invention
are to provide improved machines for forming large diagonal-seam
envelopes at high-production rates; to provide improvements for
increasing the flexibility of machines for forming envelopes; to
provide for producing open side diagonal seam envelopes on an
MO-type machine; and to provide improvements permitting convenient
field conversion of such machines for forming various types of
envelopes, including diagonal-seam envelopes. Further and
additional objects and advantages will appear from the description,
accompanying drawings and appended claims.
For reference in discussing envelope sizes, it may be noted that a
conventional MO machine is adapted for making open end center seam
envelopes in sizes of about 5" to about 12" in width and about 7"
to about 151/2" in length. The machine also may be used for making
open end single side-seam envelopes on the order of 9" in width.
Such an MO machine modified in accordance with the present
invention may be utilized for making open side diagonal-seam
envelopes of the same or slightly larger sizes, i.e., about 6" to
about 121/2" wide and about 7" to about 91/2" in length.
While the invention is disclosed and described herein with respect
to the production of diagonal-seam envelopes on an MO machine
modified in accordance with this invention, such a modified machine
is also adapted for use in forming open side double side-seam
envelopes (sometimes identified as booklet-type envelopes) with
substantially the same setup as for forming diagonal-seam
envelopes. Further, this modified machine may be readily converted
for forming the various types of envelopes for which it is
conventionally adapted. In each instance the modified machine
retains its basic structure and manner of operation in that each
blank is or may be moved through a seal flap gummer, a dryer,
printing stations, a window cutter and a glassine applicator in a
flat, open condition, with the bottom flap at the leading edge and
then through flap-closing and envelope-discharge apparatus.
In accordance with one illustrative form of this invention, as each
envelope blank is conveyed through the flap-closing apparatus it
first moves through folding apparatus for folding the side flaps
over the body, then through a gummer station where a rotary
segmental adhesive applicator die positioned over the conveyor
applies adhesive to the appropriate edges of the infolded side
flaps, and finally through a bottom flap folder which folds the
bottom flap over the adhesive areas on the side flaps to complete
the blank. Presser carriages at each end of the applicator engage
the edges of the blank as it passes through the gummer station. The
folding and gumming of the side flaps and the folding of the bottom
flap all occur as the blank moves in a one linear direction, with
the blank moving in a single plane through these stations.
For a more complete understanding of this invention reference
should now be had to the embodiment illustrated in the drawings by
way of example of the invention.
In the drawings:
FIG. 1 is a schematic diagram of a machine for making envelopes and
employing teachings of this invention;
FIG. 2 is a cross-sectional view of a carriage mechanism employing
teachings of this invention, taken generally along line 2--2 of
FIG. 3;
FIG. 3 is a cross-sectional view taken generally along the line
3--3 of FIG. 2;
FIG. 4 is a perspective view of the adhesive-applying mechanism of
a machine employing teachings of this invention;
FIG. 5 is a side elevation view of the mechanism of FIG. 4;
FIG. 6 is a plan view of a blank for forming a large, open side
diagonal-seam envelope;
FIG. 7 is a plan view of the blank of FIG. 6 with the side flaps
folded in;
FIG. 8 is a plan view of an open end double side-seam envelope;
FIG. 9 is a plan view of the conveyor, side flap folders and
adhesive applicator of the mechanism of FIGS. 4 and 5;
FIG. 10 is a side elevation view of an improved envelope-feeder
element;
FIG. 11 is a top plan view of the element of FIG. 10;
FIG. 12 is an end view of a portion of the feed mechanism of a
machine as in FIG. 1 and employing the improved feeder element of
FIG. 10; and
FIG. 13 is an elevation view of a portion of the mechanism of FIG.
12.
The invention is illustrated as applied to modify an MO machine for
forming large open side diagonal-seam envelopes from appropriate
blanks B, see FIG. 6. Each blank B includes a body portion 10, a
seal flap 12, two side flaps 14 and 16, and a bottom flap 18. The
flaps are jointed to the body portion along fold lines 12a, 14a,
16a and 18a, respectively, as illustrated.
Referring to FIG. 1, the machine 20 includes an envelope feeder 22,
for instance of the general type shown in Novick, U.S. Pat. No.
2,954,225. The feeder 22 feeds blanks B to conveyor belts at 24
which carry the blanks through a seal flap gummer 26. The blanks
then are carried by dryer chains 28 through a drying station
including heating elements 30. After drying of the adhesive on the
seal flaps 12, the blanks move along the conveyor system of the
upper portion of the machine where they may be subjected to
suitable printing elements at the printing station 32 and/or a
window-cutting mechanism at 34 and a window applicator at 36.
Thereafter the blanks are conveyed along the upper surface of a
flat conveying bed at 38, with the inner surface of the blank
upward, the bottom flap extending in the direction of movement (to
the right in FIG. 1), and the side flaps 14 and 16 extending to the
sides of the blank as in FIG. 6. As they move over bed 38 the
blanks pass through a side flap folding station at 40 where the
side flaps are folded inwardly over the body 10 as shown in FIG. 7,
then through a gummer station 42 where adhesive is applied to the
upwardly exposed edges 16b and 14b of the side flaps (see FIG. 7)
and through the bottom flap folder 44 where the bottom flap 18 is
folded over the body 10 with its edges overlying the gummed edges
16b and 14b and is pressed against these edges. The completed open
side envelope is then removed from the machine, as by a conveyor
(not shown) moving laterally of conveyor 38 at the right of the
bottom flap folder 44 in FIG. 1.
Referring now to FIGS. 5 and 9, the conveyor 38 is of conventional
construction comprising a support bed with a generally planar upper
surface and a plurality of drive rollers 46 and 48 having their
uppermost peripheral edges projecting slightly above the upper
surface of the support bed. A presser belt 50 is supported with a
flight contiguous to the upper surface of the bed between rollers
48 to assist in moving the blanks over the bed 38. Presser plates
52 overlie the rollers 48 at each side of belt 50 and extend to
points adjacent the adhesive applicator 42 to assist in maintaining
the envelope blanks which pass thereunder flat and in frictional
engagement with the underlying rollers.
Side folders 56 and 58, together with folder wires 60 and 62 fold
the side flaps 14 and 16 over the body 10 as the blank is conveyed
through the side flap folding station 40. Each side flap folder
includes elements to engage, lift, crease and fold the side flaps
inwardly over the body 10 as is generally known in the art.
However, the folders 56 and 58 are preferably extended, as by
including auxiliary plates 56a and 58a on the plowshares 56b and
58b. Folder wires 60 and 62 are positioned in accordance with the
size of the envelope blank, and thus the width of the flaps being
folded.
With particular reference now to FIGS. 4 and 5, the gummer
apparatus 42 includes a gum box 70 which may be of conventional
construction. The illustrated gum box includes a reservoir roller
72 journaled to rotate with its lower portion in adhesive in a
reservoir 74, with a scraper or doctor blade 76 adjustably mounted
as by thumb screws 78 for controlling the thickness of adhesive on
reservoir roller 72. The reservoir roller 72 transfers a quantity
of adhesive to the surface of transfer roller 80, which in turn, is
effective to distribute the adhesive to rotary applicators 82a and
82b as indicated in FIG. 5.
The gum box 70 is mounted on a crossbar 84 which is secured to two
vertical supports 86. As illustrated in FIG. 5, the lower portion
of each of these vertical support bars 86 may include a rack
section which engages a pinion 88 supported on the machine frame
90. A handle or other suitable means is provided for rotating the
pinions 88 and thus for effecting vertical movement of the gum box
70 between the upper retracted position of FIG. 4 and the lower
operative position of FIG. 5. Adjustable stop screws 92 are
provided in the ends of bar 84 to abut frame elements of the
machine when the gum box is lowered and serve as gauges for
positioning the transfer roll 80 in appropriate contact with the
applicator segments 82a and 82b.
The applicator segments 82a and 82b are mounted on a shaft 94 and
comprise appropriate opposed helical segments of a cylindrical
surface to apply adhesive in the V-shaped pattern of the edge
portions 14a and 16b of the infolded side flaps 14 and 16 (see FIG.
7). The shaft 94 is driven by a sprocket 95 in suitable timed
relation with the movement of envelope blanks therebeneath to apply
adhesive to the desired area of each such blank. Referring
particularly to FIG. 5, each end of shaft 94 is journaled in a
block 96 supported on a compression spring 98 in a guideway in a
side support plate 99, with an adjustable abutment screw 100 for
effecting fine vertical adjustment of the block 96 and thus of the
applicator segments 82a and 82b. Gear 101 on shaft 94 engages a
gear (not shown) on the shaft of roller 80 to drive the gum box
rollers.
A convex recess (not shown) may be provided beneath the applicators
82a-82b to avoid application of gum to the underlying bed in the
event of a missed blank. Alternatively, other known arrangements
may be included to allow for missed blanks.
With reference now to FIGS. 2, 4, 5 and 9, a first pair of roller
carriages 102 and 104 are mounted at the infeed side of the gummer
station, and a second pair of carriages 106 and 108 are supported
at the output side of the gummer station. The two carriages at each
side of the bed are aligned with one another (see FIG. 9) and
extend beneath the drive shaft 94 to points closely adjacent one
another, whereby each aligned pair 102-106 and 104-108 forms an
essentially continuous articulated carriage assembly at the
respective side of the adhesive application station. The area over
the folders, between the presser belt and the gummer apparatus, is
thus open to permit unobstructed folding of wide side flaps such as
flaps 14 and 16.
The construction of the illustrated presser carriages will be
described with reference to the carriages 104 and 108, it being
understood that carriages 102 and 106 are of identical though
reversed construction, being right-hand units instead of left-hand
units as in the instance of carriages 104 and 108.
Referring first to carriage 104 in FIGS. 2 and 3, a carriage
bracket 110 includes an upright post portion 112 secured to a rack
section 114 which is slidably received in a vertical slideway 116
in a carriage slide 118. The rack 114 engages a splined pinion
shaft 120 (see also FIG. 4). A mounting bar 122 is secured to the
carriage bracket 110 by a plurality of cap screws 124, and a
carrier plate 126 is mounted on the bar 122. A plurality of roller
brackets 128 are journaled on studs 130 which are mounted on
support plate 126 and project toward a cover plate 132 on the
opposite side of the carriage. Each roller bracket 128 carries a
roller 134 freely rotatably journaled on a stub shaft 136 supported
on the respective bracket. A compression spring 138 is confined
between the support bar 122 and the distal or free end of each
bracket 128 to urge the respective roller 134 downwardly against
envelope blanks which pass between the roller and the underlying
conveyor bed. Thus, the rollers assist in creasing the blanks along
the side flap fold lines and insure frictional drive-engagement
between the blanks and the underlying driven rollers of the
conveyor.
It will be noted that each roller 134 is supported entirely by the
support plate 126 and that this support plate is disposed on the
outward side of the carriage 104. The inner plate 132 serves only a
covering and guard function, e.g., to prevent adhesive on the
applicator segments and/or on the envelope blanks from coming into
contact with the rollers. Accordingly, the plate 132 may be of very
thin material and may be positioned closely adjacent the inner
surface of the rollers 134. This permits the outermost edges of the
adhesive applicators 82a and 82b to be operated very close to the
inner edges of the rollers 134 whereby the adhesive may be applied
very close to the outer edges of the envelope blanks which are
gripped beneath the rollers 134.
Carriage 106 is of substantially the same construction as described
above regarding carriage 104 and includes a carriage bracket 140
having a vertical post section 142 joined to a rack segment 144 and
slidably engaged in a vertical slideway 146 extending through a
carriage slide 148. The rack segment 144 meshes with a splined
segment of a pinion shaft 150 (see also FIG. 4). A support bar 152
is joined to carriage bracket 140 by capscrews 154 and carries a
support plate 156. Roller brackets 158 are mounted on studs 160
secured to the support plate 156. Rollers 164 are journaled on stub
shafts 166 which are mounted on brackets 158, and compression
springs 168 are confined between support bar 152 and the outer ends
of brackets 158 to urge the rollers 164 downward against envelope
blanks passing therebeneath. A thin cover plate (not shown),
corresponding to cover plate 132, extends parallel to support plate
156 at the opposite side of the rollers 164.
Parts of the carriages 102 and 106 are referred to herein by the
same numerals as used in describing corresponding parts of
carriages 104 and 108, but with prime notations added, e.g.,
110'.
Referring now to FIG. 4, the carriage slides 118 and 118' are
slidably supported on a support bar 170 extending across the bed
38. Slides 118 and 118' are fixed in any given lateral position on
bar 170 by clamping screws 172 and 172'. The carriage slides 148
and 148' are supported in the same manner on a transverse support
bar 174, being secured in the desired lateral position through hand
screws as at 176 (see FIG. 2). It will be appreciated that the
slidable engagement of the four carriage slides on bars 170 and 174
and the slidable engagement of the corresponding racks on the
splines of pinion shafts 120 and 150 permit lateral adjustment of
the carriages 102 and 104 for convenient adjustment to envelopes of
various widths. It will be appreciated that an individual pinion
gear may be provided for each carriage, with such gears being
slidably mounted on drive shafts of appropriate configuration in
place of the shafts 120 and 150.
Rotation of pinion shafts 120 and 150 effects vertical adjustment
of the respective pairs of carriages. Handles may be provided on
the ends of the pinion shafts, as at 178, 178', 180 and 180' (see
FIG. 5) for convenient rotation of these shafts by the operator
from either side of the machine. Suitable locking means also may be
provided for securing the shafts in a desired position of vertical
adjustment of the various carriages.
The carriages 102-108, in their vertical adjustment, reciprocate
along paths normal to the axis of rotation of the adhesive
applicators 82a and 82b, and thus parallel to the plane of rotation
of the outer ends of these applicators. Any preset clearance
between the carriages and the applicators will be maintained as the
carriages are raised and lowered. This avoids any danger of
damaging the machine due to interference of these parts should an
operator start the machine with the carriages raised or attempt to
adjust the carriages vertically while the applicators are rotating.
Accordingly, the machine safely may be set up for operation with
very little clearance between the outermost edges of the adhesive
applicators and the inner surfaces of the carriage guard plates.
Considering further that the guard plates are formed of thin
material and are closely adjacent the presser rollers, adhesive may
be applied to the blanks closely adjacent the edges gripped beneath
the presser rollers, i.e., close to fold lines 14a and 16a in FIG.
7.
Referring to FIG. 5, the bottom flap folder 44 may be of a type
known in the art. For instance, the illustrated folder normally
includes a lifter comb (not shown) journaled just beneath the upper
surface of bed 38 and which moves upward briefly as each successive
envelope blank approaches to direct the leading edge of a bottom
flap upward along the forward face of bottom flap skids 180. As the
bottom flap fold line 18a approaches the lower end of the skids
180, tucker blades 182 mounted on a pivot shaft 184 assist in
folding the blank B at line 18a and in feeding this fold between
the lower ends of skids 180 and the upper surface of bed 38.
Thereupon, the continued movement of the envelope, to the right in
FIG, 5, results in folding of the bottom flap over the infolded
side flaps. Appropriate means are provided to press the bottom flap
against the underlying side flaps to complete the adhesion of the
overlapping edges of the three flaps.
The feed mechanism illustrated in FIGS. 12 and 13 is a part of a
feeder of the general structure and arrangement shown in the Novick
U.S. Pat. No. 2,954,225 as aforenoted. The illustrated components
include a drum 200, feed belts 202, 204 and 206, with suitable
support rollers as illustrated, guide arms 208, deflectors 210, a
stationary shaft 212, a rocker lever 214 mounted on shaft 212, a
rocker arm 216 also mounted on shaft 212, a rod 217 connecting
rocker 216 with deflector 210, track cams (not shown) mounted on
shaft 218 for actuating rockers 214 and 216, and arms 220 pivotally
mounted on pins 222. The illustrated components, in cooperation
with other elements (not shown) withdraw envelope blanks one at a
time from a stack of blanks supported above drum 200 and feed these
blanks between the belts 202 and 204. The belts 204 and 206, which
comprise the conveyor belts 24 of FIG. 1, then feed the blanks
through the seal flap gummer 26, and thereafter deliver them to the
chains 28 for conveying to the drying station.
Referring more particularly to FIG. 13, there are two arms 220,
comprising right and left-hand versions designated as 220 and 220'.
Arm 220 is illustrated in greater detail in FIGS. 10 and 11.
Referring thereto, a base arm 221 supports three fingers 222, 224
and 226 journaled on a lateral shaft 228. Pressure rollers 230, 232
and 234 are journaled on stub shafts mounted in the outer ends of
the respective fingers 222, 224 and 226. The central finger 224 is
provided with a substantially square end at 227 which is disposed
adjacent a corresponding surface or shoulder on the base arm 221
whereby finger 224 has rather limited pivotal movement about the
axis of shaft 228. Fingers 222 and 226 are freely pivoted on shaft
228 and are urged downward, into contact with drum 200 by leaf
springs 236 and 238. These springs are secured at one end to arm
220 by rivets 240, the outer end of spring 236 bearing on the outer
end of finger 222 and the outer end of spring 238 bearing on the
outer end of finger 226. A stud 242 is engaged by a tension spring
244 (see FIG. 12) which urges the outer end of arm 221, and thus
the rollers 230, 232 and 234 toward drum 200. The mounting
arrangement for the fingers 222, 224 and 226 insures that all three
rollers will conform to and remain in yielding contact with the
surface of the drum 200.
As will be seen in FIG. 13, arm 220' is of the same construction as
arm 220 except that the three rollers 230', 232' and 234' thereon
are disposed in opposite echelon arrangement. The angular
arrangement of the two sets of rollers on arms 220 and 220'
conforms to the included angle between the two sides of the leading
edge of bottom flap 18 whereby this type of pointed flap will be
engaged by all six rollers of the arms 220 and 220' for improved
positive feeding of this type of blank by the feed mechanism
22.
It will be obvious that other modifications of the specific
embodiment shown may be made without departing from the spirit and
scope of this invention.
While the illustrated machine 20 is adapted for forming
diagonal-seam envelopes, it readily may be converted to the
formation of double side-seam envelopes D (FIG. 8) by the
substitution of appropriate adhesive applicator segments on shaft
94. An added advantage is that the machine also may be converted
for use in forming other envelopes in its conventional manner of
operation simply by raising the gum box unit 70 to an inactive
position as shown in FIG. 4 and utilizing the gummer normally
positioned beneath bed 38 ahead of the side flap folding station 40
(to the left of folding station 40 in FIG. 1). Thus the present
improvements increase the flexibility of the machine 20 by
providing for its use in forming additional types of envelopes
without in any way impeding or impairing its use for forming
envelopes in accordance with its original design.
It will thus be seen that the aforenoted objects have been met.
While a particular embodiment of the invention has been shown, it
will be understood, of course, that the invention is not limited
thereto since modifications may be made by those skilled in the
art, particularly in light of the foregoing teachings. Therefore,
it is contemplated by the appended claims to cover any such
modifications as incorporate those features which may be said to
constitute the essential features of these improvements, within the
true spirit and scope of the invention.
* * * * *