U.S. patent number 3,797,196 [Application Number 05/311,826] was granted by the patent office on 1974-03-19 for letter folder and envelope inserter.
This patent grant is currently assigned to Pitney-Bowes, Inc.. Invention is credited to Charles H. Harbison.
United States Patent |
3,797,196 |
Harbison |
March 19, 1974 |
LETTER FOLDER AND ENVELOPE INSERTER
Abstract
A letter folder and envelope inserter is described in a compact
housing assembly. Envelopes are automatically removed from a stack
and fed to an envelope stuffing station where a rotating roller
operative against the upper edge of the envelope pocket opens the
pocket. A paper enclosure such as a letter or invoice is
automatically folded by passage through pairs of folding rollers
and delivered over the pocket opening roller into the envelope
pocket. A compact assembly and control system is described for
operation of the folder-inserter.
Inventors: |
Harbison; Charles H.
(Birmingham, AL) |
Assignee: |
Pitney-Bowes, Inc. (Stamford,
CT)
|
Family
ID: |
23208664 |
Appl.
No.: |
05/311,826 |
Filed: |
December 4, 1972 |
Current U.S.
Class: |
53/55; 53/117;
53/569; 53/381.7 |
Current CPC
Class: |
B43M
3/045 (20130101) |
Current International
Class: |
B43M
3/04 (20060101); B43M 3/00 (20060101); B65b
057/06 (); B65b 063/04 (); B65b 043/22 () |
Field of
Search: |
;53/55,58,117,186,187,188,384 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McGehee; Travis S.
Attorney, Agent or Firm: Soltow, Jr.; William D. Scribner;
Albert W. Wittstein; Martin D.
Claims
What is claimed is
1. An apparatus for opening the pockets of empty envelopes having
closure flaps for sealing envelopes comprising
a roller having a paper edge gripping peripheral surface;
means for holding an envelope with the opening edge of the envelope
pocket in operative contact with the peripheral surface of the
roller; and
means for driving the roller into rotation to engage the opening
edge of the pocket of the held envelope and urge the pocket opening
away to open the pocket for stuffing with an enclosure.
2. The apparatus as claimed in claim 1
wherein the roller peripheral surface is formed of a resilient high
friction material and provided around the perimeter to form
circumferentially spaced ridges to sequentially engage the pocket
edge during roller rotation and open the envelope pocket.
3. The apparatus as claimed in claim 2
wherein said ridges are effectively defined by slots that extend
substantially parallel with the axis of rotation of the roller.
4. An apparatus for stuffing enclosures into pockets of envelopes
having closure flaps for sealing envelope pockets comprising
means for advancing enclosures towards an envelope stuffing
station;
means for advancing envelopes from a stack towards the envelope
stuffing station;
a pocket opening roller arranged for operative contact with the
opening edge of a pocket of an envelope;
means for rotating the pocket opening roller;
means for holding an envelope in stuffing relationship with an
enclosure that is advanced towards the envelope stuffing station
with the pocket edge of the envelope in contact with said rotated
opening roller to open the pocket and enable the stuffing of the
envelope pocket with said enclosure.
5. The apparatus for stuffing empty envelopes as claimed in claim 4
wherein the envelopes advancing means further includes
an envelope stack feeder shaped to receive a stack of envelopes
with their flaps in pocket closing position;
means for removing envelopes one at a time from the stack;
a flap engaging hook in operative contact with the front envelope
in the stack and below the edge of the closed flap with the flap
engaging hook being selectively shaped to catch the flap of an
envelope being removed to orient the flap to an open position prior
to arrival at the stuffing station.
6. The apparatus for stuffing empty envelopes as claimed in claim 5
wherein said holding means further includes
a pair of closely spaced rotating envelope feed rollers oriented to
receive envelopes removed from the stack;
means for sensing the passage of an envelope; and
means to terminate rotation of the envelope feed rollers when said
pocket opening edge is operatively engaged by the pocket opening
roller.
7. The apparatus for stuffing envelopes as claimed in claim 6
wherein said envelope sensing means is formed of an envelope trip
switch having a trip arm, said trip arm being selectively located
to be operatively engaged by the flap of a passing envelope, with
said means for terminating rotation including an envelope feed
drive responsive to the actuation of the envelope trip switch and
coupled to the envelope feed rollers.
8. The apparatus for stuffing envelopes as claimed in claim 7 and
further including
means for sensing the arrival of enclosures and producing a signal
indicative thereof; and
means effectively actuated by the enclosure arrival signal for
rotating the pocket opening roller to open an envelope held at the
envelope stuffing station.
9. The apparatus for stuffing envelopes as claimed in claim 8
wherein said enclosure advancing means further includes a plurality
of folding rollers and buckle chutes arranged to produce a folded
enclosure for stuffing into an envelope, with said pocket opening
roller driving means also being coupled to drive the folding
rollers.
10. The apparatus for stuffing envelopes as claimed in claim 9 and
further including
a timing motor provided with a plurality of cam controlled
switches, said timing motor being actuated by the enclosure arrival
signal, with one of said cam controlled switches being coupled to
latch operation of the timing motor for a predetermined cycle, and
with other cam controlled switches being coupled respectively to
the envelope feed drive and the pocket opening roller driving means
for operation thereof during selected portions of the predetermined
cycle.
11. The apparatus for stuffing empty envelopes as claimed in claim
7 wherein the stack of envelopes, the flap engaging hook, the
envelope trip switch and the envelope stuffing station are
generally arranged in a vertical orientation with the envelope
stuffing station at the bottom end.
12. An apparatus for folding enclosures to be stuffed into pockets
of envelopes having closure flaps for sealing the envelope pockets
comprising
an envelope stuffing station;
means for advancing envelopes from a stack towards the envelope
stuffing station;
means for holding an envelope with its pocket open to receive an
enclosure at the stuffing station;
means for detecting enclosures;
means for folding enclosures, said folding means including a
plurality of folding rollers arranged in a generally vertical line,
a first buckle chute located on one lateral side of the folding
rollers to form a first fold between a first pair of folding
rollers and a second buckle chute located on the other lateral side
of the folding rollers to form a second fold between a second pair
of folding rollers;
said stuffing station being located on said one side of the folding
rollers to receive the twice folded enclosure upon its emergence
from between the second pair of folding rollers.
13. The apparatus for folding and stuffing enclosures as claimed in
claim 12 wherein the stuffing station is located along a downwardly
inclined path from the second pair of folding rollers.
14. The apparatus for folding and stuffing enclosures as claimed in
claim 13 and further including
an enclosure infeed tray oriented with a downward incline in
alignment with a pair of folding rollers to feed enclosures towards
the first buckle chute;
an enclosure sensing element operatively disposed on the enclosure
infeed tray; and
means actuated by the enclosure sensing element for controlling the
operational cycle of the folding and stuffing apparatus.
15. A compact letter folder and envelope stuffing apparatus wherein
envelopes have a closure flap sized to overlap an outer edge of the
pocket of the envelope comprising
a housing having means for advancing letters along a letter feed
path and means for advancing envelopes along an envelope feed path,
said letter feed path and envelope feed path being respectively
oriented to feed letters and envelopes generally towards each other
to meet in stuffing relationship at an envelope stuffing
station;
letter folding means located along the letter feed path to receive
letters at one side and dispense folded letters from an opposite
side along the feed path in the vicinity of the envelope stuffing
station;
means located at the envelope stuffing station for retaining the
closure flap of an envelope with the pocket of the retained
envelope oriented to receive folded letters dispensed along the
letter feed path;
means, including a friction roller operatively located at the
stuffing station in contact with the outer pocket edge at the
inside of the envelope closure flap, for driving the friction
roller into rotation to urge the outer pocket edge away from the
retained closure flap and to stuff folded letters into the envelope
pocket.
16. The compact letter folder and envelope stuffing apparatus as
claimed in claim 15 wherein the letter folding means further
includes
a plurality of folding rollers each having an axis of rotation and
arranged with their axes of rotations generally coplanar; and
a pair of buckle chutes disposed on opposite sides of the plurality
of rollers and positioned to form double folded letters with the
unfolded letters entering one side of the feed rollers and being
dispensed on the opposite side with a double fold.
17. A compact enclosure folder and envelope inserter assembly
comprising
a housing having a plurality of dove-tail shaped parallel spaced
channels on opposite internal walls of the housing, with channels
on one wall being in predetermined alignment with the channels on
the other wall;
an enclosure feed located on one lateral end of the internal walls
and supported at a predetermined height along a channel;
an envelope feed located on another opposite lateral end of the
internal walls and supported at a predetermined height along a
channel, said envelope feed being sized and shaped to support a
stack of envelopes;
a plurality of folding rollers disposed in the path of the
enclosure feed and mounted along a common channel for general
coplanar mounting of their axes of rotation;
a pair of buckle chutes located on opposite sides of the folding
rollers to provide a double folded enclosure on the envelope feed
side of the plurality of folding rollers; and
an envelope inserter station disposed in the path of the folded
enclosures and envelopes, said station including an envelope pocket
opening roller mounted in a channel and supported therein at a
height selected to place the pocket opening roller in the path of a
double folded enclosure emerging from between a pair of folding
rollers, and a pair of envelope feed rollers each mounted in a
channel and spaced from each other to control the passing and
retention of envelopes relative to the pocket opening rollers, said
pocket opening roller and the envelope feed rollers being
selectively spaced along their channels to place edges of each
envelope pocket in contact with the pocket opening roller to insert
a folded enclosure into the pocket of an envelope.
18. The compact enclosure folder and envelope inserter assembly as
claimed in claim 17 wherein the envelope stuffing station is
located along a downwardly inclined path from a plurality of
folding rollers.
19. The compact enclosure folder and envelope inserter assembly as
claimed in claim 17 and further including
an enclosure sensing element for generating a signal representative
of the arrival of an enclosure to be inserted into an envelope;
an envelope sensing element selectively located to sense the
arrival of an envelope at the envelope inserting station; and
means actuated by the enclosure arrival signal for controlling the
feed of envelopes and the insertion of folded enclosures into
opened envelopes.
20. The compact enclosure folder and envelope inserter assembly as
claimed in claim 19 wherein said controlling means further
includes
a timing motor energized by the enclosure arrival signal, said
timing motor being provided with a plurality of cam controlled
switches actuated by the timing motor;
an enclosure drive motor operatively coupled to the folding rollers
and the pocket opening roller;
an envelope drive motor coupled to the envelope feed rollers;
and
with said enclosure drive motor and envelope drive motor being each
actuated by a cam controlled switch to initiate respectively an
enclosure folding and envelope feeding from the stack, with the
envelope sensing element being coupled to said envelope drive motor
to terminate feeding of an envelope upon its arrival at the
envelope insertion station.
Description
FIELD OF THE INVENTION
This invention relates to an apparatus for stuffing envelopes. More
specifically, this invention relates to an apparatus which
automatically folds an enclosure such as a letter or an invoice and
subsequently automatically inserts the folded enclosure into an
envelope.
BACKGROUND OF INVENTION
Devices for folding of enclosures such as letters and automatically
inserting these into envelopes have been previously described in
the art; see for example U. S. Pat. No. 2,771,726 which issued to
Owen et al. In this patent a letter is automatically folded by
feeding it through folding rollers oriented in a selected manner
with buckle chutes. The folded letter is then automatically
inserted with a reciprocating ram into an automatically opened
envelope. U. S. Pat. No. 2,766,569, which issued to Strother et al,
also describes a mail folder and envelope inserter. Other sheet
folders may be found in the art such as in U. S. Pat. No. 3,510,
122 to Gavaghan.
SUMMARY OF THE INVENTION
In an envelope stuffing apparatus in accordance with the invention,
an automatic envelope opener is employed wherein envelopes are
continually fed to an envelope stuffing station where a roller
engages the upper edge of the envelope pocket to open the pocket.
Enclosures are then fed over the roller into the pocket. The use of
an opening roller conveniently eliminates reciprocating envelope
opening elements and enables the formation of a compact envelope
stuffer.
As described with reference to a preferred embodiment for a letter
folder and envelope inserter in accordance with the invention,
folding rollers for forming a double fold are vertically arranged
to deliver a folded enclosure over an envelope opening roller into
an envelope pocket. The arrangement of the folding rollers and the
envelope stuffing station enhances the compactness of the
folder-inserter which is particularly suitable for use in offices
with copying machines.
As further described with respect to the preferred embodiment, the
assembly of the folder-inserter includes a housing having a
plurality of parallel channels in opposing side walls to retain
various components which form the apparatus.
It is, therefore, an object of the invention to provide a compact
envelope opener for automatic stuffing with enclosures such as
letters, folded sheets and the like. It is a further object of the
invention to provide a compact automatic letter folder and envelope
inserter.
BRIEF DESCRIPTION OF DRAWINGS
These and other advantages and objects of the invention will be
understood from the following description of a preferred embodiment
described in conjunction with the drawings wherein
FIG. 1 is a perspective view of a folder-inserter in accordance
with the invention in use with an office copying machine;
FIG. 2 is a vertical side section view of the folder-inserter shown
in FIG. 1;
FIG. 3 is a partial perspective broken away view of the
folder-inserter shown in FIG. 2;
FIG. 4 is a schematic of drive elements and control circuitry
employed in the operation of the folder-inserter of FIG. 2;
FIG. 5 is a timing diagram for several components employed in the
control circuitry shown in FIG. 4;
FIG. 6 is an enlarged perspective view of an envelope opener in
accordance with the invention; and
FIG. 7 is an enlarged side view of an operating envelope opening
roller in accordance with the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
With reference to FIG. 1, a folder-inserter 10 is shown mounted to
receive duplicates 12 from outfeed 14 of a copying machine 16.
Duplicate sheets 12 are deposited upon a downwardly inclined infeed
tray 18 which guides sheets 12 into the folder-inserter 10 at one
side of a housing 20. Envelopes 22 are stored on an infeed platform
24 located on another side of housing 20. The stuffed envelopes
emerge from a bottom outfeed 26 and are deposited on a removable
tray 28.
The folder-inserter 10 is shown mounted to the inside of a door 30
of a cabinet 32 on which copying machine 16 is placed. Housing 20
is formed with a pair of spaced parallel walls 34--34' having
internally faced dove-tail shaped channels 36 to retain the various
components such as infeed tray 18. The latter tray may be removed
by sliding it upwardly along its mounting channels 36. The
convenience and compactness of folder-inserter 10 may be
appreciated by virtue of the fact that folder-inserter 10 may be
stored in cabinet 32 after out-feed tray 28 and infeed tray 18 have
been removed and door 30 is closed.
Folder-inserter 10 is particularly useful in small offices which
require, for example, billing of a large number of clients on a
monthly basis. In such use an updated statement is fed into a
copying machine 16 which delivers a duplicate 12 of the statement
on in-feed tray 18. The duplicate slides down along infeed tray 18
into inserter-folder 10 which folds the duplicate into a size for
automatic stuffing into an envelope 22. Envelopes 22 are preferably
provided with a transparent window and the billing statement
includes an address at a location selected to appear through the
envelope window when folder-inserter 10 has stuffed an envelope.
Hence, the only remaining secretarial task is to seal and apply
postage to the envelopes.
In the section view of folder-inserter 10 in FIG. 2, a stack of
vertically seated envelopes 22 is shown with flaps 38 of envelopes
22 facing housing 20 and a flap engaging hook 40. A pair of primary
envelope feed rollers 42-42' are in contact with the front envelope
to drive it downwardly along path 44 and over a trip arm 45 of an
envelope sensing element such as a double pole switch 46 to an
envelope stuffing station 48. Path 44 is aligned so that envelopes
22 will pass between a pair of feed rollers 50-50'. The operation
of rollers 50-50' is so timed with the use of switch 46 that when
an envelope flap 38 passes between them and the upper edge 52 of
the envelope pocket 54 engages an envelope opening roller 56, the
envelope feed is stopped to await stuffing of an enclosure.
The envelope opening rollers 56 rotate in a direction indicated by
arrow 58 towards and against upper edge 52 which opens to receive
folded letters arriving through a channel 60 aligned to pass
letters over opening roller 56 into pocket 54.
Enclosures for envelopes 22 slide down in-feed tray 18 over a
trip-arm 62 of an enclosure sensing switch 64 to actuate control
circuitry as will be further described. Tray 18 is aligned with a
sheet folder 66 formed of four sets of folding rollers 68, 70, 72
and 74 and a pair of buckle chutes 76, 78. When sheet 12 is
deposited on tray 18, the sheet is passed between folding rollers
68, 70 which drive the front edge of the sheet up into the first
buckle chute 76. When the front edge engages stop 80, the sheet
buckles and the fold is passed between folding rollers 70, 72. When
the fold encounters stop 82 in the second buckle chute 78, the
sheet buckles again to form a second fold which passes between
folding rollers 72, 74 into channel 60. The twice folded sheet is
then passed between folding rollers 72, 74 into channel 60 and over
opening roller 56 into a waiting and opened envelope 22'.
The assembly of folder-inserter 10 utilizes channels 36 in walls
34-34' as shown in FIGS. 2 and 3. Channels 36 are T-shaped with
bracket retaining vertical slots 84 located between channels
36.
The mounting of components to walls 34-34' utilizes channels 36 and
slots 84 in a flexible and varied manner. Thus, folding roller 68
is mounted on end bearings 86-86', each of which has an outer
housing 88 shaped to fit in the wide segment of a channel 36.
Buckle chute 76, which is formed of a pair of laterally spaced
brackets 90, 92 is shaped so that bracket 90 has a vertical edge 94
mounted in a slot 84 and a horizontal extension 96 located in the
wide portion of a channel 36. The flap hook 40 is attached to a
horizontally disposed rod 98 which fits in a channel 36 and permits
pivot movement of hook 40. A Z-shaped envelope stack support
bracket 100 extends vertically along a channel 36 with an edge 103
captured by lip 104 of wall 34. One side 106 of Z-shaped bracket
100 seats against lip 104' to form a sturdy support for envelope
in-feed tray 24.
The folding rollers 68, 70, 72 and 74 are mounted in a common slot
to form a vertical arrangement for a compact sheet folder as shown
in FIG. 2. The location of buckle chutes 76, 78 on opposite sides
of the folding rollers facillitates the assembly of the sheet
folder into a compact structure.
The drive for the folding rollers is applied from a motor 110
through a timing belt 112 coupled both to folding rollers 74 and
pocket opening roller 56. The folding rollers 68, 70, 72 and 74 are
held in contacting relationship with a pair of end-located springs
114 (only one spring 114 being shown in FIG. 3). Springs 114 are
wrapped around bearing housings 88-88' to transfer the drive from
roller 74 to the other rollers.
The drive for envelope feeding is obtained from a motor 116 and a
timing drive belt 118 coupled to rollers 42, 50. Separate drive
motors 110, 116 are used to enable the folder-inserter to be
operated in a preferred cycle whereby envelopes are fed from their
stack position on tray 24 to the stuffing station 48 to await
arrival of a folded sheet. Instead of separate motors, a single
motor with a disengageable drive for the sheet folder 66 could be
used.
The operation of folder-inserter 10 may best be explained with
reference to the circuit shown in FIG. 4 and the timing diagram of
FIG. 5. A double poled power switch 130 controls the delivery of AC
line power to the folder-inserter 10 on lines 132, 134. Line 134 is
coupled to the power returns of envelope motor drive 116, enclosure
folder drive motor 110 and a timing motor 136.
Timing motor 136 drives a set of three cams (not shown) which
control respectively a latching cam switch 138, folder cam switch
140 and an envelope cam switch 142. The cams which control these
latter switches are of convential design and are shaped and
positioned to actuate the switches in the manner as explained with
respect to the operation of folder-inserter 10.
When power switch 130 is closed at time t.sub.1 (see FIG. 5), power
is applied to lines 132, 134, but no operation occurs until a
letter is dropped on in-feed tray 18 and slides down to actuate
normally open switch 64 at time t.sub.2. Closure of letter trip
switch 64 commences operation of timer cam drive 136, one of whose
cams causes a closure of latching switches 138 at time t.sub.3. As
soon as latching switch 138 has closed, power bypasses letter
switch 64 so that the timing motor maintains itself energized until
the end of the cycle.
Shortly after timing motor 136 has been energized, the letter
folder cam causes a closure of folder cam swtich 140 at time
t.sub.4. Thus, in turn, actuates folder drive motor 110 which
commences to feed the input letter through letter folder 66 towards
stuffing station 48. Removal of a letter from in-feed tray 18
reopens letter trip switch 46 at time t'.sub.2. Since the folder
cam switch 140 remains closed until a folded letter arrives at
stuffing station at about time t.sub.4 and since the envelope feed
has as yet not been energized, the first folded letter does not get
inserted into an envelope and emerges on tray 28 for inspection to
confirm a proper folding operation. Folder drive is terminated at
time t'.sub.4 when folder cam switch 140 is reopened.
At a time t.sub.5, following actuation of the folder drive,
envelope cam switch 142 is closed, initiating a feed of an envelope
towards stuffing station 48.
The front envelope 22 is moved down from its position on tray 24
along path 44. As the envelope is moved, its flap 38 catches on
hook 40 which retains a sufficient hold to rotate flap in the
direction of arrow 144 (see FIG. 2) and expose the pocket of the
envelope. Flap 38 is rotated into a plane parallel with the main
envelope so that envelope trip switch 46 remains actuated from the
time t.sub.6 when the envelope first passes over arm 45 until time
t'.sub.6 when flap 38 has cleared arm 45.
The envelope cam switch 142 was permitted to reopen at time
t'.sub.5 ; however, the actuation of double pole envelope trip
switch 46 maintains power to both envelope drive 116 and folder
drive 110 to continue to move an envelope and rotate envelope
opening roller 56.
when flap 38 clears envelope trip switch 46, the drive to envelope
feed rollers stops and the envelope is positioned as indicated in
FIGS. 2 and 6. The location of the trip arm 45 of switch 46 is so
selected that the upper edge 52 of envelope 22 remains in contact
with opening roller 56. The envelope remains at the stuffing
station until a folded sheet has been inserted during the next
cycle of operation.
At the end of the cycle, at time t.sub.7, the cam latch switch is
permitted to open again, thus terminating the cycle. When the next
letter is deposited on in-feed tray 18 and letter trip switch has
been actuated at time t.sub.8, the folder drive is again energized.
At this time, envelope opening roller 56 is rotated against edge 52
of pocket 54. Roller 56, as shown in FIG. 6, is formed of a pair of
rollers whose peripheries 150 are formed of a frictional material
such as soft rubber. The roller surfaces 150 carry small axially
aligned slots 152 sized to receive edge 52 of an envelope pocket
54. Slots 152 separate ridges 154 which peels pocket edge 52 away
from the main body of envelope 22 as shown in FIG. 7. This
continuous peeling action maintains pocket 54 open and enables a
folded letter to be passed over opening roller 46 and below
envelope feed roller 50 into pocket 54.
The rotation of opening roller 56 is the direction of arrow 58
conveniently cooperates to hold pocket 54 open and stuff a folded
sheet into the pocket. The insertion of a folded sheet 12 into an
envelope 22 occurs at about time t.sub.9 (see FIG. 5). After the
envelope has been stuffed, it remains at stuffing station 48 until
the envelope drive is energized at time t.sub.9. A new envelope is
then brought down from tray 24 and, at the same time, rotation of
envelope feed rollers 50-50' causes the stuffed envelope to be
dispensed at about time t.sub.10 before the next envelope arrives
at time t.sub.11.
Having thus described a folder-inserter in accordance with the
invention, its many advantages may be appreciated. The compact
channel assembly permits a convenient mounting suitable for use in
small offices. The use of a rotating roller for opening of the
envelope pocket cooperates to facilitate stuffing of the envelopes
since envelope opening and stuffing are obtained by a common
rotating element.
* * * * *