U.S. patent application number 11/950104 was filed with the patent office on 2008-09-04 for banded envelopes.
This patent application is currently assigned to MEADWESTVACO CORPORATION. Invention is credited to David J. Carrigan, Witold Misiaszek.
Application Number | 20080210583 11/950104 |
Document ID | / |
Family ID | 36060621 |
Filed Date | 2008-09-04 |
United States Patent
Application |
20080210583 |
Kind Code |
A1 |
Carrigan; David J. ; et
al. |
September 4, 2008 |
BANDED ENVELOPES
Abstract
An envelope package including a plurality of generally aligned
envelopes, the plurality of envelopes being compressed together.
The package further includes a generally non-elastic band extending
around the plurality of compressed envelopes and retaining the
envelopes in a state of compression. Each envelope is generally
flat and planar in the absence of outside forces, and the band
retains the plurality of envelopes in a limited state of
compression such that none of the banded envelopes are pulled out
of plane by more than about 1/40 of the length of that envelope to
reduce warpage thereof.
Inventors: |
Carrigan; David J.; (Somers,
CT) ; Misiaszek; Witold; (West Warren, MA) |
Correspondence
Address: |
THOMPSON HINE L.L.P.;Intellectual Property Group
P.O. BOX 8801
DAYTON
OH
45401-8801
US
|
Assignee: |
MEADWESTVACO CORPORATION
Raleigh
NC
|
Family ID: |
36060621 |
Appl. No.: |
11/950104 |
Filed: |
December 4, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
11224475 |
Sep 12, 2005 |
7310922 |
|
|
11950104 |
|
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|
|
60609293 |
Sep 13, 2004 |
|
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|
60616171 |
Oct 5, 2004 |
|
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Current U.S.
Class: |
206/215 ;
206/83.5 |
Current CPC
Class: |
B65B 65/003 20130101;
B65B 25/14 20130101; B65B 27/086 20130101; B65B 5/105 20130101;
B65B 13/20 20130101 |
Class at
Publication: |
206/215 ;
206/83.5 |
International
Class: |
B65D 71/06 20060101
B65D071/06; B65D 85/00 20060101 B65D085/00 |
Claims
1. An envelope package comprising: a plurality of generally aligned
envelopes, said plurality of envelopes being compressed together;
and a generally non-elastic band extending around said plurality of
compressed envelopes and retaining said envelopes in a state of
compression, wherein each envelope is generally flat and planar in
the absence of outside forces, and wherein said band retains said
plurality of envelopes in a limited state of compression such that
none of the banded envelopes are pulled out of plane by more than
about 1/40 of the length of that envelope to reduce warpage
thereof.
2. The envelope package of claim 1 wherein said band retains said
plurality of envelopes in a state of compression such that said
plurality of envelopes exert an expansion force of at least about
1/2 pound.
3. The envelope package of claim 1 wherein said band retains said
plurality of envelopes in a state of compression such that said
plurality of envelopes are compressed at least about 10% from their
uncompressed state.
4. The envelope package of claim 1 wherein each envelope includes a
cavity having a throat and a flap which can selectively cover said
throat.
5. The envelope package of claim 4 wherein each flap includes an
adhesive located thereon such that each flap can be adhered to a
body of an associated envelope to thereby seal the associated
envelope.
6. The envelope package of claim 1 wherein each envelope is
generally rectangular in front view and has a plurality of outer
edges, and wherein the outer edges of each envelope are generally
aligned such that said plurality of envelopes form a generally
rectangular prism.
7. The envelope package of claim 1 wherein said plurality of
envelopes are compressed in a direction generally perpendicular to
said plane of each envelope.
8. The envelope package of claim 1 wherein said band is made of a
generally air-impermeable material.
9. The envelope package of claim 1 wherein said band has a width of
at least about 1 inch.
10. The envelope package of claim 1 wherein said band extends
around the center of said plurality of envelopes.
11. The envelope package of claim 1 wherein said band includes a
marking thereon.
12. The envelope package of claim 11 wherein said marking is
located a predetermined distance from a side edge of said plurality
of banded envelopes such that the marking is utilizable by a
vision-guided robot or an optical recognition machine to determine
the location of the side edge of said plurality of banded
envelopes.
13. The envelope package of claim 1 further including a
supplemental band extending around the plurality of envelopes and
spaced apart from said band such that said band and said
supplemental band together retain said plurality of envelopes in a
state of compression.
14. The envelope package of claim 1 wherein said plurality of
envelopes includes at least about 50 envelopes.
15. The envelope package of claim 1 wherein each envelope is
generally flat and rectangular in front view and includes four
outer edges, and wherein said band extends only around two of said
outer edges of inner ones of said envelopes such that said inner
ones of said envelopes each have two unbanded edges.
16. An envelope package comprising: a plurality of generally
aligned envelopes, said plurality of envelopes being compressed
together; and a generally non-elastic band extending around said
plurality of compressed envelopes and retaining said envelopes in a
state of compression, and wherein said plurality of envelopes exert
an expansion force of at least about 1/2 pound such that said
plurality of envelopes are sufficiently compressed to generally
seal ambient air out of said plurality of envelopes to thereby
reduce absorption of moisture and warpage thereof.
17. The envelope package of claim 16 wherein said band retains said
plurality of envelopes in a limited state of compression such that
none of the banded envelopes are pulled out of plane by more than
about 1/40 of the length of that envelope to reduce warpage
thereof.
18. An envelope package including: a plurality of generally aligned
envelopes, said plurality of envelopes being compressed together;
and a generally non-elastic band extending around said plurality of
compressed envelopes and retaining said envelopes in a state of
compression, wherein said band retains said plurality of envelopes
in a state of compression such that said plurality of envelopes are
compressed at least about 10% from their uncompressed state such
that said plurality of envelopes are sufficiently compressed to
generally seal ambient air out of said plurality of envelopes to
thereby reduce absorption of moisture and warpage thereof.
19. The envelope package of claim 18 wherein said band retains said
plurality of envelopes in a limited state of compression such that
none of the banded envelopes are pulled out of plane by more than
about 1/40 of the length of that envelope to reduce warpage
thereof.
Description
[0001] This application is a divisional application of U.S.
application Ser. No. 11/224,475, and claims priority to provisional
application Ser. No. 60/609,293 filed on Sep. 13, 2004, and
provisional application Ser. No. 60/616,171 filed on Oct. 5, 2004.
The entire contents of all of these applications are hereby
incorporated by reference.
[0002] The present invention is directed to banded envelopes, and
more particularly, to envelopes which are banded together in a
compressed state.
BACKGROUND
[0003] Existing envelope manufacturing machinery can create large
numbers of envelopes at a rapid rate. Such machinery creates stacks
of envelopes for subsequent packaging, shipping and processing. The
envelopes are then shipped to a customer or end user which may
stuff inserts into the envelopes, affix postage, and enter the
envelopes into a mail or package delivery system. The envelope
inserting and processing is typically carried out by automated
envelope inserting machinery.
[0004] In order to ensure proper operation of the envelope
inserting machinery, the envelopes processed by the machinery
should be uniform and meet sufficient quality control standards. In
particular, after their formation envelopes may be prone to
absorbing moisture from the ambient air, which causes warping of
the envelopes. The absorption of moisture and warping of the
envelope over time is known as "propellering." Propellering of the
envelopes can cause the opposing corners of the envelopes to twist
away from each other in the fashion of a propeller, which can cause
the envelopes to be improperly fed into and/or improperly processed
by the envelope inserting machinery. This can lead to jamming or
malfunction of the envelope inserting machinery, which increases
down time and lowers efficiency. Most of the moisture absorbed by
the envelopes takes place after formation and packaging of the
envelopes, while the envelopes are in storage, being shipped, or
awaiting insertion.
[0005] High-speed envelope manufacturing equipment and inserting
equipment requires operators to manually handle or lift
considerable amounts of material over the course of a shift. This
labor can occur in either manufacturing an envelope or in inserting
contents into an envelope. Reducing or eliminating the physical
labor in these processes can reduce fatigue and thereby allow
workers to maintain higher levels of production for longer periods
of time. Thus, minimizing or eliminating repetitive physical
activity during these operations will reduce operator fatigue and
repetitive motion injuries.
SUMMARY
[0006] In one embodiment, the present invention is a method for
packaging envelopes which reduces absorption of moisture, thereby
reducing warpage and ensuring more consistently flat envelopes. In
particular, the present invention may involve compression-packaging
a plurality of envelopes together, and retaining the envelopes in a
state of compression by use of at least one band. The banded
envelopes are thereby relatively sealed to keep moisture and air
away from the banded envelopes. In addition, the bands provide
various other advantages in processing, storing and shipping the
packaged envelopes.
[0007] More particularly, in one embodiment the invention is a
method for processing envelopes including the steps of providing a
plurality of generally aligned envelopes and compressing the
plurality of envelopes together. The method further includes the
step of placing a band around the compressed envelopes such that
the band retains the plurality of envelopes in a state of
compression.
[0008] In another embodiment the invention is an envelope package
including a plurality of generally aligned envelopes, the plurality
of envelopes being compressed together, and a generally non-elastic
band extending around the plurality of compressed envelopes and
retaining the envelopes in a state of compression.
[0009] In another embodiment the invention is a system for
processing envelopes including an envelope delivery mechanism
configured to deliver a plurality of envelopes to a support surface
to thereby form a generally aligned stack of envelopes. The system
also has a bander configured to form a band around the stack of
envelopes such that the band retains the stack of envelopes in a
state of compression.
[0010] In yet another embodiment the invention is a method for
handling a package of banded envelopes including the step of
providing a package of envelopes including plurality of generally
aligned compressed envelopes. The package further includes a
generally non-elastic band extending around the plurality of
envelopes and retaining the envelopes in a state of compression.
The method further includes the step of moving the package of
envelopes.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1A is a front view of an unassembled envelope;
[0012] FIG. 1B is a front view of the envelope of FIG. 1A, shown in
an assembled state;
[0013] FIG. 2A is a top perspective view of a packaging box
including a plurality of envelopes received therein;
[0014] FIG. 2B is a top perspective view of a shipping box
including a plurality of the packaging boxes of FIG. 2A received
therein;
[0015] FIG. 3A is a front perspective view of a package of banded
envelopes;
[0016] FIG. 3B is a rear perspective view of the package of FIG.
3A;
[0017] FIG. 3C is a top view of the package of FIG. 3A;
[0018] FIG. 3D is a front perspective view of an envelope
dispenser;
[0019] FIG. 3E is a front perspective view of the envelope
dispenser of FIG. 3D receiving four envelope packages therein;
[0020] FIG. 4 is a stack of a plurality of envelope packages;
[0021] FIG. 5 is a front perspective view of another embodiment of
the package of envelopes of the present invention;
[0022] FIG. 6 is a top schematic view of a packaging method of the
present invention;
[0023] FIGS. 7-25 are a series of front perspective schematic views
illustrating a method for forming a package of banded envelopes of
the present invention;
[0024] FIGS. 26-33 are a series of front perspective schematic
views illustrating a method for loading packaged envelopes into an
envelope inserting machine;
[0025] FIGS. 34-48 are a series of front perspective schematic
views illustrating a partially automated method for loading
packaged envelopes into a plurality of envelope inserting machines;
and
[0026] FIGS. 49-64 are a series of front perspective schematic
views illustrating a fully automated method for loading packaged
envelopes into a plurality of envelope inserting machines.
DETAILED DESCRIPTION
[0027] FIGS. 1A and 1B illustrate a envelope 10 in its unassembled
and assembled conditions, respectively. FIGS. 1A and 1B illustrate
an diamond or diagonal cut envelope, but the invention can be
implemented and used with envelopes of nearly any shape or
configuration. The envelope 10 of FIGS. 1A and 1B includes a pair
of side flaps 12, a bottom flap 14, a top flap 16, and a central
portion 18. The side flaps 12, bottom flap 14 and top flap 16 are
each foldable on top of the central portion 18 and can be adhered
together to provide the envelope 10 shown in FIG. 1B. The top flap
16 is pivotable to an open position to provide access to the inner
cavity of the envelope 10, and includes an adhesive strip (not
shown) to seal the envelope 10 in the well-known manner. In the
illustrated embodiment, the envelope 10 includes a pair of front
windows 20 made of transparent, sheet-like material at the
addressee location and at the addressor location of the envelope
10. However, the envelope 10 may include only a single window (at
either the addressee or addressor location), or may not include any
windows. In addition, the envelope 10 can take a wide variety of
shapes and configurations beyond that specifically shown in FIGS.
1A and 1B.
[0028] FIGS. 2A and 2B illustrate a system for storing and shipping
envelopes. In that system, a packaging box 22 having a removable
lid 24 receives a loose stack of envelopes 10 therein (FIG. 2A).
The envelopes 10 can be inserted into the packaging box 22 either
manually or by an automated process. The lid 24 is then fitted on
the packaging box 22, and a number of packaging boxes 22 (i.e.,
five packaging boxes 22) are inserted into a shipping box 26 as
shown in FIG. 2B. Various other methods for storing and shipping
envelopes may be used, such as placing two stacks or row of
envelopes in a side-by-side configuration into a shipping case,
with a divider between the stacks/rows. However, these methods of
storing and shipping envelopes do not prevent the absorption of
moisture by the envelopes, and present various other difficulties
in shipping and handling.
[0029] FIGS. 3A, 3B and 3C illustrate a package or stack 30 of
banded envelopes 10. The stack of envelopes 30 includes a plurality
of envelopes 10 that are generally aligned (i.e. their outer edges
are generally aligned). The stack of envelopes 30 includes pair of
bands 32 extending around the outer periphery of the stack 30. The
bands 32 may be located on the outer longitudinal edges of each
envelope 10 and each band 32 may be spaced apart from the
associated adjacent lateral edge by the same distance. The bands 32
may extend only around the longitudinal edges of the inner
envelopes 10 (as well as the front and rear surfaces of the end
envelopes 10a, 10b, respectively) such that all of the inner
envelopes in the stack 30 include two free (unbound) lateral
edges.
[0030] FIG. 3B illustrates the envelopes 10 in a "flaps-up"
configuration wherein the top flap 16 is located adjacent to, or
forms, the upper edge of the envelope 10. However, if desired the
envelopes can be located in a "flaps-down" configuration wherein
the envelopes 10 are inverted from their configuration shown in
FIG. 3B.
[0031] The bands 32 can be made of a wide variety of materials,
including, but not limited to, paper, coated paper, plastic,
cardboard, ribbon material, wire, rubber bands or other elastic
material, non-elastic or generally non-elastic materials,
MYLAR.RTM. film sold by E.I. DuPont de Nemours and Company of
Wilmington, Del., or any combination of these materials. The bands
32 may be made of a relatively thin, flexible continuous material,
such as material having a thickness between about 0.05 mm and about
0.5 mm.
[0032] The bands 32 retain the stack of envelopes 30 in a
compressed condition. The stack of envelopes 30 may be compressed
such that the stack 30 exerts an expansion force of at least about
1/2 pound, or at least about two pounds, or at least about five
pounds, or at least about ten pounds. Thus, the bands 32 should be
able to withstand an expansion force applied by the stack of
envelopes 30 of at least about 1/2 pound, or at least about two
pounds, or at least about five pounds, or at least about ten
pounds. In addition, each stack of envelopes 30 should be
sufficiently compressed to generally seal air and moisture out away
from the innermost envelopes 10 in the stack 30. For example, the
stack of envelopes 30 may be compressed at least about 1 inch, or
about 10%, or at least about 20%, or at least about 30%, or at
least about 50% from its uncompressed state (i.e., a state wherein
each of the envelopes 30 touches any adjacent envelopes 10 but no
external compressive forces are applied).
[0033] Although greater compression may, in general, provide
greater sealing between adjacent envelopes 10 and thereby keep air
and moisture away from the envelopes 10, over-compression of the
envelopes 10 can lead to excessive bowing in the stack. In
particular, the center portions 15 of each envelope 10 have a
four-ply or five-ply thickness due to the overlapping nature of the
five panels 12, 14, 16, 18 at that location. The remaining portions
of the envelope 10 include only two-ply or three-ply thicknesses.
Accordingly, if the bands 32 are too tight and the envelopes 10 are
over-compressed, the outer edges of the envelopes 10 will be pulled
inwardly and the entire stack of envelopes 30 will bow about the
center portion 15 of the envelopes 10. This bowing can impart an
undesired curvature to the envelopes 10 and therefore should be
limited. Thus the stack of envelopes 30 should form a generally
rectangular prism. For example, the stack of envelopes 30 may be
configured such that each envelope 10 in the stack is bowed (i.e.,
pulled out of plane) by a distance of no greater than about 3/8'',
or no greater than about one quarter inch, or no greater than about
one-fortieth of the length of the envelope 10.
[0034] Besides the compression advantages provided by the bands 32,
the bands 32 also provide advantages with respect to packaging
and/or handling of the envelopes 10. For example, each band 32 may
provide a flat surface upon which suction cups or other suction
devices may be able to act to thereby grip, lift and manipulate the
stack of envelopes 30. Thus, each band 32 may have a width of at
least, for example, about 1/4'', or about one inch, or at least
about one-tenth of the length of the envelope 10, to provide
sufficient surface area upon which suction cups can act. Thus, the
bands 32 may be of a generally airtight (or generally non-air
permeable) material that allows suction cups to seal thereto. Of
course, various other methods of lifting and moving the envelopes
may be utilized.
[0035] The bands 32 may be printed with various markings located
thereon (see marking 31 of FIGS. 3A and 3B). For example, various
marks, indicia, targets, text, bar codes, computer or human
readable information, or the like which can be identified or
tracked by optical equipment associated with a robot or the like
(collectively termed "marking" or "markings" herein) may be printed
on the bands 32. This markings 31 can be utilized by a
vision-guided robot in an envelope inserting/stuffing machine. The
markings 31 can be a mark located a predetermined distance from the
ends of the stack 30 (i.e., a predetermined distance from the front
envelope 10a and/or rear envelope 10b, or from the sides of the
stack 30) so that the optical equipment can determine the location
of the outer edges of the package 30. The bands 32 may also include
markings 31 useful to a human operator, for example, an arrow
indicating the orientation and/or front end of the stack 30 for
insertion into envelope inserting or processing equipment.
[0036] Each package 30 may include any of a desired number of
envelopes. In one embodiment each package 30 has between about 50
and about 1,000 envelopes, and in one embodiment has about 250
envelopes. Each package of envelopes 30 may have a depth of between
about 1 inch to about 12 inches, and more particularly about 6
inches.
[0037] The banded nature of the envelopes 10 allows the envelopes
10 to be stacked and handled in an improved manner as compared to
nonbanded envelopes. For example, as shown in FIG. 4, a stack 42 of
packaged, banded envelopes 30 can be created on a flat surface, in
a box or the like. When the stack 42 shown in FIG. 4 is located in
a box or on the floor, each of the packages 30, including the
topmost package of envelopes 30a can support themselves as
freestanding units. If the envelopes 10 of the stack 30a were not
banded, the envelopes 10 of that package 30a would not be able to
be freestanding, and would fall forward and/or backward and be
difficult to contain.
[0038] Accordingly the banded nature of the packages 30 allows a
user to extract a limited number of envelopes 10 for processing by
simply gripping and lifting a package 30 off of the stack 42 of
packages 30 shown in FIG. 4 without causing the tumbling of loose
envelopes. Thus the packages 30 need not be bound on all sides by a
container, and quicker and easier access to the packages 30 is
provided. In addition, handling equipment (such as lifting slats or
arms) can be inserted between the bands 32 and stack of envelopes
30 to lift, move and manipulate the stack of envelopes 30.
[0039] Finally, because the packages of envelopes 30 are
compression-bound, a pile or stack 42 of packages 30 as shown in
FIG. 4 can be created and stacked relatively high. In particular,
the compression-bound nature of the envelopes lends stiffness to
the packages 30 (i.e., in the vertical direction) and allows
multiple packages 30 to be piled or stacked on top of each other in
a secure and stable manner. This allows greater stacking efficiency
and reduces freight costs and warehouse space.
[0040] As shown in FIG. 3D, an envelope dispenser 35 may be
provided for use with the envelope packages 30. The envelope
dispenser 35 may have a lower support panel 37, an upstanding back
panel 39 oriented generally perpendicular to the support panel 37,
and a pair of opposed, upstanding side panels 41. Each side panel
41 has an opening 43 through which a user can extend his or her
hands to grip and carry the envelope dispenser 35.
[0041] As shown in FIG. 3E the envelope dispenser 35 is configured
to store a predetermined number of envelope packages 30 (four
packages 30 in the illustrated embodiment). In this manner the
envelope dispenser 35 can be utilized to transport multiple
envelope packages 30. The envelope dispenser 35 may also be
configured to dispense envelopes directly to an envelope feeder
during the manufacturing process. In particular, four (or more or
less) envelope packages 30 could be located on the envelope
dispenser 35. The bands 32 on the packages 30 could then be cut and
removed. An operator could then invert the dispenser 35 on top of a
conveyer belt to thereby deposit the envelopes in an aligned and
orderly manner for easy processing. The use of the dispenser 35 in
this manner reduces repetitious movements by the operator and
increases efficiency.
[0042] As shown in FIG. 5, rather than providing a pair of straps
32 located adjacent to the outer edges of the envelope stack 30, a
single strap 32 may be provided and located, for example, about the
center 15 of the envelopes 10 of the envelope stack 30. The use of
a center strap 32 may prevent over-compression of the stack of
envelopes 30 due to the increased thickness at the center portion
15 of the envelopes 10, as discussed above. However, the center
strap 32 may, in certain cases, not provide sufficient compression
of the envelopes 30 due to the increased thickness at the center of
the envelopes 10 which limits compression. Thus, the use of straps
32 which are not located at the center of the envelopes may be
desired. The center strap 32 of FIG. 5 may be used in combination
with one or both of the outer straps 32 of the arrangement of FIGS.
3A and 3B. Indeed, any of a variety and number of combinations of
straps may be utilized without departing from the scope of the
present invention.
[0043] FIGS. 7-25 (as well as FIG. 6) illustrate a series of steps
which may be utilized to form the stack of banded envelopes 30
shown in, for example, FIGS. 3A and 3B. However, it should be
understood that the method illustrated in FIGS. 7-25 is
illustrative of only a single manner in which the banded envelopes
30 may be assembled, and various other assembly method or steps may
be utilized to assemble or create the banded envelopes 30 of the
present invention.
[0044] As shown in FIG. 7, the banded envelopes may be compiled and
banded using a mechanized assembly, apparatus or envelope stacking
machine 48. In the illustrated embodiment, the envelope stacking
machine 48 includes a set of three co-axial spiral wheels or discs
or delivery spiders 50 located at the end of a support table or
support surface 52. The table 52 has a pair of slots 54 formed
therein and extending the length of the table 52. More or less
slots 54 may be provided as desired to match the configuration of
the particular machine 48. Each spiral wheel 50 includes a set of
spiral slots 51 extending in a general circumferential direction.
Each of the spiral slots 51 is shaped to receive an envelope
therein by an envelope feeding device (not shown) as the spiral
wheels 50 rotate about their central axes.
[0045] In order to commence the stacking operation, the spiral
wheels 50 are rotated in the direction of arrow A as envelopes 10
(one of which is shown in FIG. 8) are fed into the spiral slots 51
of the spiral wheels 50. As the spiral wheels 50 pass through the
slots 54 of the support table 52, the lower edge of each envelope
10 that is held in the spiral wheels 50 contacts the support table
52, thereby retracting the envelope 10 out of the spiral slots 51
upon continued rotation of the spiral wheels 50. In this manner, as
envelopes 10 are fed into the spiral wheels 50 at the upstream
location of the support table 52, the rotating spiral wheels 50
continuously deposit an upright stack of envelopes 10 on the
support table 52.
[0046] As the spiral wheels 50 continue to rotate and deposit
envelopes 10, a partial stack of envelopes 30' is created on the
table 52 (FIG. 8). Thus, FIG. 8 illustrates the spiral wheels 50 as
an envelope delivery mechanism. However, instead of the spiral
wheels 50, various other methods of depositing the envelopes 10
onto the support table 52 may be utilized. For example, a vacuum
wheel or other similar devices may be utilized as the envelope
delivery mechanism to deposit the envelopes 10 on the support table
52.
[0047] The envelope stacking machine 48 includes a
horizontally-extending backing bar 56 which is coupled to a backing
bar support 58. The backing bar 56 engages the first envelope 10'
deposited on the table 52 by the spiral wheels 50 to provide
support to the first envelope 10' (and subsequent envelopes 10
deposited on the table 52). The backing bar 56 is movable in the
downstream direction B (i.e., along the length of the support table
52) to accommodate the growing length of the partial stack of
envelopes 30'. As will be discussed in greater detail below, the
backing bar 56 can be retracted (i.e., moved along its central
axis) into the backing bar support 58, and FIG. 8 illustrates the
backing bar 56 in its extended position.
[0048] As the spiral wheels 50 continue to deposit envelopes 10 on
the support table 52, the partial stack 30' continues to grow and
the backing bar 56 moves downstream to accommodate the growing
stack 30'. As can be seen in FIG. 9, eventually a full stack of
envelopes 30a is created after a predetermined number of envelopes
10 are located on the support table 52.
[0049] As can be seen in FIG. 9, the machine 48 includes an upper
set 58 (58a, 58b, 58c) of generally vertically oriented fingers and
a lower set 60 (60a, 60b, 60c, 60d) of generally vertically
oriented fingers. The upper set of fingers 58 includes an upstream
pair of upper fingers 58a, a downstream pair of upper fingers 58c,
and an intermediate set of upper fingers 58b. All of the upper
fingers 58 are coupled to an upper finger plate 62, and are
configured and located to fit between the slots 54 of the support
table 52.
[0050] Similarly, the lower set of fingers 60 includes an upstream
pair of lower fingers 60a, a downstream pair of lower fingers 60d,
and two intermediate pairs of lower fingers 60b, 60c. All of the
lower fingers 60 are coupled to a lower finger plate 64 and are
configured to fit between the slots 54 of the support table 52.
Both the upper fingers 58 and lower fingers 60 are movable in a
vertical direction. In addition, as will be discussed in greater
detail below, the lower fingers 60 are movable in the upstream and
downstream directions.
[0051] In the depiction of FIG. 9, the upper fingers 58 are located
in their lower or extended position, and the lower fingers 60 are
shown in their lower or retracted position. In this configuration,
the upstream pair of upper fingers 58a engages the first envelope
10' of the stack of envelopes 30a. Once the stack of envelopes 30a
engages the upstream pair of upper fingers 58a, the backing bar 56
can be retracted into the backing bar support 58, as shown in FIG.
9. The upstream pair of upper fingers 58a provides support to the
stack 30a, thereby allowing retraction of the backing bar 56
without causing collapse of the stack 30a. Next, as can be seen in
FIG. 10, the backing bar 56 and backing bar support 58 move
upstream to their home position adjacent to the spiral wheels
50.
[0052] As shown in FIG. 11, the backing bar 56 is then moved to its
extended position. In this manner, the backing bar 56 creates or
defines a break between the stack of envelopes 30a and a new stack
of envelopes 30b which will be created as the spiral wheels 50
continue to rotate and feed new envelopes 10 onto the table 52.
Thus the upper fingers 58, lower fingers 60 and backing bar 56
together form a separating mechanism, although various other
structures and devices may be utilized as the separating
mechanism.
[0053] Immediately after the backing bar 56 is moved to its
extended position, the lower set of fingers 60 is raised from its
lower (or retracted) position to its upper (or extended) position
such that the lower set of fingers 60 protrude upwardly through the
slots 54 of the support table 52. At the same time, the upper set
of fingers 58 is raised to its upper (or retracted) position until
the upper set of fingers 58 are pulled out of contact with the
stack of envelopes 30a. FIG. 11 illustrates the upper 58 and lower
60 set of fingers as they are in the process of being moved to
their upper positions. As can be seen in FIG. 11, the upper 58 and
lower 60 set of fingers are configured such that the intermediate
pair of lower fingers 60b engage the front envelope 10' of the
stack of envelopes 30a at the same time that the upstream upper
pair of fingers 58a engage the front envelope 10'. This arrangement
ensures that the envelope stack 30a is held in place as the upper
58 and lower 60 sets of fingers are raised.
[0054] FIG. 12 illustrates the upper set of fingers 58 in their
fully retracted position, and the lower set of fingers 60 in their
fully extended position. In this state, the upstream pair of lower
fingers 60a (not visible in FIG. 12) are located adjacent to the
backing bar 56 (i.e., located between the stacks 30a, 30b). The
intermediate pair of lower fingers 60b engages the leading envelope
10' of the stack of envelopes 30a to retain the stack of envelopes
in place between the fingers 60a, 60b.
[0055] As the spiral wheels 50 continue to rotate and feed
envelopes 10 onto the support table 52, the backing bar 56 and
lower set of fingers 60 move downstream together to accommodate the
newly-created stack of envelopes 30b. FIG. 13 illustrates a new
stack of envelopes 30b created in this manner, with the backing bar
56 and lower set of fingers 60 moved downstream to accommodate this
newly-created stack 30b. In addition, because the first created
stack of envelopes 30a is trapped between the upstream lower pair
of fingers 60a and the intermediate pair of lower fingers 60b, the
first stack of envelopes 30a is simultaneously moved downstream
along the support table 52.
[0056] Next, as shown in FIG. 14, the backing bar 56 is retracted
inside the backing bar support 58 and moved to its home position.
FIG. 14 illustrates the backing bar 56 and backing support 58 en
route to the home position.
[0057] As shown in FIG. 15, once the backing bar 56 is returned to
its home position, it is moved to its extended state such that the
backing bar 56 defines the break between the stack of envelopes 30b
and the next stack of envelopes 30c to be created. In addition, as
can be seen in FIG. 15, the upper set of fingers 58 is lowered or
moved to its extended position and the lower sets of fingers 60 is
lowered or moved to its retracted positions. The stack of envelopes
30a is thereby held in place between the upstream pair of upper
fingers 58a and the intermediate pair of upper fingers 58b, and the
stack of envelopes 30b is held in place between the backing bar 56
and the upstream pair of upper fingers 58a. Next, the lower set of
fingers 60 is moved upstream by a distance equal to the width of
the stack of envelopes 30a, 30b (FIG. 16). Thus, the upper set of
fingers 58 essentially act as a place holder while the lower set of
fingers 60 are re-set.
[0058] As shown in FIG. 17, the lower set of fingers 60 are then
raised or moved to their extended positions while the upper set of
fingers 58 are raised or moved to their retracted positions. The
upstream pair of lower fingers 60a (not shown in FIG. 17) is
located upstream of the stack of envelopes 30b and adjacent to the
backing bar 56, and the stacks of envelopes 30a, 30b are retained
in place between the various sets of lower fingers 60a, 60b,
60c.
[0059] Next, as shown in FIG. 18, as the spiral wheels 50 continue
to rotate the backing bar 56 and lower set of fingers 60 move
downstream to accommodate the creation of the stack of envelopes
30c. This pattern of retraction and movement of the backing bar 56,
lowering the upper 58 and lower 60 sets of fingers, moving the
lower set of fingers 60 upstream, raising the upper 58 and lower 60
set of fingers, and moving the backing bar 56 and lower fingers 60
downstream to accommodate the newest stack of envelopes 30d is
repeated until another stack of envelopes 30d is created as shown
in FIG. 19.
[0060] The embodiment of FIG. 19 illustrates four stacks of
envelopes 30a, 30b, 30c, 30d located on the support table 52.
However, of course, any number of stacks of envelopes 30 may be
created on the support table 52 in the desired manner, with simple
adjustments in the fingers 58, 60 and table 52 being made to
accommodate the varying number of stacks 30.
[0061] The machine 48 may include a robot arm 70 having a pair of
left gripping paddles 72 and a pair of right gripping paddles 74 to
form an envelope stack moving mechanism or gripping device. The
robot arm 70 is lowered until the left 72 and right 74 pairs of
paddles are located at either side of the downstream-most envelope
stack 30a (FIG. 20). The left 72 and right 74 paddles are then
moved towards each other to compress the stack of envelopes 30a
therebetween. For example, as shown in FIG. 6, the paddles 72, 74
may compress the stack 30a from a width W.sub.1 to a width W.sub.2.
The squeezing motion of the left 72 and right 74 paddles may apply
the desired compression to the stack of envelopes 30a, and
simultaneously allows the robot arm 70 to grip the stack of
envelopes 30a for movement and subsequent handling. The paddles 72,
74 and robot arm 70 may be movable or controllable by various air
cylinders, motor and slide combinations, linear motors and the like
as is well known in the art.
[0062] Next, as shown in FIG. 21, the stack of envelopes 30a is
lifted by the robot arm 70 and moved in a direction perpendicular
to the movement of the envelopes along the support table 52.
Alternately, the stack of envelopes 30a could be slid along a table
surface, and could also be moved in a direction parallel to the
movement of envelopes along the support table 52 (not shown in FIG.
21). The compressed envelope stack 30a is then positioned on or in
a banding device or bander 76 for application of the bands. For
example, as shown in FIG. 22, the banding device 76 may include a
pair of banding portions 78 having a spool of banding material
located in an associated banding spool storage compartment 81. The
spool of band material 82 is fed around the outer perimeter of a
banding opening 84 of each banding portion 78.
[0063] As shown in FIG. 23, the banding portions 78 are then moved
towards each other until the outer edges of the stack of envelopes
30a are located in the banding opening 84 of each banding portion
78. The bands of banding material 82 are then tightened down or
wrapped around the outer edges of the stack of envelopes 30a. The
bands 82 are then cut and adhered to themselves to form the bands
32 around the stack of envelopes 30a to retain the envelopes 10 in
the desired state of compression.
[0064] Thus, the banding device 76 wraps the bands 32 around the
envelope stack 30a, cuts the bands 32 to the proper length, grips
each end of the band 32 and adheres, bonds or otherwise couples the
ends of the bands together. The banding device 76 thereby
mechanically or automatically forms the band 32 around the
compressed stack, as opposed to manual application of the band 32.
The banding device 76 may be a Zeta 144-01 bander sold by Palamides
GMBH of Renningen, Germany, or a B40 bander sold by Band-All Vekamo
V. D. of Holland, or a US-2000 bander sold by Automatic Taping
Systems AG of Zug, Switzerland, or any of a variety of other
banding machines. The band ends 32 can be coupled together in
various manners, such as heat, ultrasonic welding, gluing or
adhesive, or the like. If the banding material 82 has markings 31
located thereon, the markings may be printed during or immediately
prior to the banding process. Alternately, the banding material 82
may be preprinted with the desired markings.
[0065] As indicated above, the left 72 and right 74 paddles may be
utilized to compress and grip the envelope stack 30a. However, if
desired, other methods may be utilized to compress the envelope
stack 30a, for example simply compressing the envelope stack 30a
between a set of plates, or routing the envelope stack 30a between
a pair of converging walls. In addition, the banding device 76 may
be able to compress the stack of envelopes 30a while applying the
bands 32.
[0066] The banding device 76 may not necessarily apply both bands
32 simultaneously. For example, a banding device 76 having only a
single banding portion 78 may be utilized, in which case the stack
of envelopes 30a or the banding device 76 can be rotated to apply a
band 32 to both ends of the envelope stack 30a. Of course, if only
a single band 32 is applied to the stack of envelopes 30a (i.e. as
shown in the embodiment of FIG. 5) then a banding device 76 with
only a single banding portion 78 need be utilized.
[0067] After the bands 32 are securely applied to the envelope
stack 30a, the banding portions 78 of the banding device 76 move
away from each other, as shown in FIG. 24, and the robot arm 70
lifts the banded stack of envelopes 30a out of and away from the
banding device 76. The robot arm 70 can then place the banded stack
of envelopes 30a in a shipping container, storage container,
conveyor belt, or other machine or device for further processing.
In the embodiment shown in FIG. 25, the stack of banded envelopes
30a is located in a box 80 for subsequent shipping. The box 80 can
be quite large, and may have a footprint that is about 3'.times.3'
or about 4'.times.4' to provide for a large storage volume. This
footprint is about sixteen times larger than the boxes 22 of FIG.
2A, and about eight times larger than the footprint of the boxes 26
of FIG. 2B.
[0068] Although not necessarily shown in FIGS. 20-25, as the stack
of envelopes 30a is banded and placed for packaging by the robot
arm 70, the support table 52 may continue to fill with new stacks
of envelopes 30 and the stacks of envelopes 30 on the table 52 can
be moved downstream for subsequent gripping and banding. The robot
arm 70 then lifts the newly-created stacks 30 away from the support
table 52 for banding. By lifting and moving the stacks of envelopes
30 away from the support table 52, a time buffer between the
continuous flow of envelopes 10/envelope packages 30 on the support
table 52 and the banding process (which is an intermittent motion)
is created. For example, FIG. 6 schematically illustrates the
package formation, compression and banding step. However, if
desired, the banding process may be an in-line process in which
bands are applied to the sets of envelopes 30 as they are fed onto
the support table 52.
[0069] In addition, FIGS. 7-25 illustrate a system wherein a single
robot arm 70 carries the stacks of envelopes 30 to the banding
device 76, and then places the banded stacks 30 into a box 80.
However, if desired two robot arms may be utilized. In particular,
a first robot arm may lift the newly-created stacks 30 off of the
support table 52, and transport them to the banding device 76 where
they are banded. The first robot arm may then place the banded
envelope stacks in a temporary storage location. A second robot arm
or other loading device may then transport the banded envelope
stacks from the temporary storage location into a box 80 or other
storage location. This method of loading and banding (i.e. in two
discreet steps) provides an addition time buffer and may allow for
quicker processing.
[0070] Besides placing the banded envelope stacks 30 in the boxes
80, the banded envelope stacks 30 may be placed into chipboard
containers, corrugated cardboard containers, plastic shipping
containers or stacking trays. When the banded envelopes 30 are
placed into large, collapsible/recyclable stacking trays, the
stacking trays can then be shipped to the customers for use. Once
the envelopes 10 are consumed, the stacking trays can be folded and
returned to the envelope manufacturer for reuse. In this case, the
only waste (i.e., packaging) product from the customer's viewpoint
is the bands 32 around each envelope stack 30. This provides a
significant decrease in waste compared to various boxes or other
wrapping materials in which prior art envelopes may be packaged. If
desired, the boxes 80 or other storage containers may be located on
a wheeled dolly 83 (see FIG. 25). The wheeled dolly 83 allows the
box 80 to be easily moved about the floor of the manufacturing or
assembly plant.
[0071] FIGS. 26-33 illustrate a series of steps showing one manner
in which the banded envelope stacks 30 may be processed by a
customer of the envelope stacks 30, such as a commercial envelope
processor, and how the banded stacks 30 can be utilized with
envelope inserting machinery. As shown in FIG. 26, a forklift or
other vehicle 100 carries a container or tray 102 with a stack of
banded envelopes 30 located therein. This tray 102 could have been
loaded with envelope packages 30 in the manner shown in FIGS. 24
and 25, and then shipped to the end user who will process/stuff the
envelopes. The forklift 100 positions the container 102 under a
robot arm 104. The robot arm 104 is movable into various
configurations, and is slidable or translatable along an overhead
beam 106.
[0072] As shown in FIG. 27, once the forklift 100 has loaded the
container 102 in the appropriate location, the forklift 100 is
backed away from the container 102 and the robot arm 104. The robot
arm 104 is then activated and moved until it is located above an
envelope stack 30' to be lifted. Next, as shown in FIG. 28, the
robot arm 104 grips and lifts the envelope stack 30'. The robot arm
104 may have various gripping/lifting means for gripping and
lifting the envelope stack 30'. However, in one embodiment, the
robot arm 104 includes a plurality of vacuum suction cups located
thereon (not shown) which engage the band 32 or bands 32 of the
stack of envelopes 30' to allow the robot arm 104 to grip and lift
the stack of envelopes 30'.
[0073] Next, as shown in FIG. 29 the stack of envelopes 30' is
positioned above a conveyor table 108. The arm 104 then positions
the stack of envelopes 30' on the conveyor table 108 and releases
the stack of envelopes 30' at the end of the conveyor table 108, as
shown in FIG. 30. The conveyor table 108 feeds the stack of
envelopes 30 located thereon in a downstream direction for
processing by the envelope inserting machine 112. Alternately, the
robot arm 104 can place envelope stacks 30 onto a tray (not shown)
which can hold multiple stacks 30 (i.e. three-five stacks). This
tray can then be transported, via conveyer or chain-belt systems,
to an inserting machine. The robot arm 104 may then return to the
container 102 to continue loading envelopes stacks 30 onto the
conveyor table 108/tray as desired.
[0074] In many envelope inserting machines, an outer or carrier
envelope receives an inner or return envelope therein. In one
embodiment of the present invention, the outer and inner envelopes
are both packaged in (separate) banded packages. Accordingly, in
FIG. 30 the outer banded envelopes are shown as envelope stacks 30
and the inner banded envelopes are shown as envelope stacks 110
stored within a container or tray 111.
[0075] Accordingly, the robot arm 104 may be utilized to lift a
banded stack of inner envelopes 110 (FIG. 31) out of the container
111 and to place the lifted stack of envelopes 110 on the inner
envelope conveyor table 114 (FIG. 32). Next, as shown in FIG. 33,
an operator 120 can lift a stack of envelopes 110 off the end of
the inner envelope conveyor table 114, remove the bands 32 and
place the stack of envelopes 110 in or on the envelope inserting
machine 112 for further processing. The inner envelope conveyor
table 114 can then be activated to move or index the stacks of
inner envelopes 110 downstream to replace the removed stack of
envelopes 110.
[0076] The operator 120 may also move to the downstream end of the
envelope conveyor table 108 and remove envelope stacks 30
therefrom, remove the bands 32 and insert the envelope stacks 30 in
or on the envelope inserting machinery 112. The envelope conveyor
table 108 can then be activated to move the stack of envelopes 30
downstream or alternately the conveyor tables 108, 114 may move
constantly to replenish the removed envelope stacks. In this
manner, the robot arm 104 can automatically lift stacks of
envelopes 30, 110 out of the associated containers 102, 111 to
constantly replenish the stack of envelopes on the conveyor tables
108, 114.
[0077] The system of FIGS. 26-33 may be considered to be
semi-automated in that an operator removes the bands 32 and
actually places the envelopes on or into the envelope inserting
machine 112. Alternately, the system of FIGS. 26-33 may be fully
automated and may not require the use of an operator 120. In this
case the conveyer tables 108, 114 may feed their envelope stacks
directly into the envelope inserting machinery. However in this
scenario the bands 32 will need to be removed. Thus the bands 32
could be removed by the robot arm 104, or by some other mechanism
while the envelope stacks 30 are located on the conveyer tables
108, 114, or by the envelope inserting machine 112. Further
alternately, the envelope inserting machine 112 may include or be
coupled to an envelope input feeding unit. The envelope input
feeding unit separates and integrates individual envelopes that
were previously banded together into the envelope inserting machine
112.
[0078] If desired, the output of the envelope inserting machine 112
(i.e. the processed or inserted envelopes) may also be able to be
automatically processed by the robot arm 104, or by another robot
arm. For example, the robot arm 104 may be able to lift the stacks
of processed or outputted envelopes and insert the processed
envelopes into a shipping or storage container.
[0079] FIGS. 34-48 illustrate an automated loading process
utilizing a robot arm 104 that is movable along an overhead beam
106, similar to the system of FIGS. 26-33. In contrast to the
system of FIGS. 26-33 (which includes only a single envelope
inserting machine 112), the system of FIGS. 34-48 includes four
envelope inserting machines 112 (see FIG. 48, although for
illustrative purposes FIG. 48 does not illustrate the bands on the
envelope stacks). Each envelope inserting machine 112 has two
conveyor tables that feed envelopes to be processed into the
envelope inserting machines 112. For example, one of the conveyor
tables 158 may feed outer envelopes to an envelope inserting
machine, and the other conveyor table 126 may feed inner envelopes
to be inserted into the outer envelopes (of course various other
inserts, besides the inner envelopes, can be stuffed or inserted
into the outer envelopes). As shown in FIG. 34, a forklift 100
carries a container 102 full of stacks of envelopes 30 and
positions the container 102 (FIG. 35) adjacent to the support beam
106/robot arm 104.
[0080] As shown in FIG. 36, the robot arm 104 then positions itself
over the stacks of envelopes 30. As shown in FIG. 37, the robot arm
104 then lifts four packages of envelopes 30. The robot arm 104
includes various suction cup devices (not shown) to lift any
desired number of envelope packages 30. Accordingly, in the
embodiment illustrated in FIG. 37, the robot arm 104 includes a
relatively high number of suction cups to grip and lift the four
envelope packages 30.
[0081] As shown in FIG. 38, the robot arm 104 deposits one of the
envelope packages 30 on a first envelope conveyor table 126. As
shown in FIG. 39, the robot arm 104 then moves along the length of
the overhead beam 106 towards the second conveyor table 128. The
robot arm 104 then deposits a stack of envelopes 30 on the second
conveyor table 128 (FIG. 40). The robot arm 104 then moves further
along the overhead beam 106 until the robot arm 104 is positioned
above a third conveyor table 130 (FIG. 41). As shown in FIG. 42,
the robot arm 104 then deposits a stack of envelopes 30 onto the
third conveyor table 130. As shown in FIG. 43, the robot arm 104
then moves further along the overhead beam 106 towards a fourth
conveyor table 132, and deposits the last held stack of envelopes
30 onto the fourth conveyor table 132 (FIG. 44).
[0082] If desired the robot arm 104 may then move along the
overhead beam 106 to container 150 which includes additional stacks
of envelopes 30 located therein. The stacks of envelopes 30 in the
container 150 may be, for example, inner envelopes and stacks of
envelopes in the container 102 may be, for example, outer
envelopes. As shown in FIG. 46, the robot arm 104 can then lift the
desired number of envelope stacks 30 out of the container 150 so
that the lifted envelopes 130 may be placed in the various conveyor
tables 152, 154, 156, 158 which receive and process the inner
envelopes. As shown in FIG. 47, an operator 120 may then lift
various stacks of envelopes 30 off of the conveyor table (i.e.,
conveyor table 154 in the illustrated embodiment) and load the
stack of envelopes 30 into or on the envelope inserting machinery
112. Of course, the operator 120 can also load stacks of envelopes
from any of the conveyor tables 126, 128, 130, 132, 152, 154, 156,
158 on or into the associated envelope inserting machine 112. In
this manner, as shown in FIG. 48, a single robot arm 104, fed by
two containers 102, 150 can constantly replenish the various
conveyor tables 126, 128, 130, 132, 152, 154, 156, 158 and the
containers 102, 150 are replenished as needed by forklift. The
banded nature of the envelopes 30 allows the improved processing
and handling by the robot arm 104.
[0083] The system of FIGS. 34-48, as illustrated, is a
semi-automated process. However, as described above in the context
of the system of FIGS. 26-33, the system of FIGS. 34-48 may be
fully automated such that the conveyer tables may feed their
envelope stacks directly into the envelope inserting machinery, the
bands can be automatically removed, and the output of the envelope
inserting machines can be automatically processed.
[0084] FIGS. 49-64 illustrate a fully automated envelope processing
or envelope inserting operation in which no human intervention is
required during normal operation. For example, as shown in FIG. 49
the automated loading process utilizes a robot arm 300 that is
movable along an overhead beam 302, similar to the system of FIGS.
26-33 and the system of FIGS. 34-48. The system of FIGS. 34-48
includes four envelope inserting machines 304, with each envelope
inserting machine 304 having two conveyor tables 306, 306' that
feed envelopes to be processed into the envelope inserting machines
304 and/or receive an output (i.e., processed envelopes) from the
envelope inserting machines 304. In particular, each envelope
inserting machine 304 includes an input conveyor table 306 upon
which unprocessed (i.e., unstuffed) envelopes are stored, and an
output conveyor table 306' upon which processed (i.e., stuffed)
envelopes outputted by the envelope inserting machine 304 are
stored. However, if desired each envelope inserting machine 304 may
have two input tables in the manner described and shown in FIGS.
26-48.
[0085] As shown in FIG. 49, a forklift 308 carries a container 310
full of banded stacks of envelopes 312 and positions the container
310 on a conveyer belt 314 located adjacent to or under the support
beam 302/robot arm 300. As shown in FIG. 50, the forklift 308 may
then lift and remove an empty container 316 located at the opposite
end of the conveyor belt 314. Next, as shown in FIG. 51, the robot
arm 300 positions itself over the packages of envelopes 320, 322 to
be lifted, and lifts the envelope packages 320, 322 out of the
associated container 324. In the embodiment shown in FIG. 51, the
robot arm 300 lifts two packages of envelopes 320, 322, and may
include various suction cup devices to lift any number of desired
envelope packages. For example, the robot arm 300 may be able to
lift and manipulate four or more (or less) envelope packages.
[0086] As shown in FIG. 52, the bands 328 are then cut away from
the envelope package 320, and drop down into a waste receptacle
330. The bands 328 can be cut or removed by any of a variety of
methods or means. For example, the robot arm 300 may include
cutting or tearing means which can cut, rip, tear, sever, shear or
otherwise separate the bands 328 from the associated envelope
package 320. Alternately, the robot arm 300 may carry the gripped
envelope package 320 to a separation mechanism (i.e., a blade,
tearing mechanism, or the like) which can cut or otherwise remove
the bands 328. Further alternately, the bands 328 may be removed
after the envelope packages 320 are deposited onto a conveyor table
306, for example, by the envelope inserting machine 304.
[0087] Next, as shown in FIG. 53, the envelope package 320 is
deposited on a conveyor table 306 for an envelope inserting machine
304. Retaining means (not shown) may be utilized to keep the now
loose stack of envelopes in place. As shown in FIG. 54, the robot
arm 300 may then move along its overhead beam 302 to another
envelope inserting machine 304 to deposit the remaining envelope
package 322 on the envelope conveyor table 306 of that envelope
inserting machine 304. As shown in FIG. 55, if not already removed,
the bands 328 of the remaining envelope package 322 are removed
and, as shown in FIG. 56, the remaining envelope package 322 is
deposited on the conveyor table 306 of the associated envelope
inserting machine 304. If the robot arm 300 initially picks up more
than two envelope packages, the robot arm 300 can then move along
its overhead beam 302 to position the remaining envelope packages
onto the input tables 306 of the other envelope inserting machines
304.
[0088] If desired, the robot arm 300 may then enter a rest state
until further action is required. Further action may involve
returning to the container 324 to lift additional packages of
banded envelopes and placing them on the input conveyor tables 306
of the envelope inserting machines 304.
[0089] The robot arm 300 may also be utilized to process envelopes
on the output conveyor table 306' of the envelope inserting
machines 304. For example, as shown in FIG. 57, the robot arm 300
may position itself above an output conveyor table 306' of one of
the envelope inserting machines 304. As shown in FIG. 58, the robot
arm 300 then lifts two stacks of envelopes 332 off of the output
table 306' of the envelope inserting machine 304. Because the
envelopes on the output table 306' are not banded, the robot arm
306 may be required to utilize means or mechanisms other than
suction cups to lift the envelope stacks 332 off of the output
conveyor tables 306'. For example, the robot arm 300 may be able to
compress a number of envelopes together or scoop a number of
envelopes to thereby grip, lift and manipulate the envelope stack
332. Once the stacks of loose envelopes 332 are gripped and lifted
(FIG. 58), the robot arm 300 may then position the gripped envelope
stacks 332 over a shipping or storage box 334 (FIG. 59). The robot
arm 300 may then position the outgoing envelopes 332 into the
storage box 334 and release the envelope stacks 332 therein (FIG.
60).
[0090] The lifting and packaging of outgoing, stuffed envelopes may
then be carried out for other ones of the envelope inserting
machines 304, for example loading envelope stacks 332' into a box
334' as shown in FIG. 62. In this manner, the robot arm 300 can
ensure that the input conveyor tables 306 are constantly
replenished with stacks of envelopes, and that the output conveyor
tables 306' are periodically unloaded to accommodate processed
envelopes.
[0091] FIG. 63 illustrates the robot arm 300 in its home position
wherein the robot arm 300 is positioned over the container 324 to
grip and lift additional packages of envelopes for positioning on
the input conveyor tables 306. As shown in FIG. 64, the conveyor
belt 314 may be activated to move a newly deposited container 310
downstream so that the newly deposited container 310 can be moved
into position and replace the container currently being accessed
324 once the container 324 is emptied. Thus, the envelope loading
and unloading process may be fully automated such that an operator
needs only to replace the input container 324, 310 and carry away
the boxes loaded with inserted envelopes.
[0092] In this manner, it can be seen that the banded nature of the
envelope stacks/packages allows for various improvements in
storing, handling, and processing of the envelopes. Thus
compression bound nature of the envelopes limits warpage. In
addition, the bound stacks allows a plurality of envelopes to be
handled as a unit, rather than on an individual basis. Various
examples of these improvements are provided herein, although it
should be understood that the envelope packages can provide various
other advantages in storing, handling, processing or otherwise
which are not explicitly mentioned.
[0093] Having described the invention in detail and by reference to
the preferred embodiments, it will be apparent that modifications
and variations thereof are possible without departing from the
scope of the invention.
* * * * *