U.S. patent application number 11/035909 was filed with the patent office on 2006-07-20 for zipper for transverse direction front panel pouch.
This patent application is currently assigned to ILLINOIS TOOL WORKS INC.. Invention is credited to Robert E. Hogan, Eric P. Plourde.
Application Number | 20060159372 11/035909 |
Document ID | / |
Family ID | 36683965 |
Filed Date | 2006-07-20 |
United States Patent
Application |
20060159372 |
Kind Code |
A1 |
Plourde; Eric P. ; et
al. |
July 20, 2006 |
Zipper for transverse direction front panel pouch
Abstract
The disclosure relates to a zipper design, with or without a
leading flange, to improve front panel zipper fabrication and end
use applications. The profiles of the zipper include a plurality of
interlocking elements, which may include C-shaped, J-shaped or
repeating male interlocking elements. In the unflanged version, a
portion of the interlocking elements of one of the profiles is
sealed directly to the interior of a bag on a first side of the
front panel bag opening, while the base of the other profile is
sealed on a second side of the front panel bag opening, aligned so
that interlocking elements of one profile can interlock with
interlocking elements of the other profile.
Inventors: |
Plourde; Eric P.; (Homewood,
IL) ; Hogan; Robert E.; (Burr Ridge, IL) |
Correspondence
Address: |
PITNEY HARDIN LLP;ACCOUNT: ILLINOIS TOOL WORKS INC.
7 TIMES SQUARE
NEW YORK
NY
10036-7311
US
|
Assignee: |
ILLINOIS TOOL WORKS INC.
|
Family ID: |
36683965 |
Appl. No.: |
11/035909 |
Filed: |
January 14, 2005 |
Current U.S.
Class: |
383/66 ;
24/585.12; 383/203; 383/61.1; 383/63 |
Current CPC
Class: |
Y10T 24/45168 20150115;
B65D 33/2533 20130101; B65D 33/2575 20130101; B65D 33/2541
20130101; B65D 33/2583 20130101; B65D 33/2508 20130101 |
Class at
Publication: |
383/066 ;
383/203; 383/061.1; 383/063; 024/585.12 |
International
Class: |
B65D 33/16 20060101
B65D033/16; B65D 33/00 20060101 B65D033/00; A44B 19/00 20060101
A44B019/00 |
Claims
1. A zipper for reclosable bags, comprising: a first interlocking
profile, including a first base and first interlocking elements
extending therefrom; a second interlocking profile, including a
second base and second interlocking elements extending therefrom;
wherein said first and second bases are free of flanges; a portion
of said interlocking elements of said first interlocking element
are intended to be sealed to an interior of the reclosable bag on a
first side of an opening of the reclosable bag; and wherein said
base of said second interlocking element is intended to be sealed
to an interior of the reclosable bag on a second side of an opening
of the reclosable bag, said second side being opposite to said
first side.
2. The zipper of claim 1 wherein said first and second interlocking
elements are C-shaped and comprised of two locking arms, distal
ends of said locking arms including inwardly extending detent
hooks.
3. The zipper of claim 1 wherein said first and second interlocking
elements are male locking elements with a post and an enlarged head
at the distal end of said post.
4. The zipper of claim 1 wherein said first and second interlocking
elements are J-shaped and comprised of a post and a hook at a
distal end of said post.
5. The zipper of claim 1 wherein said first and second interlocking
profiles are made from very high melting index material to
facilitate bonding to the film of the reclosable bag.
6. The zipper of claim 1 wherein said first and second interlocking
profiles are made from low density polyethylene.
7. The zipper of claim 1 wherein said interlocking elements are
regularly spaced along said bases to allow for variations in
alignment of said first and second profiles in an interlocked
configuration.
8. A reclosable bag, comprising; front and rear walls formed from a
web; a line of weakness in said front wall which can be torn in
order to provide an opening; a zipper which can reclose said
opening; said zipper including a first interlocking profile,
including a first base and first interlocking elements extending
therefrom and a second interlocking profile, including a second
base and second interlocking elements extending therefrom; wherein
said first and second bases are free of flanges; wherein a portion
of said interlocking elements of said first interlocking element
are sealed to an interior of the reclosable bag on a first side of
said line of weakness; and wherein said base of said second
interlocking element is sealed to an interior of the reclosable bag
on a second side of said line of weakness, said second side being
opposite to said first side.
9. The reclosable bag of claim 8 wherein said first and second
interlocking elements are C-shaped and comprised of two locking
arms, distal ends of said locking arms including inwardly extending
detent hooks.
10. The reclosable bag of claim 8 wherein said first and second
interlocking elements are male locking elements with a post and an
enlarged head at the distal end of said post.
11. The reclosable bag of claim 8 wherein said first and second
interlocking elements are J-shaped and comprised of a post and a
hook at a distal end of said post.
12. The reclosable bag of claim 8 wherein said first and second
interlocking profiles are made from very high melting index
material to facilitate bonding to the film of the reclosable
bag.
13. The reclosable bag of claim 8 wherein said first and second
interlocking profiles are made from low density polyethylene.
14. The reclosable bag of claim 8 wherein said interlocking
elements are regularly spaced along said bases to allow for
variations in alignment of said first and second profiles in an
interlocked configuration.
15. The reclosable bag of claim 8 wherein said first interlocking
profile is sealed to said rear wall.
16. A zipper for reclosable bags, comprising: a first interlocking
profile, including a first base and first interlocking elements
extending therefrom; a second interlocking profile, including a
second base and second interlocking elements extending therefrom;
said first interlocking profile including a flange; wherein said
interlocking elements are regularly spaced along said bases to
allow for variations in alignment of said first and second profiles
in an interlocked configuration; wherein said flange is intended to
be sealed to an interior of the reclosable bag on a first side of
an opening of the reclosable bag; wherein said base of said second
interlocking element is intended to be sealed to an interior of the
reclosable bag on a second side of an opening of the reclosable
bag, said second side being opposite to said first side; and
wherein a width of said at least one flange is less than a width of
said interlocking profiles wherein said interlocking elements are
formed.
17. The zipper of claim 16 wherein said first and second
interlocking elements are C-shaped and comprised of two locking
arms, distal ends of said locking arms including inwardly extending
detent hooks.
18. The zipper of claim 16 wherein said first and second
interlocking elements are male locking elements with a post and an
enlarged head at the distal end of said post.
19. The zipper of claim 16 wherein said first and second
interlocking elements are J-shaped and comprised of a post and a
hook at a distal end of said post.
20. The zipper of claim 16 wherein said first and second
interlocking profiles are made from low density polyethylene.
21. The zipper of claim 16 wherein said second interlocking profile
includes at least one flange.
22. The zipper of claim 16 further including a peel seal between
said first and second interlocking profiles.
23. A reclosable bag, comprising; front and rear walls formed from
a web; a line of weakness in said front wall which can be torn in
order to provide an opening; a zipper which can reclose said
opening; said zipper including a first interlocking profile,
including a first base and first interlocking elements extending
therefrom and a second interlocking profile, including a second
base and second interlocking elements extending therefrom; said
first interlocking profile including a flange; wherein said
interlocking elements are regularly spaced along said bases to
allow for variations in alignment of said first and second profiles
in an interlocked configuration; wherein said flange is sealed to
an interior of the reclosable bag on a first side of an opening of
the reclosable bag; wherein said base of said second interlocking
element is sealed to an interior of the reclosable bag on a second
side of an opening of the reclosable bag, said second side being
opposite to said first side; and wherein a width of said at least
one flange is less than a width of said interlocking profiles
wherein said interlocking elements are formed.
24. The reclosable bag of claim 23 wherein said first and second
interlocking elements are C-shaped and comprised of two locking
arms, distal ends of said locking arms including inwardly extending
detent hooks.
25. The reclosable bag of claim 23 wherein said first and second
interlocking elements are male locking elements with a post and an
enlarged head at the distal end of said post.
26. The reclosable bag of claim 23 wherein said first and second
interlocking elements are J-shaped and comprised of a post and a
hook at a distal end of said post.
27. The reclosable bag of claim 23 wherein said first and second
interlocking profiles are made from low density polyethylene.
28. The reclosable bag of claim 23 wherein said second interlocking
profile includes at least one flange.
29. The reclosable bag of claim 23 further including a peel seal
between said first and second interlocking profiles.
30. The reclosable bag of claim 23 wherein said first profile is
sealed to said rear wall.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention pertains to a zipper design, with or without
a leading flange, to improve front panel zipper fabrication and end
use applications.
[0003] 2. Description of the Prior Art
[0004] In the prior art of reclosable bags, front panel pouches are
well-known. Examples include U.S. Pat. No. 5,951,453 entitled
"Reclosable Bag Assembly and Method of Making Same", issued on Sep.
14, 1999 to Yeager and U.S. Pat. No. 6,270,257 entitled "Reclosable
Bag with Profile Strip Fastener Assembly Having Improved Opening
Feature", issued on Aug. 7, 2001 to Yeager.
[0005] Likewise, in the prior art of zippers for reclosable bags,
it is known to design profiles which can interlock with similar
profiles in various different alignments. Examples of this are
disclosed in U.S. Patent Publication No. US-2003-0101552-A1,
entitled "Variable Alignment Zipper for Reclosable Bags", published
Jun. 5, 2003 listing inventors Eric P. Plourde and Kevin P.
Olechowski and U.S. Pat. No. 6,217,215 entitled "Closure Mechanism
Having a Perceptible Feedback System", issued on Apr. 17, 2001 to
Tomic.
[0006] While these references disclose devices which have been
satisfactory in certain respects, it is desired to obtain further
improvements in front panel zipper fabrication and end use
applications.
OBJECTS AND SUMMARY OF THE INVENTION
[0007] It is therefore an object of the present invention to
provide a zipper for a reclosable bag which provides improvements
in front panel zipper fabrication.
[0008] It is therefore a further object of the present invention to
provide a zipper for a reclosable bag which provide improvements in
end use applications.
[0009] These and other objects are attained by providing a zipper
which can have a flanged or unflanged (otherwise known as webless
or monotreme) embodiment. The interlocking profiles of the zipper
include a series of interlocking elements, such as C-shaped
elements terminating at both ends in an inwardly pointing hook
configuration, J-shaped elements or multiple male elements. This
allows the profiles to engage each other easily and form a strong
interlocking configuration.
[0010] For use in a front panel opening bag, typically a portion of
the interlocking elements of a first profile are sealed to the
interior of the web of the bag on a first side of the opening so
that the remaining interlocking elements face outwardly while the
base of a second profile is attached to the interior of the web of
the bag via a sealant layer on a second side of the opening so that
the interlocking elements face inwardly toward similar elements of
the first profile. In the flanged configuration, it is the flange
of the first profile which is bonded to the web of the bag. In the
unflanged configuration, as a portion of the interlocking elements
of the first profile is bonded to the film, material with a very
high melting index is required for the profiles.
[0011] In one configuration, a peel seal is added between the
profiles.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Further objects and advantages of the invention will become
apparent from the following description and from the accompanying
drawings, wherein:
[0013] FIG. 1 is a front view of the reclosable bag with an
unflanged embodiment of the zipper, of the present invention.
[0014] FIG. 2 is a cross-sectional view of plane 2-2 of FIG. 1.
[0015] FIGS. 2a and 2b are alternative cross-sectional views of
plane 2-2 of FIG. 1.
[0016] FIG. 3 is a cross-sectional view of the profiles,
immediately prior to interlocking, of the unflanged embodiment of
the zipper, including C-shaped interlocking elements.
[0017] FIG. 4 is a cross-sectional view of the profiles, after
interlocking, of the unflanged embodiment of the zipper, including
C-shaped interlocking elements..
[0018] FIG. 5 is a cross-sectional view of the profiles, after
interlocking, of the flanged embodiment of the zipper, including
C-shaped interlocking elements.
[0019] FIG. 6 is a cross-sectional view of the profiles, after
interlocking, of a further embodiment with a single flange on each
profile, including C-shaped interlocking elements.
[0020] FIG. 7 is a cross-sectional view of the profiles, after
interlocking, of a still further embodiment wherein one profile
includes one flange and the other profile includes two flanges,
including C-shaped interlocking elements.
[0021] FIG. 8 is a cross-sectional view of the profiles, after
interlocking, of yet a further embodiment with a single flange on
each profile and a peel seal between the profiles, including
C-shaped interlocking elements.
[0022] FIG. 9 shows the zipper placed on the web in the transverse
direction during manufacture.
[0023] FIGS. 3a-8a correspond to FIGS. 3-8, respectively, with
multiple male interlocking elements in place of C-shaped
interlocking elements.
[0024] FIGS. 3b-8b correspond to FIGS. 3-8, respectively, with
J-shaped interlocking elements in place of C-shaped interlocking
elements.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] Referring now to the drawings in detail wherein like
numerals refer to like elements throughout the several views, one
sees that FIG. 1 is a front view of a reclosable bag 10 and that
FIG. 2 is a cross-sectional view of the bag 10. Reclosable bag 10
is formed from front panel 12 and rear panel 14 of film or web
which are sealed together by a top seal 16, a bottom seal 18 and
side seals 20, 22. A front opening, such as a perforated line 30 is
formed on an upper portion of front panel 12 of film or web. The
user would, of course, tear the perforated line 30 to gain initial
access to the contents of reclosable bag 10. Perforated line 30
could be replaced by two closely spaced perforated parallel lines
(not shown) in a oval-like configuration so that the opening is
formed by the user removing a tear-strip of film formed between the
two closely spaced perforated parallel lines. Additionally, the
front opening may include a thumb tab (not shown) to facilitate
opening by the user. Zipper 32 is formed from upper and lower
interlocking profiles 34, 36 (see FIG. 2) and provides the
reclosability feature of the front opening formed by perforated
line 30. As shown in FIG. 2, a portion of upper interlocking
profile 34 is sealed to the interior of front panel 12 of film or
web which is immediately above the front opening formed by
perforated line 30. A portion of the locking arms (described
hereinafter) of interlocking profile 34 is sealed to the film. This
requires that the profiles be made of very high melting index
material to facilitate bonding of the upper profile 34 to the film.
Typically, upper and lower interlocking profiles 34, 36 are
extruded with standard low density polyethylene resins. The
remaining portion of upper interlocking profile 34 extends beyond
the edge of film abutting the opening formed by perforated line 30.
This configuration results in the locking arms of upper
interlocking profile 34 pointing outward toward the exterior of
reclosable bag 10.
[0026] The lower interlocking profile 36 includes a base (described
hereinafter) which is sealed to the interior of front panel 12 of
film or web via a sealant panel on lower interlocking profile 36.
Typically, the entire base is sealed to the interior of front panel
12 of film or web. This configuration results in the locking arms
of lower interlocking profile 36 pointing inwardly toward the
interior of reclosable bag 10. As shown in FIG. 4, this
configuration likewise results in the locking arms 44, 46 of upper
interlocking profile 34 being in position to engage the locking
arms 56, 58 of lower interlocking profile 36.
[0027] Alternatively, as shown in FIGS. 2a and 2b, the upper
interlocking profile 34 can be sealed into top seal 16, either with
a flange (FIG. 2a) or without a flange (FIG. 2b). Typically, upper
interlocking profile 34 is sealed to front panel 12 first, and then
rear panel 14 is subsequently sealed thereto.
[0028] As shown in FIGS. 3 and 4, upper interlocking profile 34
includes upper base 40 and upper C-shaped interlocking elements 42.
Each C-shaped interlocking element 42 includes two locking arms 44,
46 forming a C-shape. Further, locking arms 44, 46 include
respective distal inwardly extending detent hooks 48, 50 (numerals
shown in FIG. 3 only).
[0029] Lower interlocking profile 36 includes lower base 52 and
lower C-shaped interlocking elements 54. Each C-shaped interlocking
element 54 includes two locking arms 56, 58 forming a C-shape.
Further, locking arms 56, 58 include respective distal inwardly
extending detent hooks 60, 62 (numerals shown in FIG. 3 only).
[0030] As shown in FIG. 4, in the interlocked configuration of
interlocking elements 34, 36, one of inwardly extending detent
hooks 48, 50 engages with one of inwardly extending detent hooks
60, 62. Furthermore, the identity of configuration of the
successive C-shaped interlocking elements 42 or 54, along with the
regular or even spacing thereof, on upper or lower interlocking
profiles 34, 36 allows the interlocking profiles to engage with
different alignments. For instance, in FIG. 4, upper interlocking
profile 34 could be moved to the right by the distance separating
the centers of two adjacent C-shaped interlocking elements 42
resulting in the engagement of all eight C-shaped interlocking
elements 54 of lower interlocking profile 36 with the eight
rightmost C-shaped interlocking elements 42 of upper interlocking
profile 34.
[0031] FIG. 5 discloses an embodiment wherein upper interlocking
element 34 includes flange 64. With this embodiment, flange 64
would be sealed to the interior of front panel 12 of film or web
which is immediately above the front opening formed by perforated
line 30 thereby exposing all of upper C-shaped interlocking
elements 42 for engagement with lower C-shaped interlocking
elements 54.
[0032] FIG. 6 discloses an embodiment with flange 64 on upper
interlocking element and flange 70 formed by an extension of lower
base 52.
[0033] FIG. 7 discloses an embodiment with flanges 64 and 70 as
disclosed in FIG. 6 and further including flange 80 formed on an
end of lower base 52 opposite to that of flange 70.
[0034] Typically, the width of any of flanges 64, 70, 80 would be
less than the width of the body of the zipper, which is defined as
the total width of the zipper which includes the C-shaped
interlocking elements 42, 54.
[0035] FIG. 8 discloses an embodiment with a peal seal 90 between
upper and lower interlocking profiles 34, 36. Peal seal 90 is
typically configured to be immediately inwardly adjacent to the
perforated line 30 of FIG. 1.
[0036] FIGS. 3a-8a correspond to FIGS. 3-8, respectively, with
multiple male interlocking elements 142, formed from post 144 and
enlarged detent head 146 at a distal end of post 144 (numerals
shown on FIG. 3a only), in place of C-shaped interlocking elements
42.
[0037] FIGS. 3b-8b correspond to FIGS. 3-8, respectively, with
J-shaped interlocking elements 242, formed from post 244 and
locking hook 246 at a distal end of post 244 (numerals shown on
FIG. 3b only), in place of C-shaped interlocking elements 42.
[0038] In all of these embodiments, during manufacture, typically,
the zippers 32 are placed in the transverse direction on the web
100 as shown in FIG. 9.
[0039] Thus the several aforementioned objects and advantages are
most effectively attained. Although preferred embodiments of the
invention have been disclosed and described in detail herein, it
should be understood that this invention is in no sense limited
thereby and its scope is to be determined by that of the appended
claims.
* * * * *