Flexible bags – With closure – Rib and groove
Reexamination Certificate
1999-08-17
2001-02-13
Pascua, Jes F. (Department: 3727)
Flexible bags
With closure
Rib and groove
C383S064000, C383S120000, C383S210000, C024S03050R, C024S559000
Reexamination Certificate
active
06186663
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the field of reclosable packaging. More particularly, the present invention relates to a gusseted package having a reclosable zipper.
2. Description of the Prior Art
Gusseted packages having reclosable zippers are well-known in the reclosable packaging art. For example, U.S. Pat. No. 4,736,450 discloses such a package. In a typical prior art gusseted package having a reclosable zipper, the front and back walls of the package are joined together by expanding side gussets. Interlocking reclosable zipper profiles are sealed to the front and back walls at free upper end portions of the package walls which are not joined by the gussets. This however does not provide for package integrity.
Accordingly, it is the object of the present invention to provide a new and improved gusseted package having a reclosable zipper which overcomes problems associated with the prior art as indicated above.
Alternately a reclosable zipper may be sealed to the front wall, with the gusset and front and back walls being then sealed together at the top of the package. This does not provide a full opening of the gusset at the top of the bag.
SUMMARY OF THE INVENTION
In accordance with the present invention, a reclosable package is provided. The package includes opposing walls extending from a package bottom, which walls are joined at opposite sides of the package by two expanding side gussets.
The package further includes a reclosable zipper attached to the package walls. The reclosable zipper is comprised of a pair of complementary interlocking fastener profiles carried by a carrier web. The carrier web includes two opposing walls joined at their ends by a pair of opposing gussets that extend beyond the ends of the fastener profile. The fastener profiles are attached to opposing inner wall surfaces of the carrier web and the carrier web is thin enough in the gusset area so that when the fastener profiles are interlocked, the carrier web gussets are caught between the fastener profiles.
The present invention will now be described in detail, with frequent reference being made to the drawings identified below in which identical numerals represent identical elements.
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patent: 4706297 (1987-11-01), Ausnit
patent: 4736450 (1988-04-01), Van Erden et al.
patent: 4971454 (1990-11-01), Branson et al.
patent: 4997104 (1991-03-01), Pohl
patent: 5037138 (1991-08-01), McClintock et al.
patent: 5364189 (1994-11-01), Kuge et al.
patent: 5692837 (1997-12-01), Beer
patent: 5788378 (1998-08-01), Thomas
patent: 5938339 (1999-08-01), Ouchi
patent: 6030123 (2000-02-01), Mitarai
patent: 6082897 (2000-07-01), Galomb
patent: 5-270551 (1993-10-01), None
patent: 5-270552 (1993-10-01), None
Illinois Tool Works Inc.
Pascua Jes F.
Pitney Hardin Kipp & Szuch LLP
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