US 4,682,366 AGranted

Attachment of plastic zipper to incompatible bag wall web

AssigneeMinigrip, Inc.

InventorsSteven Ausnit, Per Bentsen

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Abstract

Bags especially adapted to be made from fusibly incompatible bag body web material and extruded plastic zippers comprising in each instance a pair of zipper strips having reclosable zipper profiles located below upper ends of pull flanges, and fused connecting anchors extending from the zipper strips through holes in the material of the bag body and thereby permanently attaching the zipper strips to the bag body. The portions of the bag body material having the anchor holes may be received in groove sockets in the zipper strips, where the zipper strips are located at the inside of the bag. The zipper strips may be located on the outside of the bag and sealably pinch material of the bag body material in and between interlocking profiles, with ends of the zipper strips secured to the sides of the bag by fused anchors extending through holes in side seams on the bag body. Method of making the bags is disclosed.

Claims18

Dependent claims

In a bag comprising a thin web material body having side margins and with an openable top flanked by opposed upwardly projecting pull flanges, and an extruded plastic zipper means carried by said body along said pull flanges, and wherein:

said bag body and said zipper means are fusibly incompatible;
said zipper means comprising a pair of fusible extruded plastic strips extending from side-to-side of said bag to and between said margins and having complementary separably interlockable zipper profiles and located parallel to and substantially below upper ends of said pull flanges;
each of said strips having a base parallel to said pull flanges;
holes in portions of the material of said bag body and aligned with said strips;
and fused connecting anchors extending from said zipper strips through said holes and permanently attaching said zipper strips to said bag body in a manner to effect cooperation of said strips with said pull flanges so that the profiles of said strips can be separated from an interlocked relation by pulling said pull flanges in respective opposite directions;
said holes being elongated with their length parallel to said zipper strips and said anchors being of elongated cross section complementary to said holes so as to strengthen the anchoring relationship of said anchors and said portions of the bag material and to resist stresses of pulling forces applied to said portions of the bag material bag and through said anchors when pulling the pull flanges apart and thereby pullingly separating the zipper profiles from their interlocked relation.

3 more elements

A method of making a bag equipped with extruded plastic reclosable zipper means, comprising:

forming a bag body from thin web material and having opposite side margins and an openable top flanked by opposed upwardly projecting pull flanges;
providing a pair of opposed extruded plastic zipper strips fusibly incompatible with the material of said bag body and having complementary separably interlockable zipper profiles and each strip having a base;
assembling said profile strips along said pull flanges with said bases parallel to said pull flanges, and locating said strips with their profiles substantially below upper ends of said pull flanges;
permanentaly attaching said zipper strips to said bag body by fusibly connecting anchors from said zipper strips through holes in said bag material in a manner to effect cooperation of said strips with said pull flanges so that said profiles of said strips can be separated from an interlocked relation by pulling said pull flanges in respective opposite directions;
and elongating said holes lengthwise of said fastener strips and correspondingly elongating the cross section of said anchors so as to strengthen the anchoring relationship of said anchors and said bag material to resist stresses from pulling forces applied to said bag material by said anchors when pulling the pull flanges apart and separating the profiles from an interlocked relation.

2 more elements

Dependencies are inferred from the claim text.