초록 ▼

A bag has a reclosable zipper between wall panels and extending between side edges at the top end of the bag, the zipper comprising a continuous length of extruded profile plastic strip folded upon itself for zipper closing interengagement of its profile parts, the profile strip portions being spot

A bag has a reclosable zipper between wall panels and extending between side edges at the top end of the bag, the zipper comprising a continuous length of extruded profile plastic strip folded upon itself for zipper closing interengagement of its profile parts, the profile strip portions being spot welded together at the fold in the strip which may be at one of the side edges of the bag, such as a fold in the material which provides the walls of the bags. The strip may be notched out to facilitate folding. By differential mass, or differential spacing, or tilted biasing of profile parts of the zipper strip, and provision of a lateral flange of substantial width on the strip not only is interlocking of the profile parts facilitated, but an expedient is provided for restraining opening of the zipper by internal bag pressures, while permitting relatively easy opening of the bag from the outside, i.e. the top or mouth end of the bag. Visual determination of orientation of one of a plurality of profile parts of the folded zipper is provided for.

대표청구항 ▼

A bag having confronting bag body wall panels, opposite side edges, a bottom end and a top end, and including: a reclosable zipper sandwiched between said wall panels and extending between side edges adjacent to said top end; said zipper comprising a continuous length of extruded profiled plastic st

A bag having confronting bag body wall panels, opposite side edges, a bottom end and a top end, and including: a reclosable zipper sandwiched between said wall panels and extending between side edges adjacent to said top end; said zipper comprising a continuous length of extruded profiled plastic strip having a plurality of spaced parallel profile parts and being folded upon itself to provide two parallel strip portions extending from a fold; one of said strip portions being attached to one of said wall panels and the other strip portion being attached to the other of said wall panels; the profile parts on said one strip portion being releasably interlockable with the profile parts on said other strip portion for closing said top end of the bag; said fold being located at one of said side edges; and a spot seal securing said strip portions together at said fold.