PLASTIC BAG BODY HAVING A PLASTIC ZIPPER WITH A SLIDER EQUIPPED THEREWITH AND ADDED THERETO A PREVENTIVE FUNCTION AGAINST UNFAIRLY UNSEALING, AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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app pub date -
Dec 9, 2014
filing date -
Dec 24, 2009
priority date (Note) -
Abandoned
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Abstract
A plastic bag body having a preventive function against unfairly unsealing and having a plastic zipper with a slider equipped therewith is provided by which hermetic sealing can be kept, and which can be produced mechanically and successively at an excellent productivity. In a bag body comprising a bag made of two plastic films, both ends of which are welded, and having plastic zipper with a slider at an opened portion of the bag, a cover film rides astride and covers top portions of the plastic slider, under a condition wherein the plastic zipper is closed, and of the plastic zipper, except for a welded portion located opposite to the slider of the bag body, at least one lower end of the cover film extending for full width of the bag body, and the plastic film, the lower ends of the cover film and the flange portions are welded together.
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