Substantially leakproof zipper closure for bags and method
First Claim
1. A bag including a collapsed tubular body with a top providing an opening extending from side-to-side of the bag, and comprising:
- a hood-like top closure secured to said bag body over said opening and having end portions extending to a substantial distance beyond opposite sides of the bag body;
means closing said end portions against leakage;
said top closure having a zipper separably connecting a pair of attachment flanges one of which extends along and is secured to one face of the bag top along said opening and the other of which flanges is secured to a second face of the bag top along said opening; and
said means closing said end portions against leakage comprising adhesive bonding said flanges in said end portions.
1 Assignment
0 Petitions
Accused Products
Abstract
A hood-like top closure on a bag top has end portions extending beyond opposite sides of the bag and the end portions are closed against leakage. The top closure may have a zipper separably connecting a pair of attachment flanges one of which extends along and is secured to one face of the bag top along the top opening and the other of which flanges is secured to a second face of the bag top along the opening. More particularly, the end portions of the attachment flanges are adhesively bonded so as to prevent sifting or leakage therethrough. A method of and apparatus for making the bag are also provided.
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Citations
12 Claims
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1. A bag including a collapsed tubular body with a top providing an opening extending from side-to-side of the bag, and comprising:
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a hood-like top closure secured to said bag body over said opening and having end portions extending to a substantial distance beyond opposite sides of the bag body; means closing said end portions against leakage; said top closure having a zipper separably connecting a pair of attachment flanges one of which extends along and is secured to one face of the bag top along said opening and the other of which flanges is secured to a second face of the bag top along said opening; and said means closing said end portions against leakage comprising adhesive bonding said flanges in said end portions. - View Dependent Claims (2, 3, 4)
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5. A method of making a bag, comprising:
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providing a collapsed tubular bag body with a top having an opening extending from side-to-side of the bag; supplying a hood-like top closure over said opening; effecting projection of opposite end portions of said top closure beyond the opposite sides of the bag; providing said top closure with a zipper separably connecting a pair of attachment flanges; assembling and securing one of said attachment flanges to one face of the bag body top along said opening and assembling and securing the other of said flanges to a second face of the bag top along said opening; and adhesively bonding the portions of said flanges which are in said end portions whereby to effect closing of said end portions against leakage. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A bag including a collapsed tubular body with a top providing an opening extending from side-to-side of the bag, and comprising:
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a hood-like top closure secured to said bag body over said opening and having end portion comprising confronting flanges extending to a substantial distance beyond opposite sides of the bag body; a stitched rip cord extending along said top closure and through said flanges; said flanges having opposed interfaces; a stripe of adhesive securing said interfaces together below said rip cord; additional adhesive securing said interfaces together above said rip cord; and a narrow substantially adhesive-free alley along said interfaces and between said stripe and said additional adhesive and along which alley said rip cord extends, so that along said alley the stitches of the rip cord are free from objectionable adhesive contamination.
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Specification