Method of sealing a zipper with concave bridges or bases...

Details Method of sealing a zipper with concave bridges or bases... Method of sealing a zipper with concave bridges or bases...

2006-06-12

2008-08-12

Gerrity, Stephen F. (Department: 3721)

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

C053S412000, C053S133400, C053S139200, C156S073100, C156S580200, C156S581000, C156S583100, C493S215000, C493S927000

Reexamination Certificate

active

07410453

ABSTRACT:
The present invention includes a method and apparatus wherein webless zipper is provided with concave seal bridges. These concave seal bridges are complementary in shape to convex sealing bars. This captures or positions the seal bridges of the zipper profiles resulting in improved alignment of the profiles and improved performance of the manufacturing apparatus.

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