Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Reexamination Certificate
2006-09-19
2006-09-19
Desai, Hemant M. (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
C493S210000, C493S191000, C156S257000, C156S263000, C156S308400, C383S113000, C206S522000, C206S484000
Reexamination Certificate
active
07108650
ABSTRACT:
The envelope comprises layers of plain un-coated kraft paper and of bubble-wrap polyethylene. A stack of the layers is joined at the marginal edges of the envelope by squeezing the stack between a pair of points-dies, which are formed with points that puncture the kraft paper but do not puncture the polyethylene. The points push crowns of un-punctured polyethylene through the punctured boles in the paper. Then, the marginal edges are squeezed flat between flat-dies, the flat-dies being heated enough to cause fuse-bonding. The margins of the finished envelope are held together not only by fuse-bonding, but by the presence of the crowns, which, penetrating right through the holes in the paper, serve as mechanical rivets.
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Anthony Asquith Corp.
Desai Hemant M.
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