Package making – Methods – Closing package or filled receptacle
Patent
1987-06-10
1989-10-10
Norton, Donald F.
Package making
Methods
Closing package or filled receptacle
53488, 53490, 215344, 215DIG1, 264295, 264296, 264320, 264339, B65D 5300
Patent
active
048723045
ABSTRACT:
In combination, a container and a linerless cap and a method of forming the cap. In the method the cap is molded from plastic and includes a top well, an outer depending skirt and an internal depending substantially annular wall having an upper end integral with and depending from the top wall and a lower free end. Thereafter the free end is engaged by a curling tool to progressively turn the free end away from the internal wall to curve the free end into a curvilinear compressible and resilient free end adapted to be engaged for sealing. The engageable free end of the seal can have a coil, O, U, J or quarter round cross sectional shape and can be a rim, plug or corner seal.
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Cyrogenics (Jul. 1980)-M. Shinohara, T. Kugo, and K. Ono, Superleak-Tight Stainless Steel Hollow O-Ring Seals for Cryogenic Use.
Norton Donald F.
Tri-Tech Systems International Inc.
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