Method for creating a seal gasket at the top of a container...

Details Method for creating a seal gasket at the top of a container... Method for creating a seal gasket at the top of a container...

2008-01-01

2008-01-01

Lee, Edmund H. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

C264S268000, C264S275000

Reexamination Certificate

active

07314589

ABSTRACT:
A method for creating a seal gasket in the closure cap of a container starting from a cap formed separately, characterised by comprising the following operations: inserting into a cap (1, 10, 100) a first portion (3, 30, 300) of material in the plastic state having barrier properties against O2, CO2, or other gases; inserting a first die (4, 40, 400) to subject said first portion of material to compression in order to form on the base of the cap a first layer (5, 50, 500) of material having barrier properties against said gases; inserting into the cap onto said first layer a second portion (6, 60, 600) of material in the plastic state having hydraulic sealing properties; and inserting a second die (7, 70, 700) to subject said second portion of material to compression in order to form on said first layer a second layer (8, 80, 800) with hydraulic sealing properties.

REFERENCES:
patent: 3637103 (1972-01-01), Ptak
patent: 4723678 (1988-02-01), Kollen et al.
patent: 6306330 (2001-10-01), Cerny
patent: 6656406 (2003-12-01), Parrinello
patent: 6660349 (2003-12-01), Bourgeois
patent: 7021478 (2006-04-01), Hock
patent: 0 920 967 (1999-06-01), None
patent: 0 926 078 (1999-06-01), None
patent: 1 081 058 (2001-03-01), None

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