Easily openable sealed container

Details Easily openable sealed container Easily openable sealed container

1990-12-19

1993-01-05

Marcus, Stephen

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

2291231, 229246, B66D 4314

Patent

active

051763141

ABSTRACT:
The present invention provides an easily openable sealed container consisting of a lid and a main body having a flange, wherein a sealing layer of the main body or a sealing layer of the lid has a number of microdents in the flange portion, the thickness of said sealing layer is 10-1000 .mu., said sealing layer and an adjacent layer contacting therewith have a lamination strength of 300-2,000 g/25 mm width, and said sealing layer and the lid or the main body are sealed in the flange portion at a strength larger than said lamination strength, as well as a process for producing said sealed container.

REFERENCES:
patent: 3547338 (1970-12-01), Hemmes
patent: 3783089 (1974-01-01), Hurst et al.
patent: 4000816 (1977-01-01), Spruyt
patent: 4381848 (1983-05-01), Kahn
patent: 4636273 (1987-01-01), Wolfersperger
patent: 4693390 (1987-09-01), Hekal
patent: 4715528 (1987-12-01), Kjelgaard
patent: 4771937 (1988-09-01), Kamada et al.
patent: 4857369 (1989-08-01), Oehlenschlaeger et al.
patent: 4865217 (1989-09-01), Yoshimoto
patent: 4961573 (1990-10-01), Gossedge et al.
patent: 5002223 (1991-03-01), Bolte et al.
Japanese Industrial Standard: Testing Methods for Peel Strength of Adhesives, JIS K 6854-1977, Translated and Published by Japanese Standards Association.

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