Packaging bag

Flexible bags – Bag having means to facilitate opening it by severing bag... – Line of weakness delineates substantially the entire tearing...

Reexamination Certificate

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Details

C383S204000, C383S208000, C383S209000, C383S116000

Reexamination Certificate

active

06964520

ABSTRACT:
In a bag10for packaging having a first face10A and a second face10B that are mutually opposite, a first line of weakness100A (100B) and a second line of weakness200A (200B) and a third line of weakness300A (300B) constituted by a plurality of breaks of perforation form arranged between the first line of weakness and the second line of weakness and having an inclination with respect to a prescribed unsealing direction L50are respectively formed in the first face and the second face such that these are arranged in mutually parallel fashion, and the plurality of breaks of perforation form constituting the third line of weakness formed in the first face and the plurality of breaks of perforation form constituting the third line of weakness formed in the second face are formed inclined in mutually opposite directions with respect to the prescribed unsealing direction. In this way a finger-grip portion of suitable extent is formed at the unsealed aperture of the bag for packaging after unsealing.

REFERENCES:
patent: 1516090 (1924-11-01), Gary et al.
patent: 2117738 (1938-05-01), Otto
patent: 2967010 (1961-01-01), Cuffey, Jr. et al.
patent: 3146912 (1964-09-01), Twersky
patent: 3451539 (1969-06-01), Wysocki
patent: 3514032 (1970-05-01), Pierce
patent: 4008849 (1977-02-01), Baber
patent: 5198276 (1993-03-01), Nakajima
patent: 7-35365 (1995-06-01), None
patent: 8-324597 (1996-12-01), None
patent: 2566444 (1997-12-01), None

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