Flexible bags – Bag having means to facilitate opening it by severing bag... – Including a separate tearing element which is gripped and...
Patent
1991-01-22
1992-05-26
Garbe, Stephen P.
Flexible bags
Bag having means to facilitate opening it by severing bag...
Including a separate tearing element which is gripped and...
383 61, 383 66, B65D 2738
Patent
active
051161400
ABSTRACT:
An easy-to-open synthetic resin bag comprises (a) a bag body substantially consisting of a pair of laminated walls made of synthetic resin films, the peripheries of the laminated walls being heat-sealed to form a sealed border region while defining an unsealed storing space within the sealed border region, (b) a tear string which is heat sealed along an imaginary opening line on the inside of one of the laminated walls, the tear string having both ends thereof heat sealed in a sandwiched condition on the corresponding portion of the sealed border region, (c) a pulling tab formed by cutting a part of one side portion of the sealed border region which corresponds to one end of the tear string, the pulling tab being tearable from the bag body integrally with the tear string, and (d) a tear string retaining portion comprising a transverse opening which is formed by cutting off a part of the other side portion of the sealed border region and a pair of inside and outside heat sealed portions which are located at both sides of the transverse opening, the transverse opening extending in a direction perpendicular to the tear string such that the tear string passes through a central portion of the transverse opening. Due to such a tear string retaining portion, the separation and complete removal of the tear string from the bag is reliably prevented while assuring the easy bag opening operation.
REFERENCES:
patent: 3266965 (1966-08-01), Spees
patent: 3619395 (1971-11-01), Skendzic
patent: 3827472 (1974-08-01), Uramoto
patent: 4629071 (1986-12-01), Tani
patent: 4650079 (1987-03-01), Tani
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