Rupture lines in flexible packages

Details Rupture lines in flexible packages Rupture lines in flexible packages

1976-11-01

1980-10-07

Garbe, Stephen P.

Special receptacle or package

With pallet feature

Knockdown or collapsible type

206219, B65D 3336, B65D 7730, B65D 2508

Patent

active

042263301

ABSTRACT:
Method and apparatus for producing rupturable areas in thermoplastic film wherein said film is used to make closed flexible containers or packages that are easily ruptured for the release of contents contained therein. The apparatus is comprised of a male mold portion and a female mold portion having the film interposed therebetween. Application of heat and pressure to the film by the male and female mold portions cause the plastic film to extrude outwardly from the impression area thereby forming a weakened line or area in the film by selectively reducing the thickness thereof. The film is then formed into flexible packages having the rupture area in a selected position.

REFERENCES:
patent: 758672 (1904-05-01), Mayall
patent: 2687130 (1954-08-01), Cohen
patent: 2899318 (1959-08-01), Long
patent: 3186628 (1965-06-01), Rohoe
patent: 3255872 (1966-06-01), Long et al.
patent: 3331499 (1967-07-01), Jost
patent: 3342324 (1967-09-01), Piazze
patent: 3674134 (1972-07-01), Turner
patent: 3788374 (1974-01-01), Saijo
patent: 3907193 (1975-09-01), Heller
patent: 3950158 (1976-04-01), Gossett

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