Apparatus for producing rupture lines in flexible packages

Details Apparatus for producing rupture lines in flexible packages Apparatus for producing rupture lines in flexible packages

1976-04-26

1977-12-06

Baldwin, Robert D.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

425396, B29C 1500

Patent

active

040614573

ABSTRACT:
Method and apparatus for producing rupturable areas in thermoplastic film wherein said film is used to make closed flexible containers of 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: 1827927 (1931-10-01), Barber
patent: 2451794 (1948-10-01), Balsam et al.

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