Apparatus for producing perforated plastic film

Details Apparatus for producing perforated plastic film Apparatus for producing perforated plastic film

1983-06-01

1985-09-17

Silbaugh, Jan

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

264504, 425388, B29C 1704

Patent

active

045417946

ABSTRACT:
An apparatus for the manufacture of selectively apertured thermoplastic sheet or film, comprising a rotatable molding element means for receiving the film and which means has a predetermined pattern therein wherein as the film is contacted with the rotatable molding element means and a fluid pressure differential is applied to the surface of the film, a desired pattern of perforated areas and non-perforated areas are imparted to the film with each of said areas being continuous across the web of the film and alternating in the machine direction.

REFERENCES:
patent: 3679535 (1972-07-01), Kalwaites
patent: 4151240 (1979-04-01), Lucas et al.
patent: 4395215 (1983-07-01), Bishop

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