Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Severing means is perforator
Patent
1986-01-23
1989-11-07
Miles, Tim
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Severing means is perforator
425388, 264504, B29C 7100
Patent
active
048788252
ABSTRACT:
Apparatus for uniformly macroscopically expanding and, if desired, aperturing a plastic web. This is preferably accomplished by supporting the plastic web on a moving three-dimensional forming structure which is supported in a fluid pressure differential zone by a stationary support member. By providing a relationship between the size and pattern of the apertures in the stationary support member and the size and pattern of the apertures in the three-dimensional forming structure, substantially all of the apertures present in the forming structure are unobstructed by the stationary support member at some point during the forming structure's traverse of the fluid pressure differential zone. Thus the resultant plastic web is uniformly debossed and, if desired, apertured in the pattern of the three-dimensional forming structure.
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Gorman John V.
Linman E. Kelly
Miles Tim
The Procter & Gamble & Company
Witte Richard C.
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