Screen for producing a perforated film

Details Screen for producing a perforated film Screen for producing a perforated film

1994-06-14

1996-10-08

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

4253871, 425388, 264504, B28B 148

Patent

active

055629326

ABSTRACT:
A cylindrical screen for perforating a thermoplastic film or sheets. The screen is formed from a relatively thin sheet that is secured together to form a cylindrical shape. A plurality of apertures are positioned in the sheet and the apertures in the sheets forms a passageway through the screen. The passageways are disposed at an angle from about 5.degree. to about 60.degree. with respect to a plane that is disposed substantially perpendicular to the surface of the screen.

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