Apparatus and method for flame-perforating films

Details Apparatus and method for flame-perforating films Apparatus and method for flame-perforating films

2011-07-19

2011-07-19

Gupta, Yogendra N (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

Shaping or casting surface

Endless shaping surface

C425SDIG037, C425S290000, C264S080000

Reexamination Certificate

active

07980849

ABSTRACT:
An apparatus and methods for flame-perforating films. A preferred embodiment of the apparatus includes a frame, support surface attached to the frame, where the support surface includes a plurality of lowered portions, a burner attached to the frame opposite the support surface, where the burner supports a flame, and where the flame includes a flame tip opposite the burner and a film contacting the support surface, where the flame of the burner is in contact with the film, where the burner is positioned such that the distance between an unimpinged flame tip of the flame and the burner is at least one-third greater than the distance between the film and the burner.

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