Method for fabricating a perforated film and its apparatus
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United States of America Patent
Stats
-
Nov 30, 1993
Grant Date -
N/A
app pub date -
Sep 4, 1992
filing date -
Jan 10, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for fabricating a perforated film comprising the steps of pinching a film material, (3) between a cutter roll (1) with cutting edges (12) and a backing roll (2) to press the cutting edges (12) to the film material (3) and driving, to rotate least one of the cutter roll (1) and the backing roll (2), to form holes such as slits in a film material. The apparatus is decelerated by a stop command signal of an apparatus, detecting the speed of the apparatus attaining a predetermined small speed, generating an advance stop signal when the apparatus is approaching a stop a condition, and displacing the backing roll (2) so that the cutter roll is separated from the backing roll.
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