Process of embossing and perforating thermoplastic film
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United States of America Patent
Stats
-
Jul 28, 1981
Grant Date -
N/A
app pub date -
May 23, 1979
filing date -
May 23, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the process of embossing film by continuously passing the film through a nip formed by cooperating pattern and backup rolls, the improvement of passing the embossed pattern while in registration with the pattern roll through a second nip to improve the pattern detail. The apparatus includes a second backup roll in pressurized contact with the pattern roll forming the second nip. The surface configuration of the rolls may be such as to locally perforate the film within the pattern.
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