METHOD OF MAKING A PROTECTIVE FILM
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United States of America Patent
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Issued Date -
Nov 11, 2010
app pub date -
May 7, 2010
filing date -
May 9, 2009
priority date (Note) -
Abandoned
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Abstract
A protective film is made by extruding a molten-plastic film from a slit nozzle into a nip formed between an outer face of a rotatable roll and a face of a metal belt. One of these faces is smooth. The belt is tensioned to press the film in the nip between the belt and the roll outer face. The belt or the roll is cooled to harden the film such that one face of the film engaging the smooth face of the roll or belt is rendered smooth and free of defects.
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