Unit for production of tubular resin film

Details Unit for production of tubular resin film Unit for production of tubular resin film

2003-12-24

2009-12-01

Davis, Robert B (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Continuous filament forming or film casting means with...

C264S565000, C264S209500, C264S290200, C425S072100, C425S325000, C425S326100, C425S387100, C425S384000, C425S393000

Reexamination Certificate

active

07625194

ABSTRACT:
A manufacturing apparatus is provided for manufacturing a tubular resin film of high quality and little thickness variations, which is stretched and given an orientation, and suitable as retardation film or the like. It comprises a stretching section (6) for stretching the tubular resin film (20), and a maintaining section (7) for maintaining a shape of said tubular resin film (20) stretched. Further, said stretching section (6) is arranged to apply a stretching force to said tubular resin film for longitudinally and/or circumferentially stretching said tubular resin film (20).

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Office Action issued by Chinese Patent Office, dated Sep. 29, 2006.

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