The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2019
Filed:
Mar. 06, 2014
Applicant:
Ube Industries, Ltd., Ube-shi, Yamaguchi, JP;
Inventors:
Assignee:
UBE INDUSTRIES, LTD., Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29L 7/00 (2006.01); B29C 31/08 (2006.01); B29C 35/04 (2006.01); B29C 71/02 (2006.01); B29K 79/00 (2006.01);
U.S. Cl.
CPC ...
B29C 71/02 (2013.01); B29C 31/08 (2013.01); B29C 35/045 (2013.01); B29C 2071/022 (2013.01); B29K 2079/08 (2013.01); B29L 2007/008 (2013.01);
Abstract
A film manufacturing method and manufacturing apparatus for manufacturing a film having excellent dimensional stability to heat at a good product yield and performing a stress relaxation treatment of the film include performing the stress relaxation treatment while conveying the film in a non-contact state using a levitation conveyance device for jetting a heated gas from gas injection holes to the film and conveying the film in a non-contact state. The film manufacturing method and manufacturing apparatus are particularly suitable for stress relaxation treatment of a polyimide film obtained by heat-treating a polyimide film precursor.