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:
Sep. 08, 1998
Filed:
Sep. 06, 1996
Norio Takagi, Sagamihara, JP;
Teijin Limited, Osaka, JP;
Abstract
A process for producing a biaxially oriented polyester film including the steps of causing a molten aromatic polyester which contains naphthalene-2,6-dicarboxylatic acid as a main dicarboxylic acid component and ethylene glycol as a main glycol component to pass through a single-layer or multi-layer metal fiber nonwoven fabric, melt extruding the molten polymer into a form of a sheet, quenching and solidifying the sheet to produce an unoriented film, biaxially orienting the unoriented film, and thermally setting the biaxially oriented film to form a biaxially oriented polyester film, as a base film for a photographic film, which contains substantially no gel as large as 40 .mu.m or more.