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:
Jan. 24, 2012
Filed:
Mar. 02, 2006
Ryo Takeda, Kanagawa, JP;
Ryo Takeda, Kanagawa, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
Solution casting of polymer film () is provided. A dope (-) containing a polymer of cellulose triacetate and solvent is cast on a casting support band () which moves, to form a cast film (), and then the cast film is stripped from the casting support band and dried, to produce the polymer film. In the solution casting, the cast film is cooled shortly before stripping the cast film from the casting support band. Preferably, a cooling temperature to which the cast film is cooled is set lower than 6 deg. C. The cast film is cooled within a predetermined cooling region, disposed to start at a stripping point for the cast film, and to extend upstream therefrom with a length equal to or less than 25% of the length of the casting support band. The cast film is blown by cooling gas caused to flow for cooling.