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:
Oct. 06, 1992
Filed:
Apr. 17, 1991
Ryo Takeda, Kanagawa, JP;
Hisashi Shiraishi, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A cellulose triacetate film excellent in both of the tear strength and the folding endurance can be obtained by casting a cellulose triacetate dope using a solvent mixture of methylene chloride with the other solvent in a ratio of 13 to 25 wt. % of the total solvent weight on a support of which the surface temperature is kept lower than 10.degree. C., and drying with controlling the drying conditions so that the content of volatile components in the film and the film surface temperature enter a particular region or so that the content of volatile components in the film and the shrinkage percentage of the film in the cross direction enter in a particular region. The film thus obtained is also excellent in flatness.