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:
Nov. 07, 2006
Filed:
Aug. 06, 2003
Toshinao Arai, Minami-Ashigara, JP;
Hidekazu Yamazaki, Minami-Ashigara, JP;
Tadahiro Tsujimoto, Minami-Ashigara, JP;
Toshinao Arai, Minami-Ashigara, JP;
Hidekazu Yamazaki, Minami-Ashigara, JP;
Tadahiro Tsujimoto, Minami-Ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
The present invention provides a solvent casting process which comprises casting a dope which is a solution containing at least one kind of a polymer from a casting die onto a casting support, stripping off from the casting support and drying, wherein the force necessary for stripping off the dope from the die lip end of the casting die is 40 g/cm or smaller. According to the present invention, the employment of the foregoing constitution prevents the formation of the slugs at lateral edge portions of the dope because the cast dope would not adhere to the die lip end portion of the casting die. As a result, because a breaking down of the film would not occur without washing the apparatus, an efficient production of a film having superior evenness in the flatness can be achieved.