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:
Feb. 15, 1994
Filed:
Feb. 14, 1992
Keiichi Ishizaki, Kanagawa, JP;
Takashi Takeuchi, Kanagawa, JP;
Mutsuo Akao, Kanagawa, JP;
Hiroyuki Osanai, Kanagawa, JP;
Shinichi Fujii, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Minami-Ashigara, JP;
Abstract
A substrate of a photosensitive web material of which the base end portion is gradually thinned toward the base end a core for a rolled photographic film which comprises a core body and a crosslinked foamed sheet having an expansion ratio of 18 to 45 times and a thickness of 0.2 to 2.0 mm which contains more than 50 wt. % in the sum of one or more members selected from the group consisting of polyethylene resin having a density of less than 0.930 g/cm.sup.3, ethylenevinyl acetate copolymer resin having a comonomer content of less than 25 wt. % and ethylene-ethyl arcylate copolymer resin having a comonomer content of less than 25 wt. % is disposed on the surface of the core body. The substrate and core sharply reduce the occurrence of marking troubles and pressure mark troubles on the photosensitive web material near the core caused by the difference in levels induced by the base end portion of the web.