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:
Jul. 19, 2005
Filed:
Mar. 07, 2002
Atsuhiro Takata, Toyonaka, JP;
Ryuma Kuroda, Ibaraki, JP;
Satoshi Hanada, Ibaraki, JP;
Takeshi Yamada, Takatsuki, JP;
Atsuhiro Takata, Toyonaka, JP;
Ryuma Kuroda, Ibaraki, JP;
Satoshi Hanada, Ibaraki, JP;
Takeshi Yamada, Takatsuki, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
To provide a slitting method of a battery separator-use resin film object that is less susceptible to occurrences of holes and tearing at the time of a slitting process. A slitting device, which is provided with a feeding roll 51 for feeding a film that is wound up to a role with its rotational velocity being controlled, a razor blade for slitting the film to a predetermined width, a sensor for detecting a tension of the film and winding rolls for winding the film up while controlling its tension, is used for carrying out a slitting process in a manner so as to satisfy the following conditions (1) and (2): (Condition 1) 5×9.8×10≦T/L≦5×9.8×10(Condition 2) 1≦R/T≦5 where L is a thickness (m) of the film object, R is a rotational velocity (m/min) of the feeding roll and T is a tension (N/m) of the film object after having been subjected to the slitting operation.