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. 29, 2019
Filed:
Jan. 24, 2017
Applicant:
Sumitomo Chemical Company, Limited, Chuo-ku, Tokyo, JP;
Inventor:
Akinobu Sakamoto, Niihama, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B65H 75/10 (2006.01); B65H 75/18 (2006.01); H01M 2/14 (2006.01); H01M 2/16 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
B65H 75/10 (2013.01); B65H 75/18 (2013.01); H01M 2/145 (2013.01); B65H 2701/5122 (2013.01); H01M 2/1653 (2013.01); H01M 10/0525 (2013.01);
Abstract
In order to provide a film roll that includes a core having improved rigidity without increasing a cost, the present invention provides a film roll including: a cylindrical core; and a film wound around an outer peripheral surface of the core, the core satisfying the following inequality: D×0.0017+0.50<T1/T2<D×0.0017+0.95, wherein D (mm) denotes a difference between an outer diameter of the core and an inner diameter of the core, T1 (mm) denotes a thickness of an outer peripheral part, and T2 (mm) denotes a thickness of an inner peripheral part.