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:
Jun. 02, 2020
Filed:
Nov. 08, 2018
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Daizaburo Yashiki, Niihama, JP;
Daijiro Hoshida, Niihama, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 10/0587 (2010.01); B65H 75/10 (2006.01); H01M 2/14 (2006.01); H01M 2/18 (2006.01); H01M 4/13 (2010.01); H01M 10/052 (2010.01); H01M 2/16 (2006.01); H01M 10/04 (2006.01); H01M 10/0567 (2010.01);
U.S. Cl.
CPC ...
H01M 10/0587 (2013.01); B65H 75/10 (2013.01); H01M 2/14 (2013.01); H01M 2/145 (2013.01); H01M 2/168 (2013.01); H01M 2/18 (2013.01); H01M 4/13 (2013.01); H01M 10/049 (2013.01); H01M 10/052 (2013.01); H01M 10/0567 (2013.01); B65H 2401/115 (2013.01); B65H 2701/5122 (2013.01); B65H 2701/534 (2013.01); B65H 2701/535 (2013.01);
Abstract
A core (u, u) around which a nonaqueous electrolyte secondary battery separator is to be wound. A side surface of the core (u, u) has a depression (). This makes it possible, in a case where cores (separator cores) are stored by being stacked while still wet after cleaning, to prevent damage to a core caused by a problem where cores stick together and an core lower in a stack falls when a core higher in the stack is removed.