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:
Aug. 13, 2024
Filed:
Feb. 05, 2020
Applicant:
Toyobo Co., Ltd., Osaka, JP;
Inventors:
Masayuki Haruta, Inuyama, JP;
Norimi Tabota, Osaka, JP;
Assignee:
TOYOBO CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/305 (2019.01); B29C 48/92 (2019.01); B29C 55/14 (2006.01); B29K 67/00 (2006.01);
U.S. Cl.
CPC ...
B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/307 (2019.02); B29C 48/92 (2019.02); B29C 55/143 (2013.01); B29C 2948/92704 (2019.02); B29K 2067/003 (2013.01);
Abstract
To provide a biaxially-oriented polyester film roll that is excellent in transparency and heat resistance and has less defects. A biaxially oriented polyester film roll of the present invention characterized by satisfying requirements (1) a winding length of the film roll, (2) a width of the film roll, (3) an average hardness of an outermost surface layer of the polyester film roll, (4) a variation in hardness, (5) a thickness of a polyester film of the polyester film roll, and (6) an irregularity of thickness in the maximum concave portion.