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. 16, 2013
Filed:
Dec. 18, 2000
Ieyasu Kobayashi, Kanagawa, JP;
Mitsuo Tojo, Kanagawa, JP;
Tsuyonari Nohira, Kanagawa, JP;
Shinji Muro, Kanagawa, JP;
Hirofumi Murooka, Kanagawa, JP;
Ieyasu Kobayashi, Kanagawa, JP;
Mitsuo Tojo, Kanagawa, JP;
Tsuyonari Nohira, Kanagawa, JP;
Shinji Muro, Kanagawa, JP;
Hirofumi Murooka, Kanagawa, JP;
Teijin Limited, Tokyo, JP;
Abstract
A polyester film roll is rolled on a core, wherein the difference R (m) between the maximum value and the minimum value of the diameters of the roll is not more than 2W×10and not more than L×10, when the diameters of said roll are measured in the width direction of the roll, (therein, W is the width (m) of the film roll, and L is the length (m) of the rolled film). Alternatively, among the lengths of lines which are obtained by measuring the diameters of said roll in the width direction of the roll, drawing a straight line between both the ends of the curved line of the obtained roll diameters, the maximum distance on the convex portion between the curved and straight lines is not more than 500 μm, and the maximum distance on the concave portion of the same is not more than 300 μm.