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:
Sep. 13, 2016
Filed:
Sep. 01, 2011
Takeharu Kitagawa, Ibaraki, JP;
Takuya Nakazono, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Tomohiro Mori, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Takuya Nakazono, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Tomohiro Mori, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
NITTO DENKO CORPORATION, Ibaraki-Shi, Osaka, JP;
Abstract
A method of producing a roll of an optical film laminate strip including a polarizing film includes the steps of: forming a continuous web of optical film laminate including a polarizing film which consists of a polyvinyl alcohol type resin layer and has a thickness of 10 μm or less, wherein the polarizing film is formed by performing an stretching sub-step of subjecting a laminate comprising a continuous web of thermoplastic resin substrate and a polyvinyl alcohol type resin layer formed on the substrate, to a uniaxial stretching in a lengthwise direction of the laminate based on 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching; cutting the continuous web of optical film laminate along a direction parallel to the length direction to form at least one continuous web of laminate strip having a given width; and winding the continuous web of laminate strip having the given width into a roll.