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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.:

US 9744750 B1

PDFFull Text
Date of Patent:
Aug. 29, 2017

Filed:

Mar. 05, 2015

Method and apparatus for continuously producing optical panel assemblies

Applicant:

Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;

Inventors:

Takeharu Kitagawa, Ibaraki, JP;

Takuya Nakazono, Ibaraki, JP;

Shusaku Goto, Ibaraki, JP;

Minoru Miyatake, Ibaraki, JP;

Tomohiro Mori, Ibaraki, JP;

Takashi Kamijo, Ibaraki, JP;

Assignee:

NITTO DENKO CORPORATION, Ibaraki-Shi, Osaka, JP;

Attorney:

Hauptman Ham, LLP

Primary Examiner:

Sing P Chan

Int. Cl.
CPC ...
B29C 65/52 (2006.01); B29C 65/54 (2006.01); B32B 37/12 (2006.01); B32B 37/20 (2006.01); B32B 38/04 (2006.01); B32B 38/10 (2006.01); B32B 38/18 (2006.01); B32B 41/00 (2006.01); B32B 43/00 (2006.01); B32B 37/00 (2006.01); B29C 55/02 (2006.01); B29C 55/06 (2006.01); G02B 5/30 (2006.01); B29K 29/00 (2006.01); B29K 67/00 (2006.01); B32B 37/18 (2006.01); B32B 38/00 (2006.01); B32B 37/24 (2006.01);
U.S. Cl.
CPC ...
B32B 37/0046 (2013.01); B29C 55/023 (2013.01); B29C 55/026 (2013.01); B29C 55/065 (2013.01); B32B 37/025 (2013.01); B32B 37/18 (2013.01); B32B 37/203 (2013.01); B32B 38/04 (2013.01); B32B 38/10 (2013.01); B32B 38/18 (2013.01); G02B 5/305 (2013.01); B29K 2029/04 (2013.01); B29K 2067/003 (2013.01); B29K 2995/0034 (2013.01); B32B 37/12 (2013.01); B32B 37/182 (2013.01); B32B 38/0004 (2013.01); B32B 38/145 (2013.01); B32B 2037/243 (2013.01); B32B 2038/045 (2013.01); B32B 2307/42 (2013.01); B32B 2309/72 (2013.01); B32B 2457/20 (2013.01); B32B 2457/202 (2013.01); B32B 2457/206 (2013.01); B32B 2457/208 (2013.01); B32B 2551/00 (2013.01); Y10T 156/1059 (2015.01); Y10T 156/1062 (2015.01); Y10T 156/1082 (2015.01); Y10T 156/12 (2015.01); Y10T 156/1322 (2015.01);
Abstract

A method of producing an optical panel assembly including the polarizing film in a continuous manner by laminating a polarizing film to a surface of a rectangular-shaped optical panel, is disclosed. The polarizing film is formed by performing a step of subjecting a laminate including a continuous web of a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to a 2-stage stretching consisting of a preliminary in-air stretching and an in-boric-acid-solution stretching, to reduce a thickness of the PVA type resin layer to 10 μm or less, and a step of causing a dichroic material to be absorbed in the PVA type resin layer.

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