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. 01, 2014
Filed:
Jun. 02, 2011
Ho Kyung Lee, Daejeon, KR;
Chang Song Lee, Daejeon, KR;
Kyu Hwang Lee, Daejeon, KR;
Eung Jin Jang, Chungcheongbuk-do, KR;
Joong Suk Nah, Chungcheongbuk-do, KR;
Ho Kyung Lee, Daejeon, KR;
Chang Song Lee, Daejeon, KR;
Kyu Hwang Lee, Daejeon, KR;
Eung Jin Jang, Chungcheongbuk-do, KR;
Joong Suk Nah, Chungcheongbuk-do, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Disclosed herein is an apparatus for preparation of a film exhibiting polarizing properties by dyeing a substrate film with iodine and then orienting the same through a continuous process, comprising a first bath equipped with a thermometer to measure a temperature of the first bath; a second bath equipped with a thermometer to measure a temperature of the second bath and a densitometer to measure a concentration of the second bath; a third bath in which the iodine-dyed PVA film is stretched by a drawing roller; an oven equipped with a thermometer to measure a temperature of the oven; and a central controller that predicts a transmittance of the polarizing film, and then, controls the temperatures of the first and second baths and the oven and an amount of a composition fed to the second bath.