Coating processes – With pretreatment of the base – Etching – swelling – or dissolving out part of the base
Reexamination Certificate
2003-08-01
2010-10-19
Cleveland, Michael (Department: 1712)
Coating processes
With pretreatment of the base
Etching, swelling, or dissolving out part of the base
Reexamination Certificate
active
07815972
ABSTRACT:
A polarizing film is provided that prevents display unevenness and can form a liquid crystal display and an electroluminescence display that exhibit excellent display characteristics. The polarizing film is produced in the following manner. That is, a hydrophilic polymer film is conveyed by means of a guide roll so as to be impregnated in an aqueous solvent in a swelling bath and is allowed to swell. In this swelling step, at least a first guide roll is arranged in the swelling bath, and when the polymer film is impregnated in and allowed to travel in the aqueous solvent, the polymer film is brought into contact with the first guide roll within a time up to when swelling reaches a saturation state. Further, the polymer film is dyed using a dichroic substance and stretched.
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Office Action mailed Jul. 31, 2008 in Corresponding Japanese Patent Application No. 2003-284411.
Kameyama Tadayuki
Mizushima Hiroaki
Sugino Youichirou
Tomoguchi Naoki
Wada Morimasa
Cleveland Michael
Empie Nathan H
Nitto Denko Corporation
Westerman Hattori Daniels & Adrian LLP
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