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:
Jan. 22, 2013
Filed:
Sep. 20, 2006
Kouji Tonohara, Minami-ashigara, JP;
Kouji Tonohara, Minami-ashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A casting dope () prepared from CAP, additive and solvent is cast onto a casting belt (), peeled and dried to be a primary film (), and wound to a primary film roll (). After the storage, the primary film () is unwound and fed into a tenter device (). In the tenter device (), while the stretch in the widthwise direction is performed, a relaxation of the primary film () in the longitudinal direction is made. If an extent percentage of the stretch is less than 70% to the predetermined value, the relation is started. The primary film () is fed out as a produced polymer film () from the tenter device (), and the polymer film () is wound up to a product film roll (). On the produced polymer film (), the in-plane retardation increases and the thickness retardation decreases. Thus the optical properties become preferable.