Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Reshaping or treatment of an optical preform
Reexamination Certificate
2011-01-11
2011-01-11
Hon, Sophie (Department: 1783)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Reshaping or treatment of an optical preform
C349S117000, C428S001300
Reexamination Certificate
active
07867414
ABSTRACT:
A method of manufacturing a birefringent film includes stretching a polymer film in a widthwise direction while at the same time shrinking the same in a lengthwise direction so as to satisfy the relational expression: (1/STD)1/2≦SMD<1, in which the length in the widthwise direction and the length in the lengthwise direction, of the polymer film before being stretched are respectively designated as 1, and STD represents a change ratio of the length in the widthwise direction of the polymer film due to stretching and SMD represents a change ratio of the length in the lengthwise direction of the polymer film due to shrinking, and make the stretched polymer film have an Nz coefficient of 0.9-1.1. This method achieves manufacturing of a birefringent film with a high production efficiency, while omitting the bowing phenomenon when manufacturing a birefringent film by stretching a polymer film in the widthwise direction, thereby limiting unevenness in birefringence, retardation and orientation angle and hence producing excellent optical characteristics, as well as achieving successive lamination when laminating with a polarizing film.
REFERENCES:
patent: 3229175 (1966-01-01), Strandberg
patent: 5241030 (1993-08-01), Barry et al.
patent: 5245456 (1993-09-01), Yoshimi et al.
patent: 5366682 (1994-11-01), Morikawa et al.
patent: 5402556 (1995-04-01), Rutz
patent: 5430565 (1995-07-01), Yamanouchi et al.
patent: 5519523 (1996-05-01), Madokoro et al.
patent: 5999243 (1999-12-01), Kameyama et al.
patent: 6542300 (2003-04-01), Umemoto
patent: 6606193 (2003-08-01), Umemoto
patent: 6760157 (2004-07-01), Allen et al.
patent: 7075604 (2006-07-01), Yano et al.
patent: 2002/0008840 (2002-01-01), Sakamaki et al.
patent: 2002/0130997 (2002-09-01), Yano et al.
patent: 2002/0190406 (2002-12-01), Merrill et al.
patent: 2003/0020208 (2003-01-01), Tasaka et al.
patent: 2004/0022965 (2004-02-01), Sakamaki et al.
patent: 2004/0052937 (2004-03-01), Ito et al.
patent: 2004/0058093 (2004-03-01), Nakashima
patent: 2004/0099992 (2004-05-01), Merrill et al.
patent: 2004/0119178 (2004-06-01), Kuwamura
patent: 2004/0241344 (2004-12-01), Kawanishi et al.
patent: 2005/0018328 (2005-01-01), Hata et al.
patent: 2005/0099562 (2005-05-01), Nishikouji et al.
patent: 2005/0213012 (2005-09-01), Yano et al.
patent: 2006/0077326 (2006-04-01), Ishibashi et al.
patent: 2006/0078693 (2006-04-01), Ishibashi et al.
patent: 2006/0262401 (2006-11-01), Takahashi et al.
patent: 2006/0275559 (2006-12-01), Ishibashi et al.
patent: 1 160 591 (2001-12-01), None
patent: H02-191904 (1990-07-01), None
patent: H03-23405 (1991-01-01), None
patent: 5-11114 (1993-01-01), None
patent: H05-249316 (1993-09-01), None
patent: 6-51119 (1994-02-01), None
patent: H06-51116 (1994-02-01), None
patent: 8-511812 (1996-12-01), None
patent: 10-508048 (1998-08-01), None
patent: 2000-190385 (2000-07-01), None
patent: 2000-511296 (2000-08-01), None
patent: 2001-49110 (2001-02-01), None
patent: 2001-343529 (2001-12-01), None
patent: 2002-90530 (2002-03-01), None
patent: 2002-296422 (2002-10-01), None
patent: 2003-315554 (2003-11-01), None
patent: 2004-144942 (2004-05-01), None
patent: 1991-0000870 (1991-01-01), None
patent: 2003-0022791 (2003-03-01), None
patent: 457390 (2001-10-01), None
patent: 571332 (2004-01-01), None
patent: WO 94/24191 (1994-10-01), None
patent: WO 96/11967 (1996-04-01), None
patent: WO 97/44704 (1997-11-01), None
JPO Website Machine English Translation of JP2002-269781, Nakajima Hiroshi, Apr. 8, 2004.
T. Yamada et al., “Analyses of Bowing Phenomena in Successive Transverse Stretching and Thermosetting Process for Biaxially Oriented Film”, Intern. Polymer Processing Vo. X Issue 4, pp. 334-340, 1995, Hanser Publishers.
Office Action of Korean Patent Application No. 10-2005-7019368 mailed Oct. 31, 2006.
Japanese Office Action dated Oct. 14, 2008 (mailing date), issued in Japanese Patent Application No. 2003-418558.
Machine translation of JP-04-305602. Oct. 28, 1992. Umemoto et al.
Machine translation of JP-2000-131693. May 2000. Omuro et al.
Machine translation of JP-2005-181450. Jul. 7, 2005. Ishibashi et al.
Japanese Office Action dated Feb. 19, 2010, issued in corresponding Japanese Patent Application No. 2005-034645.
Chinese Office Action dated Jul. 6, 2007 issued in corresponding Application No. 200510108461.1.
Taiwanese Office Action dated Oct. 19, 2010, issued in corresponding Taiwanese Patent Application No. 094135281.
Ishibashi Kuniaki
Yoshimi Hiroyuki
Hon Sophie
Nitto Denko Corporation
Westerman Hattori Daniels & Adrian LLP
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