	US 7,575,773 B2
	Optical compensatory sheet producing method and apparatus, thermal treating method and apparatus, and dust removing method and apparatus
Seiji Ishizuka, Kanagawa (Japan); Munehiro Ura, Kanagawa (Japan); Tadashi Sugiyama, Kanagawa (Japan); Kenji Nakajima, Kanagawa (Japan); Kazuhiko Fujiwara, Kanagawa (Japan); and Naoyuki Kawanishi, Kanagawa (Japan)
Assigned to FUJIFILM Corporation, Tokyo (Japan)
Filed on Mar. 17, 2006, as Appl. No. 11/377,672.
Application 10/919377 is a division of application No. 09/851416, filed on May 09, 2001, granted, now 6,812,982.
Application 11/377672 is a continuation of application No. 10/919377, filed on Aug. 17, 2004, abandoned.
Claims priority of application No. 2000-140023 (JP), filed on May 12, 2000; application No. 2000-204557 (JP), filed on Jul. 06, 2000; and application No. 2000-220330 (JP), filed on Jul. 21, 2000.
Prior Publication US 2006/0177587 A1, Aug. 10, 2006
Int. Cl. B05D 5/06 (2006.01); B05D 3/04 (2006.01)

U.S. Cl. 427—58 [118/68; 349/76; 427/377; 427/378; 454/252]

3 Claims

1. A thermal treating method for a dried coating layer, the coating layer formed by coating traveling web with coating liquid, comprising:

blowing said dried coating layer with hot air through an air blow opening; and sucking said hot air from said dried coating layer in a position upstream or downstream from said air blow opening according to a traveling direction of said web such that, while said hot air flows on said dried coating layer in the traveling director of said web, a flow speed of said hot air remaining equal to or lower than 1 m/sec with reference to a web width direction;

wherein said flow speed of said hot air in said web width direction is less than the flow speed of said hot air in said traveling direction of said web;

wherein said thermal treating is used in a process of forming a liquid crystal layer in a production of an optical compensatory sheet, and said coating contains a liquid crystalline compound.