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:
Oct. 17, 1995
Filed:
Dec. 21, 1994
Eizo Tsunoda, Komoro, JP;
Yutaka Shimizu, Saku, JP;
Naomi Yoshiike, Kitamimaki, JP;
Katsumi Onozawa, Saku, JP;
Kazuo Katai, Saku, JP;
Eiichi Watanabe, Saku, JP;
TDK Corporation, Tokyo, JP;
Abstract
In a coating method of extruding a coating liquid through a slit of an extrusion-type coating head to coat a running web, at a starting or restarting of the coating, the coating liquid is extruded through the slit of the coating head while the coating head is away from the web, and then the coating is started while a slightly large clearance is kept between the coating head and the web at the upstream side of the coating head, thereafter changing the coating state or arrangement to a steady coating state. Therefore, occurrence of a thicker portion of the coating film on the web at the start of the coating can be prevented. Further, at the end or interruption of the coating, the coating state or arrangement of the coating head is changed from the steady coating state to a state wherein a slightly large clearance is kept between the coating head and the web at the upstream side, and the coating head is moved away from the web to end the coating. Therefore, occurrence of a thicker portion of the coating film on the web at the end of the coating can be prevented. With this arrangement, at the start, restart, end and interruption of the coating, a uniformly coated film can be also formed on one surface of the web whose other surface has already been coated with a coating liquid.