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:
Mar. 09, 1993
Filed:
Sep. 26, 1990
Applicant:
Inventors:
Yukio Inokuti, Chiba, JP;
Yo Ito, Chiba, JP;
Assignees:
Kawasaki Steel Corp., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ; C23C / ;
U.S. Cl.
CPC ...
427172 ; 427295 ; 118 50 ; 118718 ; 118719 ; 118733 ;
Abstract
A differential pressure sealing apparatus and method for processing a continuously moving elongated sheet through successively different stages of vacuum. A vacuum chamber is provided with an inlet and a guide roller for the incoming sheet with the sheet urged against the guide roller over a wrap contact angle of 15 to 120 degrees. To resist the entrance of air into the chamber, a sealing structure encompasses at least portions of the entrance, the guide roller and the sheet.