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:
Feb. 26, 1985
Filed:
Jun. 18, 1984
Susumu Ueno, Ibaraki, JP;
Kouiti Kuroda, Ibaraki, JP;
Hajime Kitamura, Ichihara, JP;
Masaie Tohkai, Ibaraki, JP;
Ken-ichi Kato, Tokyo, JP;
Nobuyuki Hiraishi, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A continuous vacuum treating apparatus for subjecting a workpiece of soft material, such as a plastic molding to continuous surface treatment by an air-to-air system in vacuum, including a vacuum treating chamber and a plurality of auxiliary vacuum chambers located anterior and posterior to the vacuum treating chamber. The diameter of each of an upper seal roll and a lower seal roll of each of the auxiliary vacuum chambers located on the vacuum treating chamber side is smaller than the diameter of each of an upper seal roll and a lower seal roll of the auxiliary vacuum chamber located closest to the atmosphere.