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. 11, 1988
Filed:
Nov. 09, 1987
Andreas Ahlbrandt, Lauterbach, DE;
Other;
Abstract
A device for the continuous treatment of surfaces of thin sheet material (24) includes a treatment roller (7) arranged in a treatment chamber (1) operated at a reduced pressure. A pair of guide rollers (17) and (18) guide a web to be treated through the chamber (1). Each guide roller is sealed by a sealing unit (22) and (23) to provide greater pressure reduction inside the chamber. The sealing units are hollow, with vacuum ports (27) exposed to the sealing surface (26) formed with the guide rollers (17) and (18). A corona electrode (14) is arranged in the wall of this treatment chamber (1) in such a manner that its insulation (15) forms one part of the wall, but the high voltage element (16) of the corona electrode (14) is located outside of the treatment chamber.