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:
Jan. 05, 1993
Filed:
Jan. 25, 1991
Johann Baarfusser, Gauting, DE;
Lothar Langer, Munich, DE;
Frank Mannaberg, Groebenzell, DE;
Reinhold Nentwich, Diessen, DE;
BASF Magnetics GmbH, Mannheim, DE;
Abstract
A device for controlling webs of material, for example photographic films of webs of paper or magnetic tapes, in a so-called twin roller hollow suction means is described, wherein a pressure difference exists between the upper and lower side of the web in the region of the pair of rollers and wherein a respective sealing wedge is arranged according to the invention in the free interior (10) between the rollers (2, 3) on either side outwardly from the outer roller edges such that it passes beneath the edges (17) of the suspended web portion (5), the cross-sectional shape of the rollers is imitated and is at a small distance from the bearing faces of the rollers. In a particularly preferred embodiment, the sealing wedge is hollowed in the shape of a tank and extends transversely to the direction of travel falling away in the direction of the web center (FIG. 3).