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:
Dec. 03, 1991
Filed:
Jun. 06, 1990
Wolfgang Muller, Giengen, DE;
J. M. Voith GmbH, , DE;
Abstract
A paper web travels together with a support belt over two heatable drying cylinders and a guide roll between the cylinders, which together define a pocket. Vacuum prevails in the pocket upon operation. Above the pocket there is provided a sealing strip support with sealing strips fastened to it. The sealing strips are at the drying cylinders where they enter the pocket, and these strips counter the penetration of air into the pocket. The sealing strip support is moveable in various ways so that the distance between the sealing strips and the cylinder outer surfaces can be enlarged temporarily. The guide roll is hollow, is connectable with a vacuum source and has a perforated roll shell and is free of stationary inserted parts. A separate vacuum source communicates with extra perforations at axial end edge chambers of the guide roll for applying greater vacuum at the edge chambers than over the remainder of the roll.