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. 14, 2003
Filed:
Feb. 28, 2001
Erik Brox, Forshaga, SE;
Metso Paper Karlstad AB, Karlstad, SE;
Abstract
In a roll nip ( ) formed between a shoe press roll ( ) having a concave, plane or slightly convex press shoe ( ), a flexible jacket ( ) and a hot counter roll ( ), the jacket ( ) may be damaged by the heat from the counter roll ( ) upon a web break. To avoid this, the roll nip ( ) is opened by removing one of the press shoe ( ) and the hot counter roll ( ) from the other, so that the jacket ( ) resumes a generally cylindrical shape having an arched portion located across the shoe ( ). Then, a force is applied inside the roll jacket ( ), directed away from the roll nip ( ), to tension the roll jacket ( ) over the leading edge and the trailing edge of the press shoe ( ), so as to reduce the height of arch of the arched portion over the shoe ( ) sufficiently to ensure removal of the jacket ( ) from contact with the hot counter roll ( ). Preferably, the force against the inside of the jacket is applied by means of a tensioning shoe ( ). Suitably, the tensioning shoe is operated by a linear actuator ( ), e.g. a fluid force actuator, carried by a support beam ( ) that extends axially through the flexible jacket ( ).