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:
Sep. 18, 2001
Filed:
Mar. 12, 1999
Vesa Ijäs, Viiala, FI;
Valmet Corporation, Helsinki, FI;
Abstract
Method in calendering of a paper web in which the paper web is conveyed through a calendering nip formed by two calender rolls, at least one of which is a soft-faced roll having a coating of a resilient or polymeric material, or over which a belt of resilient or polymeric material is directed and passed through the nip. The profile of the calendering nip is controlled to compensate for defects in the web entering the calender. The profile control is accomplished by changing the diameter of the soft-faced roll zonewise by a profile control device arranged inside the body and performing temperature profiling. The profile control device include temperature control elements such as heating elements located in zones for heating a heat transfer medium such as air supplied into the body.