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. 11, 2005
Filed:
Sep. 22, 2000
Helena Leppäkoski, Lempäälä, FI;
Pekka Koivukunnas, Järvenpää, FI;
Kari Hasanen, Kerava, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
The present invention relates to a method and assembly for opening the nips () of a calendar comprising at least two elements () brought to a nip contact with each other, especially for performing the nip opening at a break or damage occurring in the web () being calendered. The tension of the web () being calendered is measured at multiple points over the cross-machine width of the web () and the calender nips () are opened when the measured web tension at a preset number of points over the cross-machine width of the web () has fallen to a limit value that by a decision-making algorithm monitoring the tension profile of the web () is interpreted to indicate a web break situation or other damage on the web () requiring opening the nips ().