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. 15, 1998
Filed:
Jun. 13, 1997
Oiva Vallius, Jyvaskyla, FI;
Valmet Corporation, Helsinki, FI;
Abstract
A press section of a paper machine through which a paper web has a substantially closed and supported draw including an extended-nip zone and an equalizing-nip zone following the extended-nip zone in the running direction of the web. In the equalizing-nip zone, the asymmetry of roughness is equalized that was formed in the web to be pressed in the preceding press nip or nips, while not dewatering the web to a substantial extent. The extended-nip zone and the equalizing-nip zone are formed between three press components which are interconnected in a compact way so that the extended nip is formed by a press component provided with a flexible mantle together with a press roll provided with a rigid mantle. The press roll with the rigid mantle also forms the equalizing-nip zone together with a smooth-faced equalizing-press roll. After the equalizing-nip zone, the web has at least one free draw or runs on a transfer fabric, on which draw(s) or run, by a difference in speed, the stretch of the web in the machine direction, taking place in the equalizing-press nip is compensated for and the web is kept appropriately tensioned.