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:
Mar. 22, 2005
Filed:
Apr. 17, 2001
Applicants:
Matti Lares, Helsinki, FI;
Mikko Tani, Appleton, WI (US);
Inventors:
Matti Lares, Helsinki, FI;
Mikko Tani, Appleton, WI (US);
Assignee:
Metso Paper, Inc., Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21G001/02 ; D21F011/00 ;
U.S. Cl.
CPC ...
Abstract
A long nip (N) shoe calender formed of a shoe roll () and a thermo roll () is used in calendering, with a nip dwell time which is over 10 ms, advantageously over 20 ms. The nip pressure is below 3 MPa, advantageously below 1 MPa, and a surface temperature of the thermo roll () is over 200° C., advantageously over 250° C. The board web (W) surface to be pressed against the thermo roll () is moisturized before the nip.