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. 15, 2015
Filed:
Feb. 21, 2013
Jani Hakola, Nummenkylä, FI;
Lauri Aaltio, Järvenpää, FI;
Mika Viljanmaa, Helsinki, FI;
Pekka Linnonmaa, Helsinki, FI;
Laura Savela, Helsinki, FI;
Arto Kumpulainen, Kellokoski, FI;
Petri Ristola, Kerava, FI;
Jani Hakola, Nummenkylä, FI;
Lauri Aaltio, Järvenpää, FI;
Mika Viljanmaa, Helsinki, FI;
Pekka Linnonmaa, Helsinki, FI;
Laura Savela, Helsinki, FI;
Arto Kumpulainen, Kellokoski, FI;
Petri Ristola, Kerava, FI;
Valmet Technologies, Inc., Espoo, FI;
Abstract
A method for modernizing a existing multiroll calender, having at least one stack of calender rolls (), each stack comprising at least two calender rolls () and at least one of the calender rolls being a smooth-surfaced press-roll (). In an existing multiroll calender the smooth-surfaced press roll () is replaced by an ultra thermo roll that is a thermo roll with a diameter substantially the same or less than the thermo roll to be replaced, so that the surface temperature of the ultra thermo roll when heated is at least 110° C., and has at least 10° C. higher than the surface temperature of the existing roll with the same heating fluid temperature and having flow channels arranged in such a way that vibration excitation is minimized, by being arranged to form a spiral geometry in the mantle.