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:
Nov. 20, 2001
Filed:
Nov. 17, 1998
Taisto Huhtelin, Tampere, FI;
Risto Kuusisto, Tampere, FI;
Lin Tian, Tampere, FI;
Timo Rantala, Tampere, FI;
Jukka Nokelainen, Kajaani, FI;
Metso Paper Automation Oy, Tampere, FI;
Abstract
The invention relates to a method and equipment for controlling properties of paper, which method comprises modelling the effect of the flow of retention agent (F,) both on the amount of filler in the white water and on the paper ash content (ASH), and the effect of the flow of filler (F,) both on the paper ash content (ASH) and on the amount of filler in the white water. The fulfilled modelling is used to adjust the amount of filler in the white water and the paper ash content (ASH) by controlling simultaneously the flow of retention agent (F,) and the flow of filler (F,).