Patent · US Expired

Method in drying of paper

US6742280B1 · kind B1 · utility

2Cited by

7References

35Claims

0Family size

Assignee

Andritz Technology and Asset Management GmbH · AT

Inventors

Anders Andren · Enköping, SE
Stefan Backa · Visby, SE
Johan Ekh · Visby, SE
Xiaolong Feng · Visby, SE
Thomas Liljenberg · Hagfors, SE
Ulf Persson · Uppsala, SE
Xiaojing Zhang · Austin, US

Key dates

Filing date	Sep 13, 2002
Grant date	Jun 1, 2004
Priority date	—
Expiry date	Sep 13, 2022

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21F5/185
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method in consolidation and drying of paper. A wet web is contacted with superheated steam, whose temperature is 200-600° C. for the purpose of reducing, by heat transfer from the superheated stream, the water content of the web by evaporation of a substantial part of the water in the same. The wet web is supported and transported by means of a heat-conductive, gas-impermeable belt whose width is equal to or exceeds the width of the web, and jets of the superheated steam are directed towards the side of the web facing away from the belt.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.