EP 0974799 A3 20011205 - Process for drying fibrous webs
Title (en)
Process for drying fibrous webs
Title (de)
Verfahren zur Trocknung von Faserstoffbahnen
Title (fr)
Procédé de séchage de bandes fibreuses
Publication
Application
Priority
DE 19827843 A 19980623
Abstract (en)
[origin: DE19827843A1] To dry a wet fiber web (1), especially of paper or cardboard or tissue, it is heated, and the drying action is set across the web at least in sections at least during one phase of the heating process. The drying effect is varied at the center of the web (1), in relation to the edges, so that the blowing and/or heating is stronger at the center while the edges are moistened. The changing effects on the heating action are decreased towards the end of the drying process, across the web (1) width. The heating effect action is stronger and/or the strongest at the start of the heating program, and after the contained water has started to evaporate. The level of the heating effect is set by the difference between the shrinkage of the web (1) at the heating point and the shrinkage at the end of the drying process. An Independent claim is included for an appts. where the web (1) is subjected to blowing and/or moistening and/or heating at a different intensity at least in sections, across the web (1) width.
IPC 1-7
IPC 8 full level
D21F 5/02 (2006.01); D21F 5/04 (2006.01); D21G 7/00 (2006.01); F26B 13/00 (2006.01)
CPC (source: EP)
D21F 5/021 (2013.01); D21F 5/042 (2013.01); D21G 7/00 (2013.01); F26B 13/008 (2013.01)
Citation (search report)
- [XY] DE 1610921 A1 19710408 - CONTINENTAL GUMMI WERKE AG
- [XAY] DE 1206718 B 19651209 - BELOIT IRON WORKS
- [Y] US 5557860 A 19960924 - KOTITSCHKE GERHARD [DE], et al
- [Y] EP 0708301 A1 19960424 - GASTEC NV [NL]
- [X] EP 0808942 A2 19971126 - JAMES RIVER CORP [US]
- [X] DE 19533673 A1 19970320 - TECH UNI CHEMNITZ ZWICKAU I FU [DE]
- [A] US 3793741 A 19740226 - SMITH H
- [A] EP 0489720 A2 19920610 - KRIEGER CORP [US]
- [A] DE 4313543 C1 19940407 - VITS MASCHINENBAU GMBH [DE]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19827843 A1 19991230; EP 0974799 A2 20000126; EP 0974799 A3 20011205
DOCDB simple family (application)
DE 19827843 A 19980623; EP 99105158 A 19990329