EP 0653515 A3 19960221 - Method in the drying of a paper web and a dryer section of a paper machine.
Title (en)
Method in the drying of a paper web and a dryer section of a paper machine.
Title (de)
Verfahren zur Trocknung einer Papierbahn und Trockenpartie einer Papiermaschine.
Title (fr)
Procédé pour le séchage d'une bande de papier et une section de séchage d'une machine à papier.
Publication
Application
Priority
FI 934367 A 19931005
Abstract (en)
[origin: EP0653515A2] Method and dryer section in contact-drying of a paper web (W). The paper web (W) is dried by means of heated smooth-faced drying cylinders (10, 20A,20B) by using a number of successive so-called normal groups (R1...RN) with single-wire draw, in which the drying cylinders (10) are placed in the upper row and the reversing suction cylinders (11) in the lower row. After the press section of the paper machine, the paper web (W) is dried initially in a number of successive groups (R1...RN) with single-wire draw by pressing the paper web (W) by means of the drying wire (15) of the cylinder group against the heated faces of the drying cylinders (10) and by, in each group (R1...RN) with single-wire draw, passing the paper web (W) on support of the same drying wire (15) from one drying cylinder (10) onto the other drying cylinder over reversing suction cylinders (11) or rolls. By means of the groups (R1...RN) with single-wire draw, the paper web (W) is dried to a dry solids content of k1 = 70...92 %. After the drying steps which were carried out exclusively by means of normal groups (R1...RN) with single-wire draw, the paper web (W) is dried immediately further by means of one single group (RTW) with twin-wire draw to its ultimate dry solids content. <IMAGE>
IPC 1-7
IPC 8 full level
D21F 5/04 (2006.01)
CPC (source: EP)
D21F 5/04 (2013.01)
Citation (search report)
- [PY] WO 9322497 A1 19931111 - BELOIT TECHNOLOGIES INC [US]
- [Y] DE 3828743 A1 19890323 - VALMET PAPER MACHINERY INC [FI]
- [E] DE 9414963 U1 19941103 - VOITH GMBH J M [DE]
- [A] EP 0332599 A2 19890913 - VALMET PAPER MACHINERY INC [FI]
- [A] US 4821429 A 19890418 - SIEBERTH RALF [US]
- [A] DE 9110134 U1 19910926
- [A] US 4967489 A 19901106 - AUTIO JUKKA [FI]
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0653515 A2 19950517; EP 0653515 A3 19960221; CA 2133604 A1 19950406; FI 934367 A0 19931005; FI 934367 A 19950406
DOCDB simple family (application)
EP 94850170 A 19941004; CA 2133604 A 19941004; FI 934367 A 19931005