EP 0906471 A1 19990407 - A METHOD AND BOARD MACHINE FOR MANUFACTURING A PAPERBOARD WEB
Title (en)
A METHOD AND BOARD MACHINE FOR MANUFACTURING A PAPERBOARD WEB
Title (de)
VERFAHREN UND PAPPEMASCHINE ZUR HERSTELLUNG EINER PAPPEBAHN
Title (fr)
PROCEDE ET MACHINE SERVANT A FABRIQUER UNE BANDE DE CARTON
Publication
Application
Priority
- SE 9700801 W 19970515
- SE 9602138 A 19960531
Abstract (en)
[origin: WO9745589A1] In order to meet higher demands for the properties of paperboard products an improved method and machine for the manufacture of paperboard are proposed according to the present invention in which a core (3) of a paperboard web is formed in a second forming unit (24) from a stock with a consistency of 1.5-6.0 % being supplied to the fourdrinier wire (6) of a fourdrinier former carrying a back layer (2) formed previously in a first forming unit (14), from a headbox (25) for high consistency stock and being dewatered upon being enclosed between the fourdrinier wire and a top wire (26) in said second forming unit, and in which an underliner (4) is formed in a third forming unit (34) of stock with a consistency of 0.3-1.4 % being supplied to the fourdrinier wire (6) carrying the back layer and core, from a headbox (35) for stock of low consistency. In both cases dewatering occurs under the influence of upper and lower tables (59, 60; 89, 90) in the loop of respective top wires (26; 36), said tables having slats (69, 74; 99, 104) separated by spaces (68, 75; 98, 105) and defining between them a passage through which a sandwich structure consisting of the fourdrinier wire (6), top wires (26; 36) and stock layer is conveyed and influenced alternatively by upper and lower slats so that the stock layer (3; 4) is compressed alternately from above and below, pressure pulses and shear forces thus being created in the stock layer. Furthermore, in the second forming unit for high consistency forming the stock layer (3) is kept in a fluidized state.
IPC 1-7
IPC 8 full level
D21F 1/48 (2006.01); D21F 9/00 (2006.01); D21F 11/04 (2006.01)
CPC (source: EP KR)
D21F 1/48 (2013.01 - EP); D21F 9/003 (2013.01 - EP); D21F 11/04 (2013.01 - EP KR)
Citation (search report)
See references of WO 9745589A1
Designated contracting state (EPC)
AT DE FR GB IT SE
DOCDB simple family (publication)
WO 9745589 A1 19971204; CA 2253831 A1 19971204; EP 0906471 A1 19990407; JP 2000511241 A 20000829; KR 20000010940 A 20000225; SE 506611 C2 19980119; SE 9602138 D0 19960531; SE 9602138 L 19971201
DOCDB simple family (application)
SE 9700801 W 19970515; CA 2253831 A 19970515; EP 97926311 A 19970515; JP 54214697 A 19970515; KR 19980709088 A 19981104; SE 9602138 A 19960531