EP 0939842 A1 19990908 - A MULTILAYER HEADBOX FOR A PAPERMAKING MACHINE
Title (en)
A MULTILAYER HEADBOX FOR A PAPERMAKING MACHINE
Title (de)
MEHRSCHICHTENSTOFFAUFLAUF FÜR EINE PAPIERMASCHINE
Title (fr)
CAISSE DE TETE MULTICOUCHE DESTINEE A UNE MACHINE DE FABRICATION DE PAPIER
Publication
Application
Priority
- SE 9700921 W 19970529
- SE 9602347 A 19960612
Abstract (en)
[origin: WO9747804A1] A multilayer headbox for a papermaking machine which comprises a slice chamber having an upstream inlet and a downstream outlet. A tube bank comprising a plurality of straight tubes is located upstream of the slice chamber. In the slice chamber, at least one machine-wide separator vane is subdividing the slice chamber for the production of multilayered fibrous webs. The separator vane may be a tapered glass fiber reinforced epoxy resin vane or composed of an upstream steel section of constant thickness and a downstream tapered section of glass fiber reinforced epoxy resin. The separator vane has a stiffness, which for at least 70 % of its length is higher than the stiffness of a 1 mm thick reference sheet of a material having a modulus of elasticity of 2100 MPa. In the slice chamber, there is also a plurality of machine-wide turbulence generating elements.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21F 1/02 (2013.01); D21F 1/028 (2013.01); D21F 9/006 (2013.01)
Citation (search report)
See references of WO 9747804A1
Designated contracting state (EPC)
AT DE FI FR GB IT SE
DOCDB simple family (publication)
WO 9747804 A1 19971218; AT E223534 T1 20020915; DE 69715236 D1 20021010; DE 69715236 T2 20030522; DE 69715236 T3 20061214; EP 0939842 A1 19990908; EP 0939842 B1 20020904; EP 0939842 B2 20060628; JP 3194967 B2 20010806; JP H11514050 A 19991130; SE 506931 C2 19980302; SE 9602347 D0 19960612; SE 9602347 L 19971213
DOCDB simple family (application)
SE 9700921 W 19970529; AT 97927534 T 19970529; DE 69715236 T 19970529; EP 97927534 A 19970529; JP 50150598 A 19970529; SE 9602347 A 19960612