Title:
【発明の名称】製紙機械のための多層ヘッドボックス
Document Type and Number:
Japanese Patent JP3194967
Kind Code:
B2
Abstract:
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.
Inventors:
Haral Dosson En Wolf
Linden Anderste
Clererid Ingval Bee
Ternefalk Louis M
Linden Anderste
Clererid Ingval Bee
Ternefalk Louis M
Application Number:
JP50150598A
Publication Date:
August 06, 2001
Filing Date:
May 29, 1997
Export Citation:
Assignee:
Valmet Karlstad Activolag
International Classes:
D21F1/02; D21F9/00; (IPC1-7): D21F1/02
Domestic Patent References:
| JP6146597B2 | ||||
| JP6511051A | ||||
| JP9502773A | ||||
| JP11511819A |
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)