Title:
【発明の名称】抄紙機用調整システム
Document Type and Number:
Japanese Patent JP2002504633
Kind Code:
A
Abstract:
A feedback-connected on-line regulation system for a headbox of a paper or board machine. The headbox includes a flow duct for stock suspension or separate flow ducts placed one above the other, each flow duct extending from an inlet header of the headbox into its slice channel. A stock suspension jet is discharged from the slice opening of the slice channel onto the forming wire or into the forming gap formed between forming wires. The regulation system includes a regulator unit and a set value unit. Measurement values are passed from the headbox system to the regulator unit and from the regulator unit, control values are obtained for controlling the actuators of the headbox system. The regulation system also includes an on-line If arrangement for measurement of the dried paper web or the paper web to be dried, and includes measurement of the distribution of fibers in the plane of the paper web. By means of the measurement signal obtained from this measurement arrangement, the actuators of the headbox are controlled by feedback so as to achieve a distribution of fiber orientation and a corresponding MD/CD ratio of strength in accordance with the set value in the paper web to be produced under control of the regulation system.
Inventors:
Luon Tama, Matty
Mustonen, Hari
Pakalinen, pecca
Mustonen, Hari
Pakalinen, pecca
Application Number:
JP2000532587A
Publication Date:
February 12, 2002
Filing Date:
February 17, 1999
Export Citation:
Assignee:
Metso Paper, Inc.
International Classes:
D21F1/02; D21F7/06; D21G9/00; (IPC1-7): D21F7/06
Attorney, Agent or Firm:
Takao Katori