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Patent Searching and Data


Title:
HEAD BOX OF PAPER MACHINE
Document Type and Number:
Japanese Patent JPH06146189
Kind Code:
A
Abstract:

PURPOSE: To provide a head box of a paper machine capable of producing highly homogenized paper in a wide range of production conditions by introducing a shear-force reducing fluid into the interface between a raw material feed duct wall and a slurry of fiber raw material, thereby enabling the control of an orientation of fiber.

CONSTITUTION: A tube 2 for supplying water or a high polymer soln. is arranged at an upstream of a distributing section 4. The tube 2 is connected with a supply pump 15 via a flow meter 17 and a valve 16, and a suction opening of the pump 15 is connected with a storage tank 18. When the supply pump 5 works, the shear-force reducing liquid is supplied by the pump 15 from the tube 2 to a neighborhood of the duct wall 1 in the section 4 and the shear-force at the surface of the wall 1 is reduced. Dispersibility of fiber is enhanced by this head box and paper of high homogeneity can be produced.


Inventors:
IWATA HIROSHI
YAMADA KENJI
EGUCHI AKIRA
KARAKAWA YUJI
Application Number:
JP31267192A
Publication Date:
May 27, 1994
Filing Date:
October 29, 1992
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
D21F1/02; (IPC1-7): D21F1/02
Attorney, Agent or Firm:
Takao Karaki