Title:
METHOD FOR ACTING NEGATIVE PRESSURE ON FAN SHAPED PART OF SUCTION ROLL AND SUCTION ROLL
Document Type and Number:
Japanese Patent JPS61245394
Kind Code:
A
Abstract:
A method for applying a negative pressure over a sector of an air-pervious mantle of a roll includes providing a suction chamber within the pervious roll mantle which extends over a suction sector of the roll, directing air jets away from the suction chamber at the outermost edge portions of the suction chamber, the air jets causing air currents to be ejected from the suction chamber at the outermost edge zones thereof, the air currents thereby producing air seals at the outermost edge zones of the suction chamber without the use of contact-type sealing elements and at the same time, at least partly, providing a negative pressure in the suction chamber. A suction roll includes blow nozzles for directing air jets away from the suction chamber substantially parallel to the tangent of the roll mantle proximate to the blow nozzles. The inlet sides of the blow nozzles are connected to a pressure chamber situated within the roll mantle, the pressure chamber adapted to be connected to a pressure source.
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Inventors:
YUUKO AURA
REIMA KERUTSUURA
REIMA KERUTSUURA
Application Number:
JP8723486A
Publication Date:
October 31, 1986
Filing Date:
April 17, 1986
Export Citation:
Assignee:
VALMET OY
International Classes:
B65H5/22; B65H20/12; F16C13/00; B65H23/24; D21F1/00; D21F3/10; D21F5/04; (IPC1-7): D21F3/10; F16C13/00
Attorney, Agent or Firm:
Masao Okabe