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Patent Searching and Data


Title:
DRYER FOR PAPER MACHINE
Document Type and Number:
Japanese Patent JP3212494
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a dryer for paper machines capable of producing a sheet of paper improved in printability by forming vacuum rolls into crowned convex vacuum rolls having a convex diameter and uniformizing the shrinkage factor in the paper width direction of a wet web.
SOLUTION: This dryer for paper machines comprises vacuum rolls 3 formed into crowned vacuum rolls having a convex diameter so as to further preferably make the crowned vacuum rolls draw a curve of the formula [P is (1/2) the extent of the crown; L is the face length (the length in the shaft direction) of the vacuum rolls; Y is the distance from the crown working center line to a point P in the shaft direction; X is the crown height at the point P] when a wet web 1 is accompanied with a canvas, successively revolved and run through plural dryer rolls 2 having a heating means in the interior and the vacuum rolls 3 and dried. Furthermore, the crowned vacuum rolls are preferably installed within the range of a part with 30% moisture content to a dry end in a drying process for the wet web 1.


Inventors:
Kuno, Hiroaki
Sanada, Akira
Eguchi, Akira
Yamamoto, Mitsuo
Application Number:
JP1995000228937
Publication Date:
September 25, 2001
Filing Date:
September 06, 1995
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
D21F5/02; (IPC1-7): D21F5/02
Attorney, Agent or Firm:
藤田 考晴 (外3名)