Belt for a papermaking machine

Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...

Reexamination Certificate

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Details

C162S901000, C428S147000, C428S307300, C428S909000, C442S101000, C442S121000, C442S148000, C442S164000

Reexamination Certificate

active

07128811

ABSTRACT:
A belt for a papermaking machine has minute projections and recesses randomly formed in a shoe-contacting surface of the belt by a powdery material contained in a high molecular weight elastic section formed on a base body. The surface roughness RZ of the shoe-contacting surface is between 50 and 500 microns; the particle diameter of the powdery material is between 5 and 500 microns; and the content of the powdery material in the high molecular weight elastic section is between 5 and 50 percent by weight. A lubricant is held in the minute projections and recesses, and consequently more lubricant may be supplied between the belt and the shoe with which it cooperates. As a result, friction between the belt and the shoe is reduced, and less energy is required to drive the papermaking machine.

REFERENCES:
patent: 4482430 (1984-11-01), Majaniemi
patent: 5298124 (1994-03-01), Eklund et al.
patent: 5965208 (1999-10-01), Fagerholm et al.
patent: 6036819 (2000-03-01), Miller et al.
patent: 6325897 (2001-12-01), Ishino et al.
patent: 6530854 (2003-03-01), Sakuma et al.
patent: 6547924 (2003-04-01), Klerelid et al.
patent: 6616814 (2003-09-01), Best
patent: 2005/0224318 (2005-10-01), Hikida
patent: 6-81291 (1994-03-01), None

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