Groove configuration for a press belt in an extended nip press

Details Groove configuration for a press belt in an extended nip press Groove configuration for a press belt in an extended nip press

1994-10-18

1996-08-06

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162901, 198847, 428179, 428182, D21F 302

Patent

active

055430155

ABSTRACT:
The grooves of a grooved press belt are formed with an improved configuration which reduces groove closure under pressure and which reduces cracking and tearing of the belt. The improved groove configuration consists of a curved bottom and two upwardly diverging side walls. In a first embodiment the bottom wall is semi-circular and has a diameter which is equal to about one half of the width of the groove opening. The upwardly diverging side walls preferably include radiused upper edges. The side walls preferably have an angle of divergence between about five degrees and about fifteen degrees from a vertical plane. In a second embodiment, the bottom of the groove is substantially flat, and the bottom corners are radiused to provide a smooth transition between the flat bottom and the upwardly diverging side walls.

REFERENCES:
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patent: 3537571 (1970-11-01), Wiese
patent: 3630340 (1971-12-01), Bouzat
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patent: 4482430 (1984-11-01), Majaniemi
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patent: 4880501 (1989-11-01), Schiel
patent: 4908103 (1990-03-01), Cronin et al.
patent: 4946731 (1990-08-01), Dutt
patent: 5141101 (1992-08-01), Vance
patent: 5302251 (1994-04-01), Schiel et al.

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