Spiral fabric papermakers felt formed from non-circular cross se

Details Spiral fabric papermakers felt formed from non-circular cross se Spiral fabric papermakers felt formed from non-circular cross se

1982-09-24

1984-11-06

Smith, William

Paper making and fiber liberation

Apparatus

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

162DIG1, 28141, 139383A, 428222, 428224, 428397, D21F 110, D04H 302

Patent

active

044810792

ABSTRACT:
A dryer felt comprising a plurality of spiral coils disposed in a common plane and arranged in a side-by-side relationship with adjacent coils being intermeshed and joined together in a hinged relationship by a hinge yarn. During manufacture, the fabric is subjected to a heat treatment under controlled tension to cause the spiral coils, which are normally circular, or elliptical in cross-section to assume the shape of the hinge yarns which are typically of rectangular, elliptical, D-shape, dog bone or two or more circular cross section yarns with the long side of the stuffer yarn lying in the plane of the fabric. In this way, the air voids within the fabric are substantially filled by the hinge yarns to reduce permeability, while the flattened spiral coils provide smooth paper-receiving and machine roll contacting surfaces on the resultant dryer felt. The coils are formed from yarns having a non-circular cross section and with their respective longer axes oriented in a direction generally parallel to the upper and lower surfaces of the felt.

REFERENCES:
patent: 1263564 (1918-04-01), Kida
patent: 1794624 (1931-03-01), Kastner
patent: 2199529 (1940-05-01), Shackelford
patent: 3436041 (1969-01-01), Haller
patent: 3562079 (1971-02-01), Steel
patent: 3851681 (1974-12-01), Egan
patent: 4076627 (1978-02-01), Friedrichs
patent: 4142557 (1979-03-01), Kositzke
patent: 4345730 (1982-08-01), Leuvelink
patent: 4346138 (1982-08-01), Lefferts
patent: 4395308 (1983-07-01), Dawes

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