Inner surface contoured press jacket by having cavities therein

Details Inner surface contoured press jacket by having cavities therein Inner surface contoured press jacket by having cavities therein

1994-01-21

1995-12-05

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162901, 428167, 428182, 428295, 428131, 428137, D21F 302

Patent

active

054725739

ABSTRACT:
A press jacket is formed of an elastomeric jacket material having two layers of reinforcement threads, namely an inner layer and an outer layer, embedded in it. The inner layer is formed of longitudinal threads which upon operation of the press device extend parallel to the axis of rotation of the press jacket. The outer layer is formed by a fabric layer or by circumferential threads which are wound helically and which, upon operation of the press device, extend approximately in the direction of travel of the press jacket. The reinforcement threads are surrounded by the layer of elastomeric material, which is produced homogeneously. The inner surface of the press jacket has longitudinal grooves which extend parallel to the longitudinal threads and have a depth of 0.1 to 0.2 mm. Various techniques of forming those grooves are described, including enlarging the longitudinal threads, pressing on the jacket which thereby deforms around the threads, forming voids or channels (i.e. cavities) in the jacket rather than having threads therein or having the press jacket material deform around the threads due to application of heat or pressure to the press jacket.

REFERENCES:
patent: 4287021 (1981-09-01), Justus et al.
patent: 4482430 (1984-11-01), Majaniemi
patent: 4484982 (1984-11-01), Majaniemi
patent: 4559106 (1985-12-01), Skytta et al.
patent: 4880501 (1989-11-01), Schiel
patent: 5118391 (1992-06-01), Matuschczyk et al.
patent: 5134010 (1992-07-01), Schiel

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