Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Patent
1991-05-21
1992-10-13
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
162200, 162273, 162274, 1623602, D21F 304
Patent
active
051547996
ABSTRACT:
Method and device in a compact press section of a paper machine for replacement of press rolls and fabrics. Above the compact combination of press rolls, there is an open space between the front frame and the rear frame of the press section. By means of this space, the press rolls and the upper fabrics can be replaced by raising and lowering, e.g. by means of a crane mounted on the ceiling. The press roll that forms the second press nip in the press section together with the center roll is supported on an opening and loading mechanism to which hydraulic cylinders are connected, by means of which cylinders both the second nip is loaded with a suitable linear load and the mechanism is pivoted to the open position or positions. The movements of lateral parts of the mechanism are synchronized with each other by means of a connecting part fitted between them.
REFERENCES:
patent: 4608125 (1986-08-01), Autio
patent: 4657634 (1987-04-01), Autio
patent: 4919762 (1990-04-01), Laapotti et al.
patent: 5049239 (1991-09-01), Autio
Hastings Karen M.
Valmet Paper Machinery Inc.
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