Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1987-08-20
1990-01-09
Hastings, Karen
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
162207, 162297, D21F 100
Patent
active
048926221
ABSTRACT:
A method of and arrangement for resisting formation of undulations in a fiber/water mixture supplied onto a forming wire at an open planar wire section of a paper-making machine include establishing over the wire an air curtain extending over the full breadth thereof, in the region of which the air mass upon the wire is set in motion. The direction of movement of the air mass is the same as the traveling direction of the wire, and the velocity of the air substantially equals the speed of the wire. The air curtain commences on the planar wire section, in the machine direction, only at a given distance from a lip slice of a headbox of the machine, and the air curtain extends along the traveling direction of the web over the planar wire section over a given distance.
REFERENCES:
patent: 1563095 (1925-11-01), Lewthwaite
patent: 1989435 (1935-01-01), Wallquist
patent: 2716927 (1955-09-01), Sullivan
patent: 3989085 (1976-11-01), Crosby
Eskelinen Pekka
Haverinen Timo
Jaatinen Paavo
Jokinen Juhani
Malkki Raimo
Hastings Karen
Kymmene Oy
Valmet Oy
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