Paper making and fiber liberation – Processes and products – With cutting and/or slitting
Patent
1994-06-10
1996-04-16
Lacey, David L.
Paper making and fiber liberation
Processes and products
With cutting and/or slitting
162194, 162205, 162210, 162252, 1623583, D21F 302, D21F 306, B30B 300
Patent
active
055079164
ABSTRACT:
A method of treating the edges of a fiber web is provided wherein a pressing device device conveys and presses a fiber web through a pressing gap of a pressing station of the device. The station includes a pressing roll and a counter roll. The pressing roll has a roll shell. A pressing shoe is disposed within the roll shell and pressing units are disposed substantially along a width of the pressing shoe transverse to the direction of movement of a fiber web through the pressing station. The pressing units press against the pressing shoe which in turn presses a pressing surface of the shoe against an inner surface of the roll shell in a series of zones. The pressing units including pressing/pressure relief elements. The pressing force of the pressing/pressure relief elements is reduced in a step-wise fashion, zone-by-zone, from a normal operating level to a lower level in a region that includes the fiber web edges and the pressing shoe ends.
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Fortuna Jos'e A.
J.M. Voith & GmbH
Lacey David L.
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