Presses – Automatic or material triggered control – Of roll separation or speed
Patent
1993-04-23
1994-09-06
Gerrity, Stephen F.
Presses
Automatic or material triggered control
Of roll separation or speed
100162B, 100163A, B30B 304, D21G 102
Patent
active
053438019
ABSTRACT:
A multi-roll calender for treating a web material, of the type which develops a linear force, has at least two rolls stacked one above the other in a press plane. A lower roll is constituted as a sag-compensation roll. The other rolls in the calender stack are all equidistant relative to the sag-compensation roll, i.e., they are supported the same distance away from the two supports of the rolls. One of the outermost rolls (either the top or the bottom roll) is fixed in a stand while all the other rolls are movably mounted. The moveable rolls can be acted upon by support forces acting in the plane of the stack. The support forces and the internal pressure of the sag-compensation roll are adjustable via a control device, e.g., a computer, so that even when the rolls sag, the linear force distribution of the rolls is identical over their width.
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patent: 4389932 (1983-06-01), Pav
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"Umgestaltung eines Zweiwalzenglattwerks Typ H in ein Vierwalzenglattwerk Typ H bei einer Papiermaschine"; Wald; Fachhochshule Rheinland-Pfalz; Aug. 31, 1990; pp. 88-106.
Gerrity Stephen F.
J.M. Voith & GmbH
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