Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1977-03-23
1978-09-26
Hoag, W.E.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
72248, 100 35, 100 47, 100168, 264 405, 264175, 425172, 425363, 425367, B29C 1500, B29D 902, B29D 714
Patent
active
041170547
ABSTRACT:
The method maintains a set nip clearance at a uniform value across the widths of the calendar, at different calendar loads, in at least the last nip, in the working direction, of a calender stack or the like including at least three rolls subjected to a common work-press load, with at least one roll being crowned to correspond to the maximum load of the calendar and at least one roll being adjustable. The thickness of the material being treated is sensed at one or several points in a direction transverse to the material web, or the deflection, or the load, is sensed at one or several of the rolls. The position of one or more adjustable rolls is displaced, relative to the common plane through the roll axes, in accordance with the sensing in a manner such that the axis of the adjustable roll or rolls remains parallel to the adjacent roll axis. The adjustable rolls may be displaced horizontally either linearly or arcuately to follow the contour of the adjacent rolls. The adjustment may be effected automatically responsive to measurements and to calculations performed by a computer.
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patent: 2424856 (1947-07-01), Schnuck
patent: 3060843 (1962-10-01), Moore et al.
patent: 3084314 (1963-04-01), Ziffer
patent: 3264682 (1966-08-01), Freeman
patent: 3273199 (1966-09-01), Kleinewefers
patent: 3274308 (1966-09-01), Freeman et al.
patent: 3499957 (1970-03-01), Ancker
patent: 3527638 (1970-09-01), Sonnichsen
patent: 3599288 (1971-08-01), Eakman
patent: 3936258 (1976-02-01), Lake
patent: 4014636 (1977-03-01), Pawelczyk
patent: 4038012 (1977-07-01), Sander
Hoag W.E.
Oy Wiik & Hoglund Ab
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