Printing – Rolling contact machines – Rotary
Patent
1983-10-31
1985-07-09
Crowder, Clifford D.
Printing
Rolling contact machines
Rotary
101226, 101426, 83170, B41F 3300
Patent
active
045274738
ABSTRACT:
A method and apparatus for setting the positioning between a first rotating member and a second fixed or rotating member in a rotary machine comprises controlled thermal elements positioned on the frame supporting the members and/or on the rotating member(s) itself to counteract the effects of centrifugal force on the rotating member(s) to thereby approximately maintain the setting between the members. In one embodiment, the temperature of the frame controlled by the thermal elements may be maintained in proportion to the speed of rotation of the rotary member(s) to maintain the setting of the rotary machine throughout its operating speed range. In another embodiment, the initial setting between the first and second members may be precisely set by the controlled thermal elements at or near the setting representing the minimum useful loading, and due to the effect of centrifugal force be allowed to diminish to within the range of useful operating pressure or clearance. In another embodiment, a predetermined initial setting between the first and second members is substantially maintained by monitoring the effects of centrifugal growth on the apparatus and adjusting the temperature of the frame supporting the first and second members to push the members apart to compensate for centrifugal growth.
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