Spiral-type ductor

Details Spiral-type ductor Spiral-type ductor

1982-11-03

1984-08-28

Fisher, J. Reed

Printing

Inkers

Roller

101DIG6, B41F 3114, B41L 2728, B41L 2716

Patent

active

044677200

ABSTRACT:
Each individual, freely rotatable ring of a spiral-type ductor is mounted on an eccentric which is supported for rotation on a multi-eccentric shaft is angularly offset relative to its adjacent eccentric portion by at least an amount corresponding to the number of rings. The multi-eccentric shaft is connected to the drive of an inking system directly while the eccentric is connected thereto through a pinion, a pinion shaft, a gear and a separate sequential transmission with an integral speed ratio. In consequence, the center of the ring describes a curve which is flattened in the zone where the ring is in contact with an inking roller. The contact duration is thereby extended without varying the speed.

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