Dampening apparatus for printing press

Details Dampening apparatus for printing press Dampening apparatus for printing press

B - Operations, Transporting

41

F

101/60

B41F 7/40 (2006.01) B41F 31/30 (2006.01)

Patent

CA 1278458

ABSTRACT OF THE DISCLOSURE A dampening liquid application apparatus for a lithographic press includes a motor driven metering roller drivably engaged with a transfer roller which in turn is engageable with an applicator roller for transferring dampening liquid to a plate cylinder. The metering and transfer rollers are driven through a gear train and are mounted on support members which permit pivotal movement of the support members such that the transfer roller may be disengaged from the applicator roller and, through a lost motion coupling, the applicator roller may be disengaged from the plate cylinder. The applicator roller is driven independently through a gear train meshed with a drive gear on the plate cylinder. Support bearings for the metering and transfer rollers and the support members for the applicator roller are adjustable by stop members so that engagement forces between the respective rollers may be selectively adjusted. Spaced apart support brackets may be mounted on the press frame for supporting a distribution roller engageable with the dampener applicator roller and one of the form rollers of the press inking train. A manually actuated cam and shaft assembly locks the support members for the metering and transfer rollers in a retracted position disengaged from the applicator roller. The support members for the metering and transfer rollers are connected to the support members for the applicator roller by a lost motion coupling wherein the transfer and applicator rollers disengage from each other and the applicator roller disengages from the plate cylinder in an inoperative position of the dampening apparatus.

520776

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