Dampening apparatus of lithographic printing machine

Details Dampening apparatus of lithographic printing machine Dampening apparatus of lithographic printing machine

1995-04-24

1997-01-21

Burr, Edgar S.

Printing

Planographic

Dampeners

101148, B41L 2300

Patent

active

055951163

ABSTRACT:
A dampening apparatus of a lithographic printing machine in which a dampening train constituted by a roller or rollers is arranged and a dampening liquid is supplied to a printing plate through the dampening train, comprises a spraying mechanism facing a peripheral surface of a roller of the dampening train with a space therefrom and disposed along an axis of the roller, the spraying mechanism containing a plurality of nozzles directing to the peripheral surface of the roller, a cover unit disposed in the space between the spraying mechanism and the roller and having a roller side cover opened and a spraying mechanism side cover closed, the cover unit having a structure extendable and retractable between the roller side cover and the spraying mechanism side cover, and movement adjusting means for adjusting relative movement of the roller side cover and the spraying mechanism side cover so as the spraying mechanism side portion of the cover unit and the spraying mechanism may move close to or apart from the peripheral surface of the roller, the movement adjusting means is connected with the spraying mechanism and the spraying mechanism side cover. A mechanism for positioning the roller side of the cover unit with respect to the peripheral surface of the roller is further disposed.

REFERENCES:
patent: 4050378 (1977-09-01), Smith
patent: 4708058 (1987-11-01), Smith
patent: 4848228 (1989-07-01), Svoboda et al.
patent: 5025722 (1991-06-01), Switall et al.
patent: 5040457 (1991-08-01), Lin
patent: 5438923 (1995-08-01), Schoeps

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