Dampening system for printing presses, particularly offset print

Details Dampening system for printing presses, particularly offset print Dampening system for printing presses, particularly offset print

1977-12-02

1978-12-19

Fisher, J. Reed

Printing

Planographic

Dampeners

101352, B41L 2516

Patent

active

041300572

ABSTRACT:
A dampening system for a lithographic printing press which includes, in series, a driven fountain roller, an adjustable intermediate roller, a driven distributor roller, and an adjustable form roller, the latter engaging the printing plate, the intermediate and form rollers being mounted upon respective throw-off levers. A single actuator is used, connected to the form roller throw-off lever. The intermediate roller throw-off lever is effectively in the path of final movement of the form roller throw-off lever, for throw-off by the latter, so that upon subsequent restoration to working position a water path is completed progressively through all of the rollers starting with the fountain roller, and with the form roller touching the plate last, thereby to insure, regardless of the length of the period of throw-off, that the form roller will be wetted to proper degree, free of either flooding or starvation, before being applied to the plate. It is one of the features of the invention that the reaction force of the intermediate throw-off lever against the form roller throw-off lever, upon throw-off, acts through the center of rocking movement of the latter so that the actuator does not have to resist the reaction force. In the preferred form of the invention pressureless "kissing" contact is retained between the intermediate roller and the fountain roller and between the distributor roller and the form roller under the condition of throw-off to insure that the residual moisture on the surfaces of the latter does not contract into droplets.

REFERENCES:
patent: 3603254 (1971-09-01), Siebke
patent: 3688694 (1972-09-01), Preuss
patent: 3749011 (1973-07-01), Abendroth et al.
patent: 3757689 (1973-09-01), Koch et al.

Affiliated with

Also associated with

Rating

Dampening system for printing presses, particularly offset print does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dampening system for printing presses, particularly offset print, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dampening system for printing presses, particularly offset print will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2369478