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US 4,143,596 AGranted
Lithographic press dampening system
OwnerRobert W. Ivettinventor
Life of this patent
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Abstract
A dampening system for a lithographic press, comprised of a brush roller contacting a fountain roller immersed in a fluid. The brush roller is contacted by an elongate flicker bar transferring the fluid to a vibrator roller for application to a plate cylinder by a form roller. Drive means operate the fountain roller which is geared to the brush roller. The ratio of the gearing is such that the brush roller is driven at an overspeed condition relative to the fountain roller.
Claims7
In a lithographic press dampening system in which a fluid is transferred to a plate roller through a series of rollers, the improvement comprising:
- a fountain containing a dampening fluid;
- a fountain roller partially immersed in said fluid for picking up and transferring said fluid;
- a brush roller having bristles in a continuous contact with said fountain roller for transferring said fluid;
- an elongate flicker bar adjacent to said brush roller engaging and bending said bristles for deflecting the fluid from said brush roller to said series of rollers;
- first means for rotatably driving said fountain roller;
- and
- second means for driving said brush roller counter to and at an overspeed with respect to said fountain roller whereby the bristles of said brush have a slight wiping action against the fountain roller picking up a uniform volume of dampening fluid;
- whereby said fluid is transferred to said plate cylinder from said series of rollers.
5 more elements
Dependencies are inferred from the claim text.