Device for cleaning cylinder bearers on printing presses

摘要

A device for continuously cleaning a bearer in a printing press which includes a carrier in the form of a plate pivoted on the frame for the movement toward and away from the bearer. Mounted on the end portion of the carrier, and oriented in a generally axial direction, is a first scraper in the form of a doctor blade of stiff but wearable material and a second scraper in the form of a relatively soft, lubricated bar of felt, the carrier being biased for simultaneous contact of the scrapers against the bearer surface. The first scraper is oriented at a slight angle with respect to the bearer axis so that the material which is scraped from the bearer tends to be urged sideways for continuous discharge. The second scraper occupies a pocket in the carrier so that it may be rotationally indexed into a new position in the pocket as its presented edge becomes worn. A first stop interposed in the path of movement of the carrier prevents the carrier from scraping against the surface of the bearer as the scrapers are worn away. A second or latching stop is provided for latching the carrier in upraised position against the force of bias to facilitate cleaning the cylinder.