GB734803A - Device for setting and controlling the inking and damping rollers of printing machines - Google Patents

Abstract

734,803. Printing-machines. MASCHINENFABRIK AUGSBURG-NURNBERG AKT.- GES. March 9, 1953 [April 9, 1952], No. 6501/53. Class 100 (2). In an inking or damping apparatus a forme roller 3 is mounted at each end on hinged members 8, 10 adjusted by a pair of coaxial eccentrics 15, 17.secured to independent coaxial adjusting shafts 16, 26, one of which sets the roller relative to the ink drum, or to the corresponding roller in the damping mechanism (setting a) while the other sets it relative to the plate cylinder (setting b). As shown the member 8 is a forked bearing arm pivoted on a pin 9 for movement of the roller perpendicularly to the plane of the paper (setting a); the member 10 from which the pin 9 projects is a rocker plate pivoted on a fixed pin 11 for movement of the roller approximately in the plane of the paper (setting b). The eccentric 15 carries an antifriction bearing 14 located in a longitudinal cut 13 in the arm 8; setting a is carried out by a key applied to the square, hexagon, &c., outer end of the shaft 16. A spring-loaded plunger 19 presses the roller towards the plate cylinder (not shown), the movement being limited by contact of an arm 18 on the plate 10 with the eccentric 17 rotated for setting b by a handwheel 34 on a shaft 33 geared at 32, 31 to the shaft 26; a stop pin 23 on the eccentric works in a slot in a fixed plate 25. The shafts pass in an oil-tight manner through the frame 12 and the cover 29 of the gearbox 27 containing the driving gears (not shown) for the rollers and cylinder, and their centre lies at the intersection of two planes, one containing the centres of the plate cylinder and the pin 9 and the other containing the centres of the ink drum or corresponding damping roller and the pin 11. Conical sheet metal discs 36, 37 pressed by bushes 40, 41 form brakes to hold the shafts 26, 16 in their set positions. The amount of " jump " as the roller 3 enters and leaves the gaps in the plate cylinder is indicated by a rod 42 within the shaft 16, which is pressed against an inclined surface 48 of a disc 49 fixed to the arm 8; the spring 44 beds on a ring 45 held in the hollow shaft 16 by screws 46, 47. A stirrup 51 is provided to lift all the forme rollers clear of the plate cylinder, against their spring plungers 19, when required.