GB913564A - Inking mechanism for printing presses - Google Patents

Abstract

913,564. Inking-apparatus. WORTHINGTON, E. W. Aug. 19, 1960 [Oct. 9, 1959], No. 28882/60. Class 100 (2). Inking-apparatus comprises a first roller to carry a film of ink from an ink source, a second roller to receive ink from the first roller and pass it to a third roller, and mounting means for the second roller including eccentric biasing surfaces, whereby the axis is oscillated with respect to the axis of the other two rollers. A driven fountain roller 12, Fig. 2, rotates in a fountain 10, and the drive shaft 55 rotates through gearing a ductor roller 15 comprising hollow sections 25, 26 eccentrically mounted on a central shaft comprising parts 31, 32 and rotating in fixed parts 36, 38, 41 of the fountain. The eccentricity of the sections 25, 26 is 180 degrees outof phase. In this way the periphery of the roller 15 moves into and out of contact with the ink film on the roller 12 and into greater and lesser pressure contact with the rubber surface of the third or transfer roller. In another form, Fig. 4, the central shaft 74 of the ductor roller 60 is not rotated continuously, but is oscillated by means of a lever 77 actuated by a cam 79 on the fountain roller shaft. In another form, Figs. 7 and 8, the ductor roller 93 comprises two sections 96, 97 independently and eccentrically mounted on stub shafts 103, 104 and rotated by the transfer roller, the relative phases of eccentricity of the sections varying because of slip. To prevent excessive vibration, counterweights 106 are secured to parts of the roller nearest the axis of the stub shafts, or alternatively holes 110 are provided in parts furthest from the axis. The stub shafts are also eccentric with respect to their biasing elements 99, 100, and by rotating the latter the position of the roller 93 with respect to the fountain and transfer rollers is adjustable. The bearing elements are adjusted by two screws 107, Fig. 8, engaging seats 108 of the elements.