Abstract: Apparatus for affecting positional adjustment of a machine member has an adjustment screw nonrotatably connected to the machine member and screwed into a nut formed as a worm wheel. The worm wheel, meshes with a worm, connected by a worm shaft to an actuator assembly for rotating the worm. The worm shaft is rotatably and axially displaceably mounted in a housing in which the worm wheel is rotatably mounted and the worm shaft is rotatably and axially non-displaceably mounted in a slider, which is guided in the housing for movement in the axial direction of the worm shaft. The slider is reciprocable by a fluid-operable piston-cylinder unit to an extent which corresponds to the desired adjustment of the screw.

Abstract: A planographic printing master comprising an ink releasing photoconductive insulating layer and an ink receptive particulate image pattern.

Abstract: A machine particularly adapted for printing card stock. A head or carriage is mounted to reciprocate over a type bed. The carriage mounts the impression roller, inking rollers, doctor roller and an oscillating roller. The impression roller is mounted on an adjustable eccentric shaft adjustable to compensate for different thicknesses of card stock to thereby control the printing pressure. The impression roller is driven through roller members that move on rails which are coupled by way of a positive clutch to the ends of the impression roller which is positively driven in any adjusted position. The inking rollers, oscillating and doctor roller are mounted between side plates of the carriage, improved means being provided for lifting the inking rollers and for lifting the oscillating roller and doctor roller.