GB986461A - Improvements in or relating to printing presses - Google Patents

Abstract

986,461. Printing machines. VICTORYKIDDER PRINTING MACHINE CO. Ltd. June 17, 1963 [Aug. 24, 1962], No. 23997/63. Heading B6C. Roller lifting and adjusting.-The plate cylinder 30 of a relief printing-machine or the offset cylinder of an offset machine is carried at one end of a pedestal 25 which is pivoted at its other end 27 and beyond the inking roller 21 for movement of the plate cylinder into and away from contact with the impression and inking rollers 35, 21, or the movement of the offset cylinder into and out of contact with the plate and impression cylinders. The cylinder 30 can be moved from above or below into contact with its co-operating cylinders, and a number of cylinders so mounted can cooperate with a single impression cylinder for mult-colour printing. The arrangement can be applied to " all size " machines designed to take printing cylinders of differing diameters. As applied to a relief printing-machine, the pedestal 25 comprising two side members is pivoted at 27 to a base member 45 which also carries the inking devices 21, 22, and which is adjustable by a screw spindle 50 and fixing bolts 47 along a track 42. To move the pedestal, hydraulic or air cylinders 65, Fig. 6, one at each side of the machine, are pivoted to the base member 45 and their piston-rods 70 are threaded into pins 72 rotatable in tubular parts 73 fixed to the plate-cylinder shaft bearings 75. Fine adjustment of the limits of the pedestal movement is effected by means of an eccentric sleeve 82 circumferentially adjustable in the pedestal 25 and carrying two radial screws 85, 86, Figs. 7, 8 (not shown), which can abut against a pin 90 fixed to the base member 45. Axial adjustment of the plate cylinder can be carried out by means of a knob 106 fixed to a screwed spindle 100 mounted for rotary but not axial movement in one side of the pedestal 25. The spindle 100 carries a threaded sleeve 101 fixed to a bearing 102 of the platecylinder shaft 110 so that rotation of the knob 106 causes axial movement of the shaft 110 and cylinder 30. Circumferential adjustment is effected by means of a sleeve 128 rigid with the outer part 130 of a plate-cylinder shaft bearing and movable axially by means of gearing 115, 118, 120, 122, 125 and a knob 117. Fixed to the inner part of the bearing is a bushing 131 rigid with an outer sleeve 132. The sleeve 132 carries an helical gear 135 meshing with a helical main gear drive 141, and the bushing 131 is splined at 134 to an inner sleeve 133 fixed to the shaft 110. Rotation of the knob 117 causes axial movement of the gear 135 and thus by the engagement of the gears 135, 141, effects circumferential adjustment of the plate cylinder relative to its driving gear 141, which adjustment can be carried out during operation of the machine. Inking apparatus.-For simultaneous adjustment of the inking rollers 21, 22 relative to the plate cylinder, they are mounted on a member 55, Fig. 5, movable along the base 45 by means of a screwed spindle 56. The roller 22 can also be adjusted relative to the roller 21 by means of a screwed spindle 60.