GB170023A - Improvements relating to printing machines more especially applicable for intaglio printing - Google Patents

Abstract

170,023. Pictorial Machinery, Ltd., Corkett, F. T., and Smith, J. H. W. April 9, 1920. Intaglio-plate printing; rotary machines; inking- apparatus; starting, stopping, tripping, throw-out, and like arrangements.- Rotary printing-machines, more especially for intaglio printing, are so constructed that the means for assembling or dis-mantling the printing couples and the associated inking, feeding, and like mechanisms are controlled by the movements of 'the ink fountain into and out of position for printing. An intaglio printing machine with a printing- 'cylinder j and impression cylinder k is supplied with ink from a fountain e. which is carried by nuts e<2> engaged by a pair of threaded spindles d. These are geared by bevel-gearing to a shaft c rotated by worm and bevel gearing from a shaft a where a double-acting clutch, controlled from a hand-lever f, is operated to move the clutch to operative position. The clutch lever c<6> is operated by adjustably-mounted studs f<4> on arms f<2>, f<3> of the lever f. When the lever f is operated to enable the machine to be dismantled from the operative position shown, the clutch is put in to rotate the screws d in a direction to depress thefountain e, and this movement is transmitted by the action of the fountain, or its bracket, or a lever n which operates to raise the doctor blade m<5> by means of a link m<2>, and lever m<3>, and also operates a shaft l of a cam l<1> which effects other controls as follows. The cam l<1> acts on a bellcrank lever n to throw in a clutch g to cause rotation of a shaft i, which acts by worm gearing i<1> to rotate the slotted bearings j<5> of the plate cylinder j to such a position that the cylinder shaft can be withdrawn from the bearings. The shaft i also.operates nuts k<7> by spiral and worm gearing, and the nuts operate screws k<5> which are raised together with bearing boxes k<6> in which the impression cylinder is mounted A cam q on one bearing-box k<6> actuates a spring-controlled rod q<2> which automatically throws out a clutch on the shaft t of the feeder and cutting cylinders. The cam l also actuates, via a lever o, link o<1>, and lever p, a cock p<2> which controls the supply of cleansing fluid to a pipe p<3> which directs the fluid on to the doctor blade and the printing cylinder. The clutch on shaft c is returned to inoperative position by the action of the fountain on a bell-crank g connected by a link g<1> to the clutch lever f.