GB191507755A - Improvements in Rotary Machines for Intaglio Printing. - Google Patents

Abstract

7755. Oudshoorn, A. May 27, 1914, [Convention date]. Intaglio printing; printing - surfaces; impression surfaces; tripping and like arrangements. - A rotary "double ender" machine for perfecting a web by intaglio printing has the intaglio cylinder divided into two parts of different diameters mounted on one shaft supported by a bearing between the two parts. The impression cylinder is preferably also in two parts mounted end to end and supported between the two parts. The web is printed on one side by one part of the intaglio cylinder, and is then reversed and transferred laterally, so that it may be passed through the other part for perfecting, and in case of stretching or sagging of the web between the two printings, this is compensated for by the different diameters of the two parts of the cylinder. By this divided arrangement, moreover, the two parts of the printing-cylinder may be mounted on their shaft for etching in the same bath to effect the same depth of etching in each part. The two parts c, c' of the intaglio cylinder are mounted on the shaft b by means of coned parts b<1> and screwed rings b<2>. The shaft b is supported by a central bearing a<2> as well as by the usual end bearings. The impression cylinders d, d<1> are mounted end to end in bearings d<2> adjustable separately by devices f, and the bearings d<2> are fitted in a strong cross-bar c movable for adjusting the cylinders simultaneously by screws h<1> rotatable in the frame a by bevel-gearing h, g<2> and a hand-wheel g<1> on the shaft g. The parts c, c<1> rotate in separate ink-reservoirs, and scrapers are provided for removing the surplus ink. The scrapers act both on the surface and on the ends of the parts c, c<1>. The reservoirs i, i<1> are vertically adjust able simultaneously by means of their supports i<2> connected by steel cables j<2> to a drum j<1> movable by a hand-lever j.