Abstract: Intaglio printing plate apparatus comprising in combination two intaglio die plates one for attachment to the top platen of a printing press and one for attachment to the lower or bottom platen with the recessed intaglio designs of the two plates, facing each other, that one of the plates which is to be attached to the top platen being formed with passages passing through its thickness to the recessed intaglio design, the other plate being formed with air bleed holes leading from the recessed design to atmosphere.

Abstract: Intaglio Printing with a viscous fluid on to non-porous substrates using intaglio plates in which the image cavity is vented to the outside through non-return valve means, thus permitting the escape of air trapped between the non-porous substrate and the image cavity as well as excess fluid which is also restrained from being drawn back into the deposit on withdrawal of the plate. Particularly suitable for printing sealants on selected areas of gaskets.

Abstract: A method of intaglio printing adapted to produce a substantially flat article comprising bringing a die plate, recessed on its printing face to correspond with the required form of the article, against a substrate, injecting a settable material into the die recesses via passages through the thickness of the die plate to deposit material onto the substrate, separating the die plate from the substrate, allowing the material to set or partially set on the substrate and separating the article from the substrate.

Abstract: The feed mechanism for a printing machine in which printing ink is fed into the recessed design of an intaglio printing plate includes a cylinder open at its upper end and communicating at its bottom with the recessed designs. A piston is housed in the cylinder, the lower end of which piston forms a chamber at the bottom of the cylinder. The piston rod extends above the cylinder and carries a support member at its upper end, the support member carrying a head. A second cylinder rests upon the top of the first cylinder and receives the head which is slidable therein within limits. A spring is interposed between the head and the bottom of the second cylinder. The piston and piston rod have a bore forming a second chamber provided at its upper end with an ink supply inlet. A hollow relief piston is slidable in the lower end of the bore communicating with the second chamber and communicating through inlet openings with the first chamber.