Printing – Inkers – Fountains
Patent
1971-02-19
1976-06-29
Coughenour, Clyde I.
Printing
Inkers
Fountains
91422, 417466, 417469, 417491, 417495, 417549, B41F 3108, B41F 3118
Patent
active
RE0288802
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. A ball valve in the lower end of the relief piston is normally spring-biased to close the outlet passage of the relief piston, and a second spring in the bore above the relief piston normally urges the relief piston into position in which the ball valve closes communication between the first chamber and the opening in the bottom of the first cylinder. The piston rod is adapted to receive printing pressure whereby the chambers will be contracted by the application of pressure on the printing plate during printing, and will expand when such pressure is released, the chamber expansion causing a further supply of ink to be sucked into the chambers ready for the next printing operation; and the ball valve being closed automatically by application of said pressure.
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Colorflo Limited
Coughenour Clyde I.
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