Apparatus for four-color halftone printing

Details Apparatus for four-color halftone printing Apparatus for four-color halftone printing

1980-06-20

1982-05-04

Crowder, Clifford D.

Printing

Special article machines

Rotating object

B41F 1708

Patent

active

043276377

ABSTRACT:
A four-color halftone curved surface printing apparatus is provided which comprises a blanket cylinder, four block cylinders arranged around the blanket cylinder and mandrels for supporting an object to be printed. The blanket cylinder includes first and second transfer areas, the two transfer areas being positioned sequentially in the circumferential direction of the blanket cylinder. A first ink layer is positioned on the first transfer area and a second ink layer is positioned on top of the first ink layer. A third ink layer is positioned on the second transfer area and a fourth ink layer is positioned on top of the third ink layer. The four ink layers have different tackiness values with the first ink layer having the highest and the fourth ink layer having the lowest. Further, the tackiness value between each of the four layers is at least one such that the ink layers are adapted to be transferred in order from the blanket cylinder to the object.

REFERENCES:
patent: 2972298 (1961-02-01), De Marchi et al.
patent: 3613571 (1971-10-01), Russell et al.
patent: 3948171 (1976-04-01), O'Connell
patent: 4035214 (1977-07-01), Shuppert et al.
patent: 4241657 (1980-12-01), Fujimori

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