Halftone printing system

Details Halftone printing system Halftone printing system

1979-11-01

1981-10-20

Kimlin, Edward C.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

355 70, 355 77, 430394, 430396, 430494, 1014631, G03F 500, G03C 500

Patent

active

042961971

ABSTRACT:
In a halftone printing system, halftone positive prints are made directly from gray scale photographic negatives by an enlarger apparatus which shines a beam of light through the negative and focuses an image of the negative on a sheet of high contrast photographic printing paper through a halftone screen. A secondary light source is provided to irradiate the printing paper to provide satisfactory halftone representation of the gray scale. The positive halftone prints are assembled with cold type from which a negative is made. From the negative, a printing plate is then made.

REFERENCES:
patent: 3129099 (1964-04-01), Consaul
patent: 3179519 (1965-04-01), Velten
patent: 3506350 (1970-04-01), Denner
patent: 3597077 (1971-08-01), Dorn
Noemer, Halftone Photography, 1969, pp. 76 and 79.
Kosloff, Screen Process Printing, 1952, p. 179.
Cartwright, Graphic Arts Manual, vol. 2, "Photolithography," 1966, pp. 261-268, 283-291, 455-458, 212-213.

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