Production of printing blocks or forms

Details Production of printing blocks or forms Production of printing blocks or forms

1979-07-20

1981-10-06

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 78, 358 80, H04N 138

Patent

active

042938724

ABSTRACT:
This invention relates to the production of a printing block or form of the kind in which at least one original is scanned optoelectronically to obtain image signals being mixed to generate a composite signal and is recorded as the printing block or form, one of the image signal which is to be mixed being modulated by a control signal and the other image signal being modulated by the amplitude-inverted control signal and the modulated image signals being summated to obtain said desired composite signal, said control signal determining a mixing range and the mixing characteristic within said mixing range.
According to the invention, the said control signal is derived from the color information of a colored control mask by scanning said mask or from the image content of the original.

REFERENCES:
patent: 3739078 (1973-06-01), Pugsley
patent: 3878559 (1975-04-01), Pugsley
patent: 3887939 (1975-06-01), Hunt
patent: 3894178 (1975-07-01), Pugsley
patent: 4054916 (1977-10-01), Knop

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