Device for scanning pale color marks on a printing machine

Details Device for scanning pale color marks on a printing machine Device for scanning pale color marks on a printing machine

1992-05-06

1993-06-01

Eickholt, Eugene H.

Printing

Multicolor

Rotary machines

101248, 250561, 250548, 356429, 382 8, 382 62, B41F 516

Patent

active

052150119

ABSTRACT:
A device for scanning marks printed on workpieces travelling under a light source includes at least two parallel mark scanning channels emitting an electric impulse due to passage of a mark, each channel being sensitive to a particular color. The device incudes, moreover, electronics for selecting a most representative mark impulse among the electric impulses emitted by the channels.

REFERENCES:
patent: 4534288 (1985-08-01), Brovman
patent: 4546700 (1985-10-01), Kishner et al.
patent: 4932320 (1990-06-01), Brunetti et al.
patent: 4947746 (1990-08-01), Jeschke et al.
patent: 5076163 (1991-12-01), Sainio
patent: 5122977 (1992-06-01), Pfeiffer
patent: 5125037 (1992-06-01), Lehtonen et al.
patent: 5126578 (1992-06-01), Roch et al.
Patent Abstracts of Japan, vol. 10, No. 372, Dec. 11, 1986; Shinichi Furuya; "Detector for Printing Paper with Defective Density Register".

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