Printing plate inspection apparatus

Details Printing plate inspection apparatus Printing plate inspection apparatus

1977-07-05

1979-04-10

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

73105, 358107, H04N 718, G01B 528

Patent

active

041491874

ABSTRACT:
A printing plate inspection apparatus for inspecting the dot profile of photo-engraved printing plates having a length of opaque material having a straight edge which is placed adjacent the surface to be inspected with a light source to light the surface on one side of the straight edge, and a viewing device on the other side of the straight edge to receive the light reflected from the surface under the straight edge to determine the dot profile.

REFERENCES:
patent: 1447176 (1923-03-01), Henry
patent: 2474015 (1949-06-01), Shaw
patent: 3715476 (1973-02-01), Watanabe
patent: 3819855 (1974-06-01), Rush
patent: 3908079 (1975-09-01), Worthley
patent: 3922093 (1975-11-01), Dandliker

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