Print quality control device for perfecting press

Details Print quality control device for perfecting press Print quality control device for perfecting press

1994-09-12

1995-11-28

Pham, Hoa Q.

Optics: measuring and testing

By configuration comparison

With comparison to master, desired shape, or reference voltage

250548, 25055945, 271256, 271266, G01B 1100, G01N 2186

Patent

active

054713099

ABSTRACT:
A print quality control device for the analysis of the quality of printing on both sides of a sheet printed on a perfecting rotary printing press utilizes video cameras and flash sources on opposing sides of a sheet transport path. The cameras and flash sources are caused to operate to obtain an image of the forward and reverse sides of printed sheets. These images can be compared with set values to determine if the printed sheet's printed forward and reverse surfaces have acceptable printing quality.

REFERENCES:
patent: 4002823 (1977-01-01), Van Osterhout
patent: 4488808 (1984-12-01), Kato
patent: 4877323 (1989-10-01), Stillwagon
patent: 4972093 (1990-11-01), Cochran et al.
patent: 5018213 (1991-05-01), Sikes

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