Method of determining the area coverage of a printed original or

Details Method of determining the area coverage of a printed original or Method of determining the area coverage of a printed original or

1985-12-04

1987-07-21

Willis, Davis L.

Optics: measuring and testing

Of light reflection

356448, 356380, G01B 1128

Patent

active

046814558

ABSTRACT:
A measuring device which is equipped with a number of sensors determines the area coverage of a printing original or printing plate for printing presses. Each individual sensor of the measuring device is calibrated with the air of calibration strips. By means of an additional sensor of the measuring device, a printing-plate and/or printing-original-specific correction calibration and an adjustment to identical values of all sensors are provided. The correction calibration and adjustment are performed by way of a calibration field and a calibration area on the printing plate and/or printing original.

REFERENCES:
patent: 3053181 (1962-09-01), Jorgensen
patent: 3509349 (1970-04-01), Molines et al.
patent: 3890048 (1975-06-01), Abbondio et al.
patent: 3958509 (1976-05-01), Murray et al.
patent: 4180741 (1979-12-01), Palmatier et al.
patent: 4441819 (1984-04-01), Takeuchi et al.

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