Method for production of impressions of accurate register on pri

Printing – Intaglio – Processes

Patent

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Details

Other Related Categories

101248, 101350, 364519, B41F 1324, B41J 3300

Type

Patent

Status

active

Patent number

044282877

Description

ABSTRACT:
An apparatus and method for checking and automatically correcting register adjustment of a sheet-fed printing press at the same time as remote densitometric measurement of an ink density check strip for ink fountain key adjustment. To read alignment marks printed parallel to the ink density check strip, a second optical sensor is mounted on the ink density scanner already used in practice to traverse and read the ink density check strip. A register control computer accepts the signal from the second optical sensor, detects the relative positions of the scanned alignment marks, compares the relative positions to each other and calculates axial, peripheral, and skew register adjustments. Position information is exchanged between the register control computer and the corresponding ink density control computer. The measured positions of the ink density check strip segments, for example, can be used in part to determine the positions of the register marks.

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patent: 3567923 (1971-03-01), Hutchison
patent: 3701464 (1972-10-01), Crum
patent: 3915090 (1975-10-01), Horst et al.
patent: 3958509 (1976-05-01), Murray
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patent: 4200932 (1980-04-01), Schramm et al.
patent: 4233663 (1980-11-01), Sugawara et al.
patent: 4318176 (1982-03-01), Stratton et al.
Heidelberg Offset CPC Brochure Published at Dupra, Jun. 3-16, 1977.
Der Polygraph (MAVO Article), 10/22/75, pp. 1393-1400 (translation included).

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