Combined sheet fed rotary printing machine for securities, in pa

Details Combined sheet fed rotary printing machine for securities, in pa Combined sheet fed rotary printing machine for securities, in pa

1984-11-28

1985-11-12

Eickholt, E. R.

Printing

Intaglio

Multicolor

101248, B41F 902, B41F 1324

Patent

active

045520666

ABSTRACT:
The printing machine has a multi-color offset printing unit, behind this a sheet conveying device, and an intaglio printing unit to which the sheets printed and provided with register marks in the first printing unit are transferred by the conveying device. The conveying device comprises a detector system responding to these register marks, and a register drum. Each of the two printing units and the register drum have their own drive mechanisms mechanically independent of each other. The drive mechanism for the second printing unit is controlled in dependence upon the speed of the first printing unit, and the drive mechanism for the register drum is controlled on the one hand in dependence upon the speed of the second printing unit and on the other hand in dependence upon the register deviation measured in the circumferential direction. Further, on the register drum are disposed devices for correcting side register and any skew of a sheet in dependence upon the measured register deviations. A second detector system reads the position of the abovementioned register marks relative to further register marks applied in the intaglio printing unit, and if necessary performs fine correction of register.

REFERENCES:
patent: 3557692 (1971-01-01), Lee
patent: 3701464 (1972-10-01), Crum
patent: 3746957 (1973-07-01), Forster et al.
patent: 3858052 (1974-12-01), Luska
patent: 4394835 (1983-07-01), Gertsch et al.
patent: 4428287 (1984-01-01), Greiner
patent: 4484522 (1984-11-01), Simeth

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