Device for positioning and punching platemaking films

Details Device for positioning and punching platemaking films Device for positioning and punching platemaking films

1975-04-07

1976-08-10

La Roche, Eugene

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250202, 250209, 356172, G01J 120

Patent

active

039743748

ABSTRACT:
A device is disclosed for positioning printing plates for multicolor printing and films for making such plates with respect to a punch to punch them with register holes at the same precise position. Cross marks on a film or plate are used to detect its position. The device includes a movable table on which the film or plate is taped, detectors for detecting the cross marks on the film or plate and electrically connected to motors for driving the table, and a punch mounted on the edge of the table. Responsive to the electrical signals from the detectors the motors move the table and thus the film or plate to bring the cross marks thereon into exact alignment with the detectors for accurate punching.

REFERENCES:
patent: 3617751 (1971-11-01), Levy et al.
patent: 3657545 (1972-04-01), Horne
patent: 3838274 (1974-09-01), Doubek et al.

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