Preexposure device for printing forms to be imagewise exposed

Details Preexposure device for printing forms to be imagewise exposed Preexposure device for printing forms to be imagewise exposed

1993-07-28

1995-10-03

Sikes, William L.

Radiant energy

Photocells; circuits and apparatus

Combined with diverse-type device

250205, 355 71, 355100, 355220, G03T 500, G03T 700

Patent

active

054554160

ABSTRACT:
A preexposure device having a linear LED arrangement for preexposing printing forms over their full area. The linear LED arrangement comprises at least two rows of LED modules which are offset with respect to one another. Each module is made up of a plurality of light-emitting diodes. The linear LED arrangement is disposed within a housing which is closed off at the bottom by means of a light scattering plate.

REFERENCES:
patent: 3144331 (1964-08-01), Thommes
patent: 3859091 (1975-01-01), Wessells et al.
patent: 4298803 (1981-11-01), Matsuura et al.
patent: 4716097 (1987-12-01), Weed
Patent Abstracts of Japan, vol. 12, No. 274 (M-725) Jul. 29, 1988 and JP-A-63 057 262, published Mar. 11, 1988.

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