Plate-making method and plate-making apparatus for printing

Details Plate-making method and plate-making apparatus for printing Plate-making method and plate-making apparatus for printing

1993-04-19

1994-11-22

Fuller, Benjamin R.

Photocopying

Projection printing and copying cameras

Illumination systems or details

359 41, 359 72, 101456X, G03G 1600

Patent

active

053673590

ABSTRACT:
A plate-making apparatus equipped with an optical system and a light-light transforming device comprising a photoconductive layer and a light-modulation layer which are in confronting relation to each other and which are interposed between a pair of electrodes. The optical system supplies optical information to the photoconductive layer, and the pair of electrodes are for generating an electric field therebetween to be applied to the photosensitive layer and the light-modulation layer. Also included in the apparatus for emitting light having a predetermined wavelength, the light being led to the light-modulation layer to generate reflection light therefrom which is modulated in correspondance with the optical information supplied from the optical system to the photoconductive layer. The reflection light is arranged so as to illuminate a photosensitive resin layer, which is in turn denatured or hardened in response to the illumination so as to produce a print plate.

REFERENCES:
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patent: 3948655 (1976-04-01), Wells
patent: 4002829 (1977-01-01), Hutchison
patent: 4150396 (1979-04-01), Hareng et al.
patent: 4672014 (1987-06-01), Joiner et al.
Grinberg et al., "A New Real-Time Non-Coherent to Coherent Light Image Converter . . . ", Optical Engineering vol. 14 No. 3, May-Jun. 1975, pp. 217-224.
Haas et al., "Ultralow-voltage Image Intensifiers", Applied Physics Letters vol. 29 No. 10, Nov. 15, 1976, pp. 631-632.

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