Process for electrophotographic matrix printing and device for c

Details Process for electrophotographic matrix printing and device for c Process for electrophotographic matrix printing and device for c

1986-03-14

1987-09-08

Prescott, A. C.

Photocopying

Including fiber optics

355 3R, 355 8, 355 71, 355 14R, 350358, 358300, 358302, G03G 1500

Patent

active

046920161

ABSTRACT:
A process for electrophotographic matrix printing and apparatus for carrying out this process, the apparatus comprising a plane assembly of modulating strips disposed alternately along two parallel lines, an optical light guide for guiding the light emitted by a virtual pinpoint light source in the form of two convergent light sheets respectively traversing the two lines of modulators, and a rotary drum whose lateral surface consists of a photosensitive support. The optical light guide is formed of a plate with plane parallel surfaces, bounded by three rims. The first rim has a toroidal form whose center corresponds to the position of the source; the second rim has a cylindro-parabolic form and the third rim comprises a dihedron whose edge is parallel to the plane faces of the guide. Writing can be effected line by line along a direction substantially parallel to the axis of rotation of the photosensitive support.

REFERENCES:
patent: 4389655 (1983-06-01), Baues
patent: 4400740 (1983-08-01), Traino et al.
patent: 4427291 (1984-01-01), Day
patent: 4447126 (1984-05-01), Heidrich et al.
patent: 4480257 (1984-10-01), Hill
patent: 4577933 (1986-03-01), Yip et al.
patent: 4624555 (1986-11-01), Tokuhara et al.
patent: 4641950 (1987-02-01), Rongen et al.

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