Slit illumination system for copying machine

Details Slit illumination system for copying machine Slit illumination system for copying machine

1975-08-05

1976-09-21

Moses, R. L.

Buckles, buttons, clasps, etc.

355 8, 355 67, G03B 1502, G03B 2754

Patent

active

039821161

ABSTRACT:
In an electrostatic copying machine, an original document is scanned by moving an original document over an illuminated slit. The system for illuminating the slit comprises an elongated light source and a first elliptic cylindrical mirror having a focus coincident with the axis of the light source to reflect light from the source into the slit. A second elliptic cylindrical mirror has a focus common with the first mirror and reflects light from the source parallel to the slit. A plane mirror reflects the light reflected from the second mirror into the slit.

REFERENCES:
patent: 3302519 (1967-02-01), Young
patent: 3368071 (1968-02-01), Bentzman
patent: 3467469 (1969-09-01), Hastings et al.
patent: 3669538 (1972-06-01), Fowler
patent: 3724942 (1973-04-01), Gibson et al.
patent: 3807856 (1974-04-01), Rodriguez
patent: 3834807 (1974-09-01), Fuller et al.
"Slotted Aperture", G. T. Williams, pp. 3320, 3321, IBM Tech. Bull., vol. 14, no. 11, Apr. 1972.
"Illumination Arrangement" (13517) p. 17 Research Disclosure July 1975.
"Illumination to Eliminate Shadows", J. D. Bersot et al., p. 521, IBM Tech. Bull., vol. 15, No. 2, July 1972.

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