Shading board for copying apparatus

Details Shading board for copying apparatus Shading board for copying apparatus

1989-12-14

1991-11-19

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355243, 355 55, 355 71, G03G 1504, G03B 2750

Patent

active

050669877

ABSTRACT:
In an electrophotographic copying apparatus, reflected light from an original subject is directed to a light receiving means, such as a photoconductive drum, through a slit. The apparatus includes an optical device, for example a zoom lens, positioned between the original subject and the photoconductive drum for varying the size of the optical image being passed through the slit. A shading board fixed adjacent to the photoconductive drum extends along a longitudinal direction of the optical image.

REFERENCES:
patent: 4095884 (1978-06-01), Okamoto et al.
patent: 4125323 (1978-11-01), Ikeda et al.
patent: 4243312 (1981-01-01), Ogawa
patent: 4260249 (1981-04-01), Armitase, Jr. et al.

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