Flash lamp type illuminating device for a copier with uniform di

Details Flash lamp type illuminating device for a copier with uniform di Flash lamp type illuminating device for a copier with uniform di

1991-09-20

1993-06-01

Donovan, Lincoln

Photocopying

Contact printing

Light boxes

355 70, G03G 1504

Patent

active

052164683

ABSTRACT:
An illuminating device incorporated in a copier for illuminating the entire image surface of a document laid on a glass platen by a plurality of flash lamps. The voltages to be applied to the flash lamps and, therefore, the quantities of light to issue from the lamps, are controlled to illuminate the image surface of a document in a uniform illuminance distribution. Even when use is made of a document having a fraction of another document adhered thereto, shadows ascribable to the edges of the fraction or patch do not appear.

REFERENCES:
patent: 3732004 (1973-05-01), Yamanoi et al.
patent: 4110040 (1978-08-01), Wittenberg et al.
patent: 4350433 (1982-09-01), Seto et al.
patent: 5021833 (1991-06-01), Kobayashi et al.

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