Iwatsu Electric Company Ltd.

Kiyohito Ebisawa

Toshio Koike

Satoshi Hisabayashi

Kazuyuki Hashimoto

Mitsuo Kuromori

An exposure device of an electrographic copying apparatus including at least one heat generative exposure lamp for exposing a photosensitive paper corresponding to an original to be copied. A paper detector detects the photosensitive paper at an inlet of the apparatus. A rotatable cam is actuated by a signal from the paper detector and, in turn, actuates a switching apparatus in a predetermined sequence during one revolution thereof. A relay is actuated by one of said switches so as to be self-latched for a predetermined time, to activate the exposure lamp for the predetermined time.

Exposure device of an electrographic copying apparatus

An electrographic copying apparatus which includes a paper feeding device, a charging device, an exposure device, a developing device including a developing vessel, a developer feed pump, and pressure rollers, and a paper conveyor, wherein each operational device is operated in a predetermined sequence, the original to be copied can be easily set into place, photographic papers of various sizes are usable, the developer can easily be replenished, and a pressing roller can be easily removed when desired.

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Tokyo, Japan

Kiyohito Ebisawa