Rotary drum structure in an image-forming machine

Photocopying – Contact printing – Light boxes

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439 11, G03G 1500

Patent

active

051307510

ABSTRACT:
A drum support structure equipped with a rotary drum and a drum support shaft. The rotary drum includes a cylindrical main body with a photosenstive member disposed on the peripheral surface thereof, and a front flange and a rear flange fixed to the front end and rear end of the main body. A hollow grip case is fitted to the front end of the drum support shaft. In the hollow grip case are disposed a pair of electrode pieces and a resilient urging means that resiliently presses the electrode pieces onto the drum support shaft. The rear flange is made of an electrically conductive material, and the photosensitive member is grounded via the rear flange, drum support shaft and electrode pieces. In the rotary drum is disposed an electric heating means. A pair of electrode rings are fastened to the front flange by means of coupling fittings. The electric heating means is connected to the power source via the coupling fittings and electrode rings.

REFERENCES:
patent: 3136590 (1961-07-01), Manson
patent: 4161357 (1979-07-01), Herman et al.
patent: 4319825 (1982-03-01), Komori et al.
patent: 4954084 (1990-09-01), Pugh et al.
patent: 4975743 (1990-12-01), Surti
patent: 5006747 (1991-04-01), Stewart, Sr.

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