Electrophotographic image forming apparatus

Details Electrophotographic image forming apparatus Electrophotographic image forming apparatus

1997-11-06

1999-07-27

Braun, Fred L.

Electrophotography

Image formation

Development

347131, G03G 1508

Patent

active

059305681

ABSTRACT:
An electrophotographic image forming apparatus has a photosensitive drum; a charging device for charging a surface of the photosensitive drum; an LED array for projecting a light beam on the surface of the photosensitive drum, thereby forming irradiated spots constituting an electrostatic latent image. The irradiated spots are formed on intersections of a grid which is composed of a plurality of first lines extending in a main-scanning direction and arranged at equal first intervals and a plurality of second lines extending in a sub-scanning direction and arranged at equal second intervals. The apparatus also has a developing device for attaching a toner particle extending to each of the irradiated spots, a transfer device for transferring the toner particle to a transfer material, and a fixing device for fixing the toner particle on the transfer material. A diameter of the toner particle is determined in such a way that a diameter of a fixed toner particle is equal to approximately a length of a diagonal line of the grid. Further, the diameter of the toner particle in the developing device is in a range of 0.7 times to 1.0 times as long as the first interval and/or the second interval.

REFERENCES:
patent: 4060323 (1977-11-01), Hirayama et al.
patent: 4361394 (1982-11-01), Sakai et al.
patent: 5268709 (1993-12-01), Saito et al.

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