Image forming apparatus equipped with photoreceptor having an in

Details Image forming apparatus equipped with photoreceptor having an in Image forming apparatus equipped with photoreceptor having an in

1996-03-07

1999-07-27

Jeffery, John A.

Machine element or mechanism

Gearing

Directly cooperating gears

74409, 74410, G03G 2100

Patent

active

059271485

ABSTRACT:
An image forming apparatus provided with a photoreceptor with an internal gear includes the internal gear in a photoreceptor drum, a pinion gear in engagement with the internal gear, and a cleaning unit and a developer unit which apply contact pressure onto the photoreceptor drum. The pinion gear is provided in such an area that a resulting force of the contact pressure respectively applied from the process elements does not cause a distortion of the photoreceptor drum which exceeds an axial backlash determined in initialization according to a distance between axes of the pinion gear and the internal gear. The described arrangement prevents interference between non-driving surfaces of the internal gear and the pinion gear. As a result, a smooth rotary motion of the photoreceptor drum can be ensured, thereby preventing an image defect caused by an unstable rotary motion of the photoreceptor drum.

REFERENCES:
patent: 3733926 (1973-05-01), Hope et al.
patent: 3966316 (1976-06-01), Pfeifer et al.
patent: 4935778 (1990-06-01), Mochida
patent: 4951093 (1990-08-01), Ishii et al.
patent: 5136330 (1992-08-01), Sato
patent: 5210574 (1993-05-01), Kita

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