Developing unit with developing gap control

Details Developing unit with developing gap control Developing unit with developing gap control

2007-01-09

2007-01-09

Beatty, Robert (Department: 2852)

Electrophotography

Having particular structure

Modular or displaceable

C399S119000

Reexamination Certificate

active

10778155

ABSTRACT:
A developing unit of an image forming apparatus which can maintain a regular developing gap without a separate pressing member. The developing unit comprises a photoconductive drum which is rotatable, a developing roller rotating in association with the photoconductive drum and attaching a toner to the photoconductive drum, a toner supplying roller for supplying the toner to the developing roller, a first support body for rotatably supporting the photoconductive drum, and an idle gear being mounted in the first support body so that the centers of the idle gear, the photoconductive drum and the developing roller are arranged to form a triangle. In such an arrangement, a force is created and exerted upon the rollers to determine a position of the developing roller with respect to the photoconductive drum.

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