Developing unit

Details Developing unit Developing unit

1989-06-16

1991-06-04

Grimley, A. T.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

118657, 355245, 355260, G03G 1506

Patent

active

050204718

ABSTRACT:
A developing unit including: a developing roller disposed in a developer tank in a location facing a recording medium; a supply passage for supplying developer to the developing roller; a shut-off device that is rotatable about the center axis thereof for opening and closing the supply passage; switching means that is provided with a spring clutch for transmitting rotational driving force to the shut-off device and is used for switching the shut-off device between the open and closed states; and a stopping position correcting mechanism for preventing variations in the stopping position of the shut-off device, the correcting mechanism having a clutch fixing plate mounted with screws on the outer wall of the developer tank in a slidable way around the center axis of the shut-off device and an engaging plate projecting from the clutch fixing plate and engaging with the case of the spring clutch.

REFERENCES:
patent: 4338019 (1982-07-01), Terashima et al.
patent: 4595277 (1986-06-01), Maczuszenko et al.
patent: 4688926 (1987-08-01), Manno
patent: 4860063 (1989-08-01), Okamoto
patent: 4914481 (1990-04-01), Yoshikai et al.

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