Developing device

Details Developing device Developing device

1989-07-20

1990-09-11

Moses, R. L.

Coating apparatus

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

With electromagnetic and/or electrostatic removal of...

355253, 355260, 222DIG1, G03G 1509

Patent

active

049553160

ABSTRACT:
A developing device comprising: a developing magnet roller for feeding developer onto a photoreceptor; a shutter mechanism for switching from feeding developer to the developing magnet roller to suspending the above supply, or vice versa; a delivery magnet roller for receiving developer from the developing magnet roller and conveying it to a path leading to the shutter mechanism; a toner feed path for interconnecting a toner hopper disposed at the upper end of a main body of the developing device and the space above the shutter mechanism. In order to prevent toner from escaping through a gap formed between the toner hopper and its lid, the developing device is designed to have an interconnecting path for interconnecting the space in the vicinity of the toner feed path within the main body and a different space within the main body, or to have, within the toner hopper, a guide member for guiding air that has come into the toner hopper from the main body through the toner feed path, so as to avoid a gap between the toner hopper and its lid, thereby preventing toner from scattering outside the developing device through the above gap.

REFERENCES:
patent: 4351604 (1982-09-01), Karasawa et al.
patent: 4592653 (1986-06-01), Ikeda et al.
patent: 4699079 (1987-10-01), Palm et al.
patent: 4786936 (1988-11-01), Ikegawa et al.
patent: 4800412 (1989-01-01), Ueda

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