Electrophotographic developing device having toner removing mean

Details Electrophotographic developing device having toner removing mean Electrophotographic developing device having toner removing mean

1984-09-24

1986-07-22

Welsh, John D.

Coating apparatus

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

With electromagnetic and/or electrostatic removal of...

118657, 118658, G03G 1509

Patent

active

046012583

ABSTRACT:
A device for developing an electrostatic latent image carried on an image bearing member comprises a developing sleeve for transporting a magnetic developer as carried thereon through a developing station where the developer is applied to the image bearing member to develop the latent image thereon, a doctor blade for forming a developer film of predetermined thickness and charge, a plurality of magnets disposed inside of the developing sleeve to have the magnetic developer attracted to the developing sleeve, and a scraper for removing the developer remaining on the sleeve after development. In the preferred embodiment, the scraper is pivotally supported and at least comprised of a magnetic material thereby allowing it to be pressed against the sleeve due to magnetic attraction from the magnets inside of the sleeve. In addition, the scraper is provided with a surface-hardened portion at least at that section which comes into contact with the developer on the sleeve when the scraper is pressed against the sleeve.

REFERENCES:
patent: 3882823 (1975-05-01), Tanaka et al.
patent: 3955533 (1976-05-01), Smith et al.
patent: 4226524 (1980-10-01), Hashimoto
patent: 4311780 (1982-01-01), Mochizuki et al.

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