Developing device used in electrophotographic field with a one-c

Details Developing device used in electrophotographic field with a one-c Developing device used in electrophotographic field with a one-c

1990-03-16

1992-03-17

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118651, 118653, 355259, G03G 1506

Patent

active

050972944

ABSTRACT:
A developing device using a one-component developer which includes colored fine synthetic resin toner particles. The device includes a vessel for holding the developer, and a developing roller rotatably provided within the vessel. A portion of the device is exposed therefrom and is resiliently pressed against a surface of a photosensitive drum. The toner particles are held by the surface of the developing roller to form a developer layer therearound, and are carried to the surface of the image formation drum for development of an electrostatic latent image formed thereon. The developing device further includes a blade member provided within the vessel and is resiliently engaged with the developing roller for regulating a thickness of the developer layer formed therearound. The blade member is such that a proper regulation of the developer layer can always be ensured. The blade member is pivotally provided within the vessel so as to be resiliently and tangentially engaged with the developing roller for regulating the thickness of the developer layer on the developing roller.

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