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AssigneeCanon Kabushiki Kaisha
InventorsSeiji Yamaguchi, Atsushi Numagami, Minoru Sato, Yoshiyuki Batori
Estimating the term…
A developing device for use in an electrophotographic image forming apparatus, includes a developing member for developing a latent image formed on an electrophotographic photosensitive member, a developer containing portion for containing a developer to be used in developing with the developing member, the latent image being formed on the electrophotographic photosensitive member, an agitating member for agitating the developer contained in the developer containing portion, and a frame rotatably supporting the agitating member and having a hole for rotatably supporting the agitating member, of which an end enters the hole and is rotatably supported by the hole. The length of the agitating member in contact with the inner surface of the hole is shorter, in the longitudinal direction of the hole, than the length of the agitating member present in the hole.
A developing device for use in an electrophotographic image forming apparatus, comprising:
A process cartridge detachably mountable on a main body of an electrophotographic image forming apparatus, comprising:
An electrophotographic image forming apparatus for forming an image on a recording medium, comprising:
An electrophotographic image forming apparatus on which a process cartridge is detachably mountable for forming an image on a recording medium, comprising:
A developing device for use in an electrophotographic image forming apparatus, comprising:
A process cartridge detachably mountable on a main body of an electrophotographic image forming apparatus comprising:
A developing device for use in an electrophotographic image forming apparatus, comprising:
A developing device for use in an electrophotographic image forming apparatus, comprising:
A process cartridge detachably mountable on a main body of an electrophotographic image forming apparatus, comprising:
A process cartridge detachably mountable on a main body of an electrophotographic image forming apparatus, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Using a solid developer, e.g. powder developer: arrangements for preparing, mixing, supplying or dispensing developer
Cartridge systems: process cartridge
Electrography
Term ended 26 Oct 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to a developing device and a process cartridge for use in an image forming apparatus such as a copying apparatus or a page printer for forming an image with an electrophotographic image forming process or an electrostatic recording process, and such electrophotographic image forming apparatus.
2. Related Background Art
FIG. 1 is a longitudinal cross-sectional view of an electrophotographic image forming apparatus in which the present invention is applicable;
FIG. 2 is a schematic horizontal cross-sectional view of a developing device;
FIG. 3 is a schematic cross-sectional view of a bearing at the non-driving side in a first embodiment;
Now the present invention will be clarified in detail by preferred embodiments shown in the attached drawings.
At first there will be explained, with reference to FIG. 1, the configuration of a general electrophotographic image forming apparatus such as a laser beam printer A. Around a photosensitive drum 20 constituting a latent image bearing member, there are provided a charging roller 21 for uniformly charging the photosensitive drum 20, an optical device 22 for forming an electrostatic latent image on the photosensitive drum 20, a developing device 1 for developing the latent image with toner, a transfer roller 27 constituting transfer means, and a cleaning device 29.
As shown in FIG. 1, the laser beam printer A is to form an image on a recording medium (for example recording paper, OHP sheet, fabric etc.) by an electrophotographic image forming process. A toner image is formed on a drum-shaped electrophotographic photosensitive member (hereinafter called "photosensitive drum"). More specifically, the photosensitive drum is charged by charging means, and irradiated with laser light corresponding to image information from optical means to form a latent image corresponding to the image information on the photosensitive drum. Then the latent image is developed with developing means to form a toner image. In synchronization with the formation of the toner image, the recording medium P set in a sheet cassette 25 is reversed and transported by a pick-up roller 26a and paired registration rollers 26b.