Developing device and image forming apparatus
AssigneeFuji Xerox Co., Ltd.
InventorsShinichi Kuramoto, Yoshifumi Ozaki, Ryota Tomishi, Junichi Uchiyama, Yoshitaka Nakajima, Norihiro Tamazawa
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Abstract
A developing device includes a developer carrier that opposes an image carrier and rotates while carrying developer on a surface thereof; and a container that supports the developer carrier in a rotatable manner and contains the developer, the developer containing toner, first carrier subjected to frictional charging together with the toner, and second carrier having a diameter greater than a diameter of the first carrier and an electrical resistance lower than an electrical resistance of the first carrier.
Claims8
A developing device comprising:
- a developer carrier that opposes an image carrier and rotates while carrying developer on a surface thereof;
- and
- a container that supports the developer carrier in a rotatable manner and contains the developer, the developer containing toner, a first carrier subjected to frictional charging together with the toner, and a second carrier having a diameter greater than a diameter of the first carrier and an electrical resistance lower than an electrical resistance of the first carrier,
- wherein the first carrier has a particle size of 15 to less than 20 μm and the second carrier has a particle size of greater than 60 to 70 μm.
A developing device comprising:
- a developer carrier that opposes an image carrier and rotates while carrying developer on a surface thereof;
- and
- a container that supports the developer carrier in a rotatable manner and contains the developer, the developer containing toner, a first carrier subjected to frictional charging together with the toner, and a second carrier having a diameter greater than a diameter of the first carrier and an electrical resistance lower than an electrical resistance of the first carrier,
- wherein the electrical resistance of the second carrier is less than 1×108 ohms.
Dependencies are inferred from the claim text.