Image forming apparatus, electrostatic charge image developing carrier set, and process cartridge set
AssigneeFuji Xerox Co., Ltd.
InventorsShintaro Anno, Fusako Kiyono, Emi Matsushita, Hiroki Ohmori, Shuji Sato
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a first image forming unit and a second image forming unit, wherein the first image forming unit is arranged on a downstream side of the second image forming unit in a traveling direction of a transfer medium, the first developing unit contains a first developer containing a first toner and a first carrier, the second developing unit contains a second developer containing a second toner and a second carrier, and a ratio of a resistance value of the first carrier to a resistance value of the second carrier is within a range of from 4.0×10−5 to 9.7×10−1.
Claims14
An image forming apparatus comprising:
- a first image forming unit that includes a first image holding member and a first developing unit that develops an electrostatic charge image formed on a surface of the first image holding member;
- and
- a second image forming unit that includes a second image holding member and a second developing unit that develops an electrostatic charge image formed on a surface of the second image holding member,
- wherein the first image forming unit is arranged on a downstream side of the second image forming unit in a traveling direction of a transfer medium,
- the first developing unit contains a first developer containing a first toner and a first carrier,
- the second developing unit contains a second developer containing a second toner and a second carrier,
- wherein a ratio of a resistance value of the first carrier to a resistance value of the second carrier is within a range of from 4.0×10−5 to 9.7×10−1.
An electrostatic charge image developing carrier set comprising:
- a first carrier;
- and
- a second carrier,
- wherein a first image forming unit including the first carrier is arranged on a downstream side of a second image forming unit including the second carrier in a traveling direction of a transfer medium, and
- a ratio of a resistance value of the first carrier to a resistance value of the second carrier is within a range of from 4.0×10−5 to 9.7×10−1.
A process cartridge set that is detachable from an image forming apparatus, the process cartridge comprising:
- a first process cartridge that includes a first image holding member and a first developing unit that develops an electrostatic charge image formed on a surface of the first image holding member;
- and
- a second process cartridge that includes a second image holding member and a second developing unit that develops an electrostatic charge image formed on a surface of the second image holding member,
- wherein the first process cartridge is arranged on a downstream side of the second process cartridge in a traveling direction of a transfer medium,
- the first developing unit contains a first developer containing a first toner and a first carrier,
- the second developing unit contains a second developer containing a second toner and a second carrier, and
- a ratio of a resistance value of the first carrier to a resistance value of the second carrier is within a range of from 4.0×10−5 to 9.7×10−1.
Dependencies are inferred from the claim text.