发明授权
US08741525B2 Resin coated carrier, two-component developer, developing device and image forming apparatus
有权
树脂涂层载体,双组分显影剂,显影装置和成像装置
- 专利标题: Resin coated carrier, two-component developer, developing device and image forming apparatus
- 专利标题(中): 树脂涂层载体,双组分显影剂,显影装置和成像装置
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申请号: US12495973申请日: 2009-07-01
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公开(公告)号: US08741525B2公开(公告)日: 2014-06-03
- 发明人: Osamu Wada , Takanori Kamoto , Tadashi Iwamatsu , Nobuyuki Yoshioka , Hiroyuki Hirakawa , Yoshinori Mutoh , Takashi Hara , Hirofumi Kanda , Yoshio Ichii
- 申请人: Osamu Wada , Takanori Kamoto , Tadashi Iwamatsu , Nobuyuki Yoshioka , Hiroyuki Hirakawa , Yoshinori Mutoh , Takashi Hara , Hirofumi Kanda , Yoshio Ichii
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Nixon & Vanderhye P.C.
- 优先权: JPP2008-176385 20080704
- 主分类号: G03G9/00
- IPC分类号: G03G9/00
摘要:
The resin coated carrier is used with a toner in which an external additive having an average primary particle size of 50 nm or more is added to a toner particle, and has a carrier core and a resin coating layer on the surface of the carrier core. In the resin coated carrier, the following expression (1) is satisfied: 0.5≦−log {(A/C)/(B/C)}≦2.5 (1) wherein A represents a volume resistance value (Ω/cm) of the resin coated carrier in an electric field of 1000 V/cm that is obtained by conducting a stirring test, B represents a volume resistance value (Ω/cm) of the resin coated carrier in an electric field of 1000 V/cm before the stirring test, and C represents a volume resistance value (Ω/cm) of the carrier core in an electric field of 1000 V/cm.
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