Invention Grant
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
- Patent Title: Resin coated carrier, two-component developer, developing device and image forming apparatus
- Patent Title (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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Application No.: US12495973Application Date: 2009-07-01
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Publication No.: US08741525B2Publication Date: 2014-06-03
- Inventor: Osamu Wada , Takanori Kamoto , Tadashi Iwamatsu , Nobuyuki Yoshioka , Hiroyuki Hirakawa , Yoshinori Mutoh , Takashi Hara , Hirofumi Kanda , Yoshio Ichii
- Applicant: Osamu Wada , Takanori Kamoto , Tadashi Iwamatsu , Nobuyuki Yoshioka , Hiroyuki Hirakawa , Yoshinori Mutoh , Takashi Hara , Hirofumi Kanda , Yoshio Ichii
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Nixon & Vanderhye P.C.
- Priority: JPP2008-176385 20080704
- Main IPC: G03G9/00
- IPC: G03G9/00

Abstract:
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.
Public/Granted literature
- US20100003614A1 RESIN COATED CARRIER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS Public/Granted day:2010-01-07
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