Invention Grant
- Patent Title: Latent electrostatic image developing carrier, process cartridge and image forming apparatus
- Patent Title (中): 潜在的静电图像显影载体,处理盒和成像装置
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Application No.: US13592626Application Date: 2012-08-23
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Publication No.: US08663892B2Publication Date: 2014-03-04
- Inventor: Shigenori Yaguchi , Kimitoshi Yamaguchi , Toyoshi Sawada , Hitoshi Iwatsuki , Toyoaki Tano , Hiroshi Tohmatsu
- Applicant: Shigenori Yaguchi , Kimitoshi Yamaguchi , Toyoshi Sawada , Hitoshi Iwatsuki , Toyoaki Tano , Hiroshi Tohmatsu
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-196277 20110908
- Main IPC: G03G9/113
- IPC: G03G9/113

Abstract:
A latent electrostatic image developing carrier including: core particles each having magnetism; and a coating layer covering each of the core particles, wherein the latent electrostatic image developing carrier has a shape factor SF-2 of 115 to 150 and has a bulk density of 1.8 g/cm3 to 2.4 g/cm3, wherein the core particles have a shape factor SF-2 of 120 to 160 and have an arithmetic mean surface roughness Ra of 0.5 μm to 1.0 μm, and wherein the coating layer contains a resin and a filler and an amount of the filler contained in the coating layer is 50 parts by mass to 500 parts by mass per 100 parts by mass of the resin contained in the coating layer.
Public/Granted literature
- US20130065171A1 LATENT ELECTROSTATIC IMAGE DEVELOPING CARRIER, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS Public/Granted day:2013-03-14
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