Invention Grant
- Patent Title: Carrier for developing electrostatic latent image, and electrostatic latent image developer
- Patent Title (中): 用于显影静电潜像的载体和静电潜像显影剂
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Application No.: US13932368Application Date: 2013-07-01
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Publication No.: US09146487B2Publication Date: 2015-09-29
- Inventor: Toyoshi Sawada , Shigenori Yaguchi , Hiroshi Tohmatsu , Hitoshi Iwatsuki , Toyoaki Tano , Hiroyuki Kishida , Yumiko Yagi
- Applicant: Toyoshi Sawada , Shigenori Yaguchi , Hiroshi Tohmatsu , Hitoshi Iwatsuki , Toyoaki Tano , Hiroyuki Kishida , Yumiko Yagi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2012-161331 20120720
- Main IPC: G03G9/113
- IPC: G03G9/113

Abstract:
A carrier for developing electrostatic latent images includes a core material; and a covering layer formed of a resin comprising an electroconductive particulate material, overlying the core material, wherein the covering layer includes the electroconductive particulate material in an amount of from 58 to 73% by weight and has a resistivity of from 6.6 to 8.6 Ωcm, and wherein the carrier has a high-brightness contrast part at an areal ratio less than 1% and 40 to 90% based on total area thereof at an acceleration voltage of 0.8 KV and 2.0 KV, respectively in an FE-SEM reflection electron image of the surface thereof.
Public/Granted literature
- US20140023966A1 CARRIER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, AND ELECTROSTATIC LATENT IMAGE DEVELOPER Public/Granted day:2014-01-23
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