Invention Grant
- Patent Title: Carrier, developer, method of manufacturing carrier, developer container, image forming method, process cartridge, image forming apparatus, and supplemental developer
- Patent Title (中): 载体，显影剂，制造载体的方法，显影剂容器，成像方法，处理盒，成像装置和补充显影剂
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Application No.: US13213633Application Date: 2011-08-19
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Publication No.: US08652735B2Publication Date: 2014-02-18
- Inventor: Koichi Sakata , Shigenori Yaguchi , Toyoshi Sawada , Kimitoshi Yamaguchi , Hitoshi Iwatsuki , Hiroshi Tohmatsu , Hiroyuki Kishida , Toyoaki Tano , Mariko Takii
- Applicant: Koichi Sakata , Shigenori Yaguchi , Toyoshi Sawada , Kimitoshi Yamaguchi , Hitoshi Iwatsuki , Hiroshi Tohmatsu , Hiroyuki Kishida , Toyoaki Tano , Mariko Takii
- 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: JP2010-200967 20100908; JP2011-168170 20110801
- Main IPC: G03G9/00
- IPC: G03G9/00
Abstract:
A carrier including a magnetic core particle and a resin layer covering a surface of the magnetic core particle. The magnetic core particle is a ferrite particle including strontium in an amount of 0.005 to 3% by mass, measured by fluorescent X-ray spectroscopy. The resin layer comprises a resin obtained by heating a copolymer comprising a silicon-containing unit A and another silicon-containing specific unit B.
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