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21. 发明专利

JP2012103573A Toner for electrostatic charge image development, and image forming apparatus 有权
标题翻译：静电充电图像发展用的调色剂和图像形成装置
公开(公告)号：JP2012103573A
公开(公告)日：2012-05-31
申请号：JP2010253489
申请日：2010-11-12
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOJIMA TOMOYUKI , HONDA TAKAHIRO , SATO SACHIKO , UCHINOKURA OSAMU , AWAMURA JUNICHI , OGAWA SATORU , KUSAHARA TERUKI , ITO DAISUKE , INOUE DAISUKE , SATO YUKIFUMI , YOSHIDA RYUTA
IPC分类号： G03G9/08 , G03G9/087 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus and a toner having excellent low-temperature fixability, causing no toner aggregation even in a high humidity environment, capable of securing charging stability, suppressing filming and preventing image degradation.SOLUTION: The image forming apparatus includes charging means, exposing means, developing means, transfer means, fixing means and cleaning means, in which a toner used for forming an image is produced by an aqueous granulation process. The toner contains silica fine particles as an additive on a surface of a toner base, and the silica comprises porous silica fine particles having fine pores on the surface thereof. A coverage area ratio of the porous silica fine particles with respect to the toner base area is 5 to 20%. The porous silica fine particles have an average primary particle diameter of 20 to 200 nm, an absolute specific gravity of 2.0 g/cmor less, and a specific surface area of 20 to 500 m/g.
摘要翻译：要解决的问题：为了提供具有优异的低温定影性的图像形成装置和调色剂，即使在高湿度环境下也不会引起调色剂聚集，能够确保充电稳定性，抑制成膜和防止图像劣化。解决方案：图像形成装置包括充电装置，曝光装置，显影装置，转印装置，固定装置和清洁装置，其中通过水性造粒方法产生用于形成图像的调色剂。调色剂在调色剂基材的表面上含有二氧化硅微粒作为添加剂，二氧化硅包括其表面上具有细孔的多孔二氧化硅细颗粒。多孔二氧化硅微粒相对于调色剂基底面积的覆盖面积比为5〜20％。多孔二氧化硅微粒的平均一次粒径为20〜200nm，绝对比重为2.0g / cm 3以下，比表面积为20〜 500米 2 / g。版权所有（C）2012，JPO＆INPIT

22. 发明专利

JP2012083712A Image forming apparatus and toner for electrostatic charge image development 审中-公开
标题翻译：图像形成装置和调色剂用于静电电荷图像开发
公开(公告)号：JP2012083712A
公开(公告)日：2012-04-26
申请号：JP2011171810
申请日：2011-08-05
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOJIMA TOMOYUKI , SATO SACHIKO , UCHINOKURA OSAMU , OGAWA SATORU , AWAMURA JUNICHI , SUGIMOTO TSUTOMU , KUSAHARA TERUKI , ITO DAISUKE , INOUE DAISUKE , HOZUMI MAMORU , SATO YUKIFUMI
IPC分类号： G03G9/08 , G03G9/087
CPC分类号： G03G9/0819 , G03G9/0804 , G03G9/08755 , G03G9/08795 , G03G9/08797 , G03G9/097 , G03G9/09708 , G03G9/09716 , G03G9/09725
摘要： PROBLEM TO BE SOLVED: To provide a toner containing crystalline polyester and having anti-filming property and anti-spent property to a carrier, having stable low-temperature fixability, high temperature offset resistance and heat-resistant storage property, and to provide an image forming apparatus mounting the toner.SOLUTION: The toner has a volume average particle diameter (Dv) of 4.0 to 6.0 μm, obtained by dispersing an oil phase, which comprises at least one of a crystalline polyester resin and an amorphous polyester resin as a binder resin component included in an organic solvent, into an aqueous medium, and then removing the organic solvent from the obtained dispersion liquid. The toner contains at least two kinds of additives on the surface thereof, in which an additive (A) having the maximum average primary particle diameter in the additives has a coverage CA expressed by formula (A) in the range from 5% to 10%, and an additive (B) having the minimum average primary particle diameter in the additives has a coverage CB expressed by formula (B) in the range from 45% to 100%.
摘要翻译：要解决的问题：为了提供含有结晶聚酯的调色剂，并且具有抗载体性和抗废弃性能，具有稳定的低温定影性，耐高温粘合性和耐热保存性，并且提供安装调色剂的图像形成装置。解决方案：调色剂的体积平均粒径（Dv）为4.0至6.0μm，通过分散包含结晶聚酯树脂和非晶形聚酯树脂中的至少一种的油相获得，其包含作为粘合剂树脂组分在有机溶剂中进入水性介质，然后从得到的分散液中除去有机溶剂。调色剂在其表面上含有至少两种添加剂，其中添加剂中具有最大平均一次粒径的添加剂（A）具有由式（A）表示的覆盖率为5％至10％的范围，，并且添加剂中具有最小平均一次粒径的添加剂（B）具有由式（B）表示的覆盖率CB在45％至100％的范围内。版权所有（C）2012，JPO＆INPIT

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