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1. 发明专利

JP4859872B2 Image forming method and image forming apparatus 有权
公开(公告)号：JP4859872B2
公开(公告)日：2012-01-25
申请号：JP2008118205
申请日：2008-04-30
申请人：株式会社リコー
发明人：文浩佐々木 , 慎一郎八木 , 正実冨田 , 俊樹南谷 , 博山田 , 隆浩本多 , 博人樋口 , 茂江本 , 順一粟村 , 智美鈴木 , 直人霜田
IPC分类号： G03G9/08 , G03G9/087 , G03G15/20 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To provide toner for electrostatic charge image development, which copes with a low temperature fixing system while maintaining cleaning property on a photoreceptor after transfer, has excellent offset resistance and heat-resistant storage property and can of form an image of high quality. SOLUTION: The toner comprises at least a binder resin, a colorant and a release agent, and is characterized in that: the weight average particle diameter of the toner is from 3.0 to 6.0 μm, the shape factor SF-1:A of the toner and the proportion B (number%) of fine powder having a particle diameter of not more than 3 μm satisfy 8≤B≤14 when 155≤A≤180, and satisfy 8≤B≤0.6A-79 when 145 COPYRIGHT: (C)2009,JPO&INPIT

2. 发明专利

JP4567239B2 Color toner and a method of manufacturing the same for dry electrophotographic 有权
公开(公告)号：JP4567239B2
公开(公告)日：2010-10-20
申请号：JP2001191768
申请日：2001-06-25
申请人：株式会社リコー
发明人：寛之伏見 , 慎一郎八木 , 理内野倉 , 光輝加藤 , 俊樹南谷
IPC分类号： G03G9/09 , G03G9/087 , G03G9/097
摘要： PROBLEM TO BE SOLVED: To provide a dry electrophotographic color toner and a method for manufacturing the toner which does not cause filming on a photoreceptor, a regulating member for the thickness of a developer layer, a developing sleeve or the like even after the toner is used for continuous printing for a long time with a single-component or two-components color developing method, and which has excellent electrification characteristics and which can stably form images excellent in transparency, image density, picture quality or the like. SOLUTION: In the dry electrophotographic color toner containing at least a binder resin, an electrification controlling agent and a coloring agent, the binder resin is a polyester resin and/or a polyol resin containing no THF insoluble content, having

3. 发明专利

JP4472903B2 Electrophotographic toner, developer and image forming method 有权
公开(公告)号：JP4472903B2
公开(公告)日：2010-06-02
申请号：JP2001298895
申请日：2001-09-28
申请人：株式会社リコー
发明人：寛之伏見 , 慎一郎八木 , 理内野倉 , 光輝加藤 , 俊樹南谷
IPC分类号： G03G9/097 , G03G9/087 , G03G9/09 , G03G9/113
摘要： PROBLEM TO BE SOLVED: To provide electrophotographic toners by which a stable quantity of an electrostatic charge and amount of conveyance can be obtained and high- quality images can be obtained without impairing the advances of the electrophotographic toners even in long tern use when polyester or polyol is used as a binder resin of the above toners. SOLUTION: The electrophotographic toners contain the binder resin, coloring agents and negative charge control agent, in which the binder resin is the polyester or polyol and the negative charge control agent is the resin negative charge control agent composed of (1) a sulfonic acid-containing monomer, (2) an aromatic monomer having an electron-attractive group and (3) an acrylate monomer and/or methacrylate monomer as a structural unit. A substituted phenyl maleimide and substituted phenylitacon imide are more particularly preferable as (2) and n-butyl (metha)acrylate and 2-ethyl hexyl (metha)acrylate is preferable as (3).

4. 发明专利

JP4358574B2 Dry toner, an image forming method, and an image forming apparatus 有权
公开(公告)号：JP4358574B2
公开(公告)日：2009-11-04
申请号：JP2003287584
申请日：2003-08-06
申请人：株式会社リコー
发明人：文浩佐々木 , 慎一郎八木 , 正実冨田 , 俊樹南谷 , 智之市川 , 博人樋口 , 茂江本 , 唯雄滝川 , 麻衣子近藤 , 直人霜田
IPC分类号： G03G9/08 , G03G5/08 , G03G9/087 , G03G9/097 , G03G15/20
CPC分类号： G03G9/0825 , G03G9/08782 , G03G9/09708
摘要： A dry toner contains at least a toner binder, organic fine particles, a colorant, a wax, a charge control agent, and an external additive. The wax is concentrated in the vicinity of a toner core including the toner binder, colorant and wax. The organic fine particles adhere to the surface of the toner core to form a base toner-particle, the fine particle of charge control agent adhere to the surface of the base toner-particle, and the external additive is located on the surface thereof.

5. 发明专利

JP4300036B2 Toner and image forming apparatus 有权
公开(公告)号：JP4300036B2
公开(公告)日：2009-07-22
申请号：JP2003014045
申请日：2003-01-22
申请人：株式会社リコー
发明人：文浩佐々木 , 慎一郎八木 , 正実冨田 , 俊樹南谷 , 博人樋口 , 茂江本 , 真弘渡邊 , 唯雄滝川
IPC分类号： G03G9/08 , G03G5/08 , G03G9/087 , G03G15/08 , G03G15/20
CPC分类号： G03G9/08797 , G03G9/0825 , G03G9/08782
摘要： The present invention is directed to a toner for electrophotography that exhibits excellent hot offset resistance, storability, and glossiness and can obtain a high image-resolution and highly detailed images when used for energy saving apparatuses or as a color toner. The present invention is also directed to a developer, image-forming apparatus, and process cartridge containing such toner, and image-forming process using such toner. The toner of the present invention contains a resin and wax. The wax is dispersed within the resin in a shaped of fine particles to form a toner particle. In the toner particle, more dispersed wax particles are existed in a surface portion of the toner particle than a centric portion of the toner particle.

6. 发明专利

JP4298966B2 Toner for developing an electrostatic latent image 有权
标题翻译：空值
公开(公告)号：JP4298966B2
公开(公告)日：2009-07-22
申请号：JP2002160694
申请日：2002-05-31
申请人：株式会社リコー
发明人：慎一郎八木 , 正実冨田 , 俊樹南谷 , 裕士山下 , 博山田 , 恒心杉山 , 茂江本 , 真弘渡邊 , 唯雄滝川
IPC分类号： G03G9/08 , G03G9/087 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide toners which are excellent in micro-dot reproducibility, deals with a low-temperature fixing system, has a good offset resistance and does not contaminate a fixing device and images. SOLUTION: The toners consist of at least a binder resin, coloring agents and resin particulates and are characterized in that the ratio Dv/Dn of the volume mean particle diameter (Dv) and number mean particle diameter (Dn) of the toners is 1.00 to 1.40; the glass transition temperature (Tg) of the resin particulates is 50 to 90°C and the coverage of the resin particulates existing on the surfaces of the toner particles ranges from 1 to 90%. COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：为了提供微点再现性优异的调色剂，处理低温定影系统，具有良好的抗偏移性，并且不会污染定影装置和图像。调色剂由至少粘合剂树脂，着色剂和树脂颗粒组成，其特征在于，调色剂的体积平均粒径（Dv）和数均粒径（Dn）的比Dv / Dn 为1.00〜1.40; 树脂微粒的玻璃化转变温度（Tg）为50〜90℃，存在于调色剂颗粒表面的树脂微粒的覆盖率为1〜90％。版权所有（C）2003，JPO

7. 发明专利

JP4056377B2 Toner for developing an electrostatic latent image 有权
公开(公告)号：JP4056377B2
公开(公告)日：2008-03-05
申请号：JP2002364426
申请日：2002-12-16
申请人：株式会社リコー
发明人：文浩佐々木 , 慎一郎八木 , 正実冨田 , 俊樹南谷 , 智之市川 , 博人樋口 , 茂江本 , 唯雄滝川 , 麻衣子近藤 , 直人霜田
IPC分类号： G03G9/08 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide toner for electrostatic charge image development having excellent reproducing property of thin lines, keeping excellent cleaning property for a long time, and having excellent low temperature fixing property, offset resistance and filming resistance, and to provide a developer, a developing method, a toner container and a developing apparatus using the above toner. SOLUTION: The toner for electrostatic charge image development comprises at least a binder resin and a coloring agent and is to be used for an electrostatic charge image developing apparatus having a means for cleaning by touching the toner not transferred but remaining on at least an electrostatic charge image carrying body. The volume average particle size (Dv) of the toner is 4 to 8 μm. The proportion of toner particles having ≤2 μm diameter in terms of circles measured by a flow type particle image analyzer is ≤25 number%. The distribution of circularity in number satisfies A COPYRIGHT: (C)2004,JPO&NCIPI

8. 发明专利

JP4052575B2 Method of manufacturing a toner for electrophotography 有权
公开(公告)号：JP4052575B2
公开(公告)日：2008-02-27
申请号：JP2003012974
申请日：2003-01-22
申请人：株式会社リコー
发明人：文浩佐々木 , 慎一郎八木 , 正実冨田 , 俊樹南谷 , 隆浩本多 , 博人樋口 , 茂江本 , 唯雄滝川 , 順一粟村 , 麻衣子近藤 , 直人霜田
IPC分类号： G03G9/08 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic toner excellent in durability and fixable at low temperature and to provide a manufacturing method. SOLUTION: The toner is obtained by dissolving or dispersing a resin powder composition containing a modified polyester resin capable of reacting with a compound having an active hydrogen group in an organic solvent, dispersing the resulting solution or dispersion in an aqueous medium containing fine resin particles, reacting it with a cross-linking agent and/or an extender, and removing the solvent from the resulting dispersion. The toner particles have an average circularity of ≤0.95 measured with a flow type particle image analyzing apparatus. The toner comprises a resin powder B obtained by adding an electrostatic charge controlling agent and inorganic fine particles to a resin powder A in which a content ratio of particles of ≤3 μm is ≤15% and by fixing the electrostatic charge controlling agent on the resin powder A with a fluidized stirring type mixer, wherein the resin powder B satisfies the expression (1): b/a≤1.3, wherein a and b are respective contents of particles of ≤3 μm in the resin powders A and B. COPYRIGHT: (C)2004,JPO&NCIPI

9. 发明专利

JP3831395B2 Toner container 有权
公开(公告)号：JP3831395B2
公开(公告)日：2006-10-11
申请号：JP2004356900
申请日：2004-12-09
申请人：株式会社リコー
发明人：慎一郎八木 , 正実冨田 , 俊樹南谷 , 裕士山下 , 博山田 , 恒心杉山 , 茂江本 , 真弘渡邊 , 唯雄滝川
IPC分类号： G03G9/08 , G03G9/087 , B65D83/06
摘要： PROBLEM TO BE SOLVED: To provide a toner-containing toner container in which the toner is housed and which deals with a low temperature fixing system while maintaining cleaning property, has good offset resistance and does not contaminate a fixing device and an image. SOLUTION: The electrostatic charge image developing toner is obtained by; dissolving or dispersing a toner composition containing a toner binder composed of a denatured polyester base resin reactable with active hydrogen into an organic solvent to form a dissolved or dispersed material; reacting the dissolved or dispersed material with a crosslinking agent and/or extending agent in an aqueous medium containing resin particulates capable of forming an aqueous dispersing element; removing the solvent from the obtained dispersed liquid; and subjecting the resin particulates sticking to the toner surface to cleaning/desorbing. The toner-containing toner container consists of the above toner of ≤2.5wt% in the residual ratio of the resin particulates remaining on the toner particle surface measured by a pyrolysis gas chromatograph mass spectrometer (mass spectrometry) to the resin particulates with respect to the toner particles, and a container housing the toner. COPYRIGHT: (C)2005,JPO&NCIPI

10. 发明专利

JP3359657B2 Toner for electrophotography 失效
公开(公告)号：JP3359657B2
公开(公告)日：2002-12-24
申请号：JP12966692
申请日：1992-04-22
申请人：株式会社リコー
发明人：文浩佐々木 , 正実冨田 , 俊樹南谷 , 康敬岩本 , 千春望月 , 正則鈴木
IPC分类号： G03G9/087 , G03G9/08 , G03G9/09 , G03G9/097 , G03G9/113
摘要： PURPOSE:To enhance offset resistance and reduce fixing temperature by containing a polyester resin obtained by condensation polymerization of a specified diol component with an acid component containing a trivalent carboxylic acid and a trimellitic acid therein. CONSTITUTION:A binder resin is a polyester resin obtained by condensing a diol component represented by a formula I with an acid component containing 1-50 mole % of a divalent carboxylic acid or its anhydride represented by a formula II and 10-30 mole % of a trimellitic acid or its anhydride, as a compound selected from the group consisting of dixzalent or more polyhydric carboxylic acids, and acid anhydrides and lower alkyl esters thereof. A releasing agent is a wax selected from the group consisting of free fatty acid eliminated type carnauba waxes, montan ester waxes and acid value rice waxes having acid values of 10-30. In the formulae I and II, R represents an alkylene group, X and Y each represent an integral number in which the average value of the sum is 2-16, R represents a hydrocarbon group having 4-20 carbons, and R has the same meaning as R , or represents hydrogen.

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