专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP5146185B2 Toner, developer and image forming method 有权
公开(公告)号：JP5146185B2
公开(公告)日：2013-02-20
申请号：JP2008200039
申请日：2008-08-01
申请人：株式会社リコー
发明人：茂江本 , 彰法斉藤
IPC分类号： G03G9/087 , G03G9/08
摘要： PROBLEM TO BE SOLVED: To provide a toner having excellent low temperature fixation performance and high-temperature resistant offset property, and forming an image having high quality, and also to provide a developer including this toner, and an image forming process by use of this toner. SOLUTION: This toner has base particles formed by dispersing a liquid prepared by dissolving or dispersing a material including a binder resin, a coloring agent, and a mold releasing agent in at least an organic solvent in an aqueous medium containing resin particles. The volumetric average particle diameter of the base particle measured by a coulter counter method is 3.0 μm or more and 6.0 μm or less. The binder resin includes: a first resin having glass transition temperature of 35°C or more and 55°C or less; and a second resin prepared by applying mechanical shearing force to the resin containing a component insoluble in THF. Mass.% of the second resin to the binder resin is 10% or more and 45% or less. COPYRIGHT: (C)2010,JPO&INPIT

2. 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

3. 发明专利

JP4541814B2 Toner and a method for producing the same, as well as, an image forming method 有权
公开(公告)号：JP4541814B2
公开(公告)日：2010-09-08
申请号：JP2004272510
申请日：2004-09-17
申请人：株式会社リコー
发明人：竜太井上 , 正啓大木 , 雅英山田 , 彰法斉藤 , 茂江本 , 真弘渡邊 , 千秋田中
IPC分类号： G03G9/087 , B01J19/00 , G03G9/08
CPC分类号： G03G9/0804 , G03G9/0806

4. 发明专利

JP4512509B2 Toner for electrostatic charge development 有权
公开(公告)号：JP4512509B2
公开(公告)日：2010-07-28
申请号：JP2005077811
申请日：2005-03-17
申请人：株式会社リコー
发明人：竜太井上 , 正啓大木 , 雅英山田 , 彰法斉藤 , 茂江本 , 真弘渡邊 , 千秋田中
IPC分类号： G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner which is used in developing an electrostatic latent image, such as an electrophotographic method, electrostatic recording method, electrostatic printing, method, and remarkably overcomes the problems of the prior art, and with which sufficient low-temperature fixability, establishment of a wide range of fixing temperatures, and a satisfactory fine-fineness image are obtained. SOLUTION: The electrostatic charge image developing toner is an electrophotographic toner composed of at least a binder resin, a colorant, and a release agent and is generated in an aqueous medium, in which the binder resin includes one or more hydrolyzable silyl group-containing polymer in the molecule. COPYRIGHT: (C)2006,JPO&NCIPI

5. 发明专利

JP4477647B2 Developing toner and process cartridge and image forming apparatus 有权
公开(公告)号：JP4477647B2
公开(公告)日：2010-06-09
申请号：JP2007036163
申请日：2007-02-16
申请人：株式会社リコー
发明人：正実冨田 , 浩明松田 , 茂江本
IPC分类号： G03G9/08 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide a toner free of sticking on a sleeve and on a development roller in one-component development, free of occurrence of an abnormal image such as image density unevenness or ground stain, and free of occurrence of such an abnormal image even in a high-speed machine, a process cartridge filled with the toner, and an image forming apparatus equipped with the process cartridge. SOLUTION: The toner is used in an image forming apparatus by an oilless fixing system using a one-component developer comprising a wax-containing toner, wherein a speed of a development roller is 25-85 cm/s, there are arranged a plurality of members for rubbing the toner on a surface of the development roller (except a photoreceptor), and an amount of the developer passing through the front of a development area is 0.06-0.40 g/(cm s). The toner has a volume average particle diameter (Dv) of 2-6 μm and a content of particles having a particle diameter of 0.6-2.0 μm in the toner is ≤25% by number. COPYRIGHT: (C)2007,JPO&INPIT

6. 发明专利

JP4401914B2 Toner and a method for producing the same, as well as, an image forming method 有权
公开(公告)号：JP4401914B2
公开(公告)日：2010-01-20
申请号：JP2004272508
申请日：2004-09-17
申请人：株式会社リコー
发明人：竜太井上 , 正啓大木 , 雅英山田 , 彰法斉藤 , 茂江本 , 真弘渡邊 , 千秋田中
IPC分类号： G03G9/087 , G03G9/08
摘要： PROBLEM TO BE SOLVED: To provide a spherical toner excellent in transferability, less liable to cause surface stain and filming, giving high image quality and having a small particle diameter and a narrow particle size distribution, and provide a method for efficiently manufacturing the toner and an image forming method using the toner by which high image quality can be achieved. SOLUTION: The method for manufacturing the toner includes at least a step of forming oil droplets by emulsifying or dispersing an oil phase in an aqueous phase, and a step of astringing the oil droplets, wherein the oil phase before the emulsification or dispersion in the aqueous phase exhibits non-Newtonian viscosity, and the oil droplets during the astringing exhibit Newtonian viscosity. Alternatively, the method for manufacturing the toner includes at least a step of forming oil droplets by emulsifying or dispersing an organic solvent-containing oil phase in an aqueous phase, and a step of removing the organic solvent from the oil droplets, wherein the oil phase before the emulsification or dispersion in the aqueous phase exhibits non-Newtonian viscosity, and the oil droplets during the removal of the organic solvent exhibit Newtonian viscosity. It is preferable that a Casson yield value at 25°C of the oil droplets during the astringing or the removal of the organic solvent is 0.05-2.0 Pa. COPYRIGHT: (C)2006,JPO&NCIPI

7. 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.

8. 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.

9. 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

10. 发明专利

JP4284005B2 Electrophotographic toner and a method of manufacturing the same 有权
标题翻译：空值
公开(公告)号：JP4284005B2
公开(公告)日：2009-06-24
申请号：JP2001103171
申请日：2001-04-02
申请人：株式会社リコー
发明人：正実冨田 , 裕士山下 , 恒心杉山 , 茂江本
IPC分类号： G03G9/087 , C08J3/14 , G03G9/08 , G03G9/09 , G03G15/01 , G03G15/08
CPC分类号： C08J3/14 , G03G9/0804 , G03G9/081 , G03G9/08711 , G03G9/08782
摘要： A toner composition including toner particles, wherein the toner particles are prepared by a method in which toner constituents including at least a binder resin and a colorant are kneaded upon application of heat to prepare a toner constituent mixture; the toner constituent mixture is dissolved or swelled in an organic solvent capable of dissolving or swelling at least the binder resin to prepare an oil phase liquid; the oil phase liquid is emulsified in an aqueous liquid to prepare an emulsion; the emulsion is coagulated; and then the coagulated emulsion is dried to prepare the toner particles.
摘要翻译：一种调色剂组合物，其包括调色剂颗粒，其中调色剂颗粒通过以下方法制备：其中包括至少粘合剂树脂和着色剂的调色剂组分在加热时进行捏合以制备调色剂组合物; 调色剂构成混合物溶解或溶胀至能够溶解或溶胀至少粘合剂树脂的有机溶剂中以制备油相液体; 将油相液体在水性液体中乳化，制备乳液; 乳液凝固; 然后将凝固的乳液干燥以制备调色剂颗粒。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式