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61. 发明专利

JP4602880B2 The toner, and a developer, toner container, process cartridge, image forming apparatus and image forming method 有权
公开(公告)号：JP4602880B2
公开(公告)日：2010-12-22
申请号：JP2005270307
申请日：2005-09-16
申请人：株式会社リコー
发明人：慎也中山 , 久志中島 , 文浩佐々木 , 理内野倉 , 宏一坂田 , 昭宏小番 , 裕士山下 , 智之市川 , 拓也斉藤 , 賢望月 , 安雄朝比奈 , 英樹杉浦 , 園生松岡 , 博人樋口 , 雅之石井 , 庸泰長友
IPC分类号： G03G9/08 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide a toner that can maintain sufficient transferability and cleaning ability for prolonged periods, prevent filming without causing variation in image nonuniformity or external additive immersion, and excels in stability so that flowability and charge stability are not changed over prolonged periods; and also to provide a developer, a toner container, a process cartridge, an image forming apparatus, and an image forming method. SOLUTION: The toner comprises at least external additives, in which the external additives consist of large-diameter particles and small-diameter particles of the volume average grain size smaller than that of the large-diameter particles. The number of pieces of the aggregates of the external additives left on the sieve of 635-mesh and 452 cm 2 of mesh area, after 0.2 g of the toner on the sieve is blasted with air at a blow pressure of 0.2 MPa from 160 mm above the sieve while being air-suctioned at a suction force of 5 mmHg, and then air-suctioned at a suction force of 20 mmHg, is 5 to 4,500. COPYRIGHT: (C)2007,JPO&INPIT

62. 发明专利

JP4512995B2 Image forming method 有权
公开(公告)号：JP4512995B2
公开(公告)日：2010-07-28
申请号：JP2004250110
申请日：2004-08-30
申请人：株式会社リコー
发明人：慎也中山 , 久志中島 , 知子内海 , 理内野倉 , 宏一坂田 , 昭宏小番 , 康敬岩本 , 仁岩附 , 智之市川 , 賢望月 , 安雄朝比奈 , 英樹杉浦 , 雅之石井
IPC分类号： G03G9/097 , G03G9/08 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide an image forming method in which good offset resistance is achieved, a fixing device and an image are not stained and excellent charging characteristics are ensured, and by which an image with few surface stains is formed, and also to provide a toner for electrostatic image development, a developer, and a process cartridge. SOLUTION: In the image forming method, a fixing device is used which has a heating roller 1 heated by electromagnetic induction, a fixing roller 2, a toner heating medium 3 and a pressure roller 4 forming a fixing nip part N, and a toner is used which is obtained by dissolving or dispersing a toner composition in an organic solvent, dispersing the resulting solution or dispersion in an aqueous medium containing fine resin particles, reacting it with a crosslinking agent, removing the solvent from the resulting dispersion to form particles, and treating the surfaces of the particles with a fluorine-containing compound, wherein a content of F in the toner detected by the XPS method is 2-30% by the number of atoms, and a content of fine resin particles is 0.5-5.0 mass%. The toner for electrostatic image development, the developer, and the process cartridge are also provided. COPYRIGHT: (C)2006,JPO&NCIPI

63. 发明专利

JP4434533B2 An electrostatic latent image developing carrier 有权
公开(公告)号：JP4434533B2
公开(公告)日：2010-03-17
申请号：JP2001290297
申请日：2001-09-25
申请人：株式会社リコー
发明人：昭宏小番 , 公利山口
IPC分类号： G03G9/10 , G03G9/113
摘要： PROBLEM TO BE SOLVED: To provide a developer which prevents color contamination caused by the wear of the carrier during development and with time and which can give an image having excellent color reproducibility, excellent reproducibility of a highlight part and high resolution. SOLUTION: The electrostatic latent image developing carrier is obtained by forming a coating film on the surfaces of magnetic particles. The coating film contains conductive inorganic fine particles and a constant k defined by k[nm ]=(m +1)/r2×d×(m -1), wherein m=r1/r2, with respect to the refractive index r1 and the particle size d of the inorganic fine particles and to the refractive index r2 of the coating film, is >=0.015 nm .

64. 发明专利

JP4299197B2 Method of manufacturing a toner for developing an electrostatic charge image 有权
公开(公告)号：JP4299197B2
公开(公告)日：2009-07-22
申请号：JP2004192697
申请日：2004-06-30
申请人：株式会社リコー
发明人：慎也中山 , 久志中島 , 理内野倉 , 宏一坂田 , 昭宏小番 , 康敬岩本 , 仁岩附 , 智之市川 , 拓也斉藤 , 賢望月 , 安雄朝比奈 , 英樹杉浦
IPC分类号： G03G9/087 , G03G9/08
摘要： PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner and a developer having a stabilized particle size distribution of the toner, adaptable to a low-temperature fixing system, exhibiting proper offset resistance, staining neither fixing means not image, and capable of forming stable images, and to provide an electrophotographic system image forming apparatus and a process cartridge that use the developer. SOLUTION: The electrostatic charge image developing toner is includes processes where; an organic solvent phase in which at least a functional group-containing polyester resin has been dissolved, an active hydrogen-containing compound and a colorant are dispersed in an aqueous medium phase, in which resin fine particles have been dissolved, the functional group-containing polyester resin and the active hydrogen-containing compound are brought into an extension reaction and/or a crosslinking reaction, and particles are formed from the resulting dispersion, wherein an organic acid compound is contained in the organic solvent phase. COPYRIGHT: (C)2006,JPO&NCIPI

65. 发明专利

JP4208119B2 Developing method 有权
标题翻译：空值
公开(公告)号：JP4208119B2
公开(公告)日：2009-01-14
申请号：JP2003001439
申请日：2003-01-07
申请人：株式会社リコー
发明人：直樹今橋 , 昭宏小番 , 公利山口 , 宏明高橋
IPC分类号： G03G9/08 , G03G9/107 , G03G9/10 , G03G9/113 , G03G15/06 , G03G15/08 , G03G15/09
摘要： PROBLEM TO BE SOLVED: To provide a developing method capable of supplying a stable solid image developing ability against the electric resistance fluctuation of a carrier, and also, capable of obtaining good image quality. SOLUTION: The packing density of developer at the closest part between a photoreceptor 2 and a developing sleeve 1 is set to 1.3 to 2.0 g/cm 3 , a developing nip width where the photoreceptor 2 comes into contact with a magnetic brush is set to be ≤2 mm, and also, the carrier contained in the developer is constituted of a magnetic core particle and a resin layer coating the particle surface, the average weight particle diameter of the carrier is set to be 25 to 45 μm, and the particles having the particle diameter of COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种能够抵抗载体的电阻波动提供稳定的固体图像显影能力的显影方法，并且还能够获得良好的图像质量。解决方案：感光体2和显影套筒1之间最靠近的部分的显影剂的包装密度设定为1.3-2.0g / cm 3 / SP>，感光体2到达的显影夹持宽度与磁刷接触设定为≤2mm，包含在显影剂中的载体也由磁芯颗粒和涂覆颗粒表面的树脂层构成，载体的平均重量粒径设定为为25〜45μm，粒径<44μm的粒子为≥60重量份。将粒径<22μm的粒子设定为7重量份。在承运人版权所有（C）2003，JPO

66. 发明专利

JP4121252B2 Electrostatic latent image carrier, a developer and a development method using the developing device 有权
标题翻译：空值
公开(公告)号：JP4121252B2
公开(公告)日：2008-07-23
申请号：JP2001089421
申请日：2001-03-27
申请人：株式会社リコー
发明人：光輝加藤 , 昭宏小番 , 昌秀山下 , 陽一郎渡辺 , 豊志澤田 , 桂子白石 , 政則鈴木
IPC分类号： G03G9/113 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a carrier which does not change the picture quality even for long-term use, a developer which uses the carrier, and a method for developing and a developing device which use the developer so that reproducibility for thin lines and uniform reproduction of dots with a small diameter can be obtained and excellent resolution is realized. SOLUTION: The carrier has an outer shell layer formed in the form of coating a spheric particle having magnetism, with the outer shell layer having recesses and projections based on the fine particles included in the layer. Moreover, the outermost surface of the carrier is coated with a silicone resin film. The carrier is specified that the average height difference in the recesses and projections is 0.1 to 2.0 μm, that the proportion n/Sc of the number n of the projections to the surface area Sc calculated from the carrier particle size is >=1.0 [μm ], or that the fine particles consist of metal oxides or the like.
摘要翻译：要解决的问题：为了提供即使长期使用也不改变图像质量的载体，使用载体的显影剂，以及使用显影剂的显影剂和显影装置的方法，使得细线的再现性和可以获得具有小直径的点的均匀再现，并且实现了优异的分辨率。解决方案：载体具有形成为涂覆具有磁性的球形颗粒形式的外壳层，外壳层具有基于包含在该层中的细小颗粒的凹凸。此外，载体的最外表面涂覆有硅树脂膜。规定了载体的凹凸部的平均高差为0.1〜2.0μm，从载体粒径计算出的与表面积Sc相关的突起数n的比例n / Sc为> 1.0 [μm] <-3>]，或者细颗粒由金属氧化物等组成。

67. 发明专利

JP4105650B2 Toner, developer, developing apparatus, the image forming apparatus 有权
公开(公告)号：JP4105650B2
公开(公告)日：2008-06-25
申请号：JP2004073823
申请日：2004-03-16
申请人：株式会社リコー
发明人：慎也中山 , 久志中島 , 理内野倉 , 正実冨田 , 宏一坂田 , 昭宏小番 , 康敬岩本 , 智之市川 , 賢望月 , 安雄朝比奈 , 英樹杉浦
IPC分类号： G03G9/08 , G03G9/097 , G03G9/087
CPC分类号： G03G9/08755 , G03G9/08764 , G03G9/08766 , G03G9/08793 , G03G9/08795
摘要： A toner which is negatively charged to develop an electrostatic latent image is provided that contains a colorant; and a binder resin, wherein the toner has an acid value of from 5 to 20 mg KOH/g and an amine value of from 0.5 to 10 mg KOH/g.

68. 发明专利

JP4089893B2 For developing an electrostatic latent image carrier, the developer, and the process cartridge 有权
公开(公告)号：JP4089893B2
公开(公告)日：2008-05-28
申请号：JP2003204232
申请日：2003-07-31
申请人：株式会社リコー
发明人：直樹今橋 , 昭宏小番 , 公利山口 , 元治田中 , 宏明高橋
IPC分类号： G03G9/08 , G03G9/113 , G03G9/10
摘要： PROBLEM TO BE SOLVED: To provide a carrier which has stable charge imparting ability over a prolonged period of time, is excellent in wear resistance of a film, is free from a change in charge due to spent of a toner composition, can quickly impart charges to toner in agitation of a developer by providing fine irregularity to the surface shape of the film, has suppressed variations in charging property according to the environment and a reduction in a charge amount with time, and prevents the occurrence of defects such as a change of image density, surface stain and in-machine contamination by toner in various service environments. SOLUTION: The carrier has at least two coating layers, wherein a surface layer forming the top surface contains a condensate of at least an N-alkoxyalkylated polyamide and a silicone resin having a silanol group and/or an alkoxy group, and the carrier has an intermediate layer comprising a resin containing fine particles between a core material and the surface layer. COPYRIGHT: (C)2005,JPO&NCIPI

69. 发明专利

JP3928946B2 Electrostatic latent image carrier, a method of manufacturing an electrostatic latent image developing carrier, an electrostatic latent image developer and a process cartridge 有权
公开(公告)号：JP3928946B2
公开(公告)日：2007-06-13
申请号：JP2002267993
申请日：2002-09-13
申请人：株式会社リコー
发明人：直樹今橋 , 昭宏小番 , 公利山口 , 元治田中 , 宏明高橋
IPC分类号： G03G9/113
摘要： PROBLEM TO BE SOLVED: To provide a carrier for an electrostatic latent image free of deterioration of color characteristics such as color muddiness and excellent in reliability. SOLUTION: The carrier for electrostatic latent image development coated with a condensate of a mixture of a silanol-condensable silicone and an alkoxyalkylated polyamide and containing a conductive agent dispersed in the coating layer has a skimming transmittance of ≥85%. Preferably the conductive agent dispersed in the coating layer is carbon black and the coating layer is fired at 160-250°C. COPYRIGHT: (C)2004,JPO

70. 发明专利

JP3922709B2 Developing an electrostatic latent image carrier, an electrostatic latent image developer, and process cartridge 有权
公开(公告)号：JP3922709B2
公开(公告)日：2007-05-30
申请号：JP2003082136
申请日：2003-03-25
申请人：株式会社リコー
发明人：直樹今橋 , 昭宏小番 , 公利山口 , 元治田中 , 宏明高橋
IPC分类号： G03G9/10 , G03G9/113
摘要： PROBLEM TO BE SOLVED: To provide a carrier for electrostatic latent image development which has a stable charge-imparting performance over a long period, has excellent abrasion resistance of a covering layer and adhesiveness between fine particles having magnetism and the covering layer, has high product yield of the coated carrier and does not cause charge fluctuation due to a spent toner composition, to provide a carrier for electrostatic latent image development capable of suppressing the charge fluctuation due to environmental conditions and the shelf deterioration of charge quantity and obtaining a good quality of picture without a failure such as the fluctuation of picture density, surface staining and contamination in machine due to the toner even in various kinds of use environments and, further, to provide a developer for electrostatic latent image and a process cartridge using the carrier for electrostatic latent image development. SOLUTION: The carrier for electrostatic latent image development has a covering layer on the surface of core material having magnetism and the covering layer comprises N-alkoxyalkyl polyamide (1), one kind or more resins capable of reacting with the N-alkoxyalkyl polyamide resin containing silicone which has at least a silanol group and/or a hydrolyzable group and a condensation product obtained from a mixture of an aminosilane coupling agent. COPYRIGHT: (C)2005,JPO&NCIPI

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