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公开(公告)号：JP2007316166A
公开(公告)日：2007-12-06
申请号：JP2006143375
申请日：2006-05-23
Applicant: Sharp Corp , シャープ株式会社
Inventor： KATO TAKESHI , ISHIDA TOSHINAO , SAWAI MASAYUKI , KOREMATSU KAZUYA , TAKAYAMA TAKESHI , NAKATSU KIYOBUMI
IPC: G03G9/113
Abstract: PROBLEM TO BE SOLVED: To provide a carrier and two-component developer having excellent durability and environmental stability.
SOLUTION: The carrier comprises a core material coated with a coating resin, wherein the coating resin is applied ≥5 wt.% and ≤20 wt.% with respect to the weight of the core material on the core material so as to improve the durability. Further, the coating resin contains alumina fine powder, which improves environmental stability.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 要解决的问题：提供具有优异的耐久性和环境稳定性的载体和双组分显影剂。 载体包括涂覆有涂层树脂的芯材，其中涂层树脂相对于芯材料上的芯材的重量施加≥5重量％和≤20重量％，以便 提高耐久性。 此外，涂料树脂含有氧化铝细粉，其改善了环境稳定性。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2005148405A
公开(公告)日：2005-06-09
申请号：JP2003385770
申请日：2003-11-14
Applicant: Sharp Corp , シャープ株式会社
Inventor： KOREMATSU KAZUYA , ISHIDA TOSHINAO , SAWAI MASAYUKI , KIDA YASUSHI , SEKI MASAHIRO , NISHIKAWA TORU
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic toner capable of suppressing fogging and preventing filming even after long-term use. SOLUTION: The electrophotographic toner 1 is obtained by locating fine strontium titanate particles 3 and hydrophobic inorganic fine particles 4 whose average particle diameter is 1/10 to 1/3 of that of the fine strontium titanate particles on toner base particles 2 comprising at least a release agent, a colorant and a binder resin and having an average particle diameter of ≤10 μm. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：提供即使在长期使用后能够抑制起雾和防止成膜的电子照相调色剂。 解决方案：电子照相调色剂1通过将细钛酸锶颗粒3和平均粒径为细钛酸锶钛颗粒颗粒的1/10的1/10的疏水性无机细颗粒4定位在调色剂基础颗粒2上而获得， 至少一种脱模剂，着色剂和粘合剂树脂，并且具有≤10μm的平均粒径。 版权所有（C）2005，JPO＆NCIPI
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公开(公告)号：JP2003066647A
公开(公告)日：2003-03-05
申请号：JP2001257600
申请日：2001-08-28
Applicant: Sharp Corp , シャープ株式会社
Inventor： SUGIMURA HIROSHI , KADOI MIKIO , TANAKA YUJI , HASHIMOTO MASAKI , ISHIDA TOSHINAO , MATSUMOTO MASANORI
Abstract: PROBLEM TO BE SOLVED: To provide a method for forming an image with practically sufficient electric and mechanical performances and high durability. SOLUTION: In the method for forming an image by electrifying the surface of an electrophotographic photoreceptor to form an electrostatic latent image and then developing and transferring the electrostatic latent image to form an image, the photosensitive layer of the electrophotographic photoreceptor used contains a polymer compound having the structural unit expressed by general formula (1). The electrostatic charge image formed on the electrophotographic photoreceptor is developed and visualized by using a toner prepared by externally adding an irregular magnetic material particles to color particles composed of at least a binder resin and a coloring agent. In formula (1), each of R , R , R , R , R , R , R and R represents a hydrogen atom, halogen atom, 1-6C alkyl group which may have substituents, 4-10C cyclic hydrocarbon group which may have substituents or aryl group which may have substituents.
Abstract translation: 要解决的问题：提供一种以实际上足够的电气和机械性能以及高耐久性形成图像的方法。 解决方案：在通过使电子照相感光体的表面带电以形成静电潜像，然后显影和转印静电潜像以形成图像的图像形成方法中，所使用的电子照相感光体的感光层含有具有 由通式（1）表示的结构单元。 通过使用通过向由至少粘合剂树脂和着色剂构成的着色颗粒外部添加不规则磁性材料颗粒而制备的调色剂来显影形成在电子照相感光体上的静电电荷图像。 在式（1）中，R 1，R 2，R 3，R 4，R 5，R 6，R 7和R 8各自表示氢 原子，卤素原子，可具有取代基的1-6C烷基，可具有取代基的4-10C环状烃基或可具有取代基的芳基。
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公开(公告)号：JP2004163710A
公开(公告)日：2004-06-10
申请号：JP2002330351
申请日：2002-11-14
Applicant: Sharp Corp , シャープ株式会社
Inventor： NAGAI TAKAFUMI , SAWAI MASAYUKI , ISHIDA TOSHINAO , KIDA YASUSHI , KOREMATSU KAZUYA , NISHIKAWA TORU , KOJIMA YOSHIMI
CPC classification number: G03G9/097 , G03G9/0821
Abstract: PROBLEM TO BE SOLVED: To provide a nonmagnetic monocomponent toner giving stable image quality in a long-term use. SOLUTION: In the nonmagnetic monocomponent toner consisting of colored particles comprising at least a binder resin, a colorant and a wax and at least one external additive, an external additive having an average particle diameter, the relation of which with the Vickers hardness of the colored particles is within a prescribed range, is used. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP2004109200A
公开(公告)日：2004-04-08
申请号：JP2002268410
申请日：2002-09-13
Applicant: Sharp Corp , シャープ株式会社
Inventor： KOREMATSU KAZUYA , ISHIDA TOSHINAO , SAWAI MASAYUKI , KIDA YASUSHI
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic nonmagnetic single component toner having a sufficient non-offset band in oil-less fixing and showing a good state of uniformity in an image, fog and image density. SOLUTION: The nonmagnetic single component toner comprises at least a polyester resin, a coloring pigment and a release agent. The toner has 105 to 130°C softening point, 5.5 to 10.5 μm volume average particle size and 70 to 210% coating rate of fine particles externally added to the toner base particles. COPYRIGHT: (C)2004,JPO
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Patent Agency Ranking
公开(公告)号：JP2005258331A
公开(公告)日：2005-09-22
申请号：JP2004073191
申请日：2004-03-15
Applicant: Sharp Corp , シャープ株式会社
Inventor： NISHIKAWA TORU , ISHIDA TOSHINAO , SAWAI MASAYUKI , KIDA YASUSHI , SEKI MASAHIRO , KOREMATSU KAZUYA
Abstract: PROBLEM TO BE SOLVED: To provide a nonmagnetic single component developing apparatus free from problems image defects such as fading caused by the material of a supply roller or from problems such as toner filming on a developing roller, toner deterioration and wear of a supply roller, and capable of forming a high picture quality image having no image failure for an extremely long time. SOLUTION: The nonmagnetic single component developing apparatus comprises a developing roller 4, a supply roller 5, a regulating blade 6, a developing tank 7, and an impeller 8. The developing roller 4 has 45° to 65° spring hardness Hs (A) as the surface hardness. The ratio (Sb/Sa) of the peripheral speed Sb of the supply roller 5 to the peripheral speed Sa of the developing roller 4 is specified to 0.4 to 1.0. The supply roller 5 comprises a continuous closed-cell foam of a rubber material having 300 to 500 μm cell diameter. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：提供一种非磁性单一成分显影装置，不存在由供给辊的材料引起的褪色等图像缺陷或显影辊上的调色剂成膜等问题，调色剂劣化和磨损等问题 并且能够在非常长的时间内形成没有图像故障的高画质图像。 解决方案：非磁性单组分显影装置包括显影辊4，供给辊5，调节刮板6，显影槽7和叶轮8.显影辊4具有45°至65°的弹簧硬度Hs （A）作为表面硬度。 供给辊5的圆周速度Sb与显影辊4的圆周速度Sa的比（Sb / Sa）规定为0.4〜1.0。 供应辊5包括具有300至500μm单元直径的橡胶材料的连续闭孔泡沫。 版权所有（C）2005，JPO＆NCIPI
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公开(公告)号：JP2004086005A
公开(公告)日：2004-03-18
申请号：JP2002248760
申请日：2002-08-28
Applicant: Sharp Corp , シャープ株式会社
Inventor： KIDA YASUSHI , ISHIDA TOSHINAO , SAWAI MASAYUKI , KOREMATSU KAZUYA
Abstract: PROBLEM TO BE SOLVED: To provide a nonmagnetic monocomponent toner which has sufficient flow properties and developability and can sufficiently satisfy low-temperature fixability and high-temperature offset resistance in an oilless fixing roller. SOLUTION: The toner consists of at least a polyester resin, coloring pigments and a releasing agent. The toner resin composition is ≤10% tetrahydrofuran (THF) insoluble content, is 3,000 to 5,000 in the number average molecular weight Mn by a gel permeation chromatography (GPC) of a THF soluble content, is 30,000 to 90,000 in weight average molecular weight Mw, is 10.0 to 25.0 in dispersion ratio (Mw/Mn) and is specified in external additive coverage by inorganic particulate to 70 to 210%. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JPH11272009A
公开(公告)日：1999-10-08
申请号：JP7531398
申请日：1998-03-24
Applicant: Sharp Corp , シャープ株式会社
Inventor： IMAFUKU TATSUO , ISHIDA TOSHINAO , URATA YOSHITAKA , BITO TAKAHIRO , HONDA YOKO
CPC classification number: G03G9/08795 , G03G9/08797 , G03G9/0906
Abstract: PROBLEM TO BE SOLVED: To obtain a toner having good electrification property and narrow electrification distribution, and thereby stabilizes fog and image density.
SOLUTION: This electrophotographic toner essentially consists of a binder resin having ≤ 1.0 mKOH/g acid value and contains a coloring agent of ≥7.0 pH which is not subjected to surface oxidation treatment. The binder resin contains a low mol.wt. polypropylene as an inner additive as a release agent. By controlling the add amt. and the diameter of the dispersed polypropylene wax as an inner additive, both of offset and filming can be prevented.
COPYRIGHT: (C)1999,JPOAbstract translation: 要解决的问题：为了获得具有良好带电性和窄带电分布的调色剂，从而稳定了雾和图像密度。 解决方案：该电子照相调色剂基本上由具有<= 1.0mKOH / g酸值的粘合剂树脂组成，并且含有不进行表面氧化处理的> = 7.0 pH的着色剂。 粘合剂树脂含有低摩尔重量 聚丙烯作为内添加剂作为脱模剂。 通过控制添加。 并且作为内添加剂的分散的聚丙烯蜡的直径可以防止偏移和成膜。
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公开(公告)号：JP2007078849A
公开(公告)日：2007-03-29
申请号：JP2005264093
申请日：2005-09-12
Applicant: Sharp Corp , シャープ株式会社
Inventor： KATO TAKESHI , ISHIDA TOSHINAO , URATA YOSHITAKA , KOREMATSU KAZUYA , TAKAYAMA TAKESHI , HASEGAWA MITSUHIRO
CPC classification number: G03G9/1131 , G03G9/1075 , G03G9/1133 , G03G9/1135 , G03G9/1136 , G03G9/1139
Abstract: PROBLEM TO BE SOLVED: To provide a two-component developer that contains a carrier maintaining charging property to a toner in a high level for a long time without causing carrier deposition on a photoreceptor and responsible to a current long-life image forming device and that is capable of forming an image of high picture quality with high image density and high sharpness.
SOLUTION: The two-component developer 1 contains a toner 3 and a carrier 2 having a resin coating layer 5 formed on the surface of a core material 4, wherein the resin coating layer 5 contains alumina particles 6 and controlled in such a manner that the X-ray intensity of the alumina particles 6 by fluorescent X-ray analysis is lower than the X-ray intensity of a metal most included in the core material 4 by fluorescent X-ray analysis.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 要解决的问题：提供一种双组分显影剂，其包含保持长时间高水平调色剂的载体的载体，而不会导致载体沉积在感光体上并且对目前的长寿命图像形成负责 并且能够以高图像密度和高锐度形成高图像质量的图像。 解决方案：双组分显影剂1包含调色剂3和在芯材4的表面上形成有树脂涂层5的载体2，其中树脂涂层5含有氧化铝颗粒6并被控制在 通过荧光X射线分析，氧化铝粒子6的X射线强度比通过荧光X射线分析的核心材料4中最包含的金属的X射线强度低。 版权所有（C）2007，JPO＆INPIT
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公开(公告)号：JP2006235344A
公开(公告)日：2006-09-07
申请号：JP2005051247
申请日：2005-02-25
Applicant: Sharp Corp , シャープ株式会社
Inventor： OGAWA SATORU , ISHIDA TOSHINAO , SAWAI MASAYUKI , KIDA YASUSHI , NISHIKAWA TORU , TOIZUMI KIYOSHI , KUBO MASAHIKO
Abstract: PROBLEM TO BE SOLVED: To provide a toner not undergoing the effect of change in temperature and humidity, with high charging stability and having good fixing property and releasability.
SOLUTION: The electrophotographic toner includes a toner parent body particle containing at least a binder resin, a colorant, a charge controller and an additive, in which the binder resin comprises a polyester resin obtained by reacting an aromatic alcohol ingredient, the charge controller comprises an organic bentonite and the additive comprises metatitanic acid subjected to hyrdophobization processing.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：提供不具有温度和湿度变化的调色剂，具有高充电稳定性和良好的定影性和脱模性的调色剂。 电解调色剂：电子照相调色剂包括至少含有粘合剂树脂，着色剂，充电控制剂和添加剂的调色剂母体颗粒，其中粘合剂树脂包括通过使芳族醇成分反应获得的聚酯树脂， 控制器包括有机膨润土，并且添加剂包括经过氢化磷酸化处理的偏钛酸。 版权所有（C）2006，JPO＆NCIPI
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