公开(公告)号：JP2012113109A

公开(公告)日：2012-06-14

申请号：JP2010261566

申请日：2010-11-24

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： ONDA YUTAKA ,  TOIZUMI KIYOSHI ,  SHIBAI YASUHIRO

IPC: G03G15/08 ,  G03G15/095 ,  G03G15/16 ,  G03G21/00

Abstract: PROBLEM TO BE SOLVED: To recover a deteriorated carrier with a simple configuration.SOLUTION: An image forming apparatus includes a photoreceptor, an exposure part, a developing device, an intermediate transfer body 5, first and second transfer devices 71 to 74 and 8, a cleaning device 10, and a controller 34 executing first and second modes. When a two-component developer containing a toner and a carrier is used in the developing device, the controller executes a step for forming an electrostatic latent image on the photoreceptor by the exposure part, developing the electrostatic latent image into a toner image by the developing device, transferring the toner image to a first area of the intermediate transfer body by the first transfer device, transferring the transferred toner image to a recording medium by the second transfer device, and then, recovering the toner remaining on the intermediate transfer body by the cleaning device, in the first mode, and a step for making the deteriorated carrier of the developing device electrostatically adhere onto the photoreceptor, transferring the adhered deteriorated carrier to a second area of the intermediate transfer body by the first transfer device, and then, recovering the deteriorated carrier by the cleaning device, in the second mode.

Abstract translation: 要解决的问题：以简单的配置恢复劣化载体。 解决方案：图像形成装置包括感光体，曝光部分，显影装置，中间转印体5，第一和第二转印装置71至74和8，清洁装置10和首先执行的控制器34 第二种模式。 当在显影装置中使用含有调色剂和载体的双组分显影剂时，控制器执行通过曝光部分在感光体上形成静电潜像的步骤，通过显影来将静电潜像显影成调色剂图像 装置，通过第一传送装置将调色剂图像转印到中间转印体的第一区域，通过第二转印装置将转印的调色剂图像转印到记录介质上，然后通过第二转印装置回收残留在中间转印体上的调色剂 在第一模式中的清洁装置和用于使显影装置的劣化载体的静电粘附到感光体上的步骤，通过第一转印装置将附着的劣化载体转印到中间转印体的第二区域，然后回收 在第二模式中由清洁装置劣化的载体。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2011118316A

公开(公告)日：2011-06-16

申请号：JP2009278035

申请日：2009-12-07

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SHIBAI YASUHIRO

IPC: G03G9/08 ,  G03G9/10

Abstract: PROBLEM TO BE SOLVED: To provide a toner and a two-component developer having good fluidity and achieving high picture quality and low temperature fixing. SOLUTION: The toner contains a first toner particle group and a second toner particle group. The volume average particle diameter of the first toner particle group is smaller than the volume average particle diameter of the second toner particle group. The circularity of the second toner particle group is larger than the circularity of the first toner particle group. The two-component developer contains such a toner and a carrier. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供具有良好流动性并实现高图像质量和低温定影的调色剂和双组分显影剂。 调色剂含有第一调色剂颗粒组和第二调色剂颗粒组。 第一调色剂颗粒组的体积平均粒径小于第二调色剂颗粒组的体积平均粒径。 第二调色剂颗粒组的圆度大于第一调色剂颗粒组的圆度。 双组分显影剂含有这种调色剂和载体。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010243612A

公开(公告)日：2010-10-28

申请号：JP2009089623

申请日：2009-04-01

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： ONDA YUTAKA ,  TOIZUMI KIYOSHI ,  MATSUMOTO KATSURU ,  SHIBAI YASUHIRO

IPC: G03G9/08 ,  G03G9/087 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide toner which is hardly flocculated and allows fixing at a low temperature, and also to provide a two-component developer containing the toner, and a developing device using the two-component developer. SOLUTION: The toner contains a first toner particle group and a second toner particle group. A volume average particle size of the first toner particle group is smaller than that of the second toner particle group. Only toner particles constituting the second toner particle group, out of toner particles constituting the first toner particle group and toner particles constituting the second toner particles group, contain a crystalline polyester resin. The two-component developer containing this toner is charged in the developing device to perform development. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供几乎不絮凝并允许在低温下定影的调色剂，以及提供含有调色剂的双组分显影剂和使用该双组分显影剂的显影装置。 调色剂含有第一调色剂颗粒组和第二调色剂颗粒组。 第一调色剂颗粒组的体积平均粒度小于第二调色剂颗粒组的体积平均粒度。 仅构成第二调色剂颗粒组的调色剂颗粒，构成第一调色剂颗粒组的调色剂颗粒和构成第二调色剂颗粒组的调色剂颗粒含有结晶聚酯树脂。 将含有该调色剂的双组分显影剂装入显影装置中进行显影。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010241878A

公开(公告)日：2010-10-28

申请号：JP2009089622

申请日：2009-04-01

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO KATSURU ,  ONDA YUTAKA ,  TOIZUMI KIYOSHI ,  SHIBAI YASUHIRO

IPC: C08J3/05 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a crystalline polyester resin fine particle dispersion at high production efficiency, while stably maintaining the dispersion state of the crystalline polyester resin fine particle in an aqueous medium and accelerating uniform crystallization of the crystalline polyester resin fine particle to prevent decrease in a crystallization degree. SOLUTION: The method includes a step of preparing a fine particle dispersion liquid for obtaining a fine particle dispersion liquid having crystalline polyester resin fine particle dispersed in an aqueous medium; wherein the preparation step includes a shearing step and a cooling and pressure-reducing step. In the shearing step, the aqueous medium is added to coarsely pulverized particles of the crystalline polyester resin agitated and conveyed under heating and pressurizing conditions, so as to carry out phase inversion emulsification while adding shearing force. In the cooling and pressure-reducing step, the dispersion liquid conveyed while agitated is cooled and pressure-reduced so as to gradually decrease the temperature and pressure. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 待解决的问题：为了提供一种以高生产率生产结晶聚酯树脂细颗粒分散体的方法，同时稳定地将结晶聚酯树脂细颗粒的分散状态保持在水性介质中并促进结晶的均匀结晶 聚酯树脂细颗粒以防止结晶度降低。 解决方案：该方法包括制备细颗粒分散液以获得分散在水性介质中的结晶聚酯树脂细颗粒的细颗粒分散液的步骤; 其中所述制备步骤包括剪切步骤和冷却和减压步骤。 在剪切步骤中，将水性介质加入到在加热和加压条件下搅拌和输送的结晶聚酯树脂的粗粉碎颗粒中，以在加入剪切力的同时进行相转化乳化。 在冷却和减压步骤中，搅拌下输送的分散液被冷却和减压，以便逐渐降低温度和压力。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010204581A

公开(公告)日：2010-09-16

申请号：JP2009052589

申请日：2009-03-05

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TOIZUMI KIYOSHI ,  ONDA YUTAKA ,  MATSUMOTO KATSURU ,  SHIBAI YASUHIRO

IPC: G03G9/08 ,  G03G9/10 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a toner, a two-component developer, a developing device and an image forming apparatus, for increasing image density and improving dot reproducibility. SOLUTION: The toner contains a first toner particle group and a second toner particle group, in which the volume average particle diameter of the first toner group is smaller than the volume average particle diameter of the second toner group, and the glass transition temperature of a binder resin included in the toner particles constituting the first toner particle groups is higher than the glass transition temperature of a binder resin included in the toner particles constituting the second toner particle group. Image density can be increased and dot reproducibility can be improved without degrading low temperature fixability by increasing the glass transition temperature of a binder resin included in the toner particles of the first toner particle group, which is easily aggregated because the volume average particle diameter is smaller as well as by decreasing the glass transition temperature of a binder resin included in the toner particles of the second particle group, which is inferior in transferring heat during fixing because the volume average particle diameter is larger. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供调色剂，双组分显影剂，显影装置和图像形成装置，用于增加图像浓度和提高点再现性。

解决方案：调色剂含有第一调色剂颗粒组和第二调色剂颗粒组，其中第一调色剂组的体积平均粒径小于第二调色剂组的体积平均粒径，玻璃化转变 包含在构成第一调色剂颗粒组的调色剂颗粒中的粘合剂树脂的温度高于构成第二调色剂颗粒组的调色剂颗粒中包含的粘合剂树脂的玻璃化转变温度。 通过增加包含在第一调色剂颗粒组的调色剂颗粒中的粘合剂树脂的玻璃化转变温度，由于体积平均粒径较小，容易聚集，可以提高图像密度并且可以提高点再现性，而不降低低温定影性 并且通过降低由于体积平均粒径较大而在固定期间传递热量的第二颗粒组的调色剂颗粒中包含的粘合剂树脂的玻璃化转变温度。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2007328206A

公开(公告)日：2007-12-20

申请号：JP2006160319

申请日：2006-06-08

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： KIKAWA KEIICHI ,  ARIYOSHI SATOSHI ,  SHIBAI YASUHIRO

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic toner capable of forming a high-quality image having high image density, high chroma (definition) and good color reproducibility in spite of a higher colorant concentration, and effective also in reducing toner consumption.
SOLUTION: The toner containing a colorant at a high concentration of ≥6 wt.% and having a determination coefficient (R
2 ) of ≥0.98 is obtained by emulsifying and dispersing a melt-kneaded product containing a binder resin and the colorant in dispersant-containing water under heating. The determination coefficient (R
2 ) is obtained when a logarithmic curve is drawn from cylinder pressures of an elevated flow tester and actual measurements of 1/2 softening temperature of the toner, and then an approximated curve is drawn by logarithmically approximating the logarithmic curve.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供能够形成具有高图像密度，高色度（定义）和良好的色彩再现性的高质量图像的电子照相调色剂，尽管着色剂浓度较高，并且还有效降低调色剂消耗 。 ＆lt; P＆gt;解决方案：将含有≥6重量％的高浓度且具有≥0.98的测定系数（R 2 ）的着色剂的调色剂通过乳化和分散熔融捏合产物 在加热下含有粘合剂树脂和着色剂在含分散剂的水中。 当从升高的流动测试仪的气缸压力和调色剂的1/2软化温度的实际测量值中抽取对数曲线时，获得测定系数（R 2 ），然后绘出近似曲线 通过对数近似对数曲线。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007219452A

公开(公告)日：2007-08-30

申请号：JP2006043073

申请日：2006-02-20

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SHIBAI YASUHIRO ,  ARIYOSHI SATOSHI ,  MATSUMOTO KATSURU

IPC: G03G9/087 ,  G03G9/08

CPC classification number: G03G9/0804 ,  G03G9/08782

Abstract: PROBLEM TO BE SOLVED: To manufacture a toner excellent in image reproducibility, which forms a high-quality image of high definition and high resolution, and is free from filming on a photoreceptor due to bleed-out of wax, an offset phenomenon in a high temperature range and the like. SOLUTION: Resin particles containing at least a binder resin and wax particles having a particle diameter of 30-600 nm are aggregated and the resultant aggregates are heated. The wax particles having a particle diameter of 30-600 nm are manufactured, e.g., by a granulation method including a coarse powder preparing step S1, a slurry preparing step S2, a pulverization step S3, a cooling step S4, and a pressure reduction step S5, wherein a slurry of wax coarse powder obtained at the step S1 and the step S2 is passed through a pressure-resistant nozzle under application of heat and pressure at the step S3, whereby the wax coarse powder is pulverized to obtain wax particles, and the step S4 and the step S5 are carried out immediately after the step S3 to prevent coarsening of the wax particles. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了制造图像再现性优异的调色剂，其形成高清晰度和高分辨率的高质量图像，并且由于蜡渗出而在感光体上没有成膜，偏移现象 在高温范围等。 解决方案：将至少含有粘合剂树脂的树脂颗粒和粒径为30-600nm的蜡颗粒聚集，并将所得聚集体加热。 制造粒径为30-600nm的蜡颗粒，例如通过包括粗粉末制备步骤S1，浆料制备步骤S2，粉碎步骤S3，冷却步骤S4和减压步骤的造粒方法 S5，其中在步骤S3中在步骤S1和步骤S2获得的蜡粗粉末的浆料在加热和加压下通过耐压喷嘴，由此将蜡粗粉末粉碎以获得蜡颗粒，并且 在步骤S3之后立即执行步骤S4和步骤S5，以防止蜡颗粒的粗大化。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2007187917A

公开(公告)日：2007-07-26

申请号：JP2006006544

申请日：2006-01-13

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO KATSURU ,  SHIBAI YASUHIRO

IPC: G03G9/087

CPC classification number: G03G9/0817 ,  G03G9/0804 ,  G03G9/081 ,  G03G9/0815

Abstract: PROBLEM TO BE SOLVED: To manufacture toner superior in image reproduction and forming high quality image of high fineness and high resolution and in which filming to a photoreceptor caused by bleed-out of wax, an offset phenomenon in a high temperature region and the like do not occur.
SOLUTION: In a method for manufacturing the toner including a coarse powder preparation process S1, a slurry preparation process S2, a crushing process S3, a cooling process S4, and a depressurization process S5, small diameter toner particles are obtained by passing slurry of toner coarse powder obtained in the processes S1, S2 through a pressure resistant nozzle under heating and pressurization in the process S3 to crush toner coarse powder, and dispersion of a wax component into the toner particles is promoted by providing the process S4 just after the process S3. Furthermore, occurrence of bubbling and coarseness of the toner particles accompanying it are prevented by providing a process S5, thus the wax is uniformly dispersed, and the small diameter toner particles are obtained without generating bleed-out.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了制造图像再现性优异并形成高精细度和高分辨率的高质量图像，并且由于渗出蜡而导致的感光体成膜，高温区域的偏移现象和 不会发生。 解决方案：在用于制造包括粗粉末制备工艺S1，浆料制备工艺S2，破碎工艺S3，冷却工艺S4和减压工艺S5的调色剂的方法中，通过通过获得小直径调色剂颗粒 在工艺S3中通过加压加压在工艺S1，S2中获得的调色剂粗粉末的浆料粉碎调色剂粗粉末，并通过在后面提供工艺S4来促进蜡组分分散在调色剂颗粒中 过程S3。 此外，通过提供工艺S5来防止伴随其的调色剂颗粒的起泡和粗糙度的发生，从而蜡均匀分散，并且获得小直径调色剂颗粒而不产生渗出。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006091373A

公开(公告)日：2006-04-06

申请号：JP2004276103

申请日：2004-09-22

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TSUBAKI YORIHISA ,  SHIBAI YASUHIRO ,  KIKAWA KEIICHI

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/10

Abstract: PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner which prevents image fog and filming, which induces no decrease in charge stability and fluidity even when used for a long period of time, and which is improved in the fixing property of the toner to a recording material. SOLUTION: The electrostatic charge image developing toner 1 comprises: mother toner particles 7 containing a binder resin 2 and a colorant 3; organic particles 4 comprising organic particle cores and a resin coating material coating the organic particle cores and internally added to the mother toner particles 7; and inorganic or organic external additive particles 6 externally added to the mother toner particles 7. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种防止图像雾化和成膜的静电荷图像显影调色剂，即使长时间使用也不会降低电荷稳定性和流动性，并且其定影性能得到改善 的调色剂到记录材料。 静电荷图像显影调色剂1包括：含有粘合剂树脂2和着色剂3的母体调色剂颗粒7; 有机颗粒4包括有机颗粒芯和涂覆有机颗粒芯的树脂涂层材料，并且内部添加到母体调色剂颗粒7中; 以及外部添加到母体调色剂颗粒7中的无机或有机外部添加剂颗粒6.版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005173489A

公开(公告)日：2005-06-30

申请号：JP2003416800

申请日：2003-12-15

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SHIBAI YASUHIRO ,  MATSUMOTO KATSURU ,  ARIYOSHI SATOSHI

IPC: G03G9/09

Abstract: PROBLEM TO BE SOLVED: To provide a color toner for electrostatic latent image development which satisfies both of contradicting characteristics of transparency and electrostatic charge stability at a high level and further excels in color reproducibility, colorability, etc. SOLUTION: The color toner which is packed into a developing unit 19 of an image forming apparatus 100 and is used for development of the electrostatic latent image formed on the surface of a photoreceptor 16 is prepared by sticking a pyrolyzable polar group to a pigment surface to uniformly disperse the pigment into a binder resin, decomposing the pyrolyzable polar group by heating at the time of dispersion, and regulating the content thereof to ≤1.0 KOHmg per 1 g of the toner. Since the toner is excellent in both of the transparency and the electrostatic charge stability, the toner is capable of forming an image of high sharpness and high grade having the excellent color reproducibility, colorability, etc., for a long period of time. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种静电潜像显影用彩色调色剂，其高透明度和静电电荷稳定性的矛盾特性都很好，再现色彩再现性，着色性等。解决方案： 通过将可热分解的极性基团粘附到颜料表面上来制备装填到图像形成装置100的显影单元19中并用于形成在感光体16的表面上的静电潜像的显影的彩色调色剂，以均匀分散 将颜料转化为粘合剂树脂，在分散时通过加热分解可热解极性基团，并将其含量调节至每1g调色剂≤1.0KOHmg。 由于调色剂在透明性和静电电荷稳定性方面均优异，所以调色剂能够长时间形成具有优异的着色再现性，着色性等的高锐度和高等级的图像。 版权所有（C）2005，JPO＆NCIPI