公开(公告)号：JP2010176039A

公开(公告)日：2010-08-12

申请号：JP2009020998

申请日：2009-01-30

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TOIZUMI KIYOSHI ,  MATSUMOTO KATSURU ,  ONDA YUTAKA

IPC: G03G15/16 ,  G03G9/08 ,  G03G21/00 ,  G03G21/14

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus having an intermediate transfer means, the apparatus for maintaining an image carrying means in a clean state for a long period of time and suppressing degradation in the image quality of a formed image even when the supply of a recording medium fails prior to a primary transferring step in the process of using a spherical toner. SOLUTION: The image forming apparatus 100 includes a photoreceptor drum 11, an intermediate transfer belt 25, a cleaning blade 42, a recording medium supply unit 5, a cleaning assist roller 50, a recording medium detection sensor, and a control unit. When a determination result that transfer is not possible is sent to the control unit, the unit performs control in such manner that the cleaning assist roller 50 enlarges a transfer nip and that a toner image on the photoreceptor drum 11 is transferred onto the intermediate transfer belt 25. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种具有中间转印装置的图像形成装置，该装置用于将图像承载装置长时间保持在清洁状态，并且抑制成像图像的图像质量的劣化甚至 当在使用球形调色剂的过程中在一次转印步骤之前供应记录介质失效。 解决方案：图像形成装置100包括感光鼓11，中间转印带25，清洁刮板42，记录介质供给单元5，清洁辅助辊50，记录介质检测传感器和控制单元 。 当不能进行转印的确定结果被发送到控制单元时，单元以这样的方式执行控制，使得清洁辅助辊50放大转印辊隙，并且将感光鼓11上的调色剂图像转印到中间转印带 25.版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2008281655A

公开(公告)日：2008-11-20

申请号：JP2007123835

申请日：2007-05-08

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TSUBAKI YORIHISA ,  ONDA YUTAKA

IPC: G03G9/08 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To eliminate filming and blocking caused by a release agent exposed on a toner surface, and to provide a toner which avoids hot offset and excels in cleaning property and a method for manufacturing the same. SOLUTION: Toner particles 1a before elution treatment include at least a binder resin 2, a colorant (not shown) and a paraffinic wax 3a and an ester or carnauba wax 3b as a release agent, wherein the paraffinic wax 3a and the ester or carnauba wax 3b are dispersed in the binder resin 2 in a uniform dispersion diameter. When such toner particles 1a before elution treatment are subjected to elution treatment, the paraffinic wax 3a in the release agent exposed on the surfaces of the toner particles 1a is eluted into a solvent and removed and a toner 1b after elution treatment is obtained. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了消除由在调色剂表面上暴露的脱模剂引起的成膜和堵塞，并提供避免热偏移和清洁性能优异的调色剂及其制造方法。 解决方案：洗脱处理前的调色剂颗粒1a至少包括粘合剂树脂2，着色剂（未示出）和石蜡蜡3a以及作为脱模剂的酯或巴西棕榈蜡3b，其中链烷烃蜡3a和酯 或巴西棕榈蜡3b以均匀的分散体直径分散在粘合剂树脂2中。 当洗脱处理之前的这种调色剂颗粒1a进行洗脱处理时，暴露在调色剂颗粒表面上的脱模剂中的链烷烃蜡3a被洗脱到溶剂中并除去，得到洗脱处理后的调色剂1b。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008145875A

公开(公告)日：2008-06-26

申请号：JP2006334838

申请日：2006-12-12

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： ONDA YUTAKA

IPC: G03G15/08 ,  G03G9/08

Abstract: PROBLEM TO BE SOLVED: To provide a developing apparatus capable of immediately agitating a toner supplied to a two-component developer surface, for promptly mixing the toner homogeneously into the two-component developer. SOLUTION: Since one end of a paddle 23 is disposed, at a position slightly away from immediately below a toner supply opening 18, a toner ends up being dropped from the supply opening 18 to the vicinity of one end of the paddle 23. When the puddle 23 is rotated, the toner on the two-component developer surface is once pumped up, together with the two-component developer in the vicinity thereof by fins 23a of the puddle 23. Subsequently, the toner and the two-component developer are dropped from the fins 23a of the puddle 23 so that the toner lump is solved by the impact, at the time of dropping onto the two-component developing agent surface. According to the rotating motion of the puddle 23, pumping up and dropping of the toner and the two-component developer are repeated so that the toner on the two-component developer surface is agitated directly, while the toner lump is solved. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供能够立即搅拌供给到双组分显影剂表面的调色剂的显影装置，以便将调色剂均匀地混合到双组分显影剂中。 解决方案：由于桨叶23的一端设置在稍微远离调色剂供应开口18正下方的位置，调色剂从供给开口18落到桨形件23的一端附近 当水坑23旋转时，双组分显影剂表面上的调色剂通过水槽23的翅片23a与双组分显影剂一起被泵送到其附近。随后，调色剂和双组分 显影剂从熔池23的翅片23a落下，使得在滴落到双组分显影剂表面时，通过冲击来解决调色剂块。 根据熔池23的旋转运动，重复调色剂和双组分显影剂的抽吸和滴落，使得双组分显影剂表面上的调色剂直接搅拌，同时调色剂块被解决。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008070663A

公开(公告)日：2008-03-27

申请号：JP2006250116

申请日：2006-09-14

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： ONDA YUTAKA ,  YAMAMOTO YOSHINORI ,  SUZUKI MASARO

IPC: G03G9/08 ,  G03G9/10

CPC classification number: G03G9/0827 ,  G03G9/0819 ,  G03G9/10 ,  G03G9/107 ,  G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic toner which achieves rapid charge rise, has excellent cleanability and is capable of forming a high-quality image of high definition and high density. SOLUTION: The toner satisfies a toner enveloping degree ä(L1-L2)/L2}×100 of 2.0-3.0, wherein L1 is the perimeter of a projected image of a toner particle 1 including a binder resin and a colorant; and L2 is the length of the envelope 5 of the projected image of the toner particle 1. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了提供实现快速电荷升高的电子照相调色剂，具有优异的可清洁性，并且能够形成高清晰度和高密度的高质量图像。 调色剂满足2.0-3.0的调色剂包封度ä（L1-L2）/ L2}×100，其中L1是包括粘合剂树脂和着色剂的调色剂颗粒1的投影图像的周长; L2是调色剂颗粒1的投影图像的信封5的长度。版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007304295A

公开(公告)日：2007-11-22

申请号：JP2006131995

申请日：2006-05-10

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： OGAWA SATORU ,  ONDA YUTAKA ,  SUZUKI MASARO ,  YAMAMOTO YOSHINORI

IPC: G03G9/09 ,  G03G9/08 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a color toner in which the charge amount of each color toner is regulated to a preliminarily set range, and which causes no background fogging and can ensure good color reproducibility. SOLUTION: The amounts of the same external additive 3 for resistance regulation externally added to a cyan toner 1c, a magenta toner 1m and a yellow toner 1y are regulated so that the volume resistivity of each color toner falls within a preliminarily set range, whereby the volume resistivities of the cyan toner 1c, the magenta toner 1m and the yellow toner 1y can be regulated to the preliminarily set range, therefore the charge amount of each color toner falls within the preliminarily set range. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种彩色调色剂，其中将每种彩色调色剂的电荷量调节到预设的范围，并且不会引起背景雾化，并且可以确保良好的色彩再现性。

解决方案：调节外部添加到青色调色剂1c，品红色调色剂1m和黄色调色剂1y上的与外部添加剂相同的外部添加剂3的量，使得每种彩色调色剂的体积电阻率落在预设的范围内 由此，可以将青色调色剂1c，品红色调色剂1m和黄色调色剂1y的体积电阻率调节到预先设定的范围内，因此各彩色调色剂的电荷量落入预先设定的范围内。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007296494A

公开(公告)日：2007-11-15

申请号：JP2006128478

申请日：2006-05-02

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SUZUKI MASARO ,  ONDA YUTAKA ,  YAMAMOTO YOSHINORI ,  AKAZAWA YOSHIAKI

IPC: B07B7/083 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a method for classifying powder capable of easily obtaining powder with a desired particle size distribution without enlarging equipment. SOLUTION: The method for classifying powder by rotating the powder which is a mixture of powder and gas, a falling velocity of the powder is periodically varied. In such a classifying method, a particle group with a larger mean particle size can be obtained if the falling velocity of the powder is relatively small, and a particle group with a smaller mean particle size can be obtained if the falling velocity of the powder is relatively big. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够容易地获得具有所需粒度分布的粉末的粉末分级方法，而不需要扩大设备。 解决方案：通过旋转粉末和气体的混合物的粉末，粉末的下落速度来定期地改变粉末分级方法。 在这样的分级方法中，如果粉末的下降速度相对较小，则可以得到平均粒径较大的粒子群，如果粉末的下落速度为 比较大 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2004264792A

公开(公告)日：2004-09-24

申请号：JP2003065707

申请日：2003-03-11

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MUKAI TAKASHI ,  TOMITA SHOJI ,  ONDA YUTAKA ,  KATO ATSUSHI ,  ISHII HIROSHI ,  OKUMURA YOSHINOBU

IPC: G03G21/00 ,  G03G15/02

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus of a proximity electrification system which obtains high image quality by improving accuracy and reliability of control of the gap of a non-contact electrification roller with respect to a photoreceptor and by preventing ununiform electrification caused by abnormal discharge, electrification failure, etc. SOLUTION: The image forming apparatus adjusts a gap between the non-contact electrification roller 1a and the photoreceptor 2 by disposing a gap hold member 8 between the electrification roller 1a and the photoreceptor 2 such that the member 8 is brought into firm contact with the roller 1a and the photoreceptor 2. In the image forming apparatus, the firm contact position of the gap hold member 8 is situated in the inside of firmly-pressed-in areas of flanges the parts of which are firmly pressed in the ends of the main body of the photoreceptor. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2011052058A

公开(公告)日：2011-03-17

申请号：JP2009200120

申请日：2009-08-31

Applicant: Sharp Corp ,  シャープ株式会社

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

IPC: C08J3/03 ,  C08J3/16 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a fine resin particle dispersion liquid which can be used for producing toners capable of forming high quality images and has a narrow particle size distribution width.
SOLUTION: The method for producing a fine resin particle dispersion liquid is characterized by comprising a melting process, a phase inversion emulsification process for adding the first aqueous medium to the obtained melted state resin particles in a prescribed ratio, a dilution process for adding the second aqueous medium to the high pressure resin fine particle dispersion liquid, and a gradually cooling gradually pressure-reducing process, wherein a pressure P2 at the first aqueous medium-added position, and pressures P1 and P3 at the just front and just rear positions satisfy P1>P3>P2; a pressure P5 at the second aqueous medium-added position, and pressures P4 and P6 at the just front and just rear positions satisfy P4>P6>P5; and the retention times T1, T2 and T3 in the melting process, the phase inversion emulsification process, and both the processes of the dilution process and the gradually cooling gradually pressure-reducing process satisfy relations of T2>T3>T1 and T2=(1.2 to 2.0)×T1.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 解决的问题：提供一种可用于生产能够形成高质量图像并具有窄粒度分布宽度的调色剂的细树脂颗粒分散液的制备方法。 解决方案：用于生产精细树脂颗粒分散液的方法的特征在于包括熔融过程，用于以规定比例将所述第一水性介质加入到所获得的熔融状态树脂颗粒中的相转化乳化方法， 将第二水性介质加入到高压树脂微粒分散液中，逐渐降温逐步减压过程，其中在第一含水介质添加位置处的压力P2和刚刚前后刚好的压力P1和P3 位置满足P1> P3> P2; 在第二水性介质添加位置处的压力P5，刚好正面和刚好的后方位置处的压力P4和P6满足P4> P6> P5; 熔融过程中的保留时间T1，T2和T3，相转化乳化过程，以及稀释过程和逐渐降温逐步降压过程的两个过程都满足T2> T3> T1和T2 =（1.2 至2.0）×T1。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009168861A

公开(公告)日：2009-07-30

申请号：JP2008003747

申请日：2008-01-10

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： IMURA YASURO ,  ONDA YUTAKA ,  TSUBAKI YORIHISA ,  YAMADA SAORI

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/10 ,  G03G15/08

CPC classification number: G03G9/0827 ,  G03G9/081 ,  G03G9/0819 ,  G03G9/08782

Abstract: PROBLEM TO BE SOLVED: To provide a toner which has good cleanability and fixability, suppresses scattering and enables to form a fog-free high-quality image. SOLUTION: The toner satisfies 0.90≤(b)/(a)≤1.02 and 140≤(a)≤150, wherein (a) represents a shape factor SF-2 showing surface unevenness of toner particles having a particle size not more than a particle size D 75V at which the cumulative volume from the larger particle size side in a particle size distribution of the toner on a volume basis becomes 75%, and (b) represents a shape factor SF-2 showing surface unevenness of toner particles having a particle size not less than a particle size D 25V at which the cumulative volume from the larger particle size side in the particle size distribution on a volume basis becomes 25%, and an average of the shape factor SF-2 of the toner particles in all the toner particles is larger than 140. Such a toner is filled into a development tank 120 of a development device 114 in an image forming apparatus 101 and an image is formed. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了提供具有良好的可清洁性和定影性的调色剂，抑制散射并且能够形成无雾的高质量图像。 ＆lt; P＆gt;解决方案：调色剂满足0.90≤（b）/（a）≤1.02和140≤（a）≤150，其中（a）表示形状因子SF-2，表示不具有粒径的调色剂颗粒的表面不均匀 大于粒径D 75V ，其中在调色剂的体积基础上，较大粒度侧的累积体积为75％，（b）表示形状系数SF -2表示粒径分布中体积比较大粒径侧的累积体积的粒径不小于粒径D 25V 的调色剂颗粒的表面不均匀度为25％ ，并且所有调色剂颗粒中的调色剂颗粒的形状因子SF-2的平均值大于140.这种调色剂被填充到图像形成装置101中的显影装置114的显影槽120中，并且图像是 形成。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2009025750A

公开(公告)日：2009-02-05

申请号：JP2007191337

申请日：2007-07-23

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TSUBAKI YORIHISA ,  ONDA YUTAKA

IPC: G03G9/08 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a toner and a method for manufacturing the toner free from filming, having preferable fixing property and transfer efficiency and giving an image of high picture quality, and to provide a two-component developer, a developing device and an image forming apparatus. SOLUTION: The toner includes: a first group of toner particles containing at least a first binder resin having polarity, a first colorant and a first release agent having low polarity with respect to the first binder resin; and a second group of toner particles containing at least a second binder resin having polarity, a second colorant and a second release agent having high polarity with respect to the second binder resin, the second group having a volume average particle diameter smaller than that of the first group of toner particles. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了提供调色剂和不含成膜的调色剂的制造方法，具有优选的定影性和转印效率，并提供高图像质量的图像，并提供双组分显影剂，显影剂 装置和图像形成装置。 调色剂包括：至少含有极性的第一粘合剂树脂的第一组调色剂颗粒，相对于第一粘合剂树脂具有低极性的第一着色剂和第一脱模剂; 以及第二组含有极性的第二粘合剂树脂的调色剂颗粒，相对于第二粘合剂树脂具有高极性的第二着色剂和第二脱模剂，第二组的体积平均粒径小于 第一组调色剂颗粒。 版权所有（C）2009，JPO＆INPIT