公开(公告)号：JP2011128367A

公开(公告)日：2011-06-30

申请号：JP2009286642

申请日：2009-12-17

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

IPC: G03G15/08 ,  G03G9/10

Abstract: PROBLEM TO BE SOLVED: To provide superior images without abnormal images at all times by accurately detecting a toner density even when the flowability of toner largely fluctuates and accurately controlling the toner density in an image forming apparatus including a developing device of a two-component developing system. SOLUTION: Even when a developer is peeled by a reflux plate for making surplus developer regulated by a layer thickness regulating member flow back to a position separated from the layer thickness regulating member, the substantial decline of the flowability of the developer cannot be detected just by disposing a toner density detection sensor on the outer side of the end part of the reflux plate or in a range very close to a fixed magnet block. However, by disposing a density detection means at a position for detecting the toner density of a two-component developer flowing on the reflux plate, the decline of the flowability is detected beforehand, and highly accurate toner density control is made possible. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：即使当调色剂的流动性很大程度上波动并且精确地控制包括二色显影装置的图像形成装置中的调色剂浓度时，通过精确地检测调色剂密度来始终通过精确地检测调色剂浓度来始终提供优异的图像，无异常图像 - 组件开发系统。 解决方案：即使当显影剂被回流板剥离以使由层厚调节构件调节的多余的显影剂流回到与层厚调节构件分离的位置时，显影剂的流动性的显着下降不能 通过将调色剂浓度检测传感器设置在回流板的端部的外侧或非常接近固定磁体块的范围内来检测。 然而，通过将密度检测装置设置在用于检测在回流板上流动的双组分显影剂的调色剂密度的位置，预先检测流动性的下降，并且使得能够进行高精度的调色剂浓度控制。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2008197289A

公开(公告)日：2008-08-28

申请号：JP2007031303

申请日：2007-02-09

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a developing device in which a developing roller is disposed vertically higher than stir members, the developing device being designed such that even if the boundary surface of developer in a developing tank lowers, a quantity of developer conveyed from the stir members to the developing roller is prevented from decreasing, and an increase in printing speed and a decrease in the size of an image forming apparatus are satisfied. SOLUTION: The developing device 1 includes the developing tank 2, a developing roller 3, the first stir member 4, the second stir member 5, a conveying member 6, a restricting member 7, and a flowing plate 9. In the developing device 1, a magnetic member 10 having a shape corresponding to the shape of the vertically lower part of the flowing plate 9 is disposed in contact with the vertical underside of the flowing plate 9. A distance between the surface of the developing roller 3 and the end of the magnetic member 10, which end is closest to the developing roller 3, is set to 0.1 mm to 10 mm. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种显影装置，其中显影辊垂直地设置在搅拌构件的上方，该显影装置被设计成使得即使显影槽中显影剂的边界面下降，显影剂量 从搅拌部件传送到显影辊被防止减小，并且满足了打印速度的增加和图像形成装置的尺寸的减小。 解决方案：显影装置1包括显影槽2，显影辊3，第一搅拌构件4，第二搅拌构件5，输送构件6，限制构件7和流动板9。 显影装置1，具有与流动板9的垂直下部的形状相对应的形状的磁性构件10与流动板9的垂直底面接触。显影辊3的表面与显影辊3的表面之间的距离 磁性构件10的端部最靠近显影辊3的端部被设定为0.1mm至10mm。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2004333759A

公开(公告)日：2004-11-25

申请号：JP2003128124

申请日：2003-05-06

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO KATSURU ,  FUJITA SAYAKA ,  SAKAI MASAHIRO ,  MURAKAMI TOSHIHIKO ,  TOYODA MITSUHIRO

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

Abstract: PROBLEM TO BE SOLVED: To provide toner for electrophotographs having improved balance in low-temperature fixing properties, hot-offset-resistant properties, and shelf life. SOLUTION: The toner for developing electrostatic charge images contains at least one type of a binding resin, where at least two types of resins are mixed, and a crystalline polyester resin (resin (C)) whose melting point is in the range of 80°C-140°C, and a wax (W) whose penetration is 1.5 or smaller and the melting point is in the range of 80-110°C. The binding resin comprises resin (A) that has the softening point of 120-170°C, glass transition point of 58-75°C, and a chloroform insoluble fraction of 5-50 percentage by mass; and resin (B) that has the softening point of 90-120°C and the glass transition point (Tg) of 58-75°C. The chloroform insoluble fraction of the binding resin, where the resins (A) and (B) are mixed, is smaller than 30 mass percent. COPYRIGHT: (C)2005,JPO&NCIPI

公开(公告)号：JP2011081153A

公开(公告)日：2011-04-21

申请号：JP2009232917

申请日：2009-10-07

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

IPC: G03G15/08 ,  G03G9/10

Abstract: PROBLEM TO BE SOLVED: To always provide a preferable image without an abnormal image by accurately detecting a toner density and controlling a toner density with high accuracy even when the fluidity of the toner greatly changes, in an image forming apparatus including a developing device employing a two-component developing system. SOLUTION: There may occur problems of decrease in the fluidity of a developer due to degradation of the developer or of significant decrease in the fluidity of a developer due to continuous printing of low-density documents, and these problems can not be sufficiently solved only by a density detecting means arranged below a stirring member, and detecting the toner density of the two-component developer. Decrease in the fluidity is preliminarily sensed and the toner density is controlled with high accuracy by arranging a back-flow plate, which allows an excess developer regulated by a layer thickness regulating member to flow from the layer thickness regulating member back to a separated position, and also by arranging a density detecting means, which detects a toner density of a two-component developer flowing over the back-flow plate. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：即使当调色剂的流动性大大变化时，通过精确地检测调色剂浓度和高精度地调节调色剂浓度来始终提供没有异常图像的优选图像，在包括显影剂 装置采用双组分显影系统。 解决方案：由于显影剂的劣化或由于连续印刷低密度文件而导致显影剂的流动性显着降低，可能会导致显影剂流动性降低的问题，并且这些问题不能充分 仅通过布置在搅拌构件下方的浓度检测装置解决，并且检测双组分显影剂的调色剂浓度。 预先检测出流动性的下降，并且通过设置允许由层厚调节构件调节的过量显影剂从层厚调节构件返回到分离位置的背流板，以高精度控制调色剂浓度， 并且还设置密度检测装置，其检测流过背流板的双组分显影剂的调色剂浓度。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2007114607A

公开(公告)日：2007-05-10

申请号：JP2005307603

申请日：2005-10-21

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

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

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic toner which exerts excellent improving effects on all of storage stability, low-temperature fixability, offset resistance, environmental stability and environmental conservation. SOLUTION: The toner for nonmagnetic one-component development comprising a binder resin, a colorant and a release agent is used in a nonmagnetic one-component developing system using a developing device equipped with a developing roller and a conductive regulating blade which uniformly regulates the thin layer of toner formed on the developing roller and imparts charges to the toner, wherein the toner comprises an amorphous polyester (A) having a weight average molecular weight (Mw) of 300,000-1,000,000, an amorphous polyester (B) having a weight average molecular weight (Mw) of 1,000-30,000, a biodegradable resin (C) having a melting point of 80-140°C and a wax (W) having a melting point of 70-110°C. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种对保存稳定性，低温定影性，耐偏移性，环境稳定性和环境保护全部具有优异改进效果的电子照相调色剂。 解决方案：在非磁性单组分显影系统中使用包含粘合剂树脂，着色剂和脱模剂的非磁性单组分显影用调色剂，该系统使用配有显影辊和导电调节片的显影装置，其均匀地 调节形成在显影辊上的调色剂薄层并向调色剂赋予电荷，其中调色剂包含重均分子量（Mw）为30万-1,000,000的无定形聚酯（A），具有 重均分子量（Mw）为1000-30,000，熔点为80-140℃的可生物降解树脂（C）和熔点为70-110℃的蜡（W）。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006208455A

公开(公告)日：2006-08-10

申请号：JP2005016931

申请日：2005-01-25

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

IPC: G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic toner exhibiting an excellent effect in all of storage stability, low-temperature fixing property, offset resistance, environmental stability, and environmental preservation property and a method for manufacturing the same.
SOLUTION: The manufacturing of the toner is characterized in that the various physical properties (softening point, glass transition point, rate of chloroform insoluble matter, etc.) of resin components constituting a binder resin are restricted to prescribed ranges and the temperature at the melt kneading and discharge of a binder resin in particular during the manufacturing process of the toner is restricted within the prescribed range.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供在保存稳定性，低温定影性，耐偏移性，环境稳定性和环境保存性方面具有优异效果的电子照相调色剂及其制造方法。 调色剂的制造的特征在于，构成粘合剂树脂的树脂成分的各种物理性质（软化点，玻璃化转变点，氯仿不溶物的比例等）限定在规定范围内，温度 特别是在调色剂的制造过程中，熔融混炼和粘合剂树脂的排出被限制在规定范围内。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004334041A

公开(公告)日：2004-11-25

申请号：JP2003132047

申请日：2003-05-09

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： FUJITA SAYAKA ,  MATSUMOTO KATSURU ,  SAKAI MASAHIRO ,  MURAKAMI TOSHIHIKO ,  KATO TAKESHI ,  TENJIKU EIJI

IPC: G03G9/09 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a method for evaluating whether a masterbatch for a toner is good or not, and to provide a good masterbatch for a toner obtained by the evaluation method and a toner. SOLUTION: In the method for evaluating a masterbatch for a toner consisting essentially of a binder resin and a colorant, whether relation satisfying -6≤logRm-logRr is established or not between the volume resistivity Rr (Ωcm) of the binder resin and the volume resistivity Rm (Ωcm) of the masterbatch is ascertained. The masterbatch for a toner establishes relation satisfying -6≤logRm-logRr according to the evaluation method. The toner comprises the masterbatch for a toner and has a volume average particle diameter of ≤7 μm. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种用于评估调色剂母料是否良好的方法，以及为通过评估方法获得的调色剂和调色剂提供良好的母料。 解决方案：在用于评估基本上由粘合剂树脂和着色剂组成的调色剂的母料的方法中，在粘合剂树脂的体积电阻率Rr（Ωcm）之间是否建立满足-6≤logRm-logRr的关系 并确定母料的体积电阻率Rm（Ωcm）。 调色剂母料根据评估方法建立满足-6≤logRm-logRr的关系。 调色剂包含用于调色剂的母料，体积平均粒径≤7μm。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2003270852A

公开(公告)日：2003-09-25

申请号：JP2002070594

申请日：2002-03-14

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TENJIKU EIJI ,  KATO TAKESHI ,  FUJITA SAYAKA ,  MATSUMOTO TAKATSURU ,  MURAKAMI TOSHIHIKO ,  SAKAI MASAHIRO ,  MATSUO YASUNORI

IPC: G03G9/08 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic toner excellent in all of low temperature fixing property, offset resistance, blocking resistance, fluidity and pulverizing property, free from contamination of a photoreceptor, capable of keeping a superior charge amount for a long period of time, and suitable for a recycling method. SOLUTION: The toner contains a binder resin essentially comprising crystalline polyester (resin A) and amorphous polyester and/or amorphous polyester polyamide (resin B), and has ≥30% surface coating rate by an external additive. The resin A is obtained by condensation polymerization of an alcohol component containing 2-6C diols by ≥80 mol% and a carboxylic acid component containing fumaric acid by ≥80 mol% and has 85 to 150°C softening point. The resin B is obtained by condensation polymerization of monomers containing an aromatic compound by ≥50 wt.%. The weight ratio of resin A to resin B ranges from 1/99 to 50/50. COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：提供一种电子照相调色剂，其全部低温定影性，耐偏移性，耐粘连性，流动性和粉碎性均不受感光体的污染，能够长时间保持优异的电荷量 一段时间，适合回收利用的方法。 调色剂包含基本上包含结晶聚酯（树脂A）和无定形聚酯和/或无定形聚酯聚酰胺（树脂B）的粘合剂树脂，并且通过外部添加剂具有≥30％的表面涂布速率。 树脂A通过含有≥80摩尔％的含2-6摩尔二醇的醇组分和含有富马酸的羧酸组分≥80摩尔％并具有85至150℃软化点而缩合得到。 树脂B通过使含有芳香族化合物的单体的缩聚≥50重量％而得到。 树脂A与树脂B的重量比为1/99〜50/50。 版权所有（C）2003，JPO

公开(公告)号：JP2011081152A

公开(公告)日：2011-04-21

申请号：JP2009232916

申请日：2009-10-07

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a developing device preventing decrease in an image density or occurrence of filming on a photoreceptor, by controlling temperature not only through a detecting result of temperature of a developing tank, but by taking a state of a toner external additive into consideration, and also to provide an image forming apparatus using the developing device. SOLUTION: The developing device includes: a temperature sensor sensing the temperature of the developing tank; and a temperature control means controlling the sensed temperature. The device prevents decrease in an image density, sticking of a developer and occurrence of filming on a photoreceptor in such a way that: when an image area rate of a document to be printed is not more than 1%, the developing tank is cooled by the temperature control means; with the image area rate of 15% or more, the tank is not cooled; and with the image area rate from 2% to 14%, the tank is cooled only when the temperature of the developing tank is equal to or higher than the glass transition temperature (60°C) of the toner resin. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种显影装置，其不仅通过显影罐的温度的检测结果控制温度，而且通过采取显影剂的状态来防止图像浓度降低或感光体上的成膜发生 考虑到调色剂外部添加剂，并且还提供使用该显影装置的图像形成装置。 解决方案：显影装置包括：感测显影槽温度的温度传感器; 以及控制感测温度的温度控制装置。 该装置防止图像浓度降低，显影剂粘附和感光体上的成膜，使得当要印刷的文件的图像面积率不大于1％时，显影槽被冷却 温度控制装置; 图像面积率为15％以上，水箱不冷却; 并且图像面积率为2％至14％时，只有当显影槽的温度等于或高于调色剂树脂的玻璃化转变温度（60℃）时，才冷却罐。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010266674A

公开(公告)日：2010-11-25

申请号：JP2009117760

申请日：2009-05-14

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SAKAI MASAHIRO

IPC: G03G15/09 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a developing device in which developer is efficiently supplied to and removed from a developing roller, using a simple constitution and which can improve conveyance of the developer, and to provide an image forming apparatus which uses the developing device. SOLUTION: In the developing device 1 including a developer tank 2, a developing roller 3, and a layer thickness controlling member 7, which controls an amount of the developer on the surface of the developing roller 3, the developing roller 3 includes a main pole N1 and a commutating pole N2, which provides the same magnetic pole as the main pole; the layer thickness control member 7 including a nonmagnetic blade 7a and a magnetic blade 7b. An angle θ1 between the blade main poles and an angle θ2 between the blade commutating poles are set to in the range of 85-95 (degrees), saturated magnetization is set to a value between 75 and 130 (emu/cm 3 ), when the magnetic flux density of carriers of the developer is 100 (mT); and the distance between the developing roller 3 and the nonmagnetic blade 7a is set larger than the distance between a photoreceptor drum 13 and the developing roller 3 by 0.40-0.80 (mm). COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种显影装置，其中使用简单的结构有效地向显影辊供应显影剂并且可以改善显影剂的输送，并且提供一种图像形成装置，其使用 开发装置。 解决方案：显影辊3包括控制显影辊3的表面上的显影剂量的显影剂罐2，显影辊3和层厚度控制部件7的显影装置1包括 主极N1和整流极N2，其提供与主极相同的磁极; 层厚度控制构件7包括非磁性叶片7a和磁性叶片7b。 叶片主极之间的角度θ1和叶片换向极之间的角度θ2设定在85-95（度）的范围内，饱和磁化强度设定为75〜130（emu / cm 3） 当显影剂的载流子的磁通密度为100（mT）时; 并且显影辊3和非磁性刮刀7a之间的距离设定为大于感光鼓13和显影辊3之间的距离0.40-0.80（mm）。 版权所有（C）2011，JPO＆INPIT