公开(公告)号：US07110696B2

公开(公告)日：2006-09-19

申请号：US10668311

申请日：2003-09-24

申请人： Eisaku Murakami ,  Masami Tomita ,  Masanori Kawasumi ,  Toshio Koike ,  Naohiro Kumagai ,  Atsushi Sampe ,  Takeshi Shintani ,  Masato Yanagida ,  Yutaka Takahashi ,  Hiroya Hirose ,  Shin Hasegawa ,  Hiroyuki Nagashima ,  Takeshi Uchitani ,  Kazunori Karasawa ,  Kentaroh Matsumoto ,  Tokuya Ohjimi ,  Mugijiroh Uno

发明人： Eisaku Murakami ,  Masami Tomita ,  Masanori Kawasumi ,  Toshio Koike ,  Naohiro Kumagai ,  Atsushi Sampe ,  Takeshi Shintani ,  Masato Yanagida ,  Yutaka Takahashi ,  Hiroya Hirose ,  Shin Hasegawa ,  Hiroyuki Nagashima ,  Takeshi Uchitani ,  Kazunori Karasawa ,  Kentaroh Matsumoto ,  Tokuya Ohjimi ,  Mugijiroh Uno

IPC分类号： G03G15/16 ,  G03G21/00

CPC分类号： G03G15/166 ,  G03G21/0011 ,  G03G21/0076 ,  G03G2215/1661 ,  G03G2221/001 ,  G03G2221/0042 ,  G03G2221/0089

摘要： A cleaning unit includes a first blade and a second blade. The first blade is in contact with an image carrier or a paper carrier and removes adhered substances remained on surface of these. The second blade has an abrasive layer that is formed by including abrasive particles in an elastic material and is disposed in the downstream side of the first blade. The second blade is allowed to be in contact with the image carrier 1 or the paper carrier. Volume occupancy of abrasive particles in an area of contact of the second blade with either the image carrier or the paper carrier is not less than 50 percent and not more than 90 percent.

摘要翻译： 清洁单元包括第一叶片和第二叶片。 第一叶片与图像载体或纸载体接触并除去残留在其上的附着物质。 第二刀片具有通过将磨料颗粒包括在弹性材料中并且设置在第一刀片的下游侧而形成的研磨层。 允许第二个刀片与图像载体1或纸张载体接触。 第二叶片与图像载体或纸载体的接触区域中的磨粒的体积占有率不小于50％且不大于90％。

公开(公告)号：US07072609B2

公开(公告)日：2006-07-04

申请号：US10843556

申请日：2004-05-12

申请人： Kazunori Karasawa

发明人： Kazunori Karasawa

IPC分类号： G03G15/20 ,  G03G21/20

CPC分类号： G03G15/2025

摘要： An image forming apparatus capable of preventing toner offset is disclosed that includes an image forming mechanism and a fixing device. The fixing device includes a fixing rotator, a pressure rotator, a cleaning roller, a temperature detector, and a cooler. The temperature detector detects a surface temperature of at least one of the fixing rotator, the pressure rotator, and the cleaning roller. The cooler operates based on the temperature detected by the temperature detector. An image forming method and an image fixing method are also described.

摘要翻译： 公开了一种能够防止调色剂偏移的图像形成装置，包括图像形成机构和定影装置。 定影装置包括固定旋转器，压力旋转器，清洁辊，温度检测器和冷却器。 温度检测器检测固定旋转器，压力旋转器和清洁辊中的至少一个的表面温度。 冷却器基于由温度检测器检测的温度进行操作。 还描述了图像形成方法和图像定影方法。

公开(公告)号：US20050008388A1

公开(公告)日：2005-01-13

申请号：US10843556

申请日：2004-05-12

申请人： Kazunori Karasawa

发明人： Kazunori Karasawa

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G15/20 ,  G03G21/20

CPC分类号： G03G15/2025

摘要： An image forming apparatus capable of preventing toner offset is disclosed that includes an image forming mechanism and a fixing device. The fixing device includes a fixing rotator, a pressure rotator, a cleaning roller, a temperature detector, and a cooler. The temperature detector detects a surface temperature of at least one of the fixing rotator, the pressure rotator, and the cleaning roller. The cooler operates based on the temperature detected by the temperature detector. An image forming method and an image fixing method are also described.

摘要翻译： 公开了一种能够防止调色剂偏移的图像形成装置，包括图像形成机构和定影装置。 定影装置包括固定旋转器，压力旋转器，清洁辊，温度检测器和冷却器。 温度检测器检测固定旋转器，压力旋转器和清洁辊中的至少一个的表面温度。 冷却器基于由温度检测器检测的温度进行操作。 还描述了图像形成方法和图像定影方法。

公开(公告)号：US5500720A

公开(公告)日：1996-03-19

申请号：US175126

申请日：1993-12-29

申请人： Kazunori Karasawa

发明人： Kazunori Karasawa

IPC分类号： G03G15/00 ,  G03G15/02 ,  G03G15/06 ,  G03G15/08 ,  G03G21/14

CPC分类号： G03G15/065

摘要： An image forming apparatus including bias application control which controls bias application to prevent unnecessary toner-adhering to a photosensitive element due to fogging at the start of operation a photosensitive drum for image forming and on completion of operation of the photosensitive drum. Bias control is implemented so that operation of the photosensitive drum starts with a positive development bias voltage applied to both a first development roller and a second development roller from a power source, and a charger for charging the drum turns on. The polarity of applied development bias voltage is then changed from the positive development bias voltage to a negative development bias voltage. Furthermore, a developer drive clutch of the developer unit turns on before a leading edge portion of an electrostatic latent image area on the photosensitive element reaches a position facing the upstream end of the first roller. On completion of the operation of the photosensitive drum, after the trailing edge portion of the electrostatic latent image area passes the position facing the upstream end of the first roller, the developer drive clutch turns off as soon as possible. On the lapse of a predetermined period, the regular negative developing bias voltage is changed to the positive development bias voltage, and the charger for charging the photosensitive turns off.

摘要翻译： 一种图像形成装置，包括偏压施加控制，其控制偏压施加以防止在操作开始时的感光鼓上的感光鼓和感光鼓的操作完成时不必要的调色剂粘附到感光元件上。 实施偏压控制，使得感光鼓的操作以从电源施加到第一显影辊和第二显影辊两者的正显影偏压开始，并且用于对鼓充电的充电器打开。 然后将施加的显影偏压的极性从正显影偏压改变为负显影偏压。 此外，显影单元的显影剂驱动离合器在感光元件上的静电潜像区域的前缘部分到达面向第一辊的上游端的位置之前接通。 在完成感光鼓的操作之后，在静电潜像区域的后缘部分经过面向第一辊的上游端的位置之后，显影剂驱动离合器尽快关闭。 经过预定时间后，正向负显影偏压变为正显影偏压，用于充电的充电器关闭。

公开(公告)号：US5038175A

公开(公告)日：1991-08-06

申请号：US530291

申请日：1990-05-30

申请人： Norimasa Sohmiya ,  Yasushi Koichi ,  Kazunori Karasawa

发明人： Norimasa Sohmiya ,  Yasushi Koichi ,  Kazunori Karasawa

IPC分类号： G03G15/08 ,  G03G15/00

CPC分类号： G03G15/0849 ,  G03G15/5041

摘要： A method of controlling the density of images produced by an electrophotographic image forming apparatus to a constant value. A toner density sensor is provided with a first reference level variable in response to the output of an image density sensor, and a second reference level representative of a state associated with the optimum condition of a developer (e.g. immediately after replacement thereof). During usual control, the toner concentration of the developer is detected on the basis of the output of the toner density sensor, and the toner supply to the developer is controlled on the basis of the result of comparison of the detected toner concentration and the first reference level.

摘要翻译： 一种将由电子照相成像设备产生的图像的浓度控制为恒定值的方法。 调色剂浓度传感器响应于图像浓度传感器的输出而具有第一参考电平变量，以及代表与显影剂的最佳状态相关联的状态的第二参考电平（例如，在其更换之后）。 在通常的控制期间，根据调色剂浓度传感器的输出检测显影剂的调色剂浓度，并且基于检测到的调色剂浓度与第一基准的比较结果来控制对显影剂的调色剂供给 水平。

公开(公告)号：US5006896A

公开(公告)日：1991-04-09

申请号：US431826

申请日：1989-11-06

申请人： Yasushi Koichi ,  Norimasa Sohmiya ,  Kazunori Karasawa

发明人： Yasushi Koichi ,  Norimasa Sohmiya ,  Kazunori Karasawa

IPC分类号： G03G15/00 ,  G03G15/08 ,  G03G21/00

CPC分类号： G03G15/0849 ,  G03G15/5041

摘要： A method applicable to an image forming apparatus which is implemented by an electrophotographic procedure for maintaining that the density of images to be produced by the apparatus is adequate at all times. When the density of a toner image of a reference image or a predetermined pattern sensed by the image density sensor lies in a predetermined adequate range, a sensing level associated with the toner density sensor responsive to the toner density of a developer is not changed. When the density of the toner image does not lie in the adequate range, it is determined that at least the sensing level of the toner density sensing being used at that time has to be changed. Then, whether or not the sensed density of the toner image of the reference image exists in a range in which the image density is controllable is determined. If the sensed density lies in the controllable range, the sensing level of the density sensor being used at that time is suitably changed in response to the sensed density of the toner image. If otherwise, i.e., when the image density sensor is in a fault, toner density control is continued without changing the sensing level of the toner image sensor being used.

摘要翻译： 适用于通过电子照相程序实现的图像形成装置的方法，用于保持由设备产生的图像的密度始终是足够的。 当参考图像的调色剂图像的浓度或由图像浓度传感器感测到的预定图案的浓度处于预定的适当范围时，响应于显影剂的调色剂浓度的与调色剂浓度传感器相关联的感测水平不改变。 当调色剂图像的浓度不在适当的范围内时，确定至少要在此时使用的调色剂浓度感测的感测电平必须改变。 然后，确定参考图像的调色剂图像的感测密度是否存在于图像浓度可控制的范围内。 如果检测到的密度位于可控范围内，则响应于感测到的调色剂图像的密度，适当地改变当时使用的密度传感器的感测电平。 否则，即当图像浓度传感器处于故障时，调色剂浓度控制继续进行，而不改变所使用的调色剂图像传感器的感测电平。

公开(公告)号：US07272354B2

公开(公告)日：2007-09-18

申请号：US11441135

申请日：2006-05-26

申请人： Eisaku Murakami ,  Masami Tomita ,  Masanori Kawasumi ,  Toshio Koike ,  Naohiro Kumagai ,  Atsushi Sampe ,  Takeshi Shintani ,  Masato Yanagida ,  Yutaka Takahashi ,  Hiroya Hirose ,  Shin Hasegawa ,  Hiroyuki Nagashima ,  Takeshi Uchitani ,  Kazunori Karasawa ,  Kentaroh Matsumoto ,  Tokuya Ohjimi ,  Mugijiroh Uno

发明人： Eisaku Murakami ,  Masami Tomita ,  Masanori Kawasumi ,  Toshio Koike ,  Naohiro Kumagai ,  Atsushi Sampe ,  Takeshi Shintani ,  Masato Yanagida ,  Yutaka Takahashi ,  Hiroya Hirose ,  Shin Hasegawa ,  Hiroyuki Nagashima ,  Takeshi Uchitani ,  Kazunori Karasawa ,  Kentaroh Matsumoto ,  Tokuya Ohjimi ,  Mugijiroh Uno

IPC分类号： G03G21/00

CPC分类号： G03G15/166 ,  G03G21/0011 ,  G03G21/0076 ,  G03G2215/1661 ,  G03G2221/001 ,  G03G2221/0042 ,  G03G2221/0089

摘要： A cleaning unit includes a first blade and a second blade. The first blade is in contact with an image carrier or a paper carrier and removes adhered substances remained on surface of these. The second blade has an abrasive layer that is formed by including abrasive particles in an elastic material and is disposed in the downstream side of the first blade. The second blade is allowed to be in contact with the image carrier 1 or the paper carrier. Volume occupancy of abrasive particles in an area of contact of the second blade with either the image carrier or the paper carrier is not less than 50 percent and not more than 90 percent.

摘要翻译： 清洁单元包括第一叶片和第二叶片。 第一叶片与图像载体或纸载体接触并除去残留在其上的附着物质。 第二刀片具有通过将磨料颗粒包括在弹性材料中并且设置在第一刀片的下游侧而形成的研磨层。 允许第二个刀片与图像载体1或纸张载体接触。 第二叶片与图像载体或纸载体的接触区域中的磨粒的体积占有率不小于50％且不大于90％。

公开(公告)号：US06456814B2

公开(公告)日：2002-09-24

申请号：US09783317

申请日：2001-02-15

申请人： Kazunori Karasawa

发明人： Kazunori Karasawa

IPC分类号： G03G1508

CPC分类号： G03G13/09

摘要： A developing device of an image forming apparatus using a two-component developer including toner and carrier includes a developer stirring device to stir the developer to change the toner of the developer, a developing sleeve to rotate and to carry on its surface the developer, and a conductive doctor blade or configured to regulate a thickness of the developer on the developing sleeve. The doctor blade is either grounded or receives a voltage of an electric polarity opposite to that of the toner. An electric potential of the developing sleeve is set to a same electric polarity as that of the toner, and the toner is moved toward a latent image formed on a photoconductor of the image forming apparatus so as to adhere to the latent image by an electric field formed between the developing sleeve and the latent image on the photoconductor. An average particle diameter of the carrier is about 50 &mgr;m or smaller, and a charge amount of the carrier after the developer has been stirred by the stirring device is about 15 &mgr;c/g or greater.

摘要翻译： 使用包括调色剂和载体的双组分显影剂的图像形成装置的显影装置包括显影剂搅拌装置以搅拌显影剂以改变显影剂的调色剂，显影套筒旋转并承载显影剂的表面，以及 导电刮刀或构造成调节显影套筒上显影剂的厚度。 刮刀刀片接地或接收电极极性与调色剂相反的电压。 显影套筒的电位被设定为与调色剂相同的电极性，并且调色剂朝向形成在图像形成装置的感光体上的潜像移动，以便通过电场粘附到潜像 形成在显影套筒和感光体上的潜像之间。 载体的平均粒径为约50μm以下，通过搅拌装置搅拌显影剂后的载体的带电量为约15粘液/ g以上。

公开(公告)号：US06339690B1

公开(公告)日：2002-01-15

申请号：US09614763

申请日：2000-07-12

申请人： Kazunori Karasawa

发明人： Kazunori Karasawa

IPC分类号： G03G2110

CPC分类号： G03G21/105

摘要： An electrophotographic apparatus which forms an electrostatic latent image on a photoreceptor includes a developing device configured to accommodate a two-component developer including toner and carrier and to develop the electrostatic latent image with the developer. Toner which has been used for developing the electrostatic latent image is recycled to the developing device so as to be used again. The developing device includes a developer conveying path so as to convey the recycled toner therethrough. A screening member having openings to screen the recycled toner is arranged in the developer conveying path.

摘要翻译： 在感光体上形成静电潜像的电子照相设备包括：显影装置，其构造成容纳包含调色剂和载体的双组分显影剂，并用显影剂显影静电潜像。 已经用于显影静电潜像的调色剂被再循环到显影装置中以便再次使用。 显影装置包括显影剂输送路径，以便再循环的调色剂通过其输送。 具有用于筛选再循环调色剂的开口的筛分构件布置在显影剂输送路径中。

公开(公告)号：US06141509A

公开(公告)日：2000-10-31

申请号：US990752

申请日：1997-12-15

申请人： Kazunori Karasawa

发明人： Kazunori Karasawa

IPC分类号： G03G15/00 ,  G03G15/08

CPC分类号： G03G15/0849 ,  G03G15/0853 ,  G03G15/5041 ,  G03G2215/00042

摘要： A toner content control device for an electrophotographic apparatus of the type using a toner and carrier mixture. The control device determines an amount of toner replenishment on the basis of a difference between the toner content of the developer and a reference value, while correcting the reference value in accordance with the condition of a reference pattern formed on a photoconductive element. Although the control device includes a toner content sensor and a pattern density sensor, it omits conventional means for adjusting the toner content sensor. The control device is therefore capable of controlling image density stably with an inexpensive configuration.

摘要翻译： 一种使用调色剂和载体混合物的电子照相设备的调色剂含量控制装置。 控制装置基于显影剂的调色剂含量与参考值之间的差异来确定调色剂补充量，同时根据形成在光电导元件上的参考图案的条件来校正参考值。 虽然控制装置包括调色剂含量传感器和图案密度传感器，但省略了用于调节调色剂含量传感器的常规装置。 因此，控制装置能够以廉价的结构稳定地控制图像浓度。