公开(公告)号：US4423134A

公开(公告)日：1983-12-27

申请号：US878749

申请日：1978-02-17

申请人： Seiichi Miyakawa ,  Akira Midorikawa ,  Kenzo Ariyama ,  Susumu Tatsumi

发明人： Seiichi Miyakawa ,  Akira Midorikawa ,  Kenzo Ariyama ,  Susumu Tatsumi

IPC分类号： G03G15/02 ,  G03G15/06 ,  G03G9/04

CPC分类号： G03G15/0266 ,  G03G15/065

摘要： A developing unit for use with an electrophotographic copying apparatus of the type comprising a developing electrode and at least one corona discharger includes a conductive member arranged within a shield casing of the discharger for obtaining a voltage to be applied to the developing electrode as a bias voltage thereto. In the case where an a.c. discharger for charge elimination is being used in addition to the primary discharger, conductive members are incorporated with respective dischargers and the outputs from the conductive members are superimposed on each other and applied to the developing electrode. In this instance, the output of the conductive member associated with the a.c. discharger is continuously applied to the developing electrode after the de-energization of the primary discharger, i.e., the completion of developing an electrostatic latent image to thereby prevent the deposition of toner on the developing electrode.

摘要翻译： 一种与包括显影电极和至少一个电晕放电器的类型的电子照相复印装置一起使用的显影单元，包括布置在放电器的屏蔽壳体内的导电构件，用于获得施加到显影电极的电压作为偏置电压 到此。 在a .c. 除了初级放电器之外，还使用用于消除电荷的放电器，导电部件与相应的放电器并入，并且来自导电部件的输出彼此叠加并施加到显影电极。 在这种情况下，与a.c.相关联的导电构件的输出。 在一次放电器断电之后，即，完成显影静电潜像从而防止调色剂沉积在显影电极上，将放电器连续地施加到显影电极。

公开(公告)号：US4168329A

公开(公告)日：1979-09-18

申请号：US725877

申请日：1976-09-23

申请人： Seiichi Miyakawa ,  Akira Midorikawa ,  Susumu Tatsumi ,  Youtarou Kakitani ,  Toyoo Okamoto ,  Sakae Ota ,  Kenji Kojima

发明人： Seiichi Miyakawa ,  Akira Midorikawa ,  Susumu Tatsumi ,  Youtarou Kakitani ,  Toyoo Okamoto ,  Sakae Ota ,  Kenji Kojima

IPC分类号： G03G13/10 ,  G03G15/00 ,  G03G15/06 ,  G03G15/10

CPC分类号： G03G15/065

摘要： An auto-bias developing process for developing an electrostatic latent image formed on a photosensitive member which includes the step of storing a detected potential in order to apply a fixed bias potential to a developing electrode plate wherein the surface potential of a photosensitive member is detected through a developing solution by a sensor electrode, and is stored in a memory circuit for subsequent conversion to a fixed bias potential which corresponds to the detected potential and is applied to the developing electrode. The process also includes the step of removing any toner which attaches to the developing electrode plate, by the application of a reverse bias potential thereto when the developing process is not taking place and the step of rendering the developing electrode plate electrically floating for removing toner from the plate and preventing deposition of toner onto the surface of the photosensitive member.

摘要翻译： 一种用于显影形成在感光构件上的静电潜像的自偏压显影工艺，其包括存储检测电位的步骤，以便对显影电极板施加固定的偏压电位，其中感光构件的表面电位通过 通过传感器电极的显影液，并存储在存储电路中，用于随后转换成对应于检测电位的固定偏置电位并施加到显影电极。 该方法还包括当显影过程不发生时通过向其施加反向偏压电位而除去附着到显影电极板的任何调色剂的步骤，以及使显影电极板电浮动以除去调色剂的步骤 并且防止调色剂沉积到感光构件的表面上。

公开(公告)号：US4640129A

公开(公告)日：1987-02-03

申请号：US726166

申请日：1985-04-22

申请人： Seiichi Miyakawa ,  Susumu Tatsumi ,  Koji Sakamoto

发明人： Seiichi Miyakawa ,  Susumu Tatsumi ,  Koji Sakamoto

IPC分类号： G01N11/06 ,  G03G15/08 ,  G03G9/10

CPC分类号： G01N11/06 ,  G03G15/0849 ,  G03G15/0853 ,  G03G15/0855 ,  Y10S222/01

摘要： A method of detecting the toner concentration of a two-component developer comprising a mixture of carrier particles and toner particles for use in an electrostatic copying apparatus or the like wherein a relationship between flow rate and the toner concentration of a two-component developer which passes through a container is obtained in advance, then the flow rate of the two-component developer whose toner concentration is unknown is measured by use of the container and developer flow rate detecting member. Thus, the toner concentration of the developer is determined from the measured flow rate and the relationship between the flow rate and the toner concentration which has been obtained in advance.

摘要翻译： 一种检测包含用于静电复印设备等中的载体颗粒和调色剂颗粒的混合物的双组分显影剂的调色剂浓度的方法，其中流速与通过的双组分显影剂的调色剂浓度之间的关系 通过预先获得容器，则通过使用容器和显影剂流量检测构件测量调色剂浓度未知的双组分显影剂的流速。 因此，显影剂的调色剂浓度由预先获得的测量流速和流速与调色剂浓度之间的关系确定。

公开(公告)号：US4195260A

公开(公告)日：1980-03-25

申请号：US875345

申请日：1978-02-06

申请人： Koji Sakamoto ,  Seiichi Miyakawa ,  Susumu Tatsumi

发明人： Koji Sakamoto ,  Seiichi Miyakawa ,  Susumu Tatsumi

IPC分类号： G03G15/08 ,  G01N9/00

CPC分类号： G03G15/0853 ,  G03G15/0849 ,  G03G15/0855 ,  Y10S222/01

摘要： Deterioration of a dry developing substance causes toner particles to be so strongly adhered to carrier particles that they cannot be readily separated therefrom. The present apparatus comprises means for applying a predetermined electrostatic or air suction force to the developer to readily remove toner therefrom except for spent toner particles strongly adhered to the carrier particles. The toner density, or the ratio of toner to carrier particles, is then measured electromagnetically or optically and compared to a reference value. The developer deterioration determines what proportion of toner will be removed from the developer by said force and thereby the subsequently sensed toner density. The higher the sensed toner density, the greater the degree of deterioration.

摘要翻译： 干发展物质的劣化导致调色剂颗粒如此强烈地粘附到载体颗粒上，使其不能容易地与载体颗粒分离。 本装置包括用于向显影剂施加预定的静电或空气抽吸力以便容易地除去调色剂的装置，除了与载体颗粒强烈粘附的废调色剂颗粒之外。 然后调色剂密度或调色剂与载体颗粒的比例以电磁或光学方式测量，并与参考值进行比较。 显影剂劣化确定通过所述力从显影剂中除去调色剂的比例，从而确定随后感测到的调色剂浓度。 感测到的调色剂浓度越高，劣化程度越大。

公开(公告)号：USRE32330E

公开(公告)日：1987-01-13

申请号：US552868

申请日：1983-11-18

申请人： Seiichi Miyakawa ,  Susumu Tatsumi ,  Koji Sakamoto

发明人： Seiichi Miyakawa ,  Susumu Tatsumi ,  Koji Sakamoto

IPC分类号： G03G15/06

CPC分类号： G03G15/065

摘要： A method of maintaining the correct conditions of an electrophotographically duplicated image, which uses a reference plate having at least a dark-tone area and a light-tone area and in which signals associated with the reference plate are detected and synthesized to control the duplicating process conditions such as developing bias potential, charge, exposure and of the optical system so that an optimum image may be produced.

公开(公告)号：US4226525A

公开(公告)日：1980-10-07

申请号：US843108

申请日：1977-10-18

申请人： Koji Sakamoto ,  Seiichi Miyakawa ,  Susumu Tatsumi

发明人： Koji Sakamoto ,  Seiichi Miyakawa ,  Susumu Tatsumi

IPC分类号： G03G15/00 ,  G03G15/08

CPC分类号： G03G15/5037 ,  G03G15/0849 ,  G03G15/0853 ,  Y10S222/01

摘要： An exposure unit radiates a light image of an original document onto a charged photoconductive member to form an electrostatic image through localized photoconduction. A developing unit applies a powdered developing substance comprising carrier particles and toner particles to the photoconductive member to develop the electrostatic image and produce a toner image which is transferred and fixed to a copy sheet to produce a permanent reproduction of the original document. The tone density, or the ratio of toner particles to carrier particles in the developing substance is electromagnetically measured, and the developing ability of the developing substance is opticaly measured. The developing substance is replaced when the difference between the toner density and developing ability exceeds a predetermined value. Prior to exposure with the light image a reference electrostatic image is formed on the photoconductive member and the electrostatic potential thereof is measured. The intensity of the light image of the original document and/or a developing bias voltage are regulated in accordance with the sensed electrostatic potential. The reference image may be of a reference surface having a predetermined optical density or a portion of the original document produced by reverse optical scanning.

摘要翻译： 曝光单元将原稿的光图像照射到带电的光导体上，以通过局部光电导体形成静电图像。 显影单元将包含载体颗粒和调色剂颗粒的粉末显影物质施加到感光体以显影静电图像，并产生转印并固定到复印纸上的调色剂图像，以产生原稿的永久再现。 色调密度或显影物质中调色剂颗粒与载体颗粒的比例被电磁测量，并且显影物质的显影能力被光学测量。 当调色剂浓度和显影能力之间的差异超过预定值时，显影物质被替换。 在用光图像曝光之前，在感光体上形成参考静电图像，并测量其静电电位。 原始文件的光图像的强度和/或显影偏压根据感测到的静电电位来调节。 参考图像可以是具有预定光密度的参考表面或通过反向光学扫描产生的原始文档的一部分。

公开(公告)号：US4139299A

公开(公告)日：1979-02-13

申请号：US671835

申请日：1976-03-30

申请人： Seiichi Miyakawa ,  Susumu Tatsumi

发明人： Seiichi Miyakawa ,  Susumu Tatsumi

IPC分类号： G03G13/10 ,  G03G15/06 ,  G03G15/10

CPC分类号： G03G15/065

摘要： The process and device are for use in an electrophotographic copying machine using a developing agent of liquid type. A counter-electrode is maintained closely spaced from the peripheral surface of a photosensitive drum bearing an electrostatic latent image thereon and itself electrically floating. The developing solution, which inherently has a substantial conductivity is supplied into the space between the drum surface and the counter-electrode so as to develop the latent image. During the development of latent image, a weak d.c. current flow, is passed between the counter-electrode and the drum through the segment of the developing solution filling the space so that a good relation between potentials on the drum surface and the counter-electrode is obtained to eliminate background smearing. The d.c. current may be controlled to decrease in value as the induced potential on the counter-electrode increases.

摘要翻译： 该方法和装置用于使用液体型显影剂的电子照相复印机。 维持与感光鼓的外周表面紧密间隔的对电极，其上具有静电潜像并且其自身电浮动。 固有地具有大量导电性的显影液被提供到鼓表面和对电极之间的空间中，以便显影潜像。 在潜像的发展过程中， 电流通过填充空间的显影液的段在对电极和滚筒之间通过，从而获得鼓表面上的电位与对电极之间良好的关系，以消除背景污迹。 直径 当对电极上的感应电位增加时，电流可以被控制为降低。

公开(公告)号：US4306804A

公开(公告)日：1981-12-22

申请号：US64154

申请日：1979-08-06

申请人： Koji Sakamoto ,  Seiichi Miyakawa ,  Susumu Tatsumi

发明人： Koji Sakamoto ,  Seiichi Miyakawa ,  Susumu Tatsumi

IPC分类号： G03G15/00 ,  G03G15/08

CPC分类号： G03G15/5037 ,  G03G15/0849 ,  G03G15/0853 ,  Y10S222/01

摘要： An exposure unit radiates a light image of an original document onto a charged photoconductive member to form an electrostatic image through localized photoconduction. A developing unit applies a powdered developing substance comprising carrier particles and toner particles to the photoconductive member to develop the electrostatic image and produce a toner image which is transferred and fixed to a copy sheet to produce a permanent reproduction of the original document. Prior to exposure with the light image a reference electrostatic image is formed on the photoconductive member and the electrostatic potential thereof is measured. The intensity of the light image of the original document and/or a developing bias voltage are regulated in accordance with the sensed electrostatic potential. The reference image may be of a reference surface having a predetermined optical density or a portion of the original document produced by reverse optical scanning.

摘要翻译： 曝光单元将原稿的光图像照射到带电的光导体上，以通过局部光电导体形成静电图像。 显影单元将包含载体颗粒和调色剂颗粒的粉末显影物质施加到感光体以显影静电图像，并产生转印并固定到复印纸上的调色剂图像，以产生原稿的永久再现。 在用光图像曝光之前，在感光体上形成参考静电图像，并测量其静电电位。 原始文件的光图像的强度和/或显影偏压根据感测到的静电电位来调节。 参考图像可以是具有预定光密度的参考表面或通过反向光学扫描产生的原始文档的一部分。

公开(公告)号：US4215930A

公开(公告)日：1980-08-05

申请号：US880175

申请日：1978-02-22

申请人： Seiichi Miyakawa ,  Susumu Tatsumi ,  Koji Sakamoto

发明人： Seiichi Miyakawa ,  Susumu Tatsumi ,  Koji Sakamoto

IPC分类号： G03G15/06 ,  G03G15/00

CPC分类号： G03G15/065

摘要： A method of maintaining the correct conditions of an electrophotographically duplicated image, which uses a reference plate having at least a dark-tone area and a light-tone area and in which signals associated with the reference plate are detected and synthesized to control the duplicating process conditions such as developing bias potential, charge, exposure and of the optical system so that an optimum image may be produced.

摘要翻译： 一种维持电子照相复制图像的正确条件的方法，其使用具有至少一个暗色调区域和一个光色调区域的参考板，并且其中检测和合成与参考板相关联的信号以控制复制过程 诸如显影偏置电位，电荷，曝光和光学系统的条件，使得可以产生最佳图像。

公开(公告)号：US3980049A

公开(公告)日：1976-09-14

申请号：US653155

申请日：1976-01-28

申请人： Susumu Tatsumi ,  Seiichi Miyakawa

发明人： Susumu Tatsumi ,  Seiichi Miyakawa

IPC分类号： G03G13/10 ,  G03G15/06 ,  G03G15/10

CPC分类号： G03G15/065

摘要： A developing unit for use with electrophotographic copying apparatus which uses a developing electrode for preventing unfavorable results such as edge effect, missing of fine lines, etc. A pair of conductor plates are maintained one behind the other and face a photosensitive surface of a photoreceptor carrying an electrostatic latent image, the conductor plate remote from the surface being connected to the ground directly or through a constant voltage source, with respective portions of the developer used filling the spaces between the plates and photoreceptor which may constitute a voltage divider, thus maintaining the function of the divider irrespective of variations in the resistances of such filling fractions of the developer with aging, environmental factors, etc. thus obtained potential on the other conductor plate provides a stable index of the potential to be applied to the developing electrode. The latter conductor plate itself may be consistent with the developing electrode.

摘要翻译： 一种用于电子照相复印设备的显影单元，其使用显影电极来防止不利的结果，例如边缘效应，缺少细纹等。一对导体板一个接一个地保持，并且面对感光体的感光表面 静电潜像，远离表面的导体板直接或通过恒定电压源连接到地面，显影剂的各个部分填充了可能构成分压器的板和感光体之间的空间，从而保持 不管老化时的显影剂的填充部分的电阻的变化，环境因素等，分隔器的功能如何，因此在另一个导体板上获得的电位提供了施加到显影电极的电位的稳定指标。 后一导体板本身可以与显影电极一致。