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81.发明授权
公开(公告)号：US5365316A
公开(公告)日：1994-11-15
申请号：US107593
申请日：1993-08-18
CPC分类号： G03G15/80 , G03G15/0283 , G03G15/065
摘要： An image forming apparatus includes: a photosensitive drum; a charging unit which is brought into contact with the drum and charges it; a developing unit for obtaining a visible image from an electrostatic latent image formed on the drum; a charge high voltage generation circuit for supplying an output which is obtained by multiplexing a high AC voltage with a high DC voltage with the charging unit; a development high voltage generation circuit for supplying an output which is obtained by multiplexing a high AC voltage with a high DC voltage to the developing unit; and a sync circuit for synchronizing a high voltage alternating current of the charge high voltage generation circuit and a high voltage alternating current of the development high voltage generation circuit. A ratio of the frequencies of the high voltage alternating currents of the development high voltage generation circuit and the charge high voltage generation circuit is set to an integer. The high AC voltages are derived from the signals having an integer frequency dividing ratio which are obtained by frequency dividing the same clock signal.
摘要翻译： 图像形成装置包括：感光鼓; 充电单元，其与鼓接触并对其进行充电; 显影单元，用于从形成在所述滚筒上的静电潜像获得可视图像; 一个充电高电压产生电路，用于提供通过将高交流电压与高直流电压复用而获得的输出与充电单元; 用于向显影单元提供通过将具有高DC电压的高AC电压复用获得的输出的显影高电压产生电路; 以及同步电路，用于使充电高压发生电路的高电压交流电和显影高压发生电路的高压交流电流同步。 显影高压发生电路和充电高压发生电路的高压交流电流的频率之比设定为整数。 高交流电压由具有通过对相同时钟信号进行分频而获得的整数分频比的信号导出。
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公开(公告)号：US4962307A
公开(公告)日：1990-10-09
申请号：US340534
申请日：1989-04-19
申请人： Masahide Nakaya
发明人： Masahide Nakaya
CPC分类号： H01T19/00 , G03G15/0283 , G03G15/0291
摘要： A corona discharging device for an electrophotographic copier, laser printer or similar image forming equipment of the type using an electrophotographic procedure. The device has a corona wire, a rear electrode, and a dielectric plate intervening between the corona wire and the rear electrode. A pulse voltage is applied across the corona wire and rear electrode, while a DC bias voltage is applied across the corona wire and a photoconductive element which is located in close proximity to the corona discharging device. A current for charging the photoconductive element is controlled to a predetermined constant value. When the charging current is lowered below a predetermined value or when the DC bias voltage is increased above a predetermined value or decreased below a predetermined value, a high-tension power supply stops feeding a high voltage by deciding that an output is open or short-circuited.
摘要翻译： 用于电子照相复印机，激光打印机或使用电子照相方法的类似成像设备的电晕放电装置。 该装置具有电晕丝，后电极和介于电晕丝和后电极之间的电介质板。 在电晕丝和后电极之间施加脉冲电压，同时在电晕丝和跨接电晕放电装置之间的光电元件施加DC偏置电压。 将感光元件充电的电流控制在预定的常数值。 当充电电流降低到预定值以下或当DC偏置电压升高到超过预定值或降低到预定值以下时，高压电源通过判定输出断开或短路来停止供给高电压， 电路
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公开(公告)号：US4339783A
公开(公告)日：1982-07-13
申请号：US32028
申请日：1979-04-20
CPC分类号： G03G15/1635 , G03G15/0283 , G03G15/0291 , G03G21/06
摘要： An electrophotographic apparatus employs an alternating current corona discharge apparatus for the purpose of forming an electrostatic image on a photosensitive member. The alternating current corona discharge apparatus has a transformer for transforming or stepping up the alternating current source voltage, the secondary winding of which is connected to the ground at one end. The secondary winding is shunted by a series connection of a first plurality of varistors. A smaller second plurality of series connected varistors selected from the first plurality of series connected varistors are shunted by a first diode-resistor series connection of a diode with the cathode on the ground side and a variable resistor and a smaller and third plurality of different series connected varistors selected from the first plurality of series connected varistors are shunted by a second diode-resistor series connection of a diode with the anode on the ground side and a variable resistor. The non-grounded end of the secondary winding is connected to a wire electrode of the corona discharge apparatus and the grounded end of the secondary winding is connected to a shield plate enclosing the wire electrode.
摘要翻译： 电摄影装置采用交流电晕放电装置，用于在感光构件上形成静电图像。 交流电晕放电装置具有用于变换或提升交流电源电压的变压器，其二次绕组在一端连接到地面。 次级绕组由第一多个压敏电阻的串联连接分流。 从第一多个串联连接的变阻器中选择的较小的第二多个串联连接的变阻器通过二极管与接地侧的阴极的第一二极管 - 电阻器串联连接和可变电阻器以及较小和第三多个不同系列 从第一组多个串联连接的变阻器中选择的连接的变阻器被二极管与接地侧的阳极和可变电阻器的第二二极管 - 电阻串联连接分流。 次级绕组的非接地端连接到电晕放电装置的线电极，次级绕组的接地端连接到封闭线电极的屏蔽板。
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公开(公告)号：US4140962A
公开(公告)日：1979-02-20
申请号：US804954
申请日：1977-06-09
申请人： Halsey P. Quinn
发明人： Halsey P. Quinn
CPC分类号： G03G15/0283 , G05F1/63 , Y10S323/902
摘要： A high voltage power supply is regulated using a light dependent resistor. A feedback circuit from the load controls the input to a light emitting diode which is optically coupled to a light dependent resistor connected in series with the load. Increases in the load current tend to reduce illumination on the light dependent resistor, thereby increasing the resistance of that circuit element which reduces the load current. The converse is also true. Regulation may be applied to a D.C. power source or to an A.C. power source by developing a signal indicative of average current level and applying it to the light emitting diode to control the light dependent resistor. The high voltage power control of the invention is particularly useful in regulating corotron voltage levels in a xerographic reproduction device.
摘要翻译： 高压电源使用光依赖电阻进行调节。 来自负载的反馈电路将输入控制到发光二极管，发光二极管光耦合到与负载串联连接的光依赖电阻器。 负载电流的增加往往会降低对光依赖电阻的照射，从而增加该电路元件的电阻，从而降低负载电流。 相反也是如此。 通过开发指示平均电流电平的信号并将其施加到发光二极管以控制光依赖电阻器，可以将调节应用于直流电源或交流电源。 本发明的高压功率控制在静电复印装置中调节转运电压电压特别有用。
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公开(公告)号：US3591846A
公开(公告)日：1971-07-06
申请号：US3591846D
申请日：1968-10-17
申请人： SINGER CO
发明人： SCHAFFER DETLEF
CPC分类号： G03G15/80 , G03G15/0283 , G03G15/0291 , Y10T307/406
摘要： A power supply is disclosed which provides a plurality of highvoltage DC outputs suitable for driving the corona voltage units located at the charging, developing, and transferring stations of an electrophotographic copying apparatus. Each of the outputs is electrically isolated from the others by means of individual rectifying and isolating diodes to prevent voltage fluctuations appearing at any one of the outputs from being communicated to and adversely affecting the voltage at any of the other outputs.
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86.发明授权Process of and apparatus for printing or copying by electrostatic photography 失效通过静电摄影进行印刷或复印的工艺和设备
公开(公告)号：US3054897A
公开(公告)日：1962-09-18
申请号：US67846657
申请日：1957-08-16
申请人： MASON & SONS LTD E N
IPC分类号： G03G15/02
CPC分类号： G03G15/0283 , Y10S430/102
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公开(公告)号：US20240168401A1
公开(公告)日：2024-05-23
申请号：US18302198
申请日：2023-04-18
发明人： Yuki NAGAMORI , Go MIURA , Hirotaka TANAKA
IPC分类号： G03G15/02
CPC分类号： G03G15/0258 , G03G15/0283
摘要： A charging device includes: a housing having a U-shaped cross-section, disposed such that an opening thereof faces a surface of a rotating image carrier, and extending in an axial direction of the image carrier; a discharge electrode configured to charge the surface, the discharge electrode being attached to the housing, inside the housing, and extending in the axial direction; and a cleaner having a protrusion that comes into contact with a bottom plate of the housing and configured to move in the axial direction to clean the discharge electrode in a state in which the protrusion is in contact with the bottom plate, regardless of whether the opening in the housing faces upward or downward.
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公开(公告)号：US20230266692A1
公开(公告)日：2023-08-24
申请号：US18111716
申请日：2023-02-20
发明人： Masayuki OTSUKA
IPC分类号： G03G15/02
CPC分类号： G03G15/0266 , G03G15/0283
摘要： An image forming apparatus according to this disclosure includes: a charging roller that charges a surface of a photoconductor drum; a development unit that forms a toner image on the surface of the photoconductor drum; an image density sensor that detects density of the formed toner image; a charge power supply that applies a bias voltage to the charging roller; a development power supply that applies a bias voltage to the development unit; and a controller. The controller causes the charge and development power supplies to output respective predetermined bias voltages for predetermined time, and is capable of executing a contact and separation determination mode in which a contact and separation state of the charging roller is determined based on whether or not an image is detected by the image density sensor after output of the respective bias voltages.
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公开(公告)号：US10061222B2
公开(公告)日：2018-08-28
申请号：US15486263
申请日：2017-04-12
申请人： Yuki Sato
发明人： Yuki Sato
CPC分类号： G03G15/0233 , F16F1/047 , F16F1/06 , F16F1/123 , F16F1/125 , F16F1/128 , F16F2232/08 , F16F2238/026 , G03G15/0283
摘要： A coil spring includes a resilient portion having a first diameter defined by a first central axis that is hypothetical and an end coil abutting on one end of the resilient portion in an axial direction of the resilient portion. The end coil has a second diameter defined by a second central axis that is hypothetical and shifted from the first central axis of the resilient portion in parallelism with the first central axis of the resilient portion by a predetermined shift amount. A coupler has a first width that is smaller than the first diameter of the resilient portion and greater than a second width obtained by subtracting the predetermined shift amount from the first diameter of the resilient portion. The coupler is inserted into the end coil to secure the end coil to the coupler.
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公开(公告)号：US20180217546A1
公开(公告)日：2018-08-02
申请号：US15827244
申请日：2017-11-30
申请人： Yuuji NAGAMATSU
发明人： Yuuji NAGAMATSU
IPC分类号： G03G15/00
CPC分类号： G03G15/5045 , G03G15/0283 , G03G15/80 , G03G21/203
摘要： An image forming apparatus includes a high-voltage power supply that supplies high-voltage electric power, a charging device that is charged by the electric power supplied from the high-voltage power supply, a photoconductor that carries an image to be formed on a recording medium, with the electric power supplied from the charging device, a temperature sensor disposed at a distant from the photoconductor that detects temperature inside the image forming apparatus, a humidity sensor disposed at a distant from the photoconductor that detects inside the image forming apparatus, and circuitry that outputs a signal for commanding an electric power value to the high-voltage power supply to cause the high-voltage power supply to supply the electric power with the electric power value, and controls supply of the electric power based on an electric power value feedback signal from the high-voltage power supply.
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