公开(公告)号：US20130129369A1

公开(公告)日：2013-05-23

申请号：US13683205

申请日：2012-11-21

申请人： SHARP KABUSHIKI KAISHA

发明人： Norihide MOMOSE ,  Kenji SUGIMURA

IPC分类号： G03G15/08

CPC分类号： G03G13/02 ,  G03G15/065

摘要： An image forming apparatus is provided with a high-voltage substrate, a motor and a DC power source. The high-voltage substrate has a developing positive bias circuit and a developing reverse bias circuit which are connected to each other in parallel, in which the developing positive bias voltage is combined with developing reverse bias voltage to generate developing bias voltage. The high-voltage substrate includes a interruption switch for interrupting a reverse current from the motor to the developing reverse bias circuit in a case where an interlock switch is turned off at the time of emergency stop, in which, when the reverse current is interrupted by the interruption switch, electric power that is accumulated in the capacitor is supplied to the developing positive bias circuit to apply the developing positive bias voltage as the developing bias voltage to the developing roller for a given length of time.

摘要翻译： 图像形成装置设置有高压基板，电动机和直流电源。 高电压基板具有显影正偏置电路和显影反向偏置电路，它们彼此并联连接，其中显影正偏置电压与显影反向偏置电压组合以产生显影偏压。 高压基板包括用于在紧急停止时互锁开关断开的情况下中断从电动机向显影反向偏置电路的反向电流的中断开关，其中当反向电流被中断时 中断开关，积聚在电容器中的电力被提供给显影正偏置电路，以将显影正偏压作为显影偏压施加到显影辊上一段给定的时间长度。

公开(公告)号：US08437678B2

公开(公告)日：2013-05-07

申请号：US12552892

申请日：2009-09-02

申请人： Kazunari Hagiwara ,  Norio Takahashi ,  Katsuhiro Sakaizawa ,  Rie Endo

发明人： Kazunari Hagiwara ,  Norio Takahashi ,  Katsuhiro Sakaizawa ,  Rie Endo

IPC分类号： G03G21/00

CPC分类号： G03G15/065 ,  G03G15/0812

摘要： An image forming apparatus includes a developer bearing member configured to bear a developer to develop a latent image, a developer regulating member configured to regulate an amount of the developer carried on the bearing member, a voltage application unit that can apply a plurality of direct current voltages of different values between the bearing member and the regulating member, and a current detection unit that can detect a plurality of direct currents of different values flowing in the regulating member when the voltage application unit applies the plurality of direct current voltages, wherein the image forming apparatus sets a direct current voltage value Vb applied by the voltage application unit when developing the latent image, so that the following expression is satisfied: |Vb|>|Vbmin|, where Vbmin indicates a direct current voltage value when the direct current detected by the current detection unit is a minimum value.

公开(公告)号：US08433211B2

公开(公告)日：2013-04-30

申请号：US12879390

申请日：2010-09-10

申请人： Masanori Horike ,  Tetsuro Hirota ,  Atsushi Kurokawa ,  Hideki Kosugi ,  Masaaki Yamada ,  Yoshiko Ogawa ,  Yuji Ishikura

发明人： Masanori Horike ,  Tetsuro Hirota ,  Atsushi Kurokawa ,  Hideki Kosugi ,  Masaaki Yamada ,  Yoshiko Ogawa ,  Yuji Ishikura

IPC分类号： G03G15/06

CPC分类号： G03G15/065 ,  G03G15/0818 ,  G03G2215/00776 ,  G03G2215/0651

摘要： A disclosed developing device includes a toner carrying member having electrodes, a toner supply unit supplying the toner to the toner carrying member, and a hopping electric field generator unit generating electric field to cause the toner hopping on the toner carrying member by applying a pulse voltage to the electrodes. The hopping electric field generator unit includes a pulse voltage generator circuit generating the pulse voltage, a first direct-current power source supplying bias to the pulse voltage generator circuit for regulating a peak value of the pulse voltage, and a second direct-current power source having a same polarity with a toner charging polarity, and outputting a variable voltage level. The hopping electric field generator unit controls the peak value of the pulse voltage by changing an output of the first power source and a mean thereof by changing an output of the second power source.

摘要翻译： 所公开的显影装置包括具有电极的调色剂承载构件，向调色剂承载构件供应调色剂的调色剂供应单元和产生电场的跳跃电场发生器单元，以通过施加脉冲电压使调色剂跳动到调色剂承载构件上 到电极。 跳频电场发生器单元包括产生脉冲电压的脉冲电压发生器电路，向脉冲电压发生器电路提供偏置以调节脉冲电压的峰值的第一直流电源和第二直流电源 具有与调色剂充电极性相同的极性，并输出可变电压电平。 跳频电场发生器单元通过改变第二电源的输出来改变第一电源的输出及其平均值来控制脉冲电压的峰值。

公开(公告)号：US20130034360A1

公开(公告)日：2013-02-07

申请号：US13564404

申请日：2012-08-01

申请人： Kunio FURUKAWA

发明人： Kunio FURUKAWA

IPC分类号： G03G15/08

CPC分类号： G03G15/065 ,  G03G15/0813 ,  G03G15/0907 ,  G03G15/80 ,  G03G2215/0132

摘要： An image forming apparatus having; a latent image support member; a latent image forming unit for forming an electrostatic latent image on the latent image support member; a developer support member for supplying toner to the latent image support member to develop the electrostatic latent image; a voltage applying device for applying a developing bias, which is a superimposed voltage of a DC voltage and an AC voltage, to the developer support member; a first selecting device for selecting a screen ruling; and a second selecting device for selecting a frequency of the AC voltage. The second selecting device selects a first frequency when the first selecting device selects a first screen ruling, and selects a second frequency lower than the first frequency when the first selecting device selects a second screen ruling higher than the first screen ruling.

摘要翻译： 一种图像形成装置，具有： 潜像支撑构件; 潜像形成单元，用于在潜像支撑构件上形成静电潜像; 显影剂支撑构件，用于向潜像支撑构件供应调色剂以显影静电潜像; 施加显影偏压的电压施加装置，所述显影偏压是直流电压和交流电压的叠加电压; 用于选择屏幕裁定的第一选择装置; 以及用于选择所述AC电压的频率的第二选择装置。 当第一选择装置选择第一屏幕规则时，第二选择装置选择第一频率，并且当第一选择装置选择比第一屏幕规则高的第二屏幕规则时，选择低于第一频率的第二频率。

公开(公告)号：US20130022365A1

公开(公告)日：2013-01-24

申请号：US13547491

申请日：2012-07-12

申请人： Masashi Fujishima

发明人： Masashi Fujishima

IPC分类号： G03G15/08

CPC分类号： G03G15/065 ,  G03G15/0806 ,  G03G15/0808 ,  G03G21/00 ,  G03G2215/00734

摘要： An image forming apparatus includes a separating unit for performing a stripping operation of forcibly returning toner particles carried on a toner bearing member to a developer bearing member, a sheet size discriminator for discriminating whether a sheet is a standard sized sheet or a long sheet, a determiner for determining whether or not there is any blank area of a predetermined length or longer in the sub scanning direction, where no toner image is to be substantially transferred, for each long sheet, and a controller for controlling the stripping operation. The controller causes the separating unit to perform the stripping operation at a developing timing of an electrostatic latent image corresponding to the blank area to be formed on the image bearing member when the sheet is a long sheet and when the blank area of the predetermined length or longer is present.

摘要翻译： 图像形成装置包括：分离单元，用于执行强制将携带在调色剂承载部件上的调色剂颗粒返回到显影剂承载部件的剥离操作;片材尺寸鉴别器，用于鉴别片材是标准尺寸片材还是长片材; 确定器，用于确定每个长片材是否在副扫描方向上没有任何空白区域的预定长度或更长的空间区域，其中不需要基本上转印调色剂图像;以及控制器，用于控制剥离操作。 控制器使得分离单元在片材是长片材时，当图像承载部件上形成的空白区域的静电潜像的显影定时处于预定长度的空白区域或 时间越长。

公开(公告)号：US08346109B2

公开(公告)日：2013-01-01

申请号：US12511438

申请日：2009-07-29

申请人： Tsutomu Yamane

发明人： Tsutomu Yamane

IPC分类号： G03G15/06 ,  G03G15/08

CPC分类号： G03G15/065 ,  G03G2215/0634

摘要： An image forming apparatus includes an image supporting member; a developer supporting member for attaching developer to a static latent image formed on a surface of the image supporting member; a developer layer forming member for forming a developer layer on the developer supporting member; a developer supply member for supplying developer to the developer supporting member; a developer supporting member voltage applying unit for applying a voltage to the developer supporting member; a developer supplying member voltage applying unit for applying a voltage to the developer supplying member; and a reset operation processing unit for setting a reset mode over a specific period of time, so that a bias difference in the reset mode between the voltage applied with the developer supporting member voltage applying unit and the voltage applied with the developer supplying member voltage applying unit becomes smaller than that in a printing mode.

摘要翻译： 图像形成装置包括：图像支撑部件; 用于将显影剂附着到形成在图像支撑构件的表面上的静电潜像的显影剂支撑构件; 用于在显影剂支撑构件上形成显影剂层的显影剂层形成构件; 用于将显影剂供应到显影剂支撑构件的显影剂供应构件; 用于向显影剂支撑构件施加电压的显影剂支撑构件电压施加单元; 显影剂供应构件电压施加单元，用于向显影剂供应构件施加电压; 以及复位操作处理单元，用于在特定时间段内设置复位模式，使得施加在显影剂支撑构件电压施加单元上的电压和施加有显影剂供应构件的电压之间的复位模式中的偏差差施加 单位变得比打印模式小。

公开(公告)号：US08311429B2

公开(公告)日：2012-11-13

申请号：US12179449

申请日：2008-07-24

申请人： Yasuhiko Okumura

发明人： Yasuhiko Okumura

IPC分类号： G03G15/06 ,  G03G15/08

CPC分类号： G03G15/5004 ,  G03G15/065

摘要： An image forming apparatus includes a charging device to electrically charge a photosensitive member, an exposure unit to expose the charged photosensitive member to light, a development device to develop, with a developer, a latent image formed on the photosensitive member by the exposure unit, and a development bias voltage generating circuit to apply a development bias voltage to the development device. The development bias voltage generating circuit includes a transformer, a capacitor connected to one end of the transformer, first-fourth switching elements, a power source to supply a voltage to the first and third switching elements, and a control unit to control an on and off action of the first to fourth switching elements and independently control the voltages applied by the power source to the first and third switching elements.

摘要翻译： 图像形成装置包括：对感光构件进行充电的充电装置，曝光单元以将充电的感光构件曝光;显影装置，用显影剂显影由曝光单元形成在感光构件上的潜像; 以及显影偏压产生电路，用于向显影装置施加显影偏压。 显影偏压生成电路包括变压器，连接到变压器的一端的电容器，第一至第四开关元件，向第一和第三开关元件提供电压的电源，以及控制单元， 第一至第四开关元件的断开动作，并且独立地控制由电源施加到第一和第三开关元件的电压。

公开(公告)号：US08285163B2

公开(公告)日：2012-10-09

申请号：US12726622

申请日：2010-03-18

申请人： Kazushi Shumiya ,  Katsumi Inukai

发明人： Kazushi Shumiya ,  Katsumi Inukai

IPC分类号： G03G15/06

CPC分类号： G03G15/065 ,  G03G15/55

摘要： A high-voltage power supply for applying a developing bias to a developing roller of an image forming apparatus is provided. The high-voltage power supply includes: a developing bias application unit that applies a developing bias to the developing roller in accordance with a control voltage that is input therein; a developing bias detection unit that detects the developing bias applied to the developing roller; a control voltage adjustment unit that adjusts the control voltage input to the developing bias application unit such that the developing bias detected by the developing bias detection unit approaches a predetermined target value; and a condensation determination unit that determines condensation of the developing bias application unit based on the control voltage.

摘要翻译： 提供了用于将显影偏压施加到图像形成装置的显影辊的高压电源。 高压电源包括：显影偏压施加单元，其根据输入的控制电压对显影辊施加显影偏压; 显影偏压检测单元，其检测施加到显影辊的显影偏压; 控制电压调整单元，其调节输入到显影偏压施加单元的控制电压，使得由显影偏压检测单元检测到的显影偏压接近预定的目标值; 以及冷凝判定单元，其基于所述控制电压来确定所述显影偏压施加单元的冷凝。

公开(公告)号：US20120251187A1

公开(公告)日：2012-10-04

申请号：US13493022

申请日：2012-06-11

申请人： Shougo Sato ,  Takeyuki Takagi ,  Naoya Kamimura

发明人： Shougo Sato ,  Takeyuki Takagi ,  Naoya Kamimura

IPC分类号： G03G15/08

CPC分类号： G03G15/065 ,  G03B21/18 ,  G03G15/0865 ,  G03G21/1647 ,  G03G21/1652 ,  G03G21/1676 ,  G03G21/18 ,  G03G21/1807 ,  G03G21/1814 ,  G03G2221/1657 ,  G03G2221/166

摘要： A developing cartridge includes a case having a first sidewall and a second sidewall opposite to the first sidewall, and a developing roller disposed between the first sidewall and second sidewall. The developing roller can include a developing roller shaft and a developing roller member configured to carry a developing agent thereon, the developing roller member disposed around the developing roller shaft. Also, the developing cartridge can include an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode electrically connected to the developing roller member, and a driven coupling disposed on the second sidewall. The electrode can include, an extending portion extending in a direction away from the first sidewall. An outermost periphery of the driven coupling defines a projection plane projecting in a direction towards the electrode, wherein at least a part of the extending portion is disposed within the projection plane.

摘要翻译： 显影盒包括具有第一侧壁和与第一侧壁相对的第二侧壁的壳体，以及设置在第一侧壁和第二侧壁之间的显影辊。 显影辊可以包括显影辊轴和构造成在其上承载显影剂的显影辊构件，显影辊构件设置在显影辊轴周围。 此外，显影盒可以包括设置在与显影辊轴相邻的第一侧壁上的电极，电连接到显影辊构件的电极和设置在第二侧壁上的从动联接器。 电极可以包括沿远离第一侧壁的方向延伸的延伸部分。 从动联轴器的最外围限定了一个沿朝向电极的方向突出的突出平面，其中延伸部分的至少一部分设置在投影平面内。

公开(公告)号：US20120251144A1

公开(公告)日：2012-10-04

申请号：US13077496

申请日：2011-03-31

申请人： William Yurich Fowlkes ,  Donald Saul Rimai

发明人： William Yurich Fowlkes ,  Donald Saul Rimai

IPC分类号： G03G15/08

CPC分类号： G03G15/0126 ,  G03G15/0194 ,  G03G15/0266 ,  G03G15/065 ,  G03G15/1605

摘要： Methods for printing are provided. In one aspect a primary imaging member having a pattern of engine pixel locations with image modulated differences of potential and with first toner having a first toner difference of potential is moved to a second development station. A second development difference of potential of the first polarity at the second development station forms a second net development difference of the second development difference of potential less any image modulated difference of potential at the individual engine pixel location and less any difference of potential relative to ground of any first toner at the individual engine pixel location. The second development difference of potential is greater than the first development difference of potential so that second toner that is different from the first toner, is developed onto the first toner using the second net development difference of potential.

摘要翻译： 提供打印方法。 在一个方面，具有具有图像调制差异的发动机像素位置的图案和具有第一调色剂潜力差的第一调色剂的主成像构件被移动到第二显影站。 在第二显影站的第一极性的第二发展差异形成了第二显影差异的第二显影差异，减少了在个别发动机像素位置处的任何图像调制的电位差，并且减小了相对于地面的任何潜在电位差 在单个发动机像素位置处的任何第一调色剂。 潜在的第二显影差异大于潜在的第一显影差异，使得与第一调色剂不同的第二调色剂利用第二净显影差的电位显影在第一调色剂上。