公开(公告)号：US08977150B2

公开(公告)日：2015-03-10

申请号：US13677873

申请日：2012-11-15

申请人： Shin Yamamoto ,  Shin Murayama ,  Yoshio Sakagawa ,  Yuji Nagatomo

发明人： Shin Yamamoto ,  Shin Murayama ,  Yoshio Sakagawa ,  Yuji Nagatomo

IPC分类号： G03G15/08 ,  G03G15/06 ,  G03G15/22 ,  G03G15/00

CPC分类号： G03G15/08 ,  G03G15/065 ,  G03G15/22 ,  G03G15/50

摘要： An image forming apparatus includes a rotatable photoconductor, a charging unit, an exposure unit to expose the photoconductor to reduce an electrical potential at the photoconductor, a developing unit to charge the toner held on a toner bearing member with friction and attract the toner to the exposed portion on the photoconductor by supplying a development voltage from a first power source and using an electrical potential difference between the toner bearing member and the photoconductor in the development area, a reverse development voltage controller to supply a reverse development voltage while a non-charged portion on the photoconductor passes the development area, and a developer reducing potential applier to supply a development restraining potential and an absolute value smaller than a target charging potential to the photoconductor while the reverse development voltage is supplied.

摘要翻译： 图像形成装置包括可旋转感光体，充电单元，曝光单元以暴露光电导体以减小感光体上的电位;显影单元，用于对保持在调色剂承载构件上的调色剂进行摩擦充电并将调色剂吸引到 通过从第一电源提供显影电压并在显影区域中使用调色剂承载部件和感光体之间的电位差来控制曝光部分，反向显影电压控制器，在不带电的情况下提供反向显影电压 光电导体上的部分通过显影区域，并且显影剂减少潜在的施加器，以在提供反向显影电压的同时向光电导体提供显影抑制电位和小于目标充电电位的绝对值。

公开(公告)号：US07751753B2

公开(公告)日：2010-07-06

申请号：US11954309

申请日：2007-12-12

申请人： Yoshio Sakagawa ,  Tetsumaru Fujita ,  Yuji Nagatomo

发明人： Yoshio Sakagawa ,  Tetsumaru Fujita ,  Yuji Nagatomo

IPC分类号： G03G15/30 ,  G03G15/00

CPC分类号： G03G21/0035 ,  G03G21/0064

摘要： A cleanerless image forming apparatus configured to reduce the density unevenness of halftone images. The apparatus includes a photosensitive member, a charging roller device for uniformly charging the surface of the photosensitive member, an optical writing unit for forming latent images on the surface of the photosensitive member after uniform charging, a developing device for developing the latent toner image on the photosensitive member, a transfer unit for transferring the toner image to an intermediate transfer belt, and a brush member for trapping post-transfer residual toner adhering to the surface of the photosensitive member after passing through the transfer process by the transfer unit and before entering the developing process by the developing device, wherein the post-transfer residual toner is recovered within the developing device after re-transfer of the post-transfer residual toner within the brush member to the surface of the photosensitive member.

摘要翻译： 一种无清洁器的图像形成装置，被配置为减少半色调图像的浓度不均匀性。 该装置包括感光构件，用于均匀地充电感光构件的表面的充电辊装置，用于在均匀充电之后在感光构件的表面上形成潜像的光学书写单元，用于使潜像调色剂图像显影的显影装置 感光构件，用于将调色剂图像转印到中间转印带的转印单元和用于在通过转印单元的转印处理之后并且在进入之前捕获粘附到感光构件的表面上的转印后残留调色剂的刷构件 通过显影装置的显影过程，其中将转印后残留调色剂重新转印到感光构件的表面之前，将转印后残留调色剂回收到显影装置内。

公开(公告)号：US07725054B2

公开(公告)日：2010-05-25

申请号：US11954402

申请日：2007-12-12

申请人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

发明人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

IPC分类号： G03G15/02 ,  G03G21/00

CPC分类号： G03G15/0233 ,  G03G2215/025

摘要： An electrifying apparatus, a processing unit including the electrifying apparatus, and an image formation apparatus including the electrifying apparatus. The electrifying apparatus includes a conductive sheet for electrifying at least one of a surface of a photoconductor and toner adhered to the surface. The conductive sheet is specified to have a pure-water contact angle equal to or greater than 108 degrees, and to have a shore D hardness equal to or less than 65.

摘要翻译： 带电装置，包括通电装置的处理单元和包括通电装置的图像形成装置。 带电装置包括用于使感光体的表面和粘附到表面的调色剂中的至少一个带电的导电片。 导电片被规定为具有等于或大于108度的纯水接触角，并且具有等于或小于65的肖氏D硬度。

公开(公告)号：US07693459B2

公开(公告)日：2010-04-06

申请号：US11855687

申请日：2007-09-14

申请人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

发明人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

IPC分类号： G02G15/02 ,  G03G21/10

CPC分类号： G03G15/0233

摘要： A charging device and an image forming apparatus using the charging device. The charging device includes a charging member to uniformly charge a surface of a latent image bearing member in contact therewith, a charge bias application unit to apply a charge bias to the charging member, a conductive member to contact a surface of the charging member, and a different-valued bias application unit to apply a different-valued bias different from the charge bias to the conductive member. The image forming apparatus includes a latent image bearing member to bear a latent image, a latent image forming unit to form the latent image on the latent image bearing member, a development unit to develop the latent image with toner, and the charging device.

摘要翻译： 一种充电装置和使用该充电装置的图像形成装置。 充电装置包括：充电部件，用于使与其接触的潜像承载部件的表面均匀充电;充电偏压施加单元，用于向充电部件施加充电偏压;导电部件，用于接触充电部件的表面;以及 不同值的偏置施加单元，用于将不同于充电偏压的不同值的偏压施加到导电构件。 图像形成装置包括：潜像承载部件，用于承载潜像;潜像形成单元，用于在潜像承载部件上形成潜像;显影单元，用调色剂显影潜象;以及充电装置。

公开(公告)号：US07903993B2

公开(公告)日：2011-03-08

申请号：US11972154

申请日：2008-01-10

申请人： Yoshio Sakagawa ,  Tetsumaru Fujita ,  Yuji Nagatomo

发明人： Yoshio Sakagawa ,  Tetsumaru Fujita ,  Yuji Nagatomo

IPC分类号： G03G15/00

CPC分类号： G03G15/0225

摘要： An image forming apparatus capable of maintaining cleaning performance of a cleaning brush and downsizing the apparatus main body. Transfer residual toner accumulated on the cleaning brush is transferred onto a photoreceptor by an electrostatic force, hence the cleaning brush becomes clean and the cleaning performance thereof improves. Therefore, the photoreceptor and a charging roller can be cleaned well by the cleaning brush over a long period of time, and the photoreceptor can be charged well by the charging roller over a long period of time. Moreover, because the transfer residual toner that is transferred from the cleaning brush onto the photoreceptor is recovered by a developing device, it is not necessary to provide the apparatus main body with a toner recovery portion that is specially designed for recovering the transfer residual toner, hence the apparatus main body can be downsized.

摘要翻译： 一种能够保持清洁刷的清洁性能并且使装置主体小型化的图像形成装置。 转印在清洁刷上的转印残留调色剂通过静电力转印到感光体上，清洁刷变清洁，清洗性能提高。 因此，可以通过清洁刷长时间清洁感光体和充电辊，并且可以通过充电辊在长时间内充分地对感光体充电。 此外，由于通过显影装置回收从清洁刷转印到感光体上的转印残余调色剂，所以不必为设备主体提供专门设计用于回收转印残留调色剂的调色剂回收部分， 因此能够使装置主体小型化。

公开(公告)号：US07796912B2

公开(公告)日：2010-09-14

申请号：US12023544

申请日：2008-01-31

申请人： Yoshio Sakagawa ,  Tetsumaru Fujita ,  Yuji Nagatomo

发明人： Yoshio Sakagawa ,  Tetsumaru Fujita ,  Yuji Nagatomo

IPC分类号： G03G15/02

CPC分类号： G03G15/0258 ,  G03G2215/021

摘要： An image forming apparatus includes: an image carrying member having a movable surface; a charging device including a rotatable charging member which is supplied with a voltage including a direct voltage superimposed with an alternating voltage, and which contacts and charges the image carrying member; an electrostatic latent image forming device for forming an electrostatic latent image on the image carrying member; and a development device for developing the electrostatic latent image. The frequency of the alternating voltage is lower in a non-image forming area than in an image forming area. In the non-image forming area, the image carrying member is charged to a surface potential having a waveform shape in accordance with the alternating voltage, and the potential difference between the surface potential and the voltage applied to the charging member generates an electric field which moves toner adhering to the charging member to the image carrying member.

摘要翻译： 图像形成装置包括：具有可移动表面的图像承载构件; 充电装置，包括：可旋转充电部件，其被提供有包括叠加有交流电压的直流电压的电压，并且对图像承载部件进行接触和充电; 用于在图像承载部件上形成静电潜像的静电潜像形成装置; 以及用于显影静电潜像的显影装置。 非图像形成区域中的交流电压的频率低于图像形成区域。 在非图像形成区域中，将图像承载部件充电到具有与交流电压相对应的波形形状的表面电位，并且表面电位与施加到充电部件的电压之间的电位差产生电场， 将附着在充电构件上的调色剂移动到图像承载构件。

公开(公告)号：US07684732B2

公开(公告)日：2010-03-23

申请号：US11956901

申请日：2007-12-14

申请人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

发明人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

IPC分类号： G03G21/00

CPC分类号： G03G15/0233 ,  G03G2215/025

摘要： An image forming apparatus includes at least a latent image carrier, a latent image forming mechanism, a developing mechanism and a charger. The latent image carrier bears a latent image. The latent image forming mechanism forms the latent image on the latent image carrier. The developing mechanism develops the latent image on the latent image carrier with toner. The charger includes a conductive member supplied with a bias voltage while contacting a surface of the latent image carrier, and charges at least one of the surface of the latent image carrier and a toner adhering to the surface thereof through the conductive member. A tensile strength of the conductive member at break is no less than 10 MPa and no more than 40 MPa, and a contact pressure between the conductive member and the latent image carrier is no less than 4 kN/m2 and no more than 15 kN/m2.

摘要翻译： 图像形成装置至少包括潜像载体，潜像形成机构，显影机构和充电器。 潜像载体承载潜像。 潜像形成机构在潜像载体上形成潜像。 显影机构利用调色剂在潜像载体上形成潜像。 充电器包括在与潜像载体的表面接触的同时提供偏压的导电构件，并且通过导电构件对潜像载体的表面中的至少一个和附着于其表面的调色剂进行充电。 导电部件断裂时的拉伸强度为10MPa以上且40MPa以下，导电部件与潜像载体的接触压力为4kN / m 2以上且15kN / m 2以下， m2。

公开(公告)号：US20080069592A1

公开(公告)日：2008-03-20

申请号：US11855687

申请日：2007-09-14

申请人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

发明人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

IPC分类号： G03G15/02

CPC分类号： G03G15/0233

摘要： A charging device and an image forming apparatus using the charging device. The charging device includes a charging member to uniformly charge a surface of a latent image bearing member in contact therewith, a charge bias application unit to apply a charge bias to the charging member, a conductive member to contact a surface of the charging member, and a different-valued bias application unit to apply a different-valued bias different from the charge bias to the conductive member. The image forming apparatus includes a latent image bearing member to bear a latent image, a latent image forming unit to form the latent image on the latent image bearing member, a development unit to develop the latent image with toner, and the charging device.

摘要翻译： 一种充电装置和使用该充电装置的图像形成装置。 充电装置包括：充电部件，用于使与其接触的潜像承载部件的表面均匀充电;充电偏压施加单元，用于向充电部件施加充电偏压;导电部件，用于接触充电部件的表面;以及 不同值的偏置施加单元，用于将不同于充电偏压的不同值的偏压施加到导电构件。 图像形成装置包括：潜像承载部件，用于承载潜像;潜像形成单元，用于在潜像承载部件上形成潜像;显影单元，用调色剂显影潜象;以及充电装置。

公开(公告)号：US07738803B2

公开(公告)日：2010-06-15

申请号：US11849686

申请日：2007-09-04

申请人： Tetsumaru Fujita ,  Yuji Nagatomo ,  Yoshio Sakagawa

发明人： Tetsumaru Fujita ,  Yuji Nagatomo ,  Yoshio Sakagawa

IPC分类号： G03G15/02

CPC分类号： G03G15/0216 ,  G03G2215/00075 ,  G03G2215/021

摘要： An image forming apparatus, performing a corresponding method of image forming, includes an image carrier, a writing unit, a developing unit, a charging member configured to rotate continuously with the image carrier at a portion contacting the image carrier and uniformly charge a surface of the image carrier while contacting a surface thereof with the surface of the image carrier, a charge bias applying unit configured to apply a charge bias to the charging member, and a controller configured to control of driving of the image carrier and the charging member and reduce at a charge nip at a given timing a linear velocity ratio of a travel speed of the surface of the charging member to a travel speed of the surface of the image carrier.

摘要翻译： 执行相应的图像形成方法的图像形成装置包括图像载体，书写单元，显影单元，充电构件，其构造成与图像载体在与图像载体接触的部分处连续旋转， 所述图像载体在与所述图像载体的表面接触的同时，所述充电偏压施加单元被配置为向所述充电构件施加充电偏压;以及控制器，被配置为控制所述图像载体和所述充电构件的驱动，并且减小 在给定时间的充电压区，充电构件的表面的行进速度与图像载体的表面的行进速度的线速度比。

公开(公告)号：US07664433B2

公开(公告)日：2010-02-16

申请号：US12021630

申请日：2008-01-29

申请人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

发明人： Tetsumaru Fujita ,  Yoshio Sakagawa ,  Yuji Nagatomo

IPC分类号： G03G15/02

CPC分类号： G03G15/0225

摘要： An image forming apparatus includes a charging device for charging a photosensitive element having a moving surface, by bringing a charging roller, to which voltage is applied, into pressure-contact with the photosensitive element, wherein to the charging member there is applied voltage for forming an electric field such that toner adhered to the charging roller surface at a non-image forming area is oriented towards the photosensitive element. The image forming apparatus is provided with pressure contact force modifying means for making the pressure contact force of the charging roller against the photosensitive element at the non-image forming area greater than that at an image forming area.

摘要翻译： 图像形成装置包括：充电装置，用于对具有移动表面的感光元件进行充电，通过使施加了电压的充电辊与感光元件压力接触，其中对充电构件施加施加电压以形成 使得在非图像形成区域附着到充电辊表面的调色剂朝向感光元件取向的电场。 图像形成装置设置有压力接触力修改装置，用于使得充电辊抵靠非图像形成区域处的感光元件的压力接触力大于图像形成区域处的压力接触力。