公开(公告)号：US20110299893A1

公开(公告)日：2011-12-08

申请号：US13150919

申请日：2011-06-01

申请人： Takayuki TAKAI ,  Takuya Okada ,  Takuya Sasaki ,  Hokuto Hatano

发明人： Takayuki TAKAI ,  Takuya Okada ,  Takuya Sasaki ,  Hokuto Hatano

IPC分类号： G03G15/08 ,  G03G13/08

CPC分类号： G03G15/065 ,  G03G15/0806 ,  G03G2215/0648

摘要： A developing device having a plurality of toner carrying members for carrying toner on their outer peripheral surfaces, the plurality of toner carrying members being placed along a rotating direction of an image carrying member and out of contact with the image carrying member; and a developer carrying member for carrying a developer composed of toner and carriers and for supplying the toner to the plurality of toner carrying members. In the developing device, AC bias voltages are applied to the toner carrying members so as to cause the toner carried by the toner carrying members to stick to an electrostatic latent image formed on the image carrying member by the effect of electric fields induced by a voltage of the electrostatic latent image and the AC bias voltages applied to the toner carrying members. The amount of developing toner sticking on the image carrying member immediately after the image carrying member has passed a development area in an upstream side in the rotating direction of the image carrying member is larger than the amount of developing toner sticking on the image carrying member immediately after the image carrying member has passed a development area in a downstream side in the rotating direction of the image carrying member.

摘要翻译： 一种显影装置，具有多个用于在其外周表面上承载调色剂的调色剂承载构件，所述多个调色剂承载构件沿图像承载构件的旋转方向放置并与图像承载构件脱离接触; 以及用于承载由调色剂和载体组成的显影剂并用于将调色剂供给到多个调色剂承载构件的显影剂承载构件。 在显影装置中，将交流偏置电压施加到调色剂承载构件，以便由调色剂承载构件承载的调色剂通过电压感应的电场的影响而粘附在形成在图像承载构件上的静电潜像 的静电潜像和施加到调色剂承载构件的AC偏置电压。 图像承载构件刚刚通过图像承载构件的旋转方向的上游侧的显影区域的图像承载构件上的显影调色剂的量大于立即在图像承载构件上粘着的显影调色剂的量 在图像承载构件已经通过图像承载构件的旋转方向的下游侧的显影区域之后。

公开(公告)号：US20080175625A1

公开(公告)日：2008-07-24

申请号：US12007790

申请日：2008-01-15

申请人： Hiroshi GOTO ,  Chikara TSUTSUI ,  Takayuki TAKAI

发明人： Hiroshi GOTO ,  Chikara TSUTSUI ,  Takayuki TAKAI

IPC分类号： G03G15/00

CPC分类号： G03G15/0808 ,  G03G15/065 ,  G03G2215/0607

摘要： A developing apparatus for visualizing an electrostatic latent image on an electrostatic latent image bearing member by using a developer including toner and carrier particles, has a developer including toner and carrier particles, a first transport member, a second transport member positioned to oppose to the first transport member across a first region and to the electrostatic latent image bearing member across a second region. A first electric field forming unit forms a first electric field between the first and second transport members to move the toner particles from the first transport member to the second transport member. A second electric field forming unit forms a second electric field between the second transport member and the electrostatic latent image bearing member to move the toner particles from the second transport member to the electrostatic latent image bearing member and thereby to visualize an electrostatic latent image on the image into a visible image. The developer further includes charging particles releasably retained on surfaces of the toner particles. Once released from the toner particles and then held on surfaces of the carrier particles, the third particles function to provide an electric charge of the first polarity to the toner particles by the contact therewith.

摘要翻译： 通过使用包含调色剂和载体颗粒的显影剂使静电潜像承载部件上的静电潜像可视化的显影装置具有包括调色剂和载体颗粒的显影剂，第一传送部件和与第一传送部件相对的第二传送部件 运输构件穿过第一区域并且穿过第二区域到静电潜像承载构件。 第一电场形成单元在第一和第二输送构件之间形成第一电场，以将调色剂颗粒从第一输送构件移动到第二输送构件。 第二电场形成单元在第二传送构件和静电潜像承载构件之间形成第二电场，以将调色剂颗粒从第二传送构件移动到静电潜像承载构件，从而使静电潜像可视化 图像变成可见的图像。 显影剂还包括可释放地保留在调色剂颗粒表面上的带电颗粒。 一旦从调色剂颗粒中释放出来，然后将其保持在载体颗粒的表面上，则第三颗粒的作用是通过与调色剂颗粒的接触来提供第一极性的电荷给调色剂颗粒。