公开(公告)号：US20120003014A1

公开(公告)日：2012-01-05

申请号：US13173928

申请日：2011-06-30

申请人： Kanji NAKAYAMA ,  Masayasu Haga ,  Tomohisa Yoshida ,  Wataru Onoda ,  Yoshiyuki Iguchi ,  Noboru Ito

发明人： Kanji NAKAYAMA ,  Masayasu Haga ,  Tomohisa Yoshida ,  Wataru Onoda ,  Yoshiyuki Iguchi ,  Noboru Ito

IPC分类号： G03G15/09

CPC分类号： G03G15/081 ,  G03G15/0812 ,  G03G15/09

摘要： A two-component developing device using a developer containing toner and magnetic carrier particles. The developing device comprises a housing, a developing roller, a magnetic field generator mounted inside the developing roller, and a developer restricting member, and further comprises a developer guide member providing a developer guide path for guiding the developer to the developer amount restricting clearance, providing a developer circulation path for circulating the developer to an upstream end of the guide member, and providing a communication path for bringing the developer guide path into communication with the developer circulation path, an upstream end of the guide member being positioned above the position of a peak of magnetic flux density of the magnetic pole of the magnetic field generator which is closest to a low-magnetic force area downstream of the low-magnetic force area or positioned upstream of such a position and downstream of the low-magnetic force area. An image forming device in which such a two-component developing device is employed as at least one developing device.

摘要翻译： 一种使用含有调色剂和磁性载体颗粒的显影剂的双组分显影装置。 显影装置包括壳体，显影辊，安装在显影辊内部的磁场发生器和显影剂限制构件，并且还包括显影剂引导构件，显影剂引导构件提供用于将显影剂引导至显影剂量限制间隙的显影剂引导路径， 提供用于使显影剂循环到引导构件的上游端的显影剂循环路径，并且提供用于使显影剂引导路径与显影剂循环路径连通的连通路径，引导构件的上游端位于 磁场发生器的磁极的磁通密度的峰值最靠近低磁力区域下游的低磁力区域或者位于低磁力区域的这个位置的下游。 使用这种双组分显影装置作为至少一个显影装置的图像形成装置。

公开(公告)号：US20120177416A1

公开(公告)日：2012-07-12

申请号：US13344022

申请日：2012-01-05

申请人： Kanji NAKAYAMA ,  Masayasu Haga ,  Tomohisa Yoshida ,  Wataru Onoda ,  Narutaka Yoshida ,  Noboru Ito

发明人： Kanji NAKAYAMA ,  Masayasu Haga ,  Tomohisa Yoshida ,  Wataru Onoda ,  Narutaka Yoshida ,  Noboru Ito

IPC分类号： G03G15/08

CPC分类号： G03G15/0907 ,  G03G15/0928

摘要： An image forming apparatus, wherein the packing density at a closest point where the first peripheral surface and the second peripheral surface are the closest to each other is within a range from 0.3 to 0.4; wherein a maximum magnetic flux density of a principal magnetic pole for generating the magnetic field for development is located in an upstream side from the closest point with respect to the specified direction and at a point where the packing density is equal to or greater than 0.2; and wherein a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in a downstream side from the closest point with respect to the specified direction is equal to or less than ½ of a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in the upstream side.

摘要翻译： 一种图像形成装置，其中，所述第一周面和所述第二周面最接近的最靠近处的填充密度在0.3〜0.4的范围内; 其中用于产生用于显影的磁场的主磁极的最大磁通密度位于相对于指定方向的最近点的上游侧，并且在填充密度等于或大于0.2的点处; 并且其中，相对于规定方向从最近点起的下游侧的填充密度为0.2的点处的主磁极的磁通密度等于或小于主磁体的磁通密度的1/2 在上游侧的填充密度为0.2的点处。

公开(公告)号：US20090310995A1

公开(公告)日：2009-12-17

申请号：US12478055

申请日：2009-06-04

申请人： Kanji NAKAYAMA ,  Noritoshi HAGIMOTO ,  Yuusuke OKUNO ,  Tomo KITADA ,  Toshiya AOKI

发明人： Kanji NAKAYAMA ,  Noritoshi HAGIMOTO ,  Yuusuke OKUNO ,  Tomo KITADA ,  Toshiya AOKI

IPC分类号： G03G15/06

CPC分类号： G03G15/065 ,  G03G15/0849 ,  G03G15/0862 ,  G03G15/0877 ,  G03G15/0879

摘要： In case new and old toners may be mixed, a developing bias is set as follows. The time is first clocked. The number of times toner is replenished from a hopper into a buffer for a clocked period is counted. If a replenishment amount per clock time is a threshold value or higher, considering that new and old toners are mixed, the setting of the developing bias is changed. An electric field intensity between a developing roller and a photoconductor is set to cause normally-charged toner to fly in an image area but not to fly in a background area. No image fogging is therefore generated in the background area. Thus, an image forming apparatus and method capable of preventing low-charged toner and oppositely-charged toner generated by mixing of new and old toners from adhering to the background area of an electrostatic latent image on the photoconductor, thereby avoiding generation of image fogging.

摘要翻译： 如果新旧的调色剂可能混合，则显影偏压设置如下。 时间是第一时间。 计数将调色剂从料斗补充到缓冲器中的次数。 如果每个时钟时间的补充量是阈值或更高，则考虑到新的和旧的调色剂混合，改变了显影偏差的设定。 设置显影辊和光电导体之间的电场强度以使正常充电的调色剂在图像区域中飞行，但不在背景区域中飞行。 因此，在背景区域中不会产生图像雾化。 因此，能够防止由新旧的调色剂混合而产生的带电荷低的调色剂和相反电荷的调色剂粘附在感光体上的静电潜像的背景区域，从而避免图像起雾的形成装置和方法。