公开(公告)号：US08032043B2

公开(公告)日：2011-10-04

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。

公开(公告)号：US08406645B2

公开(公告)日：2013-03-26

申请号：US12473541

申请日：2009-05-28

申请人： Yuusuke Okuno ,  Kentaro Katori ,  Kanji Nakayama ,  Tomo Kitada ,  Toru Hayase

发明人： Yuusuke Okuno ,  Kentaro Katori ,  Kanji Nakayama ,  Tomo Kitada ,  Toru Hayase

IPC分类号： G03G15/06

CPC分类号： G03G15/0813 ,  G03G15/065 ,  G03G2215/0634

摘要： Developing bias is set as follows. An electric field intensity between a developing roller and a photoconductor is set to cause normally-charged toner to fly in an image area and not to cause the toner to fly in a background area. Thus, the normally-charged toner does not fly in the background area. The normally-charged toner caused to fly is therefore unlikely to flick low-charged toner and oppositely-charged toner. The low-charged toner and the oppositely-charged toner will not adhere to the background area and cause image fogging. Accordingly, an image forming apparatus can be provided to prevent the low-charged toner and the oppositely-charged toner from adhering to the background area of an electrostatic latent image on the photoconductor and to avoid the occurrence of image fogging in the background area on a printed material.

摘要翻译： 开发偏差设置如下。 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，并且不会使调色剂在背景区域中飞行。 因此，正常充电的调色剂在背景区域不飞。 因此，因飞扬的正常充电的调色剂不太可能会使低充电的调色剂和带有相反电荷的调色剂翻转。 低电量调色剂和带相反电荷的调色剂不会粘附到背景区域并导致图像起雾。 因此，可以提供图像形成装置，以防止低电荷调色剂和相反电荷的调色剂粘附到感光体上的静电潜像的背景区域上，并且避免在背景区域上发生图像起雾 印刷材料。

公开(公告)号：US20090304404A1

公开(公告)日：2009-12-10

申请号：US12473541

申请日：2009-05-28

申请人： Yuusuke OKUNO ,  Kentaro Katori ,  Kanji Nakayama ,  Tomo Kitada ,  Toru Hayase

发明人： Yuusuke OKUNO ,  Kentaro Katori ,  Kanji Nakayama ,  Tomo Kitada ,  Toru Hayase

IPC分类号： G03G15/08 ,  G03G15/00

CPC分类号： G03G15/0813 ,  G03G15/065 ,  G03G2215/0634

摘要： Developing bias is set as follows. An electric field intensity between a developing roller and a photoconductor is set to cause normally-charged toner to fly in an image area and not to cause the toner to fly in a background area. Thus, the normally-charged toner does not fly in the background area. The normally-charged toner caused to fly is therefore unlikely to flick low-charged toner and oppositely-charged toner. The low-charged toner and the oppositely-charged toner will not adhere to the background area and cause image fogging. Accordingly, an image forming apparatus can be provided to prevent the low-charged toner and the oppositely-charged toner from adhering to the background area of an electrostatic latent image on the photoconductor and to avoid the occurrence of image fogging in the background area on a printed material.

摘要翻译： 开发偏差设置如下。 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，并且不会使调色剂在背景区域中飞行。 因此，正常充电的调色剂不会在背景区域中飞行。 因此，因飞扬的正常充电的调色剂不太可能会使低充电的调色剂和带有相反电荷的调色剂翻转。 低电量调色剂和带相反电荷的调色剂不会粘附到背景区域并导致图像起雾。 因此，可以提供图像形成装置，以防止低电荷调色剂和相对充电的调色剂粘附到感光体上的静电潜像的背景区域上，并且避免在背景区域上发生图像起雾 印刷材料。

公开(公告)号：US08639167B2

公开(公告)日：2014-01-28

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： G03G15/095 ,  G03G15/08

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：US08693929B2

公开(公告)日：2014-04-08

申请号：US13343157

申请日：2012-01-04

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

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

IPC分类号： G03G15/08

CPC分类号： G03G15/0813 ,  G03G15/0896

摘要： An image forming apparatus for forming a toner image on a print medium with a developer composed of toner and carriers, wherein when the first distance is longer than the second distance, an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending upstream from the closest point with respect to the specified direction is smaller than an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending downstream from the closest point with respect to the specified direction.

摘要翻译： 一种图像形成装置，用于在具有由调色剂和载体构成的显影剂的打印介质上形成调色剂图像，其中当所述第一距离长于所述第二距离时，所述第一外围表面和面向所述第一距离的构件之间的平均间隙 在相对于指定方向从最近点延伸上游的第一距离的长度的区域中的周边表面小于在第一周边表面和面向第一周边表面的部件之间的平均间隙 从相对于指定方向的最近点延伸下游的第一距离的长度。

公开(公告)号：US20120177415A1

公开(公告)日：2012-07-12

申请号：US13343157

申请日：2012-01-04

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

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

IPC分类号： G03G15/08

CPC分类号： G03G15/0813 ,  G03G15/0896

摘要： An image forming apparatus for forming a toner image on a print medium with a developer composed of toner and carriers, wherein when the first distance is longer than the second distance, an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending upstream from the closest point with respect to the specified direction is smaller than an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending downstream from the closest point with respect to the specified direction.

摘要翻译： 一种图像形成装置，用于在具有由调色剂和载体构成的显影剂的打印介质上形成调色剂图像，其中当所述第一距离长于所述第二距离时，所述第一周边表面和面向所述第一距离的构件之间的平均间隙 在相对于指定方向从最近点延伸上游的第一距离的长度的区域中的周边表面小于在第一周边表面和面向第一周边表面的部件之间的平均间隙 从相对于指定方向的最近点延伸下游的第一距离的长度。

公开(公告)号：US08824938B2

公开(公告)日：2014-09-02

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 ,  G03G15/09

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。