公开(公告)号：US5214477A

公开(公告)日：1993-05-25

申请号：US848492

申请日：1992-03-09

申请人： Junichi Hirobe ,  Masakatsu Akashi ,  Masahiko Kobayashi ,  Tsutomu Sugaya

发明人： Junichi Hirobe ,  Masakatsu Akashi ,  Masahiko Kobayashi ,  Tsutomu Sugaya

IPC分类号： G03G15/06 ,  G03G15/08

CPC分类号： G03G15/0812 ,  G03G15/0851

摘要： An image forming apparatus comprises a photoreceptor, a developing roller for forming a layer of developer on a surface thereof to supply toner to the photoreceptor at a developing position, a bias supply for applying bias voltage between the developing roller and a ground, a conductive line for electrically connecting the developer layer with the ground, a detector for detecting toner density of the developer layer based on an amount of electric current flowing through the conductive line, and a voltage controller for preventing surface voltage of the developer layer from falling below a predetermined level despite the electric current flowing into the conductive line at least during a developing operation. Accordingly, there can be reliably prevented formation of fog on a copy because the surface voltage of the developer layer is maintained above the specified level at least during the developing operation.

公开(公告)号：US5206696A

公开(公告)日：1993-04-27

申请号：US848555

申请日：1992-03-09

申请人： Junichi Hirobe ,  Masakatsu Akashi ,  Masahiko Kobayashi ,  Tsutomu Sugaya

发明人： Junichi Hirobe ,  Masakatsu Akashi ,  Masahiko Kobayashi ,  Tsutomu Sugaya

IPC分类号： G03B27/62 ,  G03G15/00

CPC分类号： G03G15/605 ,  G03B27/6235

摘要： An image forming apparatus includes a main body having an image forming device, a document table for holding the document, the table being movable reciprocatingly to the left and right sides of the apparatus when viewed from front over an upper surface of the main body, a drive device for moving the document table, and a movement control device for mechanically executing at least one operation of switching a moving direction of the document table and locking the document table in a predetermined position. Accordingly, there can be obviated the need for providing expensive electronic parts for switching the moving direction of the document table, stopping and locking the document table. Therefore, the image forming apparatus can be manufactured at lower costs.

摘要翻译： 图像形成装置包括具有图像形成装置的主体，用于保持原稿的文件台，当从主体的上表面的前方观察时，该工作台可以往复地移动到装置的左侧和右侧， 用于移动文件台的驱动装置和用于机械地执行切换文件台的移动方向和将文件台锁定在预定位置中的至少一个操作的移动控制装置。 因此，可以避免提供用于切换文件台的移动方向的昂贵的电子部件，停止和锁定文件台的需要。 因此，可以以更低的成本制造图像形成装置。