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公开(公告)号：US5479239A
公开(公告)日：1995-12-26
申请号：US432532
申请日：1995-05-01
CPC分类号： G03G21/1828 , G03G15/169 , G03G21/1628 , G03G21/168 , G03G2221/1642 , G03G2221/1687 , G03G2221/183
摘要： For a pre-transfer charging device provided in image processing apparatus for a xerographic image reproducing machine, a bipartite shield is provided, having a shield upper case mounted in an imaging apparatus first frame, and a shield lower case mounted in an imaging apparatus second frame fitted with a guide at least partially defining a sheet conveyance path into an imaging unit of the imaging apparatus. The imaging unit includes a chargeable photoconductor drum and is mounted in the first frame, which is pivotally joined to the second frame. A bottom exterior surface of the shield lower case serves as a guide partially defining a terminal portion of the sheet conveyance path. A discharge wire is fitted in the shield upper case, extending axially within the pre-transfer charging device, and therein is movable integrally with the shield upper case. During maintenance on the imaging apparatus, the first frame is opened off of the second frame. The discharge wire as the frames are separated moves integrally with the shield upper case and is thus exposed for ease of cleaning and other maintenance. The bipartite shield construction accordingly ensures that the accuracy of the relative positions of the parts forming the terminal portion of the sheet conveyance path is not disturbed when the frames are separated for maintenance access.
摘要翻译： 对于在静电复印机图像处理装置中提供的预转印充电装置，提供了一种二分屏蔽，其具有安装在成像装置第一框架中的屏蔽上壳体，以及安装在成像装置第二框架中的屏蔽下壳体 装配有至少部分地限定成像装置的成像单元的片材输送路径的引导件。 成像单元包括可充电的感光鼓并且安装在第一框架中，该第一框架枢转地连接到第二框架。 屏蔽下壳体的底部外表面用作部分地限定片材输送路径的端子部分的引导件。 放电线安装在屏蔽上壳体中，在预转印充电装置内轴向延伸，并且其中可与屏蔽上壳体整体移动。 在成像装置的维护期间，第一框架从第二框架打开。 作为框架的放电线与屏蔽上壳体一体地分离，因此露出以便于清洁和其它维护。 因此，二分屏蔽结构确保当框架被分离用于维护通路时，形成片材输送路径的端子部分的部件的相对位置的精度不会受到干扰。
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2.发明授权Image forming apparatus having controller adjusting current to main charger and transfer charger 失效图像形成装置具有控制器调节主充电器和转印充电器的电流
公开(公告)号：US5552861A
公开(公告)日：1996-09-03
申请号：US352865
申请日：1994-12-02
CPC分类号： G03G15/0283 , G03G15/1645
摘要： An image forming apparatus is provided with a high voltage transformer provided with one common secondary winding for supplying a high voltage power to a main charger and to a transferring charger, a resistor for sensing a shield current of the transferring charger, an error detecting amplifier for controlling a primary side of the high voltage transformer so that the sensed shield current is constant; a constant voltage device connected to a grid of the main charger for constant-voltage controlling the main charger, and a resistor inserted in a current path to the transferring charger for setting a current supplied from the high voltage transformer to the main charger to be greater than a current supplied from the high voltage transformer to the transferring charger.
摘要翻译： 图像形成装置设置有设置有用于向主充电器和转印充电器提供高压电力的一个公共次级绕组的高压变压器，用于感测转印充电器的屏蔽电流的电阻器，用于 控制高压变压器的初级侧，使感测到的屏蔽电流恒定; 连接到主充电器的电网的恒压装置，用于对主充电器进行恒压控制，以及插入到转移充电器的电流路径中的电阻器，用于将从高压变压器提供的电流设置为主充电器以更大 而不是从高压变压器提供给转印充电器的电流。
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公开(公告)号：US5499081A
公开(公告)日：1996-03-12
申请号：US294524
申请日：1994-08-23
IPC分类号： G03G15/00 , G03G21/08 , G03G21/14 , G03G21/00 , G03G15/045
CPC分类号： G03G15/5008 , G03G15/50
摘要： An image forming apparatus includes a photosensitive drum driver for rotating a photosensitive drum at either a normal speed or a higher speed, a charger, a charge remover for removing residual charges on the photosensitive drum surface after a toner image is transferred, a starter for instructing a start of image forming operation, and a controller responsive to the starter for controlling the operative parts. Upon the starter being turned on, the controller drives the charger and the charge remover, and permits the photosensitive drum driver to rotate the photosensitive drum at the higher speed, and suspends the image formation, After the photosensitive drum completes the initial one turn, the controller starts the image formation and permits the photosensitive drum driver to rotate the photosensitive drum at the normal speed.
摘要翻译： 图像形成装置包括用于以正常速度或更高速度旋转感光鼓的感光鼓驱动器，充电器，用于在转印调色剂图像之后去除感光鼓表面上的残余电荷的电荷去除器，用于指示的启动器 图像形成操作的开始，以及响应于起动器的用于控制操作部分的控制器。 当启动器开启时，控制器驱动充电器和充电去除器，并允许感光鼓驱动器以更高的速度旋转感光鼓，并且悬挂图像形成。在感光鼓完成初始的一圈之后， 控制器开始图像形成，并允许感光鼓驱动器以正常速度旋转感光鼓。
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公开(公告)号：US5481345A
公开(公告)日：1996-01-02
申请号：US283447
申请日：1994-08-01
CPC分类号： G03G15/169 , G03G15/165 , G03G2215/00409
摘要： An image forming apparatus includes a photosensitive drum rotatable, a developer disposed near the photosensitive drum for developing an electrostatic latent image into a toner image, a transfer disposed on a downstream of the developer for transferring the toner image onto copy paper, and a pre-transfer charger disposed between the developer and the transfer for charging the photosensitive drum at a specified level to assure a smooth transfer of the toner image from the photosensitive drum to the copy paper, the charger including a casing formed with a guide portion for guiding the copy paper to the transfer.
摘要翻译： 图像形成装置包括可旋转的感光鼓，设置在感光鼓附近的用于将静电潜像显影成调色剂图像的显影剂，设置在显影剂下游的转印体，用于将调色剂图像转印到复印纸上， 转印充电器，其设置在显影剂和转印件之间，用于以特定水平对感光鼓充电，以确保调色剂图像从感光鼓到复印纸的平稳转印，充电器包括形成有引导部分的壳体， 纸转移。
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公开(公告)号：US5530525A
公开(公告)日：1996-06-25
申请号：US353109
申请日：1994-12-09
申请人： Mitsuji Tsujita , Masahiko Maeda , Kazuhiro Mizude , Tomohiro Tsutano , Masao Uyama , Nariaki Tanaka , Takashi Terada , Takuji Terada
发明人： Mitsuji Tsujita , Masahiko Maeda , Kazuhiro Mizude , Tomohiro Tsutano , Masao Uyama , Nariaki Tanaka , Takashi Terada , Takuji Terada
CPC分类号： G03G21/08 , G03G5/0681
摘要： An image forming apparatus includes a charge removing device for removing the residual charge on a photosensitive film. The light emitted from an optical source of the charge removing device is selected from the range between the wavelengths which correspond to half of the maximum absorbance in a light absorbance characteristic of the photosensitive film. Since carrier generation does not occur by the light emitted by the charge removing device, the charging ability and the charge retaining ability of the photosensitive film are improved, and the image quality is significantly improved.
摘要翻译： 图像形成装置包括用于去除感光膜上的残留电荷的电荷去除装置。 从电荷去除装置的光源发射的光从在感光膜的吸光度特性中与最大吸光度的一半相对应的波长之间的范围内选择。 由于由电荷去除装置发出的光不会发生载流子的产生，所以提高了感光膜的充电能力和电荷保持能力，显着提高了图像质量。
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