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    • 15. 发明授权
    • Electrophotographic image forming apparatus and method
    • 电子照相图像形成装置及方法
    • US5250959A
    • 1993-10-05
    • US698103
    • 1991-05-10
    • Takanobu YamadaKazuyuki Fukui
    • Takanobu YamadaKazuyuki Fukui
    • G03G15/00G03G15/06G03G15/08H04N1/29H04N1/407H04N1/46H04N1/21
    • H04N1/407H04N1/295
    • An electrophotographic image forming apparatus includes a photosensitive member, a charger for charging the photosensitive member with a given initial potential, a laser diode for forming an electrostatic latent image by applying light to the photosensitive member charged with the initial potential, a laser driver for controlling the amount of light to be applied to the photosensitive member from the laser diode in compliance with an image density signal indicative of the density of each pixel of an image to be formed, and at least one developing device accommodating a developer consisting of toner and carrier. The electrostatic latent image formed on the photosensitive member is developed by the developer contained in the developing device. The image forming apparatus further includes a toner density detector for detecting the toner density in the developer, a memory for storing a plurality of gradation correction data, and a CPU for selecting one of the plurality of gradation correction data stored in the memory based upon a toner density detected by the toner density detector. The CPU makes the laser driver control the amount of light based upon gradation correction data selected by the CPU.
    • 电子照相图像形成装置包括感光构件,用于给予初始电位的感光构件充电的充电器,用于通过向充电初始电位的感光构件施加光而形成静电潜像的激光二极管,用于控制的激光驱动器 根据表示要形成的图像的每个像素的密度的图像浓度信号,从激光二极管施加到感光构件的光量以及容纳由调色剂和载体构成的显影剂的至少一个显影装置 。 形成在感光构件上的静电潜像由包含在显影装置中的显影剂显影。 图像形成装置还包括用于检测显影剂中的调色剂浓度的调色剂浓度检测器,用于存储多个灰度校正数据的存储器和用于基于存储器存储在存储器中的多个灰度校正数据之一来选择 调色剂密度检测器检测到的调色剂浓度。 CPU使激光驱动器基于CPU选择的灰度校正数据来控制光量。
    • 18. 发明授权
    • Image formation method and apparatus for forming a plurality of images
in different positions on a recording sheet
    • 用于在记录纸上形成不同位置的多个图像的图像形成方法和装置
    • US5280325A
    • 1994-01-18
    • US616936
    • 1990-11-21
    • Takanobu YamadaKazunobu Maekawa
    • Takanobu YamadaKazunobu Maekawa
    • G03G15/01G03G15/16G03G15/14
    • G03G15/0131G03G15/166G03G2215/0177G03G2215/0193
    • The present invention relates to an image formation method and the apparatus thereof. An electrostatic latent image formed on a photosensitive body is developed with toner, and the developed toner image is electrostatically transferred onto a recording sheet held on a transfer drum; in repeating the process a plurality of images are formed on the recording sheet. The electric charge on the transfer drum is increased by repeating the electrostatic transfer of the toner image, which can cause a trouble; therefore each time an image formation is completed, the charge on the transfer drum is removed. When a part of the recording sheet held on the transfer body on which the toner image is previously formed faces the photosensitive body, the transfer body is controlled to be apart from the photosensitive drum not to disarrange the image which is previously formed on the recording sheet.
    • 本发明涉及一种图像形成方法及其装置。 形成在感光体上的静电潜像用调色剂显影,并将显影的调色剂图像静电转移到保持在转印鼓上的记录纸上; 在重复该处理时,在记录纸上形成多个图像。 通过重复调色剂图像的静电转印来增加转印鼓上的电荷,这可能导致故障; 因此,每次完成图像形成时,转印鼓上的电荷被去除。 当保持在其上预先形成有调色剂图像的转印体上的记录纸的一部分面向感光体​​时,转印体被控制为离开感光鼓,不会使预先形成在记录纸上的图像混淆 。
    • 19. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US4939548A
    • 1990-07-03
    • US329975
    • 1989-03-29
    • Takanobu YamadaNobuyuki Kawai
    • Takanobu YamadaNobuyuki Kawai
    • G03G15/01G03G15/08
    • G03G15/0126G03G15/0896G03G2215/0177G03G2215/018
    • In an image forming apparatus, a support member attachably and detachably supporting a plurality of developing units is provided for moving the developing units upwardly and downwardly or along a common circular orbit by vertical or rotative movement. A vertical movement support member balances with balancers, while a rotary support member has rotative balance by mutual position of each developing unit. A lock member for locking a support member at a desired position and a sensor for detecting the movement of the support member when unlocked are actuated for judging an unbalanced state of the support member by a detecting signal of the sensor.
    • 在图像形成装置中,提供可拆卸地支撑多个显影单元的支撑构件,用于通过垂直或旋转运动沿着共同的圆形轨道向上和向下或者沿着共同的圆形轨道移动显影单元。 垂直运动支撑构件与平衡器平衡,而旋转支撑构件通过每个显影单元的相互位置具有旋转平衡。 用于将支撑构件锁定在期望位置处的锁定构件和用于在解锁时检测支撑构件的移动的传感器被致动,以通过传感器的检测信号判断支撑构件的不平衡状态。
    • 20. 发明授权
    • Image forming apparatus having a plurality of developers and a detection
and control arrangement for detecting the density of a formed image and
a controller for controlling the density of the image
    • 具有多个显影剂的图像形成装置和用于检测形成图像的浓度的检测和控制装置以及用于控制图像的浓度的控制器
    • US4866481A
    • 1989-09-12
    • US88263
    • 1987-08-24
    • Takanobu YamadaKenji Tabuchi
    • Takanobu YamadaKenji Tabuchi
    • G03G15/01G03G15/08
    • G03G15/08G03G15/01
    • An image forming apparatus including a rotatable electrostatic latent image support member, a corona charger, an exposure device, a first developing device confronting the support member and having an effective developing width for developing an electrostatic latent image formed on the support member, a second developing device confronting the support member upstream of the first developing device in a rotational direction of the support member and having an effective developing width for developing, on the support member, not only a first area not to be developed by the first developing device but a second area for forming the electrostatic latent image, a device for forming, in the first area, a reference latent image for detecting a density of the image, a detection device for detecting a density of a reference toner image obtained by developing the reference latent image by the second developing device and a control device for controlling, on the basis of a detection signal from the detection device, the density of the image formed by the second developing device.
    • 一种图像形成装置,包括可旋转的静电潜像支撑构件,电晕充电器,曝光装置,与支撑构件相对的第一显影装置,并且具有用于显影形成在支撑构件上的静电潜像的有效显影宽度,第二显影 该装置在支撑构件的旋转方向上面对第一显影装置上游的支撑构件,并且具有有效的显影宽度,用于在支撑构件上显影不仅由第一显影装置不被显影的第一区域, 用于形成静电潜像的区域,用于在第一区域中形成用于检测图像的浓度的参考潜像的装置,用于检测通过显影参考潜像而获得的参考调色剂图像的浓度的检测装置 第二显影装置和控制装置,用于基于来自第二显影装置的检测信号来控制 e检测装置,由第二显影装置形成的图像的密度。