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    • 1. 发明授权
    • Image forming apparatus and method for obtaining appropriate toner
density
    • 用于获得适当调色剂密度的图像形成装置和方法
    • US06055388A
    • 2000-04-25
    • US54510
    • 1998-04-03
    • Shigeru WatanabeMasaru TanakaHaruji MizuishiKenzou TatsumiToshitaka YamaguchiTakeo SudaHiroshi YoshinagaKen AmemiyaMayumi Oh-Hori
    • Shigeru WatanabeMasaru TanakaHaruji MizuishiKenzou TatsumiToshitaka YamaguchiTakeo SudaHiroshi YoshinagaKen AmemiyaMayumi Oh-Hori
    • G03G15/08G03G15/10
    • G03G15/0849G03G15/0853G03G15/0891
    • An image forming apparatus includes an image bearing member, a latent image forming device that forms a latent image on the image bearing member, a developing device that develops latent image on said image bearing member to a toner image with a two-component developer, and a toner density detecting device that detects toner density of the two-component developer in which the toner image is formed and outputted as a visible image onto a transfer member. A control device is provided for agitating the developer for a predetermined time period during an initial setting is performed for the developer, detecting a toner density of said developer after the predetermined agitation, and performing an abnormal process when a result of the detection is out of the predetermined range. A corresponding method recovers from a deterioration of an amount of charge of the toner and decreased bulk of the developer, and includes the steps of detecting a developer amount with an unused-state detection switch, detecting an output value of a toner density detecting sensor, agitating the developer, measuring an agitating time period, stopping the agitating operation indicating warning, and indicating error message.
    • 图像形成装置包括图像承载部件,在图像承载部件上形成潜像的潜像形成装置,利用双组分显影剂将所述图像承载部件上的潜像显影成调色剂图像的显影装置,以及 调色剂浓度检测装置,其检测其中调色剂图像形成并作为可见图像输出到转印部件上的双组分显影剂的调色剂浓度。 提供了一种控制装置,用于在对显影剂进行初始设定期间的预定时间段内搅拌显影剂,在预定搅拌之后检测所述显影剂的调色剂浓度,并且当检测结果不合格时执行异常处理 预定范围。 相应的方法从调色剂的电荷量的劣化和显影剂的体积减少而恢复,并且包括以下步骤:用未使用状态的检测开关检测显影剂量,检测调色剂浓度检测传感器的输出值, 搅拌显影剂,测量搅拌时间,停止搅拌操作指示警告,并指示错误信息。
    • 2. 发明授权
    • Image forming method and apparatus for controlling amount of supplied
toner or agitating time
    • 用于控制供应调色剂量或搅拌时间的图像形成方法和装置
    • US6006050A
    • 1999-12-21
    • US961515
    • 1997-10-30
    • Shigeru WatanabeMasaru TanakaHaruji MizuishiToshitaka YamaguchiKenzou TatsumiHiroshi YoshinagaTakeo SudaKen AmemiyaMayumi Oh-Hori
    • Shigeru WatanabeMasaru TanakaHaruji MizuishiToshitaka YamaguchiKenzou TatsumiHiroshi YoshinagaTakeo SudaKen AmemiyaMayumi Oh-Hori
    • G03G21/14G03G15/08
    • G03G15/0822
    • An image forming apparatus including an image bearing member, a latent image forming device which forms a latent image on the image bearing member, a developing device which develops the latent image using a two-component developer including a toner and a carrier and a toner supplying device which supplies toner into the developing device. A developer agitating device agitates developer in the developing device and a toner-density detecting device detects a toner density of developer in the developing device. A toner-density control device controls the toner density by operating the toner supplying device on the basis of a detected result according to the toner-density detecting device. A memory device stores resultant value of the toner density detected by the toner-density detecting device during image forming operations. The toner-density detecting device detects the toner density in a warm-up operation before starting the image forming operation by the image forming apparatus. The toner-density control device changes an amount of the toner supply which is supplied by the toner supplying device after starting the image forming operation according to a result of a comparison of the detected toner density in the warm-up operation with the detected result stored in the memory device. The toner-density control device changes an amount of the toner supply which is supplied by the toner supplying device after starting the image forming operation according to the resultant value of comparison of a result of a detection.
    • 一种图像形成装置,包括图像承载部件,在图像承载部件上形成潜像的潜像形成装置,使用包括调色剂和载体的双组分显影剂和调色剂供给来显影潜像的显影装置 将调色剂供给到显影装置中的装置。 显影剂搅拌装置搅拌显影装置中的显影剂,调色剂浓度检测装置检测显影装置中的显影剂的调色剂浓度。 调色剂浓度控制装置基于根据调色剂浓度检测装置的检测结果操作调色剂供应装置来控制调色剂浓度。 存储装置在图像形成操作期间存储由调色剂浓度检测装置检测的调色剂浓度的结果值。 调色剂浓度检测装置在图像形成装置开始图像形成操作之前检测预热操作中的调色剂浓度。 调色剂浓度控制装置根据检测到的预热操作中的调色剂浓度与检测结果的比较结果,改变在开始成像操作之后由调色剂供应装置供应的调色剂供应量 在存储设备中。 调色剂浓度控制装置根据检测结果的比较的结果值,改变在开始图像形成操作之后由调色剂供应装置供应的调色剂供应量。
    • 8. 发明授权
    • Image forming apparatus with improved toner density control
    • 具有改进的调色剂浓度控制的图像形成装置
    • US6148161A
    • 2000-11-14
    • US414857
    • 1999-10-12
    • Noriyuki UsuiKen AmemiyaHaruji MizuishiMayumi OhoriMasaru TanakaKenzo TatsumiToshitaka YamaguchiHideki ZembaHiroshi Mizusawa
    • Noriyuki UsuiKen AmemiyaHaruji MizuishiMayumi OhoriMasaru TanakaKenzo TatsumiToshitaka YamaguchiHideki ZembaHiroshi Mizusawa
    • G03G15/08G03G15/10
    • G03G15/0822G03G15/0849G03G15/0853G03G15/5041G03G2215/00042
    • An image forming apparatus includes an image carrier and a developing device to develop a latent image formed on the image carrier by applying two-component developer, including toner, onto the latent image. The developing device includes a developing part containing the two-component developer and a developer stirring device to stir the two-component developer. A toner supplying device supplies toner to the developing part of the developing device, and a toner density detection device detects a toner density of the two-component developer in the developing device. A toner control device calculates a difference between an output value VT of the toner density detection device and a criterion value VTref for controlling the toner density of the two-component developer and controls the toner supplying device based upon the difference. An image density detection device detects an image density of a criterion image formed on the image carrier, and a criterion value correcting device corrects the criterion value VTref based upon an output value of the criterion image density detection device. A decision as to whether to stir the developer in the developing device with the developer stirring device is made based upon a difference between the criterion value VTref and the output value VT from the toner density detection device and an output value of the criterion image density detection device when an image forming operation is started.
    • 图像形成装置包括图像载体和显影装置,以通过将包括调色剂的双组分显影剂施加到潜像上来显影形成在图像载体上的潜像。 显影装置包括含有双组分显影剂的显影部分和用于搅拌双组分显影剂的显影剂搅拌装置。 调色剂供应装置向显影装置的显影部分供应调色剂,并且调色剂浓度检测装置检测显影装置中的双组分显影剂的调色剂浓度。 调色剂控制装置计算调色剂浓度检测装置的输出值VT与用于控制双组分显影剂的调色剂浓度的标准值VTref之间的差异,并基于该差异来控制调色剂供给装置。 图像浓度检测装置检测形成在图像载体上的标准图像的图像浓度,并且基准值校正装置基于标准图像浓度检测装置的输出值来校正标准值VTref。 基于标准值VTref和来自调色剂浓度检测装置的输出值VT与标准图像浓度检测的输出值之间的差异,决定是否用显影剂搅拌装置搅拌显影装置中的显影剂 当图像形成操作开始时的装置。