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    • 3. 发明授权
    • Contact type charging device having voltage limiter
    • 具有限压器的接触式充电装置
    • US5287146A
    • 1994-02-15
    • US906458
    • 1992-06-30
    • Koji UnoYasuo TanakaTateki OkaHitoshi Saito
    • Koji UnoYasuo TanakaTateki OkaHitoshi Saito
    • G03G15/02G03G15/16G03G15/00
    • G03G15/0216G03G15/0283G03G15/1675
    • A contact type charging device having a contact member for making contact with the surface of a charge bearing member so as to apply an electric charge to the surface in an image forming apparatus of the electrophotographic type, and having a charging device which has a high resistance resistor connected serially to the contact member so as to apply a voltage to the contact member. The contact type charging device has a regulating member for regulating the upper limit of the absolute value of the voltage applied to the contact member to prevent excessive current flow to the contact member, or has a regulating member for regulating the lower limit of the absolute value of the voltage applied to the contact member to prevent a greater than necessary drop of the voltage applied to the charge bearing member.
    • 一种接触式充电装置,其具有用于与电荷承载部件的表面接触的接触部件,以便在电子照相型图像形成装置中的表面上施加电荷,并且具有高电阻的充电装置 电阻器串联连接到接触构件,以便向接触构件施加电压。 接触式充电装置具有用于调节施加到接触构件的电压的绝对值的上限的调节构件,以防止过大的电流流向接触构件,或具有用于调节绝对值的下限的调节构件 施加到接触构件的电压以防止施加到充电构件的电压大大降低。
    • 6. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US5893661A
    • 1999-04-13
    • US65419
    • 1998-04-24
    • Tetsuya SakaiYasuo TanakaKazuyoshi Hara
    • Tetsuya SakaiYasuo TanakaKazuyoshi Hara
    • G03G15/16G03G15/14
    • G03G15/1675
    • An image forming apparatus using the electrophotographic method in which a toner image formed on an image carrier is transferred to a transfer medium, the image forming apparatus being equipped with a fixed-voltage transfer controller that controls the transfer voltage such that it will be maintained at a prescribed voltage, a current detector that detects the transfer current, a voltage detector that detects the transfer voltage, and a switching controller that, when the transfer current detected by means of the current detector falls outside a prescribed range, switches from fixed-voltage transfer control performed by the fixed-voltage transfer controller to fixed-current transfer control in which the transfer current is controlled such that the transfer current will be maintained at a prescribed control current, the image forming apparatus performing optimal image transfer at all times by, after the switching, setting as a new voltage level the voltage level detected by means of the voltage detector while the fixed-current transfer control is active, and then returning once again to fixed-voltage transfer control by means of the fixed-voltage transfer controller.
    • 使用电子照相方法的图像形成装置,其中形成在图像载体上的调色剂图像被转印到转印介质上,图像形成装置配备有固定电压传送控制器,其控制转印电压,使其保持在 规定的电压,检测转印电流的电流检测器,检测转印电压的电压检测器,以及当通过电流检测器检测到的转印电流落在规定范围之外的开关控制器从固定电压 由固定电压转移控制器进行的转移控制到固定电流转移控制,其中转移电流被控制,使得转印电流将保持在规定的控制电流,图像形成装置始终通过最佳的图像转印, 切换后,设置为新的电压电平,通过该电平检测电压电平 电流检测器,同时固定电流传输控制有效,然后再次通过固定电压传输控制器返回固定电压传输控制。