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    • 24. 发明授权
    • Fixing apparatus comprising circuit for suppressing heat generation according to rotation detection signal
    • 固定装置包括根据旋转检测信号抑制发热的电路
    • US08494389B2
    • 2013-07-23
    • US13473245
    • 2012-05-16
    • Hiroshi Takami
    • Hiroshi Takami
    • G03G15/20
    • G03G15/5004G03G15/2039G03G2215/2035
    • A fixing apparatus that conveys a printing medium to a fixing nip portion formed by rotating members, and fixes an image onto the printing medium by heat from heating elements. The fixing apparatus also includes a safety element, a rotation detection circuit, and a limiting circuit. The safety element is in a power supply path to supply electrical power to the heating elements and to shut off the path in response with an abnormal temperature. The rotation detection circuit detects a rotation state of the rotating members. The limiting circuit limits a drive of a second driving circuit per a rotation detection circuit output. A first driving circuit detects that the circuit drives a first heating element per a control signal, regardless of the rotating members rotation state, and the second driving circuit drives a second heating element per a control signal and the output from the rotation detection circuit.
    • 一种定影装置,其将打印介质传送到由旋转构件形成的定影夹持部分,并且通过加热元件的热​​将图像定影到打印介质上。 定影装置还包括安全元件,旋转检测电路和限制电路。 安全元件处于供电路径中,用于向加热元件提供电力并且响应于异常温度来切断路径。 旋转检测电路检测旋转构件的旋转状态。 限制电路限制每个旋转检测电路输出的第二驱动电路的驱动。 第一驱动电路检测出电路根据控制信号驱动第一加热元件,而不管旋转构件旋转状态如何,并且第二驱动电路根据控制信号和旋转检测电路的输出驱动第二加热元件。
    • 25. 发明申请
    • FIXING APPARATUS
    • 固定装置
    • US20120224874A1
    • 2012-09-06
    • US13473245
    • 2012-05-16
    • Hiroshi Takami
    • Hiroshi Takami
    • G03G15/20
    • G03G15/5004G03G15/2039G03G2215/2035
    • A fixing apparatus that conveys a printing medium to a fixing nip portion formed by rotating members, and fixes an image onto the printing medium by heat from heating elements. The fixing apparatus also includes a safety element, a rotation detection circuit, and a limiting circuit. The safety element is in a power supply path to supply electrical power to the heating elements and to shut off the path in response with an abnormal temperature. The rotation detection circuit detects a rotation state of the rotating members. The limiting circuit limits a drive of a second driving circuit per a rotation detection circuit output. A first driving circuit detects that the circuit drives a first heating element per a control signal, regardless of the rotating members rotation state, and the second driving circuit drives a second heating element per a control signal and the output from the rotation detection circuit.
    • 一种定影装置,其将打印介质传送到由旋转构件形成的定影夹持部分,并且通过加热元件的热​​将图像定影到打印介质上。 定影装置还包括安全元件,旋转检测电路和限制电路。 安全元件处于供电路径中,用于向加热元件提供电力并且响应于异常温度来切断路径。 旋转检测电路检测旋转构件的旋转状态。 限制电路限制每个旋转检测电路输出的第二驱动电路的驱动。 第一驱动电路检测出电路根据控制信号驱动第一加热元件,而不管旋转构件旋转状态如何,并且第二驱动电路根据控制信号和旋转检测电路的输出驱动第二加热元件。
    • 26. 发明授权
    • Image fixing apparatus with safety relay and control thereof
    • 具有安全继电器及其控制的图像定影装置
    • US08139963B2
    • 2012-03-20
    • US12417279
    • 2009-04-02
    • Hiroshi Takami
    • Hiroshi Takami
    • G03G15/20
    • G03G15/80G03G15/2042G03G2215/2035G03G2221/1639
    • An image fixing apparatus has an integration circuit which is provided in a signal path from a comparison circuit to a relay drive circuit and integrates a signal input to the integration circuit, wherein an integral value of the signal input to said integration circuit reaches a reference value; and a latch circuit having an input port connected to a signal path from said integration circuit to the relay drive circuit and an output port connected to a signal path from the comparison circuit to the integration circuit. The latch circuit continuously transmits a signal from said output port to the integration circuit, upon a change in a signal level of the input port so that the relay is switched to the open position, and latches the relay in the open position.
    • 图像定影装置具有集成电路,其设置在从比较电路到继电器驱动电路的信号路径中,并且对输入到积分电路的信号进行积分,其中输入到所述积分电路的信号的积分值达到基准值 ; 以及锁存电路,其具有连接到从所述积分电路到继电器驱动电路的信号路径的输入端口以及连接到从比较电路到积分电路的信号路径的输出端口。 当输入端口的信号电平发生变化时,锁存电路将信号从所述输出端口连续发送到积分电路,使得继电器切换到打开位置,并将继电器锁定在打开位置。
    • 28. 发明授权
    • Image heating apparatus and heater used therefor
    • 用于此的图像加热装置和加热器
    • US07193181B2
    • 2007-03-20
    • US11154546
    • 2005-06-17
    • Tomoyuki MakihiraHiroshi TakamiHiroaki SakaiAkira KatoAtsushi IwasakiYasunari KobaruMasaru Tsukada
    • Tomoyuki MakihiraHiroshi TakamiHiroaki SakaiAkira KatoAtsushi IwasakiYasunari KobaruMasaru Tsukada
    • G03G15/20H05B3/02
    • G03G15/2042G03G2215/2035
    • The image heating apparatus for heating an image formed on a recording material includes a heater having a substrate and first and second heat generating resistors, most of the region of said first heat generating resistor having smaller resistance value per unit length toward an end in the longitudinal direction of said substrate, and most of the region of said second heat generating resistor having larger resistance value per unit length toward the end part; wherein a safety element can control electrical power supply to said first heat generating resistor and electrical power supply to said second heat generating resistor individually, and operates in response to the heat of said heater to cut off electrical power supply to said first and second heat generating resistors; and wherein only said second heat generating resistor in said first and second heat generating resistors has a high resistance part high resistance part corresponding to said safety element in a part in the longitudinal direction thereof; and consequently, this can provide an image heating apparatus that can cut off electrical power supply quickly when a heater has run away and to provide a heater to be used in this apparatus.
    • 用于加热形成在记录材料上的图像的图像加热装置包括具有基板和第一和第二发热电阻器的加热器,所述第一发热电阻器的大部分区域在纵向方向上的每单位长度的电阻值较小 并且所述第二发热电阻器的大部分区域朝向端部具有每单位长度的较大电阻值; 其中安全元件可以单独地控制对所述第一发热电阻器的电力供应和对所述第二发热电阻器的电力供应,并且响应于所述加热器的热量而操作以切断对所述第一和第二发热量的电力供应 电阻; 并且其中在所述第一和第二发热电阻器中只有所述第二发热电阻器具有在其长度方向上的一部分中对应于所述安全元件的高电阻部分; 并且因此,这可以提供一种当加热器已经脱离时可以快速地切断电力供应并且提供要在该装置中使用的加热器的图像加热装置。
    • 29. 发明授权
    • Charge voltage control circuit and image forming apparatus which controls a charge voltage based on a discharge current
    • 充电电压控制电路和基于放电电流控制充电电压的图像形成装置
    • US07139501B2
    • 2006-11-21
    • US10985931
    • 2004-11-12
    • Hiroshi TakamiHiroaki Sakai
    • Hiroshi TakamiHiroaki Sakai
    • G03G15/00
    • G03G15/0283G03G15/0266
    • An image forming apparatus includes a control voltage generation circuit which inputs a primary AC voltage to the primary side of a voltage transformer, generates a control voltage corresponding to a current generated on the secondary side of the voltage transformer in accordance with the primary AC voltage, and controls the primary AC voltage on the basis of the control voltage and a control signal, a current detection circuit which is connected, through a capacitor, to a path which supplies the current generated on the secondary side of the voltage transformer to a charge roller and detects a charge current to charge an image carrier, and a control circuit which determines the control signal on the basis of the relationship between a predetermined control signal (PRICNT) and a current value (Icap) detected by the current detection circuit in accordance with the predetermined control signal and controls the primary AC voltage to be generated by the voltage generation circuit.
    • 图像形成装置包括控制电压产生电路,其将初级交流电压输入到电压互感器的初级侧,根据初级交流电压产生与电压互感器的二次侧产生的电流相对应的控制电压, 并且基于控制电压控制主交流电压,以及控制信号,电流检测电路通过电容器连接到将电压互感器的次级侧上产生的电流提供给充电辊的路径 并且检测充电电流以对图像载体充电;以及控制电路,其基于由根据电流检测电路检测到的预定控制信号(PRICNT)和电流值(Icap)之间的关系确定控制信号 该预定控制信号并且控制由该电压产生电路产生的一次交流电压。
    • 30. 发明申请
    • Heat fusing apparatus, method of controlling same and image forming apparatus
    • 热熔设备,其控制方法和成像设备
    • US20050258158A1
    • 2005-11-24
    • US11116280
    • 2005-04-28
    • Hiroshi TakamiTomoyuki Makihira
    • Hiroshi TakamiTomoyuki Makihira
    • G03G15/20G05D23/24H05B1/00
    • G03G15/2042G03G2215/2035G05D23/1932G05D23/24
    • Disclosed is a heat fusing apparatus for thermally fusing toner that has been transferred to a printing medium from a toner image formed on an image bearing member using an electrophotographic process. Temperature is detected at the surface of a heating element or in the vicinity thereof. If control is performed so as to interrupt supply of power to the heating element based upon result of comparing the detected temperature and a reference value, the amount of current that flows into the heating element is detected and the reference value is changed over in accordance with the result of detection. Further, a pressure roller, which is a rotation member placed opposite the heating element, presses the printing medium against the heating element and transports the printing medium. The state of rotation of the roller is detected and the reference value is changed over in accordance with the result of detection. The apparatus prevents, without malfunction at the time of normal operation, the occurrence of a situation in which the entire fusing apparatus and peripheral devices must be repaired or replaced owing to overheating, and minimizes apparatus damage to thereby minimize the cost of replacement parts and service cost.
    • 公开了一种热定影装置,其用于使用电子照相方法从形成在图像承载部件上的调色剂图像转印到打印介质上的热定影调色剂。 在加热元件的表面或其附近检测温度。 如果根据比较检测到的温度和基准值的结果,进行控制以中断对加热元件的供电,则检测到流入加热元件的电流量,并根据 检测结果。 此外,作为与加热元件相对放置的旋转构件的压力辊将打印介质压靠在加热元件上并传送打印介质。 检测辊的旋转状态,并根据检测结果将基准值切换。 该设备在正常操作时无故障地防止了整个定影设备和外围设备由于过热而被修理或更换的情况的发生,并使设备损坏最小化,从而使更换部件和服务的成本最小化 成本。