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    Image forming apparatus
    2.
    发明公开
    Image forming apparatus 审中-公开
    Bilderzeugungsvorrichtung

    公开(公告)号：EP2708957A2

    公开(公告)日：2014-03-19

    申请号：EP13183922.7

    申请日：2013-09-11

    申请人： Ricoh Company, Ltd.

    发明人： Tanaka, Shinya ,  Ishii, Hirokazu ,  Shimizu, Yasunobu ,  Nakamura, Keigo

    IPC分类号： G03G15/16

    CPC分类号： G03G15/16 ,  G03G15/1605 ,  G03G15/1675 ,  G03G2215/00717

    摘要： An image forming apparatus includes a power source (39) to output a voltage having an alternating waveform to transfer a toner image from an image bearing member (31) to a recording medium. A time-averaged value (Vave) of the voltage has a polarity in a transfer direction, in which the toner image is transferred from the image bearing member (31) to the recording medium, and an absolute value of the time-averaged value is greater than a midpoint value (Voff) of the voltage intermediate between a maximum value and a minimum value of the voltage. As a roughness of the recording medium increases, a duty ratio (Duty) expressed by A / (A+B) is reduced, where A is an area of the waveform of the voltage in a return direction opposite the transfer direction relative to the midpoint value in one cycle and B is an area in the transfer direction relative to the midpoint value.

    摘要翻译： 图像形成装置包括：电源（39），用于输出具有交替波形的电压，以将调色剂图像从图像承载部件（31）传送到记录介质。 电压的时间平均值（Vave）具有传送方向上的极性，其中调色剂图像从图像承载部件（31）传送到记录介质，并且时间平均值的绝对值为 大于电压的最大值和最小值之间的电压的中点值（Voff）。 随着记录介质的粗糙度的增加，由A /（A + B）表示的占空比（Duty）减小，其中A是与传送方向相反的返回方向上的电压的波形相对于中点 一个周期内的值，B是相对于中点值的传送方向的面积。

    Image forming apparatus
    5.
    发明公开
    Image forming apparatus 审中-公开
    成像设备

    公开(公告)号：EP2664967A3

    公开(公告)日：2017-06-14

    申请号：EP13166721.4

    申请日：2013-05-07

    申请人： Ricoh Company, Ltd.

    发明人： Tanaka, Shinya ,  Ishii, Hirokazu ,  Shimizu, Yasunobu ,  Nakamura, Keigo

    IPC分类号： G03G15/16

    CPC分类号： G03G15/1665 ,  G03G15/1675

    摘要： An image forming apparatus includes a transfer bias output device and an information receiving device (51; 52; 50). The transfer bias output device (39) outputs a transfer bias including a superimposed bias composed of an AC bias superimposed on a DC bias to form a transfer electric field in a transfer nip between an image bearing member (31) bearing a toner image and a nip forming member (36), to transfer the toner image onto a recording medium in the transfer nip. A controller operatively connected to the information receiving device (51; 52; 50) and the transfer bias output device causes the transfer bias output device to change a target output of a peak-to-peak voltage of the AC bias based on information received by the information receiving device (51; 52; 50) that affects transfer of the toner image and to reduce a target output of the DC bias as the target output value of the peak-to-peak voltage of the AC bias increases.

    摘要翻译： 一种图像形成设备包括转印偏压输出装置和信息接收装置（51; 52; 50）。 转印偏压输出装置（39）输出转印偏压，该转印偏压包括由叠加在DC偏压上的AC偏压构成的叠加偏压，以在承载调色剂图像的图像承载部件（31）与转印辊之间的转印夹持部中形成转印电场 （36），以将调色剂图像转印到转印夹中的记录介质上。 可操作地连接到信息接收装置（51; 52; 50）的控制器和转印偏压输出装置使转印偏压输出装置基于由信息接收装置（51; 52; 50）接收的信息改变AC偏压的峰 - 峰电压的目标输出 作为AC偏压的峰 - 峰电压的目标输出值增加，影响调色剂图像的转印并且减小DC偏压的目标输出的信息接收装置（51; 52; 50）。

    Image forming apparatus
    6.
    发明公开
    Image forming apparatus 审中-公开
    成像设备

    公开(公告)号：EP2821858A1

    公开(公告)日：2015-01-07

    申请号：EP14165635.5

    申请日：2014-04-23

    申请人： Ricoh Company, Ltd.

    发明人： Tanaka, Shinya ,  Ishii, Hirokazu ,  Kato, Tsutomu ,  Takahashi, Yasufumi ,  Mizutani, Takehide ,  Ichihashi, Osamu ,  Kato, Yuji ,  Nagata, Atsushi ,  Kuma, Kazuosa ,  Hasegawa, Ryo ,  Nagata, Haruki ,  Kochi, Naoto

    IPC分类号： G03G15/16

    摘要： An image forming apparatus includes an image carrier that carries a toner image; a transfer member that forms a transfer nip between the transfer member and the image carrier; and a power supply capable of outputting a superimposed transfer bias in which an alternating current component is superimposed onto a direct current component. The toner image on the image carrier is transferred onto a recording medium in the transfer nip by the superimposed transfer bias or a direct current bias consisting of the direct current component output by the power supply. The apparatus also includes a controller that controls the power supply so that an output target value of the direct current component when the direct current component rises up is larger than an output target value of the direct current component when the toner image is transferred onto the recording medium.

    摘要翻译： 一种图像形成设备，包括：承载调色剂图像的图像载体; 转印部件，其形成所述转印部件和所述图像载体之间的转印夹持部; 以及能够输出叠加的转印偏压的电源，其中交流分量叠加在直流分量上。 图像载体上的调色剂图像通过叠加的转印偏压或由电源输出的直流分量组成的直流偏压被转印到转印夹中的记录介质上。 该装置还包括控制器，该控制器控制电源，使得当直流分量上升时直流分量的输出目标值大于当调色剂图像被转印到记录时直流分量的输出目标值 中。

    Image forming apparatus
    7.
    发明公开
    Image forming apparatus 审中-公开
    Bilderzeugungsvorrichtung

    公开(公告)号：EP2664967A2

    公开(公告)日：2013-11-20

    申请号：EP13166721.4

    申请日：2013-05-07

    申请人： Ricoh Company, Ltd.

    发明人： Tanaka, Shinya ,  Ishii, Hirokazu ,  Shimizu, Yasunobu ,  Nakamura, Keigo

    IPC分类号： G03G15/16

    CPC分类号： G03G15/1665 ,  G03G15/1675

    摘要： An image forming apparatus includes a transfer bias output device and an information receiving device (51; 52; 50). The transfer bias output device (39) outputs a transfer bias including a superimposed bias composed of an AC bias superimposed on a DC bias to form a transfer electric field in a transfer nip between an image bearing member (31) bearing a toner image and a nip forming member (36), to transfer the toner image onto a recording medium in the transfer nip. A controller operatively connected to the information receiving device (51; 52; 50) and the transfer bias output device causes the transfer bias output device to change a target output of a peak-to-peak voltage of the AC bias based on information received by the information receiving device (51; 52; 50) that affects transfer of the toner image and to reduce a target output of the DC bias as the target output value of the peak-to-peak voltage of the AC bias increases.

    摘要翻译： 图像形成装置包括转印偏压输出装置和信息接收装置（51; 52; 50）。 转印偏压输出装置（39）输出包括由叠加在DC偏压上的AC偏压组成的叠加偏压的转印偏压，以在承载调色剂图像的图像承载部件（31）和 辊隙形成构件（36），以将调色剂图像转印到转印辊隙中的记录介质上。 可操作地连接到信息接收装置（51; 52; 50）和转移偏置输出装置的控制器使得转移偏压输出装置基于由AC电压接收到的信息改变AC偏压的峰 - 峰电压的目标输出 信息接收装置（51; 52; 50），其随着AC偏压的峰 - 峰电压的目标输出值增加而影响调色剂图像的转印并且减小DC偏压的目标输出。