公开(公告)号：US09417565B2

公开(公告)日：2016-08-16

申请号：US14789606

申请日：2015-07-01

Applicant: RICOH COMPANY, LTD.

Inventor： Yoshiki Hozumi ,  Naoki Iwaya ,  Yasufumi Takahashi ,  Masaharu Furuya ,  Naomi Sugimoto ,  Kazuchika Saeki

IPC: G03G15/00 ,  B65H3/06 ,  B65H5/02 ,  G03G15/16

CPC classification number: G03G15/1615 ,  B65H3/06 ,  B65H3/0669 ,  B65H5/023 ,  G03G15/6529 ,  G03G15/657 ,  G03G2215/00135 ,  G03G2215/00143 ,  G03G2215/00156

Abstract: A conveyor system includes a first conveyor belt entrained about a separation roller and a support roller disposed upstream from the separation roller, a second conveyor belt entrained about a first roller disposed at an uppermost stream in a transport direction of a sheet-type medium and a second roller disposed downstream therefrom, a belt alignment device to tilt a rotary shaft of the separation roller to restrict a range of belt mistracking of the first conveyor belt in a width direction thereof within a predetermined range, and a restriction member to restrict an amount of inclination of the rotary shaft such that a hypothetical extended plane, which is a hypothetical extension of the outer circumferential surface of the first conveyor belt between the separation roller and the support roller to a downstream side in the transport direction, does not contact a rotational center axis of the first roller.

公开(公告)号：US10088781B2

公开(公告)日：2018-10-02

申请号：US15389810

申请日：2016-12-23

Applicant: RICOH COMPANY, LTD.

Inventor： Shinya Tanaka ,  Naomi Sugimoto ,  Haruo Iimura ,  Shinji Aoki ,  Yasuhiko Ogino ,  Kazuchika Saeki ,  Keigo Nakamura

IPC: G03G15/16 ,  G03G15/01 ,  G03G15/00

Abstract: An image forming apparatus includes a transfer member configured to abut against an image carrier for carrying a toner image to form a transfer nip; and a power supply configured to output a bias voltage for transferring the toner image on the image carrier onto a recording medium nipped in the transfer nip. The bias voltage includes a first voltage for transferring the toner image from the image carrier onto the recording medium in a transfer direction and a second voltage having an opposite polarity of the first voltage, the first and the second voltages being alternately output. A time-averaged value of the bias voltage is set to a polarity in the transfer direction and is set in the transfer direction side with respect to a median between a maximum and a minimum of the bias voltage.

公开(公告)号：US09563153B2

公开(公告)日：2017-02-07

申请号：US15046185

申请日：2016-02-17

Applicant: RICOH COMPANY, LTD.

Inventor： Shinya Tanaka ,  Naomi Sugimoto ,  Haruo Iimura ,  Shinji Aoki ,  Yasuhiko Ogino ,  Kazuchika Saeki ,  Keigo Nakamura

IPC: G03G15/16 ,  G03G15/01

CPC classification number: G03G15/1675 ,  G03G15/0131 ,  G03G15/0189 ,  G03G15/1665 ,  G03G15/80

Abstract: An image forming apparatus includes a transfer member configured to abut against an image carrier for carrying a toner image to form a transfer nip; and a power supply configured to output a bias voltage for transferring the toner image on the image carrier onto a recording medium nipped in the transfer nip. The bias voltage includes a first voltage for transferring the toner image from the image carrier onto the recording medium in a transfer direction and a second voltage having an opposite polarity of the first voltage, the first and the second voltages being alternately output. A time-averaged value of the bias voltage is set to a polarity in the transfer direction and is set in the transfer direction side with respect to a median between a maximum and a minimum of the bias voltage.

Abstract translation: 图像形成装置包括：传送构件，被配置为抵靠用于承载调色剂图像的图像载体以形成转印夹持部; 以及电源，被配置为输出用于将图像载体上的调色剂图像转印到夹在转印夹持部中的记录介质上的偏置电压。 偏置电压包括用于将调色剂图像从传送方向从图像载体转印到记录介质上的第一电压和具有与第一电压相反极性的第二电压，第一和第二电压被交替地输出。 将偏置电压的时间平均值设定为传送方向上的极性，并相对于偏置电压的最大值和最小值之间的中值设定在传送方向侧。