公开(公告)号：US12210306B2

公开(公告)日：2025-01-28

申请号：US18134262

申请日：2023-04-13

Applicant: KONICA MINOLTA, INC.

Inventor： Yuhei Tatsumoto ,  Akimasa Ishikawa ,  Makoto Shimazoe ,  Yuta Tachibana ,  Kouei Cho

IPC: G03G15/00 ,  G06K15/00

Abstract: Provided is an image forming system capable of accurately detecting the resistance of a recording material. The image forming system includes an application roller that applies a voltage to a recording material on a conveyance path, and a controller that calculates the electric resistance of the recording material from a relationship between the voltage applied to the application roller and a current. The controller calculates the resistance of the recording material based on first profile information that is acquired by changing the applied voltage and corresponds to a change in the resistance of the application roller, and second profile information that is acquired by changing the applied voltage in a state where the recording material is sandwiched and corresponds to the change in the resistance of the application roller.

公开(公告)号：US20210078813A1

公开(公告)日：2021-03-18

申请号：US17020220

申请日：2020-09-14

Applicant: Konica Minolta, Inc.

Inventor： Yumiko Izumiya ,  Satoshi Ogata ,  Kazutoshi Yoshimura ,  Hitoshi Asano ,  Hirotada Seki ,  Akimasa Ishikawa ,  Masashi Sugano ,  Tsuyoshi Yoneyama ,  Hiroyuki Maruyama

IPC: B65H5/06 ,  G03G15/00 ,  B65H7/14

Abstract: Provided is a recording medium detection device which prevents a recording medium from jamming. The device comprises: a first roller and a second roller which nip and transport a recording medium; a roller shaft which rotatably supports the second roller; a shaft support; and a displacement detector. The shaft support supports the roller shaft movably in the thickness direction of the recording medium. The displacement detector detects displacement of the second roller in the thickness direction. The shaft support further supports the second roller movably in the transportation direction of the recording medium through the roller shaft.

公开(公告)号：US10133218B2

公开(公告)日：2018-11-20

申请号：US15793765

申请日：2017-10-25

Applicant: Konica Minolta, Inc.

Inventor： Junichi Masuda ,  Mikiyuki Aoki ,  Toru Kasamatsu ,  Masahiro Nonoyama ,  Akimasa Ishikawa

IPC: G03G15/20 ,  G03G15/00

Abstract: A phase control device includes: at least one switching element connected to an AC power source, the switching element being capable of: turning on and off at specified timings; delivering AC power to a load upon turn-on and cutting it off upon turn-off; and keeping an on-time from the start to the end of turn-on and an off-time from the start to the end of turn-off, the on-time and off-time being variable; a timing setting portion that sets a turn-on and turn-off timing for turning on and off the switching element; a judgment portion that judges whether or not the turn-on and turn-off timing are on at a phase within a first or second phase range; and a processor that starts turning on and off the switching element at the turn-on and turn-off timing, the processor being capable of adjusting the on-time and off-time depending on the judgment result.

公开(公告)号：US09503003B2

公开(公告)日：2016-11-22

申请号：US14332987

申请日：2014-07-16

Applicant: KONICA MINOLTA, INC.

Inventor： Takahiro Tsujimoto ,  Hideki Nakamura ,  Takeshi Ishida ,  Naoto Sugaya ,  Akimasa Ishikawa

IPC: H02P8/00 ,  G05B5/00 ,  H02P8/12 ,  G03G15/00 ,  G03G15/06

CPC classification number: H02P8/12 ,  G03G15/06 ,  G03G15/5008 ,  G03G15/6529

Abstract: An image forming apparatus drives and rotates at least one of a photosensitive drum and a transport roller with use of a stepping motor in a multi-phase excitation mode. The image forming apparatus includes: a constant-voltage control unit controlling the stepping motor by applying a constant voltage for each phase; a constant-current control unit controlling the stepping motor by regulating an amount of current for each phase by a chopping control; a measuring unit measuring a chopping count of each phase on a per-step basis; a chopping count determination unit determining whether the chopping count of each phase is less than or equal to a predetermined count; and a control switching unit causing the constant-voltage control unit to control the stepping motor when the chopping count determination unit determines affirmatively, and causing the constant-current control unit to control the stepping motor when the chopping count determination unit determines negatively.

Abstract translation: 图像形成装置利用多相励磁模式中的步进电机来驱动和旋转感光鼓和输送辊中的至少一个。 图像形成装置包括：恒压控制单元，通过对各相施加恒定电压来控制步进电动机; 恒流控制单元，其通过斩波控制来调节各相的电流量来控制所述步进电动机; 测量单元，测量每个阶段的每个阶段的切碎计数; 斩波计数确定单元，确定每相的斩波计数是否小于或等于预定计数; 以及控制切换单元，其使得所述恒压控制单元在所述切断计数确定单元肯定地确定时控制所述步进电机，并且当所述切断计数确定单元判定为否定时，使所述恒流控制单元控制所述步进电机。