公开(公告)号：US20170235267A1

公开(公告)日：2017-08-17

申请号：US15414792

申请日：2017-01-25

申请人： KONICA MINOLTA, INC.

发明人： Yuji KOBAYASHI ,  Takaki KATO ,  Masayuki FUKUNAGA

IPC分类号： G03G15/00

CPC分类号： G03G15/5062 ,  G03G15/657 ,  G03G2215/00616 ,  G03G2215/00645 ,  G03G2215/0135

摘要： A device for detecting a travel distance of a sheet is provided. The device includes a light source for irradiating the sheet surface; an imaging sensor for capturing an image of a pattern of the sheet surface by light reflected from the sheet; a discrete Fourier transformation portion for performing discrete Fourier transformation on two patterns obtained by image capturing at a time interval by the imaging sensor; a high wave number component removal portion for using a threshold determined based on a cycle of concave-convex of the sheet surface to remove a high wave number component from the two patterns having been subjected to the discrete Fourier transformation; and a travel distance calculation portion for determining a travel distance of the sheet based on a phase relationship between the two patterns from which the high wave number component removal portion has removed the high wave number component.

公开(公告)号：US20200255248A1

公开(公告)日：2020-08-13

申请号：US16773188

申请日：2020-01-27

申请人： KONICA MINOLTA, INC.

发明人： Remi ISHIKAWA ,  Eiji NISHIKAWA ,  Satoshi MIYAJIMA ,  Masayuki FUKUNAGA

IPC分类号： B65H29/16 ,  B65H43/00 ,  G03G15/00 ,  G03G15/16

摘要： An image forming apparatus that has a transfer device that includes an intermediate transfer belt that is tensioned by a plurality of support rollers, a secondary transfer roller that faces one of the support rollers via the intermediate transfer belt, a cam that adjust a pressing force that presses the intermediate transfer belt by the secondary transfer roller, a motor that drives the cam, and a conveyor that conveys a recording medium to a transfer nip formed between the intermediate transfer belt and the secondary transfer roller is provided with a controller that controls an operation of the motor. The controller executes first control of operating the motor with a constant torque and stopping the motor when a rotation angular speed of the motor is less than or equal to a first threshold and second control of operating the motor at a predetermined timing to adjust a transfer nip amount.

公开(公告)号：US20190271932A1

公开(公告)日：2019-09-05

申请号：US16278630

申请日：2019-02-18

申请人： KONICA MINOLTA, INC.

发明人： Toshiaki TANAKA ,  Masayuki WATANABE ,  Masayuki FUKUNAGA ,  Mineo YAMAMOTO

IPC分类号： G03G15/20

摘要： An image forming device includes: a fixing device that includes a fixing rotary member and thermally fixes a toner image onto a recording sheet by the fixing rotary member; a temperature sensor that senses a temperature of the fixing rotary member as a fixing temperature; a driving unit that drives the fixing rotary member to rotate; a torque sensor that senses a torque value of the driving unit in a torque sensing period in which at least one of the fixing temperature and a driving speed falls within a predetermined range, the driving speed being a speed of the driving unit for driving the fixing rotary member to rotate; and a prediction unit that predicts an operating life of the fixing device based on the sensed torque value.

公开(公告)号：US20180144484A1

公开(公告)日：2018-05-24

申请号：US15812709

申请日：2017-11-14

申请人： KONICA MINOLTA, INC.

发明人： Takaki KATO ,  Yuji KOBAYASHI ,  Masayuki FUKUNAGA

IPC分类号： G06T7/262 ,  H04N1/00 ,  G06T7/00

摘要： A movement amount detecting device performs discrete Fourier transform onto N-th image data and N+1-th image data, thereby generating N-th wave number space data and N+1 -th wave number space data. The movement amount detecting device obtains a target speed of a sheet, and determines a cutoff value based on the obtained target speed and an exposure time in an image sensor. The movement amount detecting device calculates an amount of movement of the sheet based on a phase difference between the N-th wave number space data and the N+1-th wave number space data in a wave number component smaller than the cutoff value.

公开(公告)号：US20170227906A1

公开(公告)日：2017-08-10

申请号：US15422881

申请日：2017-02-02

申请人： KONICA MINOLTA, INC.

发明人： Takaki KATO ,  Yuji KOBAYASHI ,  Masayuki FUKUNAGA

IPC分类号： G03G15/00 ,  G01S17/06 ,  B41J2/385

CPC分类号： G03G15/5062 ,  G01S7/4918 ,  G01S17/06 ,  G01S17/50 ,  G01S17/88 ,  G03G15/6529 ,  G03G2215/00616 ,  G03G2215/00721 ,  G03G2215/0132

摘要： An emission unit of a displacement detector emits laser light to a range in a space in which a target moves. A detection unit detects a distribution of amounts of light reflected from a capture region in the predefined range. Based on a shift of speckle pattern indicated by a difference between the distributions of amounts of reflected light that the detection unit detects at different times, a calculation unit calculates a displacement of the target. A correction unit measures a speckle contrast from the distribution of amounts of reflected light, and based on an error between the measured value and a reference value, corrects the amount of laser light. The reference value is set to the value of a speckle contrast in a case in which the amounts of reflected light fall within the detectable range of the detection unit.

公开(公告)号：US20160194168A1

公开(公告)日：2016-07-07

申请号：US14982704

申请日：2015-12-29

申请人： Konica Minolta, Inc.

发明人： Takaki KATO ,  Toshinori INOMOTO ,  Masayuki FUKUNAGA ,  Isao WATANABE ,  Toshiaki TANAKA

IPC分类号： B65H7/12 ,  B65H7/20

CPC分类号： B65H7/125 ,  B65H2511/413 ,  B65H2511/524 ,  B65H2513/10 ,  B65H2515/112 ,  B65H2515/805 ,  B65H2553/414 ,  B65H2553/42 ,  B65H2557/51 ,  G03G15/703 ,  B65H2220/01 ,  B65H2220/03

摘要： A multi-feed detection apparatus for detecting multi-feed of a sheet conveyed along a paper path is provided. The apparatus includes a first movement amount sensor disposed on the paper path to face a first surface of the sheet to detect a movement amount of the sheet; a second movement amount sensor disposed, on the paper path, in a position at which the first movement amount sensor is disposed to face a second surface of the sheet to detect a movement amount of the sheet; and a determination portion configured to determine that a conveyance state of the sheet is multi-feed when a difference between the movement amount of the sheet detected by the first movement amount sensor and the movement amount of the sheet detected by the second movement amount sensor is equal to or greater than a threshold.

摘要翻译： 提供了用于检测沿着纸张路径传送的纸张的多次进给的多进给检测装置。 该装置包括：第一移动量传感器，设置在纸张路径上以面对纸张的第一表面，以检测纸张的移动量; 第二移动量传感器，其设置在所述纸路径上，所述第二移动量传感器设置在与所述片材的第二表面相对的所述第一移动量传感器的位置，以检测所述片材的移动量; 以及确定部，其被配置为当由所述第一移动量传感器检测到的所述片材的移动量与由所述第二移动量传感器检测到的所述片材的移动量之间的差异是所述片材的传送状态是多页进给时， 等于或大于阈值。