公开(公告)号：US09753398B2

公开(公告)日：2017-09-05

申请号：US14565202

申请日：2014-12-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shusuke Miura ,  Jiro Shirakata ,  Takayuki Iikura

IPC: G03G15/08 ,  G03G15/00

CPC classification number: G03G15/0856 ,  G03G15/086 ,  G03G15/556

Abstract: An image forming apparatus including: an image formation unit including an accumulation unit accumulating toner, and forms an image based on image data using the accumulated toner; a measurement unit measures toner density of an developer in the accumulation unit; a replenishment unit replenishes toner to the accumulation unit from an attached container; a first determination unit determines a first value based on the image data; a second determination unit determines a second value based on the measurement result of the measurement result; a third determination unit determines a third value by accumulating the second value; and a controller controls the replenishment unit based on the first value, the second value, and the third value, wherein in a case where the container has been replaced, the third determination unit changes the third value into a predetermined value before the difference is determined by the second determination unit.

公开(公告)号：US09483004B2

公开(公告)日：2016-11-01

申请号：US14995495

申请日：2016-01-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shusuke Miura ,  Jiro Shirakata ,  Kana Oshima

IPC: G03G15/08 ,  G03G15/00

CPC classification number: G03G15/556 ,  G03G15/0849 ,  G03G15/0851 ,  G03G15/0853 ,  G03G15/0856 ,  G03G15/0877

Abstract: A replenishment unit replenishes a storage unit with toner. A detection unit detects a toner density of developer in the storage unit. A stoppage unit stops, based on the toner density, an image forming operation. A first calculation unit controls the detection unit to detect the toner density in a duration from when the operation stops to when the image forming unit resumes the operation, and calculates a difference between the toner density and a target. A second calculation unit accumulates the difference to obtain a cumulative value. A determination unit determines a value for determining whether or not replenishment of the toner is required, based on the difference calculated and the cumulative value calculated. A controller controls a timing at which the replenishment unit replenishes the storage unit with the toner in the duration based on the value.

Abstract translation: 补充单元用调色剂补充存储单元。 检测单元检测存储单元中的显影剂的调色剂浓度。 基于调色剂浓度，停止单元停止图像形成操作。 第一计算单元控制检测单元检测从操作停止到图像形成单元恢复操作的持续时间中的调色剂浓度，并计算调色剂浓度和目标之间的差。 第二计算单元累积差以获得累积值。 确定单元基于计算的差值和计算的累积值来确定用于确定是否需要补充调色剂的值。 控制器基于该值控制补充单元在持续时间内用调色剂补充存储单元的定时。

公开(公告)号：US20160097991A1

公开(公告)日：2016-04-07

申请号：US14867420

申请日：2015-09-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kana Oshima ,  Jiro Shirakata ,  Shusuke Miura

IPC: G03G15/08

CPC classification number: G03G15/556 ,  G03G15/0853 ,  G03G15/0865

Abstract: An image forming apparatus capable of properly determining replacement time of a developer replenishment unit. An inductance sensor measures a toner density in a developing device. A counter counts the number of pixels of an image to be formed. A toner density-estimating section estimates a toner density in the developing device using the count value output from the counter and a toner replenishment signal output to supply toner from a toner bottle to the developing device. A toner replenishment amount error-estimating section estimates a toner replenishment amount error using the measured toner density and the estimated toner density. When a cumulative value of the toner replenishment amount error becomes equal to or smaller than a predetermined threshold value, it is determined that it is necessary to replace the toner bottle.

Abstract translation: 能够适当地确定显影剂补充单元的更换时间的图像形成装置。 电感传感器测量显影装置中的调色剂浓度。 计数器对要形成的图像的像素数进行计数。 调色剂浓度估计部分使用从计数器输出的计数值和输出的调色剂补充信号来估计显影装置中的调色剂浓度，以将调色剂从调色剂瓶供应到显影装置。 调色剂补充量误差估计部使用测量的调色剂浓度和估计的调色剂浓度来估计调色剂补充量误差。 当调色剂补充量误差的累计值变得等于或小于预定阈值时，确定需要更换调色剂瓶。

公开(公告)号：US10281854B2

公开(公告)日：2019-05-07

申请号：US15254881

申请日：2016-09-01

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kana Oshima ,  Jiro Shirakata ,  Shusuke Miura

IPC: G03G15/00 ,  G03G15/20

Abstract: An image forming apparatus includes an image forming unit, a fixing unit having a heating member for generating heat based on power supplied, a detection unit, and a controller. The image forming unit forms an image on a sheet. The fixing unit fixes the image on the sheet by the heat of the heating member. The detection unit detects a temperature of the heating member. The controller controls power to be supplied to the heating member based on a temperature detected by the detection unit. The controller determines a difference value between the temperature detected by the detection unit and a target temperature, determines an accumulated value by performing accumulation processing of the difference value, and controls the power based on the difference value and the accumulated value. The controller controls the accumulation processing based on the difference value and the accumulated value.

公开(公告)号：US09846399B2

公开(公告)日：2017-12-19

申请号：US15371846

申请日：2016-12-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kana Oshima ,  Shusuke Miura

IPC: G03G15/00 ,  G03G15/16

CPC classification number: G03G15/5054 ,  G03G15/1605 ,  G03G15/1615 ,  G03G2215/00156 ,  G03G2215/0129

Abstract: A position detection apparatus detects a position of a target in a predetermined direction. One end of a swinging member contacts the target, and the other end contacts a moving member. Sensors are arranged to output signals corresponding to a position of the moving member that corresponds to a position of the moving member. A detection unit detects the position of the target based on the output signals of the sensors. Measured parts are disposed on the moving member along loci of measuring positions of the sensors so that the sum total of the output signals becomes an even number. The detection unit determines that any one of the sensors failed in a case where the sum total of the output signals of the sensors is an odd number.

公开(公告)号：US20160209796A1

公开(公告)日：2016-07-21

申请号：US14995495

申请日：2016-01-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shusuke Miura ,  Jiro Shirakata ,  Kana Oshima

IPC: G03G15/08

CPC classification number: G03G15/556 ,  G03G15/0849 ,  G03G15/0851 ,  G03G15/0853 ,  G03G15/0856 ,  G03G15/0877

Abstract: A replenishment unit replenishes a storage unit with toner. A detection unit detects a toner density of developer in the storage unit. A stoppage unit stops, based on the toner density, an image forming operation. A first calculation unit controls the detection unit to detect the toner density in a duration from when the operation stops to when the image forming unit resumes the operation, and calculates a difference between the toner density and a target. A second calculation unit accumulates the difference to obtain a cumulative value. A determination unit determines a value for determining whether or not replenishment of the toner is required, based on the difference calculated and the cumulative value calculated. A controller controls a timing at which the replenishment unit replenishes the storage unit with the toner in the duration based on the value.

Abstract translation: 补充单元用调色剂补充存储单元。 检测单元检测存储单元中的显影剂的调色剂浓度。 基于调色剂浓度，停止单元停止图像形成操作。 第一计算单元控制检测单元检测从操作停止到图像形成单元恢复操作的持续时间中的调色剂浓度，并计算调色剂浓度和目标之间的差。 第二计算单元累积差以获得累积值。 确定单元基于计算的差值和计算的累积值来确定用于确定是否需要补充调色剂的值。 控制器基于该值控制补充单元在持续时间内用调色剂补充存储单元的定时。

公开(公告)号：US09977385B2

公开(公告)日：2018-05-22

申请号：US15264970

申请日：2016-09-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shusuke Miura ,  Hiroki Kawai

IPC: G03G15/00 ,  G03G15/20

CPC classification number: G03G15/5029 ,  G03G15/2042 ,  G03G15/2053 ,  G03G2215/00734 ,  G03G2215/2035

Abstract: An image forming apparatus includes a fixing film for fixing a toner image formed on a recording material, and first and second fixing heaters configured to heat the fixing film. The first fixing heater has a high heat generation region at a center portion in a width direction of a fixing nip portion and the second fixing heater has a high heat generation region at an end portion in the width direction of the fixing nip portion. A center portion temperature detection unit detects a center portion temperature of a center portion of the fixing film in the width direction. An end portion temperature detection unit detects an end portion temperature of an end portion of the fixing film in the width direction. A size detection unit detects a size of the recording material. A control unit controls a heat generation amount of the fixing heaters.

公开(公告)号：US20170168440A1

公开(公告)日：2017-06-15

申请号：US15371846

申请日：2016-12-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kana Oshima ,  Shusuke Miura

IPC: G03G15/01

CPC classification number: G03G15/5054 ,  G03G15/1605 ,  G03G15/1615 ,  G03G2215/00156 ,  G03G2215/0129

Abstract: A position detection apparatus detects a position of a target in a predetermined direction. One end of a swinging member contacts the target, and the other end contacts a moving member. Sensors are arranged to output signals corresponding to a position of the moving member that corresponds to a position of the moving member. A detection unit detects the position of the target based on the output signals of the sensors. Measured parts are disposed on the moving member along loci of measuring positions of the sensors so that the sum total of the output signals becomes an even number. The detection unit determines that any one of the sensors failed in a case where the sum total of the output signals of the sensors is an odd number.

公开(公告)号：US09523954B2

公开(公告)日：2016-12-20

申请号：US14867420

申请日：2015-09-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kana Oshima ,  Jiro Shirakata ,  Shusuke Miura

IPC: G03G15/00 ,  G03G15/08

CPC classification number: G03G15/556 ,  G03G15/0853 ,  G03G15/0865

Abstract: An image forming apparatus includes a photosensitive member, an exposure unit, a developing unit that develops an electrostatic latent image using toner, a detection unit that detects an amount of the toner contained in the developing unit, and a calculation unit that calculates a difference value between the amount of detected toner detected and a target toner amount. In addition, an accumulation unit accumulates the calculated difference value, and a controller controls toner replenishing based on the calculated difference value and the accumulated value. A determination unit determines, based on an amount of the consumed toner and an amount of the contained toner, whether or not an error of an amount of replenished toner is larger than a threshold value, and determines, based on the number of times that the error is determined, whether or not replacement of the container is required.

Abstract translation: 图像形成装置包括感光构件，曝光单元，使用调色剂显影静电潜像的显影单元，检测显影单元中包含的调色剂量的检测单元，以及计算单元， 在检测到的检测到的调色剂的量与目标调色剂量之间。 此外，积累单元累积计算出的差值，并且控制器基于计算的差值和累积值来控制调色剂补充。 确定单元基于消耗的调色剂的量和所含的调色剂的量来确定补充调色剂的量的误差是否大于阈值，并且基于所述调色剂的次数， 确定是否需要更换容器。

公开(公告)号：US20160202635A1

公开(公告)日：2016-07-14

申请号：US14982277

申请日：2015-12-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Jiro Shirakata ,  Shusuke Miura ,  Kana Oshima

IPC: G03G15/08

CPC classification number: G03G15/0877 ,  G03G15/0849 ,  G03G15/0893 ,  G03G15/556 ,  G03G2215/0888

Abstract: A latent image forming unit forms an electrostatic latent image corresponding to an image signal on an image carrier. A development unit includes a circulation mechanism for causing developer within a development unit to circulate, and develops the electrostatic latent image using the developer. A detector unit detects a toner density of the developer within the development unit. A determination unit determines a replenishment amount of toner to the development unit based on the toner density detected by the detector unit. A replenisher unit replenishes the development unit with toner in accordance with the replenishment amount. The control unit reduces a ripple that occurs in accordance with a period of circulation of the developer, by executing filter processing for reducing the ripple.

Abstract translation: 潜像形成单元在图像载体上形成对应于图像信号的静电潜像。 显影单元包括用于使显影单元内的显影剂循环并使用显影剂显影静电潜像的循环机构。 检测器单元检测显影单元内的显影剂的调色剂浓度。 确定单元基于由检测器单元检测到的调色剂浓度来确定调色剂对显影单元的补充量。 补充单元根据补充量用调色剂补充显影单元。 通过执行用于减小纹波的滤波处理，控制单元减少根据显影剂的循环周期发生的纹波。