公开(公告)号：US09651903B2

公开(公告)日：2017-05-16

申请号：US14710523

申请日：2015-05-12

Applicant: KONICA MINOLTA, INC.

Inventor： Takanobu Shiki ,  Kenji Tamaki ,  Kenji Yamamoto ,  Yukinobu Iguchi ,  Kosuke Sasaki ,  Shohei Otsu

IPC: G03G15/20

CPC classification number: G03G15/205 ,  G03G15/2039

Abstract: When changing the turn-on/off patterns, a controller of a fixing device sets a control interval of the turn-on/off pattern so as to be longer than a first period of time that does not exert any influence to a flicker value and to be shorter than a second period of time that does not exert any influence to a response to temperature control. The controller of the fixing device selects a third turn-on/off pattern in which power difference between power of a first turn-on/off pattern before the change in the turn-on/off pattern and power of a second turn-on/off pattern after the change in the turn-on/off pattern is smaller than a set reference power difference.

公开(公告)号：US11899999B2

公开(公告)日：2024-02-13

申请号：US17872501

申请日：2022-07-25

Applicant: Konica Minolta Inc.

Inventor： Akinori Kimata ,  Kenichi Hayashi ,  Shiro Umeda ,  Yukinobu Iguchi ,  Satoru Sasaki

IPC: G06F15/00 ,  G06F3/12

CPC classification number: G06F3/1258 ,  G06F3/1204 ,  G06F3/1256

Abstract: An image forming apparatus includes: a former that performs image formation on a sheet conveyed on a conveyance path; a first hardware processor that detects a type of the sheet on which the image is formed; a second hardware processor that receives specification of a type of a sheet from a user; and a third hardware processor that receives a user setting regarding the image formation, wherein the user setting includes a setting for allowing the former to continuously perform the image formation in a case where the sheet type detected by the first hardware processor is different from the sheet type specified by the user received by the second hardware processor.

公开(公告)号：US20190196388A1

公开(公告)日：2019-06-27

申请号：US16193541

申请日：2018-11-16

Applicant: KONICA MINOLTA, INC.

Inventor： Yukinobu Iguchi ,  Satoru Sasaki ,  Yoshihito Sasamoto ,  Naoto Sugaya ,  Kenichi Hayashi ,  Yohei Yamada

IPC: G03G15/00 ,  G03G15/20

CPC classification number: G03G15/80 ,  G03G15/2039

Abstract: A fixing apparatus includes: a fixing member including a heater as a heat source; and a hardware processor that uses pulse width modulation (PWM) control to control power supplied to the heater; wherein the hardware processor changes a duty of the PWM control within a half cycle of an input current of the PWM control.

公开(公告)号：US09639039B2

公开(公告)日：2017-05-02

申请号：US15145978

申请日：2016-05-04

Applicant: KONICA MINOLTA, INC.

Inventor： Takanobu Shiki ,  Tadayuki Ueda ,  Eiji Nishikawa ,  Yukinobu Iguchi ,  Satoshi Miyajima ,  Yohei Yamada

IPC: G03G15/20 ,  G03G15/00

CPC classification number: G03G15/2039 ,  G03G15/6594 ,  G03G2215/00738

Abstract: An image forming apparatus detects that the temperature of a fixing member reaches a lower limit value at which the temperature once reduced by the start of a heating and fixing process to a paper turns to rise, after an image forming operation starts, and determines the type of the paper based on at least one of an elapsed time from a predetermined reference time point after the image forming operation starts to a time point at which it is detected that the temperature reaches the lower limit value, and a temperature difference between the temperature of the fixing member at the reference time point and the lower limit value.

公开(公告)号：US09632464B2

公开(公告)日：2017-04-25

申请号：US15135027

申请日：2016-04-21

Applicant: Konica Minolta, Inc.

Inventor： Takanobu Shiki ,  Tadayuki Ueda ,  Eiji Nishikawa ,  Yukinobu Iguchi ,  Satoshi Miyajima ,  Yohei Yamada

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/205

Abstract: In an image forming apparatus according to the present invention, when an image forming operation is started from a standby state, electric power is supplied to a heater by switching to a first fixing control to turn on and off the heater to heat a heating roller with a fixed duty ratio based on the detected temperature of the heating roller, and thereafter, when detecting a state that the falling detected temperature reaches a lower limit value at which the detected temperature turns to rising, electric power is supplied to the heater by switching to a second fixing control which changes a duty ratio in accordance with a temperature difference between the detected temperature and a target control temperature.

公开(公告)号：US20240385561A1

公开(公告)日：2024-11-21

申请号：US18650849

申请日：2024-04-30

Applicant: Konica Minolta, Inc.

Inventor： Takashi Watanabe ,  Yoshikazu Watanabe ,  Yasuhiro Ishihara ,  Yukinobu Iguchi ,  Shougo Kamiya ,  Tatsuya Eguchi

IPC: G03G15/00

Abstract: An image forming system conveys a recording medium to form an image. The image forming system includes: a driver to drive an operation mechanism to convey a recording medium or an operation mechanism to form an image on the recording medium; a detector that detects a driving state of the driver; a diagnostic section diagnosing an abnormality of the operation mechanism based on a load obtained by converting a detection result by the detector based on a predetermined conversion condition; and an updater that, when at least one of components of the driver is replaced, updates the conversion condition in accordance with the replaced component.

公开(公告)号：US10264162B2

公开(公告)日：2019-04-16

申请号：US15659116

申请日：2017-07-25

Applicant: Konica Minolta, Inc.

Inventor： Kenichi Hayashi ,  Yohei Yamada ,  Yukinobu Iguchi ,  Satoru Sasaki

IPC: H04N1/60 ,  G01K11/12 ,  H04N1/00

Abstract: An image forming system includes: an image forming apparatus; and an image reading apparatus that reads an image, wherein temperature correction patches with the same color are formed at a reference position and a comparison position, the image reading apparatus includes: a scanner that reads respective colors of the temperature correction patches at the reference position and at the comparison position; and a colorimeter that performs colorimetry to the temperature correction patch at the reference position, the image forming apparatus includes: a detector that detects a temperature of the temperature correction patch at the reference position; a first calculator that calculates a color difference of color values of the temperature correction patches at the reference position and at the comparison position; and a second calculator that calculates a temperature distribution, and as a temperature difference between a first position and a second position increases, the color difference increases.