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：US09164441B2

公开(公告)日：2015-10-20

申请号：US14282858

申请日：2014-05-20

Applicant: KONICA MINOLTA, INC.

Inventor： Kenji Tamaki ,  Takeshi Tamada ,  Kenji Yamamoto ,  Kosuke Sasaki ,  Shohei Otsu

IPC: G03G15/20

CPC classification number: G03G15/205

Abstract: An image forming apparatus is provided with a fixing unit in which flickers can be effectively reduced while inhibiting electric current imbalance. The fixing unit comprises a fixing heater, a switching unit for switching the fixing heater on/off with an AC power source, and a control unit which controls the switching unit to switch in units of the half wave period of the AC power source AC, and a storing unit for storing a plurality of energization patterns which define the ways of performing the switch control. Each energization pattern corresponds to a control cycle which contains a three or more odd number of the half wave periods each of which is either an OFF period and an ON period, and all the half wave periods of the smaller in number of the ON periods and the OFF periods are not successively arranged.

Abstract translation: 图像形成装置设置有固定单元，其中可以有效地减少闪烁，同时抑制电流不平衡。 定影单元包括定影加热器，用AC电源切换定影加热器的切换单元，以及控制单元，其以交流电源AC的半波周期为单位进行控制， 以及存储单元，用于存储限定执行开关控制的方式的多个通电模式。 每个通电模式对应于一个控制周期，该控制周期包含三个或更多奇数个半波周期，每个半波周期为OFF周期和导通周期，并且所有半波周期的数目的ON周期数和 关闭周期未连续排列。

公开(公告)号：US10191696B2

公开(公告)日：2019-01-29

申请号：US15790166

申请日：2017-10-23

Applicant: KONICA MINOLTA, INC.

Inventor： Akira Okamoto ,  Katsunori Takahashi ,  Takashi Nara ,  Kenji Yamamoto

IPC: G06F3/12

Abstract: An image forming system includes: a first image forming apparatus; and a second image forming apparatus connected on a downstream side of the first image forming apparatus in a paper conveying direction, wherein the first image forming apparatus includes: a first expander that expands a first image having image expansion time per page including first time; and a first image former that forms the first image expanded by the first expander, onto a first face of paper, and the second image forming apparatus includes: a second expander that expands a second image having image expansion time per page including second time longer than the first time; and a second image former that forms the second image expanded by the second expander, onto the first face on which the first image has been formed.

公开(公告)号：US11947298B2

公开(公告)日：2024-04-02

申请号：US17983139

申请日：2022-11-08

Applicant: Konica Minolta, Inc.

Inventor： Satoshi Ogata ,  Atsushi Yamaguchi ,  Kenji Yamamoto ,  Takashi Nara

IPC: G03G15/00

CPC classification number: G03G15/5062 ,  G03G15/6529 ,  G03G15/5029

Abstract: A recording material conveying device includes: a first conveyor that constitutes a conveyance path of a recording material; a second conveyor that branches from the first conveyor and constitutes a conveyance path of the recording material different from the conveyance path of the first conveyor; and a detector that detects recording material characteristics of the recording material, the detector being arranged in the second conveyor on a downstream side in a conveyance direction of the recording material with respect to a branch portion where the first conveyor and the second conveyor branch.

公开(公告)号：US09501005B2

公开(公告)日：2016-11-22

申请号：US14674987

申请日：2015-03-31

Applicant: KONICA MINOLTA, INC.

Inventor： Akira Okamoto ,  Kenji Yamamoto ,  Keigo Ogura ,  Takahiro Yokoya ,  Hiroyuki Futami

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2042

Abstract: A fixing device includes a roller, a plurality of heaters, a temperature detection unit, and a control unit, wherein when the temperature detection unit detects that the temperature of longitudinal end portions of the roller is lower than a preset reference temperature, the control unit performs full-lighting control on the heater with the largest amount of heat supply to the end portions of the roller, out of the plurality of heaters, and performs lighting control on the heater with the second largest amount of heat supply to the end portions of the roller in a pattern at a predetermined duty ratio, or performs lighting control on the heater with the largest amount of heat supply to the end portions of the roller in a pattern at a predetermined duty ratio, and turns off the heater with the second largest amount of heat supply to the end portions of the roller.

Abstract translation: 定影装置包括辊，多个加热器，温度检测单元和控制单元，其中当温度检测单元检测到辊的纵向端部的温度低于预设的参考温度时，控制单元 对多个加热器中的辊的端部供热量最大的加热器执行全光照明控制，并且对加热器进行第二最大热量的点亮控制 辊子以预定的占空比形成图案，或者以预定的占空比以图案的方式对辊的端部以最大的热量供给的加热器进行照明控制，并且关闭具有第二大的加热器 对辊的端部的供热量。

公开(公告)号：US10007215B2

公开(公告)日：2018-06-26

申请号：US15171683

申请日：2016-06-02

Applicant: Konica Minolta, Inc.

Inventor： Kenji Yamamoto ,  Kenji Tamaki

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2032 ,  G03G15/2053

Abstract: A fixing device includes: a fixing unit which heats a recording medium to fix a color material adhered to the recording medium; a first heater which heats the fixing unit; a second heater with rated power smaller than the rated power of the first heater which heats the fixing unit; and a controller which performs preliminary control of energizing the second heater when heating of the fixing unit by the first heater is started and energizing control of stepping up power consumption of the first heater and stepping down the power consumption of the second heater such that a change amount when a sum of the power consumption of the first heater and the power consumption of the second heater changes becomes a value to make a flicker value indicating a degree of a flicker not larger than a predetermined standard value after executing the preliminary control.