公开(公告)号：US20220091531A1

公开(公告)日：2022-03-24

申请号：US17474508

申请日：2021-09-14

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshihiro YAMAGISHI ,  Tamotsu SHIMIZU ,  Kazunori TANAKA

IPC: G03G15/02 ,  G03G15/06 ,  G03G15/00

Abstract: An image forming apparatus includes an image carrier, a charging device, a developing device, a transfer device, a development power supply, a current measurement device, and a processor. The development power supply applies a predetermined bias voltage to the developing device. The processor functions as a calculator and a controller. The calculator calculates a surface potential of the image carrier based on the development current measured by the current measurement device. The controller controls the charging device, the developing device, the transfer device, and the development power supply. The controller sets a tentative transfer current to be flowed through the transfer device while the calculator calculates the surface potential.

公开(公告)号：US20210302869A1

公开(公告)日：2021-09-30

申请号：US17210390

申请日：2021-03-23

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazunori TANAKA ,  Yoshihiro YAMAGISHI ,  Tamotsu SHIMIZU

IPC: G03G15/06 ,  G03G15/02 ,  G03G15/00

Abstract: An image forming apparatus includes: a development device which develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger which charges the photosensitive drum; a development power supply which applies a bias voltage to the development device; a calculating section which calculates a surface potential of the photosensitive drum based on a development current flowing in the development device; and an estimating section which estimates a fogging toner amount. The fogging toner amount is an amount of toner moved due to fogging. When the fogging toner amount estimated by the estimating section is less than a prescribed threshold, the calculating section calculates a value of the bias voltage at which the development current stops flowing as the surface potential.

公开(公告)号：US20210302868A1

公开(公告)日：2021-09-30

申请号：US17210345

申请日：2021-03-23

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazunori TANAKA ,  Yoshihiro YAMAGISHI ,  Tamotsu SHIMIZU

IPC: G03G15/06

Abstract: An image forming apparatus includes: a development device which develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger which charges the photosensitive drum; a development power supply which applies a bias voltage to the development device; an electric current measuring section which measures a development current flowing in the development device; and a calculating section which calculates a surface potential of the photosensitive drum based on the development current. The charger applies charging biases to the photosensitive drum. The electric current measuring section measures a corresponding value of the development current for each development bias voltage applied to the development device. The calculating section calculates, per charging bias, a development bias voltage at which the development current stops flowing as the surface potential, and calculates a correspondence between the surface potential and the charging bias based on calculated values of the surface potential.

公开(公告)号：US20170102655A1

公开(公告)日：2017-04-13

申请号：US15265525

申请日：2016-09-14

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshihiro YAMAGISHI ,  Kotatsu KAWAGUCHI ,  Takashi EIKI ,  Takefumi YOTSUTSUJI

IPC: G03G15/20

CPC classification number: G03G15/206 ,  G03G15/2053 ,  G03G2215/2035

Abstract: A fixing device includes a fixing belt rotatably located around a rotation axis, a pressure member rotatably located, and a pressing member. The pressure member is brought into pressure contact with the fixing belt to form a fixing nip. The pressing member includes a pressing surface that presses the fixing belt toward a side of the pressure member. The pressing surface includes a plane surface portion extending along a conveyance direction of a recording medium, and a curved surface portion located at a downstream side of the plane surface portion in the conveyance direction of the recording medium. The curved surface portion is curved along an outer peripheral surface of the pressure member. The curved surface portion has a curvature radius larger than a curvature radius of the outer peripheral surface of the pressure member before a deformation in association with a formation of the fixing nip.

公开(公告)号：US20160216665A1

公开(公告)日：2016-07-28

申请号：US14994751

申请日：2016-01-13

Applicant: KYOCERA Document Solutions Inc.

Inventor： Takefumi YOTSUTSUJI ,  Yoshihiro YAMAGISHI ,  Takashi EIKI

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  B65G2811/093 ,  G03G15/205 ,  G03G15/2053 ,  G03G2215/00156 ,  G03G2215/2016 ,  G03G2215/2035

Abstract: A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member, a temperature sensor and a controller. A detected region whose temperature is detected by the temperature sensor is formed in the fixing belt, and an elastic layer of the detected region is provided with a hole in a part thereof in a circumferential direction. The controller judges that the fixing belt is rotating in a case where the temperature detected by the temperature sensor alternately increases and decreases in a state that the heat source is heating the fixing belt, and judges that the fixing belt is not rotating in a case where the temperature detected by the temperature sensor does not alternately increase and decrease in the state that the heat source is heating the fixing belt.

Abstract translation: 定影装置包括定影带，加压构件，热源，按压构件，温度传感器和控制器。 在定影带上形成有由温度传感器检测出温度的检测区域，检测区域的弹性层的圆周方向上设有孔。 在热源正在加热定影带的状态下，由温度传感器检测到的温度交替地升高并降低的情况下，控制器判断为定影带旋转，并判断在定影带不旋转的情况下， 在热源加热定影带的状态下，温度传感器检测到的温度不会交替地增加和减少。

公开(公告)号：US20160132004A1

公开(公告)日：2016-05-12

申请号：US14925396

申请日：2015-10-28

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Yoshihiro YAMAGISHI ,  Satoshi ISHII ,  Takashi EIKI ,  Takefumi YOTSUTSUJI

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2017 ,  G03G2215/2035

Abstract: A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member, a heating stop device and a deformation preventing member. The deformation preventing member is configured to face an inner circumferential face of the fixing belt. In a state where the fixing belt is not broken in a circumferential direction, the fixing belt and the deformation preventing member are arranged at an interval, and when the fixing belt is broken in the circumferential direction, the fixing belt is deformed and comes into contact with the deformation preventing member so that the fixing belt is prevented from being deformed to a side far from the heating stop device.

Abstract translation: 固定装置包括定影带，加压构件，热源，按压构件，加热停止装置和变形防止构件。 防变形构件构成为面对定影带的内周面。 在定影带在圆周方向上不断裂的状态下，定影带和变形防止部件间隔设置，当定影带在圆周方向上断裂时，定影带变形并接触 与变形防止构件一起防止定影带变形到远离加热停止装置的一侧。

公开(公告)号：US20150248088A1

公开(公告)日：2015-09-03

申请号：US14628489

申请日：2015-02-23

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshiharu KANEMATSU ,  Yoshihiro YAMAGISHI

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2042 ,  G03G15/2046 ,  G03G2215/2022 ,  G03G2215/2029 ,  G03G2215/2038

Abstract: A fixing device according to one aspect of the present disclosure includes a fixing belt, a pressure member, a heating member, a pressing member, and a heat source. The fixing belt is rotational. The pressure member is rotational and is brought into press-contact with the fixing belt to form a fixing nip. The heating member is rotational and is disposed to interpose the fixing belt between the heating member and the pressure member. The pressing member is disposed to interpose the fixing belt between the pressing member and the pressure member and presses the fixing belt toward the pressure member side. The heat source is disposed radially inside the fixing belt and radially outside the heating member. Radiant heat radiated from the heat source directly reaches the fixing belt, the heating member, and the pressing member.

Abstract translation: 根据本公开的一个方面的定影装置包括定影带，压力构件，加热构件，按压构件和热源。 定影带是旋转的。 压力构件是旋转的并且与定影带压力接触以形成定影辊隙。 加热构件是旋转的并且设置成将定影带插入在加热构件和压力构件之间。 按压构件设置成将定影带介于按压构件和压力构件之间，并将定影带朝向压力构件侧推压。 热源径向设置在定影带的内部并且在加热构件的径向外侧。 从热源辐射的辐射热直接到达定影带，加热构件和按压构件。

公开(公告)号：US20230019917A1

公开(公告)日：2023-01-19

申请号：US17812097

申请日：2022-07-12

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Yoshihiro YAMAGISHI ,  Kazunori TANAKA

IPC: G03G15/06 ,  G03G15/00

Abstract: An image forming apparatus includes image forming units. A controller includes an execution section, a measurement section, and a prediction section. The execution section controls execution of a developer refresh operation in which toner is ejected from a developer bearing member to an image bearing member so that a specific image forming unit replenishes a development device with the toner from the developer bearing member. The measurement section measures respective surface potentials of the image bearing members included in other image forming units while the specific image forming unit is executing the developer refresh operation. The prediction section uses measurement results of the respective surface potentials of the image bearing members included in the other image forming units for a prediction on the surface potential of the image bearing member included in the specific image forming unit.

公开(公告)号：US20210302859A1

公开(公告)日：2021-09-30

申请号：US17210901

申请日：2021-03-24

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazunori TANAKA ,  Yoshihiro YAMAGISHI ,  Tamotsu SHIMIZU

IPC: G03G15/02 ,  G03G15/00

Abstract: An image forming apparatus includes: a development device which develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger which charges the photosensitive drum; a development power supply which applies a prescribed bias voltage to the development device; and a calculating section which calculates a surface potential of the photosensitive drum based on a development current flowing in the development device. The calculating section calculates, as the surface potential, a bias voltage at which a non-charging development current that flows in the development device in an uncharged state in which the charger has not charged the photosensitive drum is equal to a charging development current that flows in the development device in a charged state in which the charger has charged the photosensitive drum.

公开(公告)号：US20210016564A1

公开(公告)日：2021-01-21

申请号：US16931065

申请日：2020-07-16

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshihiro YAMAGISHI ,  Kanako MORIMOTO ,  Ryota OKUI ,  Satoshi ISHII

IPC: B41J2/045

Abstract: An image forming apparatus includes a recording head, a controller, a first detector, and a second detector. The controller calculates a viscosity of ink in each of nozzles based on a temperature, a humidity, and an elapsed time. The controller determines, among the nozzles, a nozzle in which the viscosity is equal to or higher than a threshold to be a high-viscosity nozzle. The controller acquires non-ejection information indicating an ejection disabled nozzle that is disabled to eject the ink. The controller acquires a viscosity of the ink in the ejection disabled nozzle. The controller calculates an average value of viscosities of the ink in the plurality of nozzles. The controller compares the viscosity of the ink in the ejection disabled nozzle with the average value of the viscosities of the ink in the nozzles. The controller determines whether or not to change a contribution value based on a comparison result.