公开(公告)号：US10990044B2

公开(公告)日：2021-04-27

申请号：US16885209

申请日：2020-05-27

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Yohei Doi ,  Eiji Shinohara ,  Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yuki Kawashima ,  Kiyotaka Murakami

IPC: G03G15/20

Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.

公开(公告)号：US10025238B2

公开(公告)日：2018-07-17

申请号：US15339287

申请日：2016-10-31

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Shuji Yokoyama ,  Yuki Kawashima

IPC: G03G15/20

Abstract: A fixing apparatus includes a belt including a ferromagnetic layer. A ferromagnetic plate is disposed inside the belt and has a Curie point that is lower than a Curie point of the ferromagnetic layer. An induction heater causes heat generation in the ferromagnetic layer and the ferromagnetic plate. The induction heater includes a coil. A driving circuit outputs a high frequency current to the coil, and changes the high frequency current. A temperature sensor measures a temperature of the coil. A controller controls the driving circuit to decrease the high frequency current if the temperature of the coil measured by the temperature sensor is higher than a predetermined value.

公开(公告)号：US09501014B2

公开(公告)日：2016-11-22

申请号：US14927207

申请日：2015-10-29

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Shuji Yokoyama ,  Yuki Kawashima

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2053 ,  G03G2215/2016

Abstract: A fixing apparatus includes a belt including a ferromagnetic layer, a roller facing the belt, a ferromagnetic plate disposed inside the belt and having a Curie point that is lower than a Curie point of the ferromagnetic layer, an induction heater configured to cause heat generation in the magnetic layer and the ferromagnetic plate, a driving circuit configured to output a high frequency current to the induction heater by switching on and off switching elements thereof, and a controller. The controller is configured to determine whether or not a temperature of the ferromagnetic plate is higher than the Curie point thereof, and control the driving circuit to reduce a level of the high frequency current when the temperature of the ferromagnetic plate is determined to be higher than the Curie point thereof.

Abstract translation: 定影装置包括：带状物，包括铁磁层，面向带的辊，配置在带内的铁磁板，具有低于铁磁层的居里点的居里点;感应加热器， 磁性层和铁磁板，驱动电路，被配置为通过接通和断开其开关元件而将高频电流输出到感应加热器，以及控制器。 所述控制器被配置为确定所述铁磁板的温度是否高于其居里点，并且当所述铁磁板的温度被确定为高于所述强磁性板的温度时，控制所述驱动电路以降低所述高频电流的电平 居里点。

公开(公告)号：US12124195B2

公开(公告)日：2024-10-22

申请号：US18453261

申请日：2023-08-21

Applicant: Toshiba Tec Kabushiki Kaisha

Inventor： Yohei Doi ,  Eiji Shinohara ,  Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yuki Kawashima ,  Kiyotaka Murakami

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2053 ,  G03G2215/2025

Abstract: An image processing apparatus includes a fixing unit including a belt, and a heater configured to heat the belt and including a substrate and a heating layer that is formed on the substrate, and a controller configured to shut off the heater if no current flows through the belt.

公开(公告)号：US11275330B2

公开(公告)日：2022-03-15

申请号：US17209103

申请日：2021-03-22

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Yohei Doi ,  Eiji Shinohara ,  Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yuki Kawashima ,  Kiyotaka Murakami

IPC: G03G15/20

Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.

公开(公告)号：US10481535B2

公开(公告)日：2019-11-19

申请号：US16151195

申请日：2018-10-03

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Yuki Kawashima

IPC: G03G15/20 ,  G03G9/087

Abstract: A fixing apparatus includes a fixing belt and an induced current generation section. The fixing belt includes a conductive layer. The induced current generation section faces the fixing belt. The induced current generation section includes a coil and a magnetic body. The coil generates a magnetic flux. The magnetic body faces the fixing belt across the coil. In the magnetic body, a part facing an end in a width direction of the fixing belt is set as a movable magnetic body capable of moving in a width direction.

公开(公告)号：US12055878B2

公开(公告)日：2024-08-06

申请号：US18308633

申请日：2023-04-27

Applicant: Toshiba Tec Kabushiki Kaisha

Inventor： Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kiyotaka Murakami ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yohei Doi ,  Yuki Kawashima ,  Eiji Shinohara

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064

Abstract: A heating device includes a rotatable film, a heater disposed inside the film and including a substrate that extends along a first direction and having two surfaces opposite to each other, and a heater element on one of the surfaces of the substrate, and a heat conductor including a first portion contacting the other surface of the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the other surface of the substrate. A width of the second portion is wider than the heater element in the second direction.

公开(公告)号：US11774887B2

公开(公告)日：2023-10-03

申请号：US17591560

申请日：2022-02-02

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Yohei Doi ,  Eiji Shinohara ,  Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yuki Kawashima ,  Kiyotaka Murakami

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2053 ,  G03G2215/2025

Abstract: An image processing apparatus includes a fixing unit including a fixing belt, and a heater configured to heat the fixing belt and including a substrate and a heating layer that is formed on the substrate, and a controller configured to, upon detecting an absence of a current flowing through the fixing belt, control the heater to not generate heat.

公开(公告)号：US11669033B2

公开(公告)日：2023-06-06

申请号：US17696786

申请日：2022-03-16

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kiyotaka Murakami ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yohei Doi ,  Yuki Kawashima ,  Eiji Shinohara

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064

Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction and having two surfaces opposite to each other, and a heater element on one of the surfaces of the substrate, and a heat conductor having first and second surfaces and including a first portion contacting the other surface of the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the other surface of the substrate. A thickness of the first portion of the heat conductor from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.

公开(公告)号：US11281132B2

公开(公告)日：2022-03-22

申请号：US16921861

申请日：2020-07-06

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Kiyotaka Murakami ,  Kazuhiko Kikuchi ,  Sasuke Endo ,  Masaya Tanaka ,  Ryota Saeki ,  Kousei Miyashita ,  Ryosuke Kojima ,  Yohei Doi ,  Yuki Kawashima ,  Eiji Shinohara

IPC: G03G15/20 ,  G03G15/00

Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.