Fixing apparatus with coil and movable magnetic body and image forming apparatus with coil and movable magnetic body
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorYuki Kawashima
Life of this patent
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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.
Claims18
A fixing apparatus, comprising:
- a fixing belt including a conductive layer;
- an induced current generation section facing the fixing belt, comprising
- a coil configured to generate a magnetic flux, and
- a magnetic body facing the fixing belt across the coil,
- a magnetic body moving controller configured to control movement of a movable magnetic body, and
- a temperature sensor configured to detect a temperature of an end portion in a width direction of the fixing belt,
- wherein a part of the magnetic body facing the end portion the width direction of the fixing belt is set as the movable magnetic body, which is capable of moving in the width direction, and
- wherein the magnetic body moving controller is configured to move the movable magnetic body responsive to detected temperature information from the temperature sensor.
An image forming apparatus, comprising:
- an image forming section configured to form an image on a sheet;
- a fixing apparatus to fix the image on the sheet, the fixing apparatus comprising
- a fixing belt including a conductive layer;
- and
- an induced current generation section facing the fixing belt, the induced current generation section including a coil configured to generate a magnetic flux and a magnetic body facing the fixing belt across the coil,
- a magnetic body moving controller configured to control movement of a movable magnetic body, and
- a temperature sensor configured to detect a temperature of an end portion in a width direction of the fixing belt,
- wherein a part of the magnetic body facing the end portion in the width direction of the fixing belt is set as the movable magnetic body, which is configured to move in the width direction, and
- wherein the magnetic body moving controller is configured to move the movable magnetic body responsive to detected temperature information from the temperature sensor.
A fixing method, comprising:
- arranging a fixing belt having a conductive layer so as to face an induced current generation section of a fixing apparatus;
- generating a magnetic flux using a coil provided in the induced current generation section;
- disposing a magnetic body so as to face the fixing belt across from the coil;
- positioning at least a portion of the magnetic body so as to face an end portion of the fixing belt in a width direction,
- causing at least the portion of the magnetic body to move in the width direction, such that at least the portion of the magnetic body facing the end portion in the width direction of the fixing belt is a movable magnetic body,
- controlling movement of the movable magnetic body,
- detecting, by a temperature sensor, a temperature of the end portion in the width direction of the fixing belt, and
- moving the movable magnetic body responsive to detected temperature information from the temperature sensor.
Dependencies are inferred from the claim text.