Fixing device and image forming apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorKen Iguchi
Life of this patent
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Abstract
According to an embodiment, a fixing unit includes a heater, a fixing member, a press roller, a sensor, a processor, and a memory. The fixing member is heated by heat generated by the heater. The press roller forms a nip portion through which a medium having a fixing target material transferred thereto passes, between the press roller and the fixing member. The sensor measures a temperature of the fixing member. The processor controls the temperature of the fixing member so as to be a target value by acquiring the temperature detected by the sensor in a first period, and also acquires the temperature detected by the sensor in a second period shorter than the first period. The memory records the temperature acquired in the second period.
Claims20
A fixing unit comprising:
- a heater that generates heat;
- a fixing member that is heated by the heat generated by the heater;
- a press roller that forms between the press roller and the fixing member a nip portion through which a medium having a fixing target material transferred thereto passes;
- a sensor that measures a temperature of the fixing member;
- a processor that acquires the temperature detected by the sensor in a first time period, controls the temperature of the fixing member so as to be a target value, and acquires the temperature detected by the sensor in a second time period shorter than the first time period;
- and
- a memory that records the temperature acquired in the second time period.
An image forming apparatus comprising:
- an image forming unit configured to form an image by using an image forming material;
- a heater that generates heat;
- a fixing member that is heated by the heat generated by the heater;
- a press roller that forms between the press roller and the fixing member a nip portion through which a medium having a transferred image formed of the image forming material passes;
- a sensor that measures a temperature of the fixing member;
- a processor that controls the temperature of the fixing member so as to be a target value by acquiring the temperature detected by the sensor in a first time period, and also acquires the temperature detected by the sensor in a second time period shorter than the first time period;
- and
- a memory that records the temperature acquired in the second time period.
A fixing method comprising:
- generating heat to heat a fixing member;
- a press roller that forms between the press roller and the fixing member a nip portion through which a medium having a fixing target material transferred thereto passes;
- measuring a temperature of the fixing member;
- acquiring the temperature measured in a first time period;
- controlling the temperature of the fixing member so as to be a target value;
- and
- acquiring the temperature measured in a second time period shorter than the first time period;
- and
- recording the temperature acquired in the second time period.
Dependencies are inferred from the claim text.