Fuser and heatfusing control method
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsToshihiro Sone, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda
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Abstract
According to a mode of the present invention, there is disclosed a fixing apparatus comprising a non-contact temperature detection section which detects a temperature by infrared rays radiated from a heating member, to made uniform a surface temperature of the heating member in an axial direction and a rotation direction based on first temperature information for detecting a temperature difference of the axial direction of the heating member and second temperature information for detecting the temperature difference of the rotation direction of the heating member.
Claims21
(canceled)
A fixing apparatus comprising:
- a heating roller which includes a conductive member;
- a coil which is placed near the heating roller;
- an excitation circuit which includes the coil;
- a first control circuit which transmits a driving signal to the excitation circuit;
- a plurality of temperature sensors which detects temperatures at two parts of the heating roller in a rotation direction thereof;
- and
- a second control circuit which compares outputs of the plurality of temperature sensors,
- wherein the second control circuit changes a control signal to be transmitted to the first control circuit in accordance with an output difference between the temperature sensors.
A fixing apparatus comprising:
- a heating means for heating toner on a media;
- an induction heating means for supplying a high-frequency magnetic field to the heating means;
- a first control means for controlling the induction heating means;
- a plurality of temperature detection means for detecting temperatures at two parts of the heating means in a rotation direction thereof;
- and
- a second control means for comparing outputs of the plurality of temperature detection means,
- wherein the second control means changes a control signal to be transmitted to the first control means in accordance with an output difference between the temperature detection means.
A heatfusing control method comprising:
- rotating a heating roller;
- supplying a high-frequency current to a coil placed near the heating roller;
- detecting temperatures at each of the upstream and downstream parts of the heating roller in a rotation direction thereof;
- calculating a temperature difference between the two parts;
- and
- changing the amount of high-frequency current to be supplied to the coil in accordance with the temperature difference.
Dependencies are inferred from the claim text.