Fixing device and image forming apparatus

The fixing device achieves uniform temperature distribution by correctly positioning the heat equalizing member using a regulating member, addressing heat loss issues and maintaining thermal efficiency.

JP2025117345APending Publication Date: 2025-08-12KYOCERA DOCUMENT SOLUTIONS INC
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Patent Information

Application Number
JP2024012131
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-30
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

Existing fixing devices face challenges in uniformly distributing heat across the width of a fixing belt due to heat loss at bent portions of the heat equalizing member, requiring complex temperature adjustments and additional processing costs.

Method used

A fixing device with a rotatable endless fixing belt, a heater, a heat equalizing member, a holding member, a pressure member, and a regulating member that positions the heat equalizing member correctly in the width direction, ensuring consistent heat transfer without reducing thermal efficiency.

Benefits of technology

The solution maintains uniform temperature distribution across the fixing belt, preventing heat loss and ensuring efficient heat transfer from non-paper passing to paper passing regions, thereby enhancing fixing device performance.

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Abstract

To provide a fixing device that can properly locate a soaking member relative to a heater without reducing the thermal efficiency of the heater.SOLUTION: A fixing device comprises: a rotatable endless fixing belt 32; a heater 23 that has a belt contact surface in contact with an inner peripheral surface of the fixing belt 32; a soaking member 25 that is in contact with a surface of the heater 23 on the opposite side of the belt contact surface; a holding member 27 that holds the heater 23 and the soaking member 25; a pressure member 29 that is pressed by the heater 23 with the fixing belt 21 therebetween, and forms a pressure area with the fixing belt 21 for applying heat and pressure to a sheet to which a toner image is transferred; and a regulation member 51 that regulates the position of the soaking member 25 in a width direction of the sheet.SELECTED DRAWING: Figure 3
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Citation Information

Patent Citations

  • Fixation device

    JP2016114619A