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EP0693716A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Fixing device

Assignee: Canon Inc
•
Filing: 1995-07-20
•
Granted: —
•
Expires: 2015-07-20
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Abstract

Abstract A fixing device comprises a first heater, a second heater having a heat distribution different from that of said first heater, a heating member heated by said first and second heaters, a temperature detecting element for detecting the temperature of said heating member, and power supply control means for controlling the power supply to said first heater and second heater in such a manner that the temperature detected by said temperature detecting element is maintained at a target temperature. After a fixing operation and until the temperature detected by said temperature detecting element rises from the fixing temperature to a stand-by temperature higher than said fixing temperature, said power supply means is adapted to effect power supply control different from that in the stand-by state.

Inventors

  • 👤 Yuichiro C/O Canon K.K. Toyohara
  • 👤 Tsuyoshi C/O Canon K.K. Kunishi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 06:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/2042

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 126 words
A fixing device comprising: a first heater; a second heater having a heat distribution different from that of said first heater; a heating member heated by said first and second heaters; a temperature detecting element for detecting the temperature of said heating member; and power supply control means for controlling the power supply to said first heater and second heater in such a manner that the temperature detected by said temperature detecting element is maintained at a target temperature; wherein, after a fixing operation and until the temperature detected by said temperature detecting element rises from the fixing temperature to a stand-by temperature higher than said fixing temperature, said power supply means is adapted to effect power supply control different from that in the stand-by state.
Claim 2
Dependent Claim 43 words
A fixing device according to claim 1, wherein said first heater generates a larger amount of heat in the central portion in the longitudinal direction of said heating member, and said second heater generates a larger amount of heat in the end portions.
Claim 3
Dependent Claim 22 words
A fixing device according to claim 2, wherein said temperature detecting element is provided in the central area of said heating member.
Claim 4
Dependent Claim 54 words
A fixing device according to claim 1, wherein, after a fixing operation and until the temperature detected by said temperature detecting element rises from the fixing temperature to the stand-by temperature, said power supply control means is adapted to select a higher power supply ratio to said first heater than in the stand-by state.
Claim 5
Dependent Claim 68 words
A fixing device according to claim 1, wherein, after a fixing operation and until the temperature detected by said temperature detecting element rises from the fixing temperature to the stand-by temperature, said power supply control means is adapted to set the target temperature at a value higher than the fixing temperature but lower than the stand-by temperature, and then to set the target temperature at the stand-by temperature.

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