Control apparatus for fixing unit having plural heaters
May 29, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesImage forming apparatus having a controlled fixing means Surface temperature control device for maintaining a constant temperature by control of current supply Color image forming apparatus having toner image forming device Image heating device capable of controlling activation of plural heaters Fixing device having a power supply control element for controlling a temperature of a heat member Fixing apparatus having a temperature control system for a plurality of heaters Patent #: 5819134 InventorsAssigneeApplicationNo. 865356 filed on 05/29/1997US Classes:347/156, Fixing or fusing219/216, Printing or reproduction device219/492, Comprising timing or cycling means347/102, Drying or curing347/212, Pre or post image recording treatment399/69, Temperature control399/330, Heated roller399/335By heatExaminersPrimary: Le, N.Assistant: Anderson, L. Attorney, Agent or FirmForeign Patent References
International ClassesB41J 002/385G03G 015/20 H05B 001/00 Foreign Application Priority Data1996-06-04 JPAbstractA heater of a fixing unit of a recording apparatus is constructed by a main heater and a sub heater. When the apparatus is in a standby mode, each heater is first turned off. When a temperature of the fixing unit is equal to or lower than a heating start temperature of the sub heater, the sub heater is turned on. After that, when the temperature of the fixing unit reaches a heating stop temperature of the sub heater, the sub heater is turned off. After that, when the temperature of the fixing unit is equal to or lower than the heating start temperature, the main heater is turned on. After that, when it reaches the heating stop temperature of the main heater, the main heater is turned off. The above operations are repeated. In the recording mode, the order of the on/off periods in a control unit time of each heater is switched every period and the temperature control is executed, thereby reducing a flickering.Other References
Field of SearchHaving feedback or environmental controlWith record receiver or handling means therefor With record receiver or handling means therefor Pre or post image recording treatment Drying or curing Pre or post treatment Fixing or fusing COMBINED WITH OTHER NON-RECORDING DEVICES Printing or reproduction device Comprising timing or cycling means Fixing (e.g., over-temperature protection) Temperature control Warmup or standby mode Fixing (e.g., fusing) Heated roller To fixing (e.g., fuser) By heat Electrostatic or electrolytic Internally heated roll | |
