JPS5640874A - Fixing unit using radiant light source - Google Patents
Fixing unit using radiant light sourceInfo
- Publication number
- JPS5640874A JPS5640874A JP11645979A JP11645979A JPS5640874A JP S5640874 A JPS5640874 A JP S5640874A JP 11645979 A JP11645979 A JP 11645979A JP 11645979 A JP11645979 A JP 11645979A JP S5640874 A JPS5640874 A JP S5640874A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- supply voltage
- time
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Control Of Temperature (AREA)
Abstract
PURPOSE: To maintain the fixing temperature at nearly a fixed level regardless of fluctuation of the power supply voltage, by giving a control to the time of conduction each time to the high- luminance radiant light source in accordance with the voltage fluctuation of the AC power source.
CONSTITUTION: When the DC voltage corresponding to the voltage of the AC power source A emerges at the capacitor 4c of the voltage compensating circuit 4, the output of the operational amplifier 4d produces the voltage having a level which reversely corresponds to the power supply voltage. As a result, the IC element 4f generates the pulse having a duration which is adversely proportional to the power supply voltage. The element 4f incorporates a unified structure of the integral network which produces the saw-tooth type wave according to the feed of the recording paper by a fixed length after receiving the supply of the recording paper feed synchronous pulse via the inverter 4c plus the comparator which detects the coincidence between the voltage of the saw-tooth type wave and the output voltage of the amplifier 4d. With this pulse, the 2-way thyristor 2 is triggered via the gate control circuit 5 and the zero-phase detecting circuit 3, and thus the time of conduction is controlled each time in accordance with the power supply voltage for the halogen lamp 1 which forms the high radiant light source. Accordingly, the fixing temperature can be maintained nearly at a fixed level for the fixing unit and regardless of fluctuation of the power supply voltage.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11645979A JPS5640874A (en) | 1979-09-11 | 1979-09-11 | Fixing unit using radiant light source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11645979A JPS5640874A (en) | 1979-09-11 | 1979-09-11 | Fixing unit using radiant light source |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5640874A true JPS5640874A (en) | 1981-04-17 |
Family
ID=14687632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11645979A Pending JPS5640874A (en) | 1979-09-11 | 1979-09-11 | Fixing unit using radiant light source |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5640874A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6033580A (en) * | 1983-08-04 | 1985-02-20 | Katsuragawa Denki Kk | Temperature controller of heat fixing device of electrophotographic copying machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5339136A (en) * | 1976-09-22 | 1978-04-10 | Ricoh Co Ltd | Fixing temperature controlling method |
JPS53139542A (en) * | 1977-05-11 | 1978-12-05 | Mitsubishi Electric Corp | Intermittent fixation method |
JPS5494135A (en) * | 1978-01-06 | 1979-07-25 | Copyer Co Ltd | Heating control |
-
1979
- 1979-09-11 JP JP11645979A patent/JPS5640874A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5339136A (en) * | 1976-09-22 | 1978-04-10 | Ricoh Co Ltd | Fixing temperature controlling method |
JPS53139542A (en) * | 1977-05-11 | 1978-12-05 | Mitsubishi Electric Corp | Intermittent fixation method |
JPS5494135A (en) * | 1978-01-06 | 1979-07-25 | Copyer Co Ltd | Heating control |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6033580A (en) * | 1983-08-04 | 1985-02-20 | Katsuragawa Denki Kk | Temperature controller of heat fixing device of electrophotographic copying machine |
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