JPS5576371A - Failure detecting method in heat fixing device of electrophotographic copier - Google Patents
Failure detecting method in heat fixing device of electrophotographic copierInfo
- Publication number
- JPS5576371A JPS5576371A JP14920678A JP14920678A JPS5576371A JP S5576371 A JPS5576371 A JP S5576371A JP 14920678 A JP14920678 A JP 14920678A JP 14920678 A JP14920678 A JP 14920678A JP S5576371 A JPS5576371 A JP S5576371A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fixing device
- increment
- abnormality
- heater
- 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.)
- Granted
Links
Abstract
PURPOSE: To detect failure in fixing device in a short time, by detecting the heater temperature upon rise of heater, measuring the increment of temperature from the detected temperature, and detecting failure of heat fixing device from the abnormality in temperature increment.
CONSTITUTION: The temperature at the time of rise of heater H is detected by a temperature sensing element TH used in a temperature adjusting circuit TC, and the rate of increment of temperature within a specified time is measured. If this increment rate is less than the specified value, an abnormality is judged. That is, changes in the output of temperature sensing element TH, or the potential due to the temperature sensing element TH and resistance r1, or control current due to current control circuit 3 are properly corresponded with the changes in temperature, and the signal obtained by such correspondence is inputted into an interface I/O of a microcomputer MC through an A/D converter. By using this input signal, the increment rate of temperature is measured, and abnormality is judged. Thus, failure of fixing device may be detected in a short time before reaching a proper temperature.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14920678A JPS5576371A (en) | 1978-12-01 | 1978-12-01 | Failure detecting method in heat fixing device of electrophotographic copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14920678A JPS5576371A (en) | 1978-12-01 | 1978-12-01 | Failure detecting method in heat fixing device of electrophotographic copier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5576371A true JPS5576371A (en) | 1980-06-09 |
JPS629907B2 JPS629907B2 (en) | 1987-03-03 |
Family
ID=15470138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14920678A Granted JPS5576371A (en) | 1978-12-01 | 1978-12-01 | Failure detecting method in heat fixing device of electrophotographic copier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5576371A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5792364A (en) * | 1980-11-29 | 1982-06-08 | Mita Ind Co Ltd | Heater control circuit of heat fixing device |
JPS5792363A (en) * | 1980-11-29 | 1982-06-08 | Mita Ind Co Ltd | Heater control circuit of heat fixing device |
JPS57116352A (en) * | 1981-01-12 | 1982-07-20 | Ricoh Co Ltd | Controlling method for copying machine |
JPS6033579A (en) * | 1983-08-04 | 1985-02-20 | Ushio Inc | Toner fixing device |
JPS6055372A (en) * | 1983-09-06 | 1985-03-30 | Fuji Xerox Co Ltd | Fixing device of copying machine |
JPS61156079A (en) * | 1984-12-27 | 1986-07-15 | Minolta Camera Co Ltd | Temperature control device of heat fixing roller |
JPS6394279A (en) * | 1986-10-09 | 1988-04-25 | Fuji Xerox Co Ltd | Safety device for heating of heat roller |
JPS6410025A (en) * | 1987-06-30 | 1989-01-13 | Daikin Ind Ltd | Gasified oil burner |
JPH0194376A (en) * | 1987-10-07 | 1989-04-13 | Sharp Corp | Method for detecting abnormality of heat roller |
JPH01167527A (en) * | 1987-12-23 | 1989-07-03 | Matsushita Electric Ind Co Ltd | Safety device for combustion |
JPH02163787A (en) * | 1988-12-17 | 1990-06-25 | Canon Inc | Image thermal fixing device |
JPH03163483A (en) * | 1989-11-21 | 1991-07-15 | Canon Inc | Fixing device |
JPH05177686A (en) * | 1991-12-26 | 1993-07-20 | Nissei Plastics Ind Co | Controller for moding machine |
JP2013167679A (en) * | 2012-02-14 | 2013-08-29 | Brother Ind Ltd | Image forming apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115004856A (en) * | 2020-04-03 | 2022-09-02 | 理化工业株式会社 | Control device and abnormality detection method |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50106082A (en) * | 1973-07-25 | 1975-08-21 | ||
JPS50115496A (en) * | 1974-01-04 | 1975-09-10 | ||
JPS50155198A (en) * | 1974-06-03 | 1975-12-15 | ||
JPS5269636A (en) * | 1975-12-09 | 1977-06-09 | Ricoh Co Ltd | Circuit for detecting extraordinary temperature at fixing means |
JPS5275385A (en) * | 1975-12-19 | 1977-06-24 | Hitachi Ltd | Instantaneous temperature detector |
JPS5289331A (en) * | 1976-01-21 | 1977-07-26 | Fuji Xerox Co Ltd | Method of detecting abnormalty for fixing apparatus |
JPS52142471A (en) * | 1976-05-20 | 1977-11-28 | Rca Corp | Method of detecting resistance value of electron tube heater element |
JPS5481530A (en) * | 1977-12-09 | 1979-06-29 | Hitachi Ltd | Method and apparatus of safety check of heater |
-
1978
- 1978-12-01 JP JP14920678A patent/JPS5576371A/en active Granted
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50106082A (en) * | 1973-07-25 | 1975-08-21 | ||
JPS50115496A (en) * | 1974-01-04 | 1975-09-10 | ||
JPS50155198A (en) * | 1974-06-03 | 1975-12-15 | ||
JPS5269636A (en) * | 1975-12-09 | 1977-06-09 | Ricoh Co Ltd | Circuit for detecting extraordinary temperature at fixing means |
JPS5275385A (en) * | 1975-12-19 | 1977-06-24 | Hitachi Ltd | Instantaneous temperature detector |
JPS5289331A (en) * | 1976-01-21 | 1977-07-26 | Fuji Xerox Co Ltd | Method of detecting abnormalty for fixing apparatus |
JPS52142471A (en) * | 1976-05-20 | 1977-11-28 | Rca Corp | Method of detecting resistance value of electron tube heater element |
JPS5481530A (en) * | 1977-12-09 | 1979-06-29 | Hitachi Ltd | Method and apparatus of safety check of heater |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5792363A (en) * | 1980-11-29 | 1982-06-08 | Mita Ind Co Ltd | Heater control circuit of heat fixing device |
JPS5792364A (en) * | 1980-11-29 | 1982-06-08 | Mita Ind Co Ltd | Heater control circuit of heat fixing device |
JPS57116352A (en) * | 1981-01-12 | 1982-07-20 | Ricoh Co Ltd | Controlling method for copying machine |
JPH0415954B2 (en) * | 1983-08-04 | 1992-03-19 | Ushio Electric Inc | |
JPS6033579A (en) * | 1983-08-04 | 1985-02-20 | Ushio Inc | Toner fixing device |
JPS6055372A (en) * | 1983-09-06 | 1985-03-30 | Fuji Xerox Co Ltd | Fixing device of copying machine |
JPS61156079A (en) * | 1984-12-27 | 1986-07-15 | Minolta Camera Co Ltd | Temperature control device of heat fixing roller |
JPS6394279A (en) * | 1986-10-09 | 1988-04-25 | Fuji Xerox Co Ltd | Safety device for heating of heat roller |
JPS6410025A (en) * | 1987-06-30 | 1989-01-13 | Daikin Ind Ltd | Gasified oil burner |
JPH0194376A (en) * | 1987-10-07 | 1989-04-13 | Sharp Corp | Method for detecting abnormality of heat roller |
JPH01167527A (en) * | 1987-12-23 | 1989-07-03 | Matsushita Electric Ind Co Ltd | Safety device for combustion |
JPH02163787A (en) * | 1988-12-17 | 1990-06-25 | Canon Inc | Image thermal fixing device |
JPH03163483A (en) * | 1989-11-21 | 1991-07-15 | Canon Inc | Fixing device |
JPH05177686A (en) * | 1991-12-26 | 1993-07-20 | Nissei Plastics Ind Co | Controller for moding machine |
JP2013167679A (en) * | 2012-02-14 | 2013-08-29 | Brother Ind Ltd | Image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS629907B2 (en) | 1987-03-03 |
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