JPS55164867A - Temperature control unit - Google Patents
Temperature control unitInfo
- Publication number
- JPS55164867A JPS55164867A JP7261779A JP7261779A JPS55164867A JP S55164867 A JPS55164867 A JP S55164867A JP 7261779 A JP7261779 A JP 7261779A JP 7261779 A JP7261779 A JP 7261779A JP S55164867 A JPS55164867 A JP S55164867A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- time
- disconnection
- turned
- disconnection detection
- 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
Landscapes
- Control Of Temperature (AREA)
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To rapidly detect the disconnection of a thermistor, if it occurs, and prevent the excessive rise of temperature by changing the fixed time for the purpose of delaying the disconnection detection of the temperature detecting element according to the standing time from the time when the heating of the member to be heated is stopped.
CONSTITUTION: When an electric power source switch is turned on again after it has been turned off to stop current supply to a heater H21 during temperature controlling, the roller has not yet lowered from the specified temperature and therefore it is sometimes heated further and raise its temperature irrespective of disconnection during the disconnection detection inhibit time by a timer. However, if the switch is turned on again by the electric discharge resistances (R21, R23, R22) of a capacitor C21, the charge is remained in the capacitor C21. Hence, the inhibit time of the disconnection detection becomes short and in case a thermistor TH21 has disconnected, it may be detected rapidly and the excessive rise of temperature may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7261779A JPS55164867A (en) | 1979-06-08 | 1979-06-08 | Temperature control unit |
DE3018859A DE3018859C3 (en) | 1979-05-17 | 1980-05-16 | Electrostatic imaging device |
GB8016280A GB2051677B (en) | 1979-05-17 | 1980-05-16 | Image formation apparatus |
GB08227945A GB2123343B (en) | 1979-05-17 | 1982-09-30 | Image formation apparatus |
US06/626,486 US4538902A (en) | 1979-05-17 | 1984-07-03 | Image formation apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7261779A JPS55164867A (en) | 1979-06-08 | 1979-06-08 | Temperature control unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55164867A true JPS55164867A (en) | 1980-12-22 |
JPS6330630B2 JPS6330630B2 (en) | 1988-06-20 |
Family
ID=13494515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7261779A Granted JPS55164867A (en) | 1979-05-17 | 1979-06-08 | Temperature control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55164867A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5750713U (en) * | 1980-09-10 | 1982-03-23 | ||
JPS6184919U (en) * | 1984-11-08 | 1986-06-04 | ||
JPS6242177A (en) * | 1985-08-20 | 1987-02-24 | Fujitsu Ltd | Prevention system for overheating of heater |
JPH0619011U (en) * | 1992-08-11 | 1994-03-11 | 株式会社日立ホームテック | Temperature control circuit |
JP2014139638A (en) * | 2013-01-21 | 2014-07-31 | Kyocera Document Solutions Inc | Image forming apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01178227U (en) * | 1988-06-03 | 1989-12-20 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4850736A (en) * | 1971-10-18 | 1973-07-17 | ||
JPS4862472A (en) * | 1971-12-02 | 1973-08-31 | ||
JPS491234A (en) * | 1972-04-15 | 1974-01-08 | ||
JPS4982728U (en) * | 1972-11-06 | 1974-07-17 | ||
JPS5212833A (en) * | 1975-07-21 | 1977-01-31 | Canon Inc | Jam detection device |
JPS5254045U (en) * | 1975-10-17 | 1977-04-18 | ||
JPS5269636A (en) * | 1975-12-09 | 1977-06-09 | Ricoh Co Ltd | Circuit for detecting extraordinary temperature at fixing means |
JPS53107844A (en) * | 1977-03-02 | 1978-09-20 | Canon Inc | Picture image forming device |
JPS53107873A (en) * | 1977-03-02 | 1978-09-20 | Rhythm Watch Co | Display power source circuit for timepiece |
-
1979
- 1979-06-08 JP JP7261779A patent/JPS55164867A/en active Granted
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4850736A (en) * | 1971-10-18 | 1973-07-17 | ||
JPS4862472A (en) * | 1971-12-02 | 1973-08-31 | ||
JPS491234A (en) * | 1972-04-15 | 1974-01-08 | ||
JPS4982728U (en) * | 1972-11-06 | 1974-07-17 | ||
JPS5212833A (en) * | 1975-07-21 | 1977-01-31 | Canon Inc | Jam detection device |
JPS5254045U (en) * | 1975-10-17 | 1977-04-18 | ||
JPS5269636A (en) * | 1975-12-09 | 1977-06-09 | Ricoh Co Ltd | Circuit for detecting extraordinary temperature at fixing means |
JPS53107844A (en) * | 1977-03-02 | 1978-09-20 | Canon Inc | Picture image forming device |
JPS53107873A (en) * | 1977-03-02 | 1978-09-20 | Rhythm Watch Co | Display power source circuit for timepiece |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5750713U (en) * | 1980-09-10 | 1982-03-23 | ||
JPS6184919U (en) * | 1984-11-08 | 1986-06-04 | ||
JPS6242177A (en) * | 1985-08-20 | 1987-02-24 | Fujitsu Ltd | Prevention system for overheating of heater |
JPH0558544B2 (en) * | 1985-08-20 | 1993-08-26 | Fujitsu Ltd | |
JPH0619011U (en) * | 1992-08-11 | 1994-03-11 | 株式会社日立ホームテック | Temperature control circuit |
JP2014139638A (en) * | 2013-01-21 | 2014-07-31 | Kyocera Document Solutions Inc | Image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6330630B2 (en) | 1988-06-20 |
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