JPS5792364A - Heater control circuit of heat fixing device - Google Patents

Heater control circuit of heat fixing device

Info

Publication number
JPS5792364A
JPS5792364A JP16839980A JP16839980A JPS5792364A JP S5792364 A JPS5792364 A JP S5792364A JP 16839980 A JP16839980 A JP 16839980A JP 16839980 A JP16839980 A JP 16839980A JP S5792364 A JPS5792364 A JP S5792364A
Authority
JP
Japan
Prior art keywords
output
heater
gate
level
detecting element
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
Application number
JP16839980A
Other languages
Japanese (ja)
Inventor
Yoshihiro Kawahara
Junichi Hirobe
Tsugio Nakanishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Priority to JP16839980A priority Critical patent/JPS5792364A/en
Publication of JPS5792364A publication Critical patent/JPS5792364A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To prevent a heat roller from overheating when a temprature detecting element is abnormal by discriminating the level of the output of a temperature detecting element and by turning off a switching element when the output of the temperature detecting element is below a reference level a constant short time after a power source is put to work. CONSTITUTION:When the output of an AND gate 62 has a high level, a transistor 76 turns on. As a result, light emission diodes 77 and 78 turn on. Light beams from the diodes 77 and 78 reach the gates of thyristors 79 and 80 to turn on a triac as a semiconductor switching element 61 connected in series to a heater 7, thereby feeding AC power source to the heater 7. Therefore, when the output of the AND gate 62 has the high level, the heater 7 is still fed with the electric power and when the output of the AND gate 62 has a low level, the feeding to the heater 7 is cut off.
JP16839980A 1980-11-29 1980-11-29 Heater control circuit of heat fixing device Pending JPS5792364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16839980A JPS5792364A (en) 1980-11-29 1980-11-29 Heater control circuit of heat fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16839980A JPS5792364A (en) 1980-11-29 1980-11-29 Heater control circuit of heat fixing device

Publications (1)

Publication Number Publication Date
JPS5792364A true JPS5792364A (en) 1982-06-08

Family

ID=15867389

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16839980A Pending JPS5792364A (en) 1980-11-29 1980-11-29 Heater control circuit of heat fixing device

Country Status (1)

Country Link
JP (1) JPS5792364A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014092666A (en) * 2012-11-02 2014-05-19 Fuji Xerox Co Ltd Image forming apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51131259A (en) * 1975-05-10 1976-11-15 Omron Tateisi Electronics Co Zero cross trigger circuit
JPS5269636A (en) * 1975-12-09 1977-06-09 Ricoh Co Ltd Circuit for detecting extraordinary temperature at fixing means
JPS5441142A (en) * 1977-09-07 1979-04-02 Canon Inc Heating safety device of contact heating type roller fixing device
JPS5576371A (en) * 1978-12-01 1980-06-09 Minolta Camera Co Ltd Failure detecting method in heat fixing device of electrophotographic copier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51131259A (en) * 1975-05-10 1976-11-15 Omron Tateisi Electronics Co Zero cross trigger circuit
JPS5269636A (en) * 1975-12-09 1977-06-09 Ricoh Co Ltd Circuit for detecting extraordinary temperature at fixing means
JPS5441142A (en) * 1977-09-07 1979-04-02 Canon Inc Heating safety device of contact heating type roller fixing device
JPS5576371A (en) * 1978-12-01 1980-06-09 Minolta Camera Co Ltd Failure detecting method in heat fixing device of electrophotographic copier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014092666A (en) * 2012-11-02 2014-05-19 Fuji Xerox Co Ltd Image forming apparatus
US9304453B2 (en) 2012-11-02 2016-04-05 Fuji Xerox Co., Ltd. Image forming apparatus

Similar Documents

Publication Publication Date Title
RU94030498A (en) Device to improve current output of battery at low ambient temperatures
ES8202656A1 (en) Solar powered automatic turn-on control unit.
SE8203601L (en) POWER CONTROLLER, IN PARTICULAR A LIGHT CONTROLLER
KR870008488A (en) Inrush current limiting device
SE8306967L (en) POWER SUPPLY DEVICE FOR AN AC POWER CONSUMER
JPS5792364A (en) Heater control circuit of heat fixing device
JPS57192129A (en) Semiconductor relay
ES544426A0 (en) PROTECTION CIRCUIT OF AN ELECTRIC MOTOR
JPS5792363A (en) Heater control circuit of heat fixing device
JPS5767971A (en) Preventing device for abnormal rise of temperature of heat generator
JPS5671115A (en) Temperature control device
JPS57202698A (en) Electrical current supply device for x-ray emitting filament
GB1485786A (en) Device for adjusting the power supplied to a load from a rectified alternating voltage source by suppressing half cycles
JPS5530237A (en) Gate driver for gate turn-off thyristor
JPS5762630A (en) Control circuit device
JPS57208872A (en) Protective device for high-frequency inverter
JPS55144779A (en) Control power supply device for thyristor
JPS54144892A (en) Drive circuit for light emitting semiconductor element
JPS55136718A (en) Solidstate relay
JPS5720818A (en) Exothermic temperature control device of resistance heating element
JPS5669908A (en) Field effect transistor circuit with protecting circuit
JPS5624614A (en) Safety device of temperature control device
JPS5775329A (en) Automatic switching circuit of power supply
JPS57127214A (en) Temperature controlling device
JPS54134282A (en) Temperature control device