JPS55164837A - Copying apparatus - Google Patents

Copying apparatus

Info

Publication number
JPS55164837A
JPS55164837A JP7261579A JP7261579A JPS55164837A JP S55164837 A JPS55164837 A JP S55164837A JP 7261579 A JP7261579 A JP 7261579A JP 7261579 A JP7261579 A JP 7261579A JP S55164837 A JPS55164837 A JP S55164837A
Authority
JP
Japan
Prior art keywords
disconnection
transistor
output
level
becomes
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
JP7261579A
Other languages
Japanese (ja)
Inventor
Tsuneki Inutsuka
Yoshitaka Kawamo
Masahito Ishida
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP7261579A priority Critical patent/JPS55164837A/en
Publication of JPS55164837A publication Critical patent/JPS55164837A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Or Security For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Fixing For Electrophotography (AREA)
  • Paper Feeding For Electrophotography (AREA)

Abstract

PURPOSE: To prevent damage of a copier member, by carrying on a process in the case of the disconnection of a temperature detector when the disconnection is detected during continuous copying operation, and preventing restart of the process after the completion.
CONSTITUTION: Capacitor C21 is charged and exceeds a voltage set with resistance R21 and R22, at that time operation amplifier Q21 reaches level "L" in output, and transistor Q22 becomes nonconducting, accordingly, operation amplifier Q24, when thermistor TH21 is disconnected on supplying power, becomes level "H" in output, transistor Q25 becomes conducting, Q29 nonconducting, and interrupts power to heater H21. The output of amplifier Q24 for detecting the disconnection is transmitted to transistor Q25 after a timer consisting of resistance 23 and capacitor 21 has been up, thus permitting signal WAIT to be kept in level "L" by properly selecting the timer constant and copying restart after that to be hindered, consequently, damage of the copier member to be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP7261579A 1979-06-08 1979-06-08 Copying apparatus Pending JPS55164837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7261579A JPS55164837A (en) 1979-06-08 1979-06-08 Copying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7261579A JPS55164837A (en) 1979-06-08 1979-06-08 Copying apparatus

Publications (1)

Publication Number Publication Date
JPS55164837A true JPS55164837A (en) 1980-12-22

Family

ID=13494459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7261579A Pending JPS55164837A (en) 1979-06-08 1979-06-08 Copying apparatus

Country Status (1)

Country Link
JP (1) JPS55164837A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01156786A (en) * 1987-12-15 1989-06-20 Matsushita Electric Ind Co Ltd Heat fixing device
JPH0792745A (en) * 1993-09-27 1995-04-07 Canon Inc Method for temporarily stopping copying action of double-side copying device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4862472A (en) * 1971-12-02 1973-08-31
JPS5062644A (en) * 1973-10-01 1975-05-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4862472A (en) * 1971-12-02 1973-08-31
JPS5062644A (en) * 1973-10-01 1975-05-28

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01156786A (en) * 1987-12-15 1989-06-20 Matsushita Electric Ind Co Ltd Heat fixing device
JPH0792745A (en) * 1993-09-27 1995-04-07 Canon Inc Method for temporarily stopping copying action of double-side copying device

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