JPS55164837A - Copying apparatus - Google Patents
Copying apparatusInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4862472A (en) * | 1971-12-02 | 1973-08-31 | ||
JPS5062644A (en) * | 1973-10-01 | 1975-05-28 |
-
1979
- 1979-06-08 JP JP7261579A patent/JPS55164837A/en active Pending
Patent Citations (2)
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)
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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