JPS5448250A - Detecting mechanism of remaining quantity of toner of magnedry developing device - Google Patents
Detecting mechanism of remaining quantity of toner of magnedry developing deviceInfo
- Publication number
- JPS5448250A JPS5448250A JP11392277A JP11392277A JPS5448250A JP S5448250 A JPS5448250 A JP S5448250A JP 11392277 A JP11392277 A JP 11392277A JP 11392277 A JP11392277 A JP 11392277A JP S5448250 A JPS5448250 A JP S5448250A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- tank
- buzzer
- developing device
- electrodes
- 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
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To automatically detect the remaining quantity of toner by providing a pair of opposing electrodes within a toner tank and detecting the current flowing between the electrodes. CONSTITUTION:Partition plates 3, 4 are mounted between side plates 1, 2 and a magnetic brush 6 is disposed in the lower part thereof, by which the toner tank 17 of the developing device is formed. Insulation blocks 11, 12 are further provided to the toner tank 17 of this construction and electrode plates 13, 14 are bridged between the insulation blocks and are so mounted that the face portions mutually oppose and become perpendicular. The electrodes are connected electrically to a current detection circuit 19, buzzer driving circuit 20, buzzer 21. Hence, the quantity of the toner 18 in the tank is detected by the current flowing in the abovementioned circuits and is alarmed by the buzzer, whereby troubles occuring in the shortage of toner may be automatically prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11392277A JPS5448250A (en) | 1977-09-24 | 1977-09-24 | Detecting mechanism of remaining quantity of toner of magnedry developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11392277A JPS5448250A (en) | 1977-09-24 | 1977-09-24 | Detecting mechanism of remaining quantity of toner of magnedry developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5448250A true JPS5448250A (en) | 1979-04-16 |
Family
ID=14624543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11392277A Pending JPS5448250A (en) | 1977-09-24 | 1977-09-24 | Detecting mechanism of remaining quantity of toner of magnedry developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5448250A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57154268A (en) * | 1981-03-19 | 1982-09-24 | Oki Electric Ind Co Ltd | Detector for remaining amount of developer |
| JPS5831554U (en) * | 1981-08-26 | 1983-03-01 | キヤノン株式会社 | Toner remaining amount detection device |
| JP2012230229A (en) * | 2011-04-26 | 2012-11-22 | Canon Inc | Image forming apparatus |
| US9317005B2 (en) | 2011-04-26 | 2016-04-19 | Canon Kabushiki Kaisha | Image forming apparatus for determining remaining amount of developer in developer container |
-
1977
- 1977-09-24 JP JP11392277A patent/JPS5448250A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57154268A (en) * | 1981-03-19 | 1982-09-24 | Oki Electric Ind Co Ltd | Detector for remaining amount of developer |
| JPS5831554U (en) * | 1981-08-26 | 1983-03-01 | キヤノン株式会社 | Toner remaining amount detection device |
| JPH028299Y2 (en) * | 1981-08-26 | 1990-02-27 | ||
| JP2012230229A (en) * | 2011-04-26 | 2012-11-22 | Canon Inc | Image forming apparatus |
| US9317005B2 (en) | 2011-04-26 | 2016-04-19 | Canon Kabushiki Kaisha | Image forming apparatus for determining remaining amount of developer in developer container |
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