JPS54111355A - Residual quantity detector of toner - Google Patents
Residual quantity detector of tonerInfo
- Publication number
- JPS54111355A JPS54111355A JP1828778A JP1828778A JPS54111355A JP S54111355 A JPS54111355 A JP S54111355A JP 1828778 A JP1828778 A JP 1828778A JP 1828778 A JP1828778 A JP 1828778A JP S54111355 A JPS54111355 A JP S54111355A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- vessel
- bridge
- detection circuit
- inductance
- 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 always grasp the entire quantity of toner and readily perform alarm controlling by constituting an impedance bridge including the inductance element buried in a vessel and controlling the toner supply with its control circuit. CONSTITUTION:An impedance bridge formed with the inductance L of a coil 5 directly buried in the bottom of a toner vessel 4 and printed on a flexible sheet, resistances R1, R2, variable capacity C is formed and a power source 15 is connected to its two terminals and a detection circuit 11 to its other two terminals respectively. A frequency is applied to this bridge and the variable capacity C is so adjusted beforehand that the balance current of the bridge becomes 0. when magnetic toner is put in the vessel 4 in this state, the inductance L increases and therefore the balance of the bridge is broken and current flows in the detection circuit 11. By suitably selecting the diameter and number of windings of the coil 5, the approximate toner quantity in the vessel 4 may be grasped by the current values passing the detection circuit 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1828778A JPS54111355A (en) | 1978-02-20 | 1978-02-20 | Residual quantity detector of toner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1828778A JPS54111355A (en) | 1978-02-20 | 1978-02-20 | Residual quantity detector of toner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54111355A true JPS54111355A (en) | 1979-08-31 |
Family
ID=11967403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1828778A Pending JPS54111355A (en) | 1978-02-20 | 1978-02-20 | Residual quantity detector of toner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54111355A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100392994B1 (en) * | 2000-02-15 | 2003-07-31 | 캐논 가부시끼가이샤 | Process cartridge and image forming apparatus |
-
1978
- 1978-02-20 JP JP1828778A patent/JPS54111355A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100392994B1 (en) * | 2000-02-15 | 2003-07-31 | 캐논 가부시끼가이샤 | Process cartridge and image forming apparatus |
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