JPS5596967A - Developer laminar state detector - Google Patents
Developer laminar state detectorInfo
- Publication number
- JPS5596967A JPS5596967A JP517379A JP517379A JPS5596967A JP S5596967 A JPS5596967 A JP S5596967A JP 517379 A JP517379 A JP 517379A JP 517379 A JP517379 A JP 517379A JP S5596967 A JPS5596967 A JP S5596967A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- sleeve
- electrode
- laminar state
- developer
- 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.)
- Granted
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
PURPOSE:To accurately and surely detect developer laminar state by combining an electrode member, impedance element and plural comparators. CONSTITUTION:A toner laminar state detecting circuit 11 is constituted by a detecting resistance 12, an amplifier 13, the 1st, the 2nd threshold power sources 14, 16, 1st, 2nd comparators 15, 17 and the 1st, the 2nd display devices 18, 19, and is connected to the sleeve 3 of a developing device 2 by way of a switch SW2. Then, when switches SW1, SW2 are placed in the detecting position, the current from a power source 10 flows through an electrode 19, a toner layer 8, a sleeve 3 and a resistance 12 and fluctuates according to the contact state of a toner layer 8 and an electrode 9. When the toner layer 8 becomes thinner than the specified value, the signal from the 1st comparator 15 operates the 1st display device 18 and when the toner sticks on the sleeve 3, the signal from the 2nd comparator 17 operates the 2nd display device 19, thereby announcing toner deficiency and toner sticking respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP517379A JPS5596967A (en) | 1979-01-19 | 1979-01-19 | Developer laminar state detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP517379A JPS5596967A (en) | 1979-01-19 | 1979-01-19 | Developer laminar state detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5596967A true JPS5596967A (en) | 1980-07-23 |
JPS6337383B2 JPS6337383B2 (en) | 1988-07-25 |
Family
ID=11603839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP517379A Granted JPS5596967A (en) | 1979-01-19 | 1979-01-19 | Developer laminar state detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5596967A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57109965A (en) * | 1980-12-26 | 1982-07-08 | Toshiba Corp | Fur brush developing device |
JP2006300988A (en) * | 2005-04-15 | 2006-11-02 | Konica Minolta Business Technologies Inc | Image forming apparatus |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3527651A (en) * | 1966-10-20 | 1970-09-08 | Addressograph Multigraph | Method of and apparatus for developing electrostatic images |
JPS50122277A (en) * | 1974-02-28 | 1975-09-25 | ||
JPS53110845A (en) * | 1977-03-09 | 1978-09-27 | Ricoh Co Ltd | Detector of residual amount of toner |
-
1979
- 1979-01-19 JP JP517379A patent/JPS5596967A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3527651A (en) * | 1966-10-20 | 1970-09-08 | Addressograph Multigraph | Method of and apparatus for developing electrostatic images |
JPS50122277A (en) * | 1974-02-28 | 1975-09-25 | ||
JPS53110845A (en) * | 1977-03-09 | 1978-09-27 | Ricoh Co Ltd | Detector of residual amount of toner |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57109965A (en) * | 1980-12-26 | 1982-07-08 | Toshiba Corp | Fur brush developing device |
JPS6356990B2 (en) * | 1980-12-26 | 1988-11-09 | Tokyo Shibaura Electric Co | |
JP2006300988A (en) * | 2005-04-15 | 2006-11-02 | Konica Minolta Business Technologies Inc | Image forming apparatus |
JP4687212B2 (en) * | 2005-04-15 | 2011-05-25 | コニカミノルタビジネステクノロジーズ株式会社 | Image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6337383B2 (en) | 1988-07-25 |
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