JPS5614269A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS5614269A JPS5614269A JP9117079A JP9117079A JPS5614269A JP S5614269 A JPS5614269 A JP S5614269A JP 9117079 A JP9117079 A JP 9117079A JP 9117079 A JP9117079 A JP 9117079A JP S5614269 A JPS5614269 A JP S5614269A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- grids
- power source
- spacing
- polarity
- 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
Abstract
PURPOSE: To obtain a corona discharger which applies uniform electric charge suited for development by changing over the polarity of the bias voltage to be applied to grids so that the toner may be charged to the opposite polarity.
CONSTITUTION: A corona discharger 16 for toner charging is constituted by a width l1, a depth l2 and the spacing d1 between grids and a sleeve, the spacing d2 between the grids. A discharge electrode 17 comprises a gold plated tungsten wire or the like and the grids 18 likewise comprising gold plated tungsten wires or the like are provided in an arc shape by maintaining a spacing along the magnetic toner 15 on the sleeve surface. Further, an AC corona discharging power source 19, a grid bias power source 20 and a toner charging polarity change-over switch 21 are provided so that the positive and negative of the grid bias power source is changed over. Thereby, the stable charging of a fixed amount to the toner may be performed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9117079A JPS5614269A (en) | 1979-07-16 | 1979-07-16 | Developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9117079A JPS5614269A (en) | 1979-07-16 | 1979-07-16 | Developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5614269A true JPS5614269A (en) | 1981-02-12 |
Family
ID=14018988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9117079A Pending JPS5614269A (en) | 1979-07-16 | 1979-07-16 | Developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5614269A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6622000B2 (en) * | 2000-07-28 | 2003-09-16 | Sharp Kabushiki Kaisha | Developing apparatus having a charge amount control member |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5013053A (en) * | 1973-06-04 | 1975-02-10 | ||
JPS5015560A (en) * | 1973-06-08 | 1975-02-19 | ||
JPS5045639A (en) * | 1973-08-27 | 1975-04-23 | ||
JPS52146638A (en) * | 1976-05-31 | 1977-12-06 | Ricoh Co Ltd | Developing device for electrostatic image |
JPS5433033A (en) * | 1977-08-19 | 1979-03-10 | Ricoh Co Ltd | Developing method for electrostatic latent image |
-
1979
- 1979-07-16 JP JP9117079A patent/JPS5614269A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5013053A (en) * | 1973-06-04 | 1975-02-10 | ||
JPS5015560A (en) * | 1973-06-08 | 1975-02-19 | ||
JPS5045639A (en) * | 1973-08-27 | 1975-04-23 | ||
JPS52146638A (en) * | 1976-05-31 | 1977-12-06 | Ricoh Co Ltd | Developing device for electrostatic image |
JPS5433033A (en) * | 1977-08-19 | 1979-03-10 | Ricoh Co Ltd | Developing method for electrostatic latent image |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6622000B2 (en) * | 2000-07-28 | 2003-09-16 | Sharp Kabushiki Kaisha | Developing apparatus having a charge amount control member |
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