JPS57186176A - Measuring device for quantity of toner charge - Google Patents
Measuring device for quantity of toner chargeInfo
- Publication number
- JPS57186176A JPS57186176A JP56071135A JP7113581A JPS57186176A JP S57186176 A JPS57186176 A JP S57186176A JP 56071135 A JP56071135 A JP 56071135A JP 7113581 A JP7113581 A JP 7113581A JP S57186176 A JPS57186176 A JP S57186176A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- toner
- magnet
- charge
- pressure gas
- 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
- Developing Agents For Electrophotography (AREA)
Abstract
PURPOSE: To measure the quantity of toner charge with high precision while preventing a developer from sticking to flank part of a magnet by a high- pressure gas flow, by using the magnet, which is fitted with a nonmagnetic materials, as a holding means for the developer.
CONSTITUTION: Nonmagnetic materials 11 are fitted on the external circumference of a magnet 10 which has a magnetic pole surface 10' slanting to a high- pressure gas flow and is rotatable around the magnetic pole surface 10', where a prescribed amount of a developer 5 containing toner 4 and a carrier is stuck in the shape of a magnetic brush. A nozzle 3 blows high-pressure gas to the developer 5 from above the magnetic pole surface 10' thereby scattering the toner 4. After a capacitor 7 is discharged with a switch 1 before charge measurement, the quantity of the charge of the toner 4 is measured by the capacitor 7 and an electrometer 8 connected to the magnet 10. Consequently, no developer sticks on the reverse surfaces of the nonmagnetic materials and the toner is all scattered separately from the carrier, thus measuring the accurate quantity of charge.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56071135A JPS57186176A (en) | 1981-05-12 | 1981-05-12 | Measuring device for quantity of toner charge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56071135A JPS57186176A (en) | 1981-05-12 | 1981-05-12 | Measuring device for quantity of toner charge |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57186176A true JPS57186176A (en) | 1982-11-16 |
JPS616347B2 JPS616347B2 (en) | 1986-02-25 |
Family
ID=13451827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56071135A Granted JPS57186176A (en) | 1981-05-12 | 1981-05-12 | Measuring device for quantity of toner charge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57186176A (en) |
-
1981
- 1981-05-12 JP JP56071135A patent/JPS57186176A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS616347B2 (en) | 1986-02-25 |
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