JPS5670468A - Measuring device for volume of electric charge of toner - Google Patents
Measuring device for volume of electric charge of tonerInfo
- Publication number
- JPS5670468A JPS5670468A JP14745679A JP14745679A JPS5670468A JP S5670468 A JPS5670468 A JP S5670468A JP 14745679 A JP14745679 A JP 14745679A JP 14745679 A JP14745679 A JP 14745679A JP S5670468 A JPS5670468 A JP S5670468A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- volume
- electric charge
- blowing
- conditions
- 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
- Developing Agents For Electrophotography (AREA)
Abstract
PURPOSE: To measure the volume of electric charge accurately irrespective of conditions of blowing-off by retaining a developer magnetically and removing the toner by a high-pressure gas stream.
CONSTITUTION: When the high-pressure gas stream is blown from a nozzle 4 against the developer 6 attracted and attached to a magnet 7, the toner 3 whose adhesive force by the electrostatic power is weal is removed irrespective of the conditions of blowing-off and only a carrier remains. By this, the volume of the electric charge generated in the carrier is measured through the intermediary of a capacitor C or the like and thus the accurate measurement of the volume of the electric charge of the toner irrespective of the blowing-off conditions can be performed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14745679A JPS5670468A (en) | 1979-11-14 | 1979-11-14 | Measuring device for volume of electric charge of toner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14745679A JPS5670468A (en) | 1979-11-14 | 1979-11-14 | Measuring device for volume of electric charge of toner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5670468A true JPS5670468A (en) | 1981-06-12 |
Family
ID=15430762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14745679A Pending JPS5670468A (en) | 1979-11-14 | 1979-11-14 | Measuring device for volume of electric charge of toner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5670468A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS608758A (en) * | 1983-06-29 | 1985-01-17 | Konishiroku Photo Ind Co Ltd | Measuring device of electric charge distribution of toner particle |
US5237371A (en) * | 1988-09-20 | 1993-08-17 | Hitachi, Ltd. | Developing apparatus having charger for controlling charge on developer |
JP2011185771A (en) * | 2010-03-09 | 2011-09-22 | U-Tec Corp | Powder charge quantity measuring device |
-
1979
- 1979-11-14 JP JP14745679A patent/JPS5670468A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS608758A (en) * | 1983-06-29 | 1985-01-17 | Konishiroku Photo Ind Co Ltd | Measuring device of electric charge distribution of toner particle |
US5237371A (en) * | 1988-09-20 | 1993-08-17 | Hitachi, Ltd. | Developing apparatus having charger for controlling charge on developer |
JP2011185771A (en) * | 2010-03-09 | 2011-09-22 | U-Tec Corp | Powder charge quantity measuring device |
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