JPH0241265U - - Google Patents
Info
- Publication number
- JPH0241265U JPH0241265U JP11964788U JP11964788U JPH0241265U JP H0241265 U JPH0241265 U JP H0241265U JP 11964788 U JP11964788 U JP 11964788U JP 11964788 U JP11964788 U JP 11964788U JP H0241265 U JPH0241265 U JP H0241265U
- Authority
- JP
- Japan
- Prior art keywords
- toner
- dielectric constant
- detection device
- detected based
- electrode plates
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Description
第１図ａ，ｂは本考案の原理を説明する図、第
２図乃至第４図は本考案の一実施例を示した図、
第５図は従来用いられていたトナー残量検出装置
を示す図である。
２４……感光体、２７……現像装置、２８……
トナーカートリツジ、３５……トナー残量検出装
置、４０……現像ローラ、４１……補給ローラ、
４２……クリーニングローラ、４３……薄層ロー
ラ、５０……検出端子。
Figures 1a and b are diagrams explaining the principle of the present invention, Figures 2 to 4 are diagrams showing an embodiment of the present invention,
FIG. 5 is a diagram showing a conventional toner remaining amount detection device. 24...Photoreceptor, 27...Developing device, 28...
Toner cartridge, 35...toner remaining amount detection device, 40...developing roller, 41...replenishment roller,
42...Cleaning roller, 43...Thin layer roller, 50...Detection terminal.
Claims (1)
す電子写真複写機において、該現像装置内のトナ
ー搬送路上に少なくとも２枚以上の電極板を平行
に配置し、該電極板に電圧を印加するようにした
ことを特徴とするトナー残留検出装置。 (2) トナーの誘電率と空気の誘電率との差によ
り上記電極板間の電気容量の変化を検出し、該検
出値によりトナーの有無を検知したことを特徴と
する請求項第１項記載のトナー残留検出装置。[Claims for Utility Model Registration] (1) In an electrophotographic copying machine having a developing device using a non-magnetic dry toner developing method, at least two or more electrode plates are arranged in parallel on a toner conveying path in the developing device. A residual toner detection device characterized in that a voltage is applied to the electrode plate. (2) A change in capacitance between the electrode plates is detected based on a difference between a dielectric constant of toner and a dielectric constant of air, and the presence or absence of toner is detected based on the detected value. Toner residual detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11964788U JPH0241265U (en) | 1988-09-12 | 1988-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11964788U JPH0241265U (en) | 1988-09-12 | 1988-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0241265U true JPH0241265U (en) | 1990-03-22 |
Family
ID=31365057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11964788U Pending JPH0241265U (en) | 1988-09-12 | 1988-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241265U (en) |
-
1988
- 1988-09-12 JP JP11964788U patent/JPH0241265U/ja active Pending
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