JPS6333167U - - Google Patents
Info
- Publication number
- JPS6333167U JPS6333167U JP12621686U JP12621686U JPS6333167U JP S6333167 U JPS6333167 U JP S6333167U JP 12621686 U JP12621686 U JP 12621686U JP 12621686 U JP12621686 U JP 12621686U JP S6333167 U JPS6333167 U JP S6333167U
- Authority
- JP
- Japan
- Prior art keywords
- toner concentration
- toner
- polarity
- detection device
- predetermined voltage
- 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 6
- 238000000034 method Methods 0.000 claims 1
- 108091008695 photoreceptors Proteins 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
第１図は、本実施例のトナー濃度検知装置を適
用した現像器の要部を示す要部断面図、第２図は
、センサ及びスリーブに印加するバイアス電圧の
制御を説明するための図、第３図は、従来のトナ
ー濃度検知装置を適用した現像器の要部を示す概
略構成図、第４図は、上記従来のトナー濃度検知
装置の動作説明を行なうための図である。
４５…センサ、４５ａ…振動面、４５ｂ…絶縁
層、４５ｃ…導電層、６０…スイツチ、ＶＢ３，
ＶＢ４…バイアス電圧。
FIG. 1 is a sectional view showing the main parts of a developing device to which the toner concentration detection device of the present embodiment is applied, and FIG. 2 is a diagram for explaining control of the bias voltage applied to the sensor and the sleeve. FIG. 3 is a schematic diagram showing the main parts of a developing device to which a conventional toner concentration detection device is applied, and FIG. 4 is a diagram for explaining the operation of the conventional toner concentration detection device. 45...Sensor, 45a...Vibration surface, 45b...Insulating layer, 45c...Conductive layer, 60...Switch, VB3 ,
VB 4 ...Bias voltage.
Claims (1)
反転現像法により感光体上の露光部を現像し電歪
振動子によりトナー濃度を検知する現像装置にお
いて、前記電歪振動子の振動面上に絶縁層を設け
、該絶縁層の上に導電層を設け、該導電層に所定
電圧を印加することを特徴とするトナー濃度検知
装置。 (2) 前記所定電圧は、現像時と非現像時におい
て極性を切り換えることを特徴とする実用新案登
録請求の範囲第１項記載のトナー濃度検知装置。 (3) 現像時に前記導電層に印加される所定電圧
の極性は、トナーの極性と同極性であることを特
徴とする実用新案登録請求の範囲第２項記載のト
ナー濃度検知装置。[Scope of claims for utility model registration] (1) Using a developer consisting of a carrier and toner,
In a developing device that develops an exposed area on a photoreceptor by a reversal development method and detects toner concentration using an electrostrictive vibrator, an insulating layer is provided on the vibrating surface of the electrostrictive vibrator, and a conductive layer is provided on the insulating layer. What is claimed is: 1. A toner concentration detection device comprising: a toner concentration detecting device, wherein a predetermined voltage is applied to the conductive layer. (2) The toner concentration detection device according to claim 1, wherein the polarity of the predetermined voltage is switched between during development and during non-development. (3) The toner concentration detection device according to claim 2, wherein the polarity of the predetermined voltage applied to the conductive layer during development is the same as the polarity of the toner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12621686U JPS6333167U (en) | 1986-08-18 | 1986-08-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12621686U JPS6333167U (en) | 1986-08-18 | 1986-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6333167U true JPS6333167U (en) | 1988-03-03 |
Family
ID=31019810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12621686U Pending JPS6333167U (en) | 1986-08-18 | 1986-08-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6333167U (en) |
-
1986
- 1986-08-18 JP JP12621686U patent/JPS6333167U/ja active Pending
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