JPS6271650U - - Google Patents
Info
- Publication number
- JPS6271650U JPS6271650U JP16449485U JP16449485U JPS6271650U JP S6271650 U JPS6271650 U JP S6271650U JP 16449485 U JP16449485 U JP 16449485U JP 16449485 U JP16449485 U JP 16449485U JP S6271650 U JPS6271650 U JP S6271650U
- Authority
- JP
- Japan
- Prior art keywords
- magnet roller
- detection sensor
- outer circumferential
- circumferential surface
- developing device
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000003756 stirring Methods 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図はこの考案の実施例である濃度検知セン
サを備えた現像装置の構造を示す側面断面図、第
２図は同現像装置と従来の現像装置との出力電圧
の変化量と中断時間との関係を示す図、第３図は
この発明の実施例が有する濃度検知センサに備え
られた導電性シートの効果を従来のものとの差を
もつて示す図、第４図は第２図に示す関係を得る
ために行つた実験方法を濃度検知センサの出力電
圧と時間との関係によつて示す図、第５図は濃度
検知センサの出力電圧と現像剤中におけるトナー
濃度との関係を示す図である。
１……現像装置、２……濃度検知センサ、２ａ
……検知面、３……導電性シート、４ａ，４ｂ…
…カバー、５……凹部、６……スクレーパ軸、７
……マグネツトローラ。
Fig. 1 is a side sectional view showing the structure of a developing device equipped with a density detection sensor which is an embodiment of this invention, and Fig. 2 shows the amount of change in output voltage and interruption time between the developing device and a conventional developing device. 3 is a diagram showing the effect of the conductive sheet provided in the concentration detection sensor of the embodiment of the present invention compared to the conventional one, and FIG. 4 is a diagram showing the difference from the conventional one. Figure 5 shows the relationship between the output voltage of the concentration detection sensor and the toner concentration in the developer. It is a diagram. 1... Developing device, 2... Density detection sensor, 2a
...Detection surface, 3...Conductive sheet, 4a, 4b...
...Cover, 5...Recess, 6...Scraper shaft, 7
...Magnetic roller.
Claims (1)
た濃度検知センサの検知面に、摩擦によりトナー
と反対の極性に帯電する導電性シートと、マグネ
ツトローラの外周面との間に凹部を形成するカバ
ーとを備え、マグネツトローラの外周面の近傍に
撹拌部材を設けてなる濃度検知センサを備えた現
像装置。 A concave portion is formed between the conductive sheet, which is charged to the opposite polarity to the toner due to friction, and the outer circumferential surface of the magnet roller, on the detection surface of a density detection sensor provided opposite to the outer circumferential surface of the magnet roller. What is claimed is: 1. A developing device comprising: a cover; and a concentration detection sensor comprising a stirring member provided near the outer peripheral surface of a magnet roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16449485U JPH0419558Y2 (en) | 1985-10-24 | 1985-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16449485U JPH0419558Y2 (en) | 1985-10-24 | 1985-10-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6271650U true JPS6271650U (en) | 1987-05-07 |
| JPH0419558Y2 JPH0419558Y2 (en) | 1992-05-01 |
Family
ID=31093666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16449485U Expired JPH0419558Y2 (en) | 1985-10-24 | 1985-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419558Y2 (en) |
-
1985
- 1985-10-24 JP JP16449485U patent/JPH0419558Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0419558Y2 (en) | 1992-05-01 |