JPH0177651U - - Google Patents
Info
- Publication number
- JPH0177651U JPH0177651U JP1987173345U JP17334587U JPH0177651U JP H0177651 U JPH0177651 U JP H0177651U JP 1987173345 U JP1987173345 U JP 1987173345U JP 17334587 U JP17334587 U JP 17334587U JP H0177651 U JPH0177651 U JP H0177651U
- Authority
- JP
- Japan
- Prior art keywords
- funnel
- developer
- flow rate
- pipe section
- toner concentration
- 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 2
- 230000035699 permeability Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dry Development In Electrophotography (AREA)
Description
第１図はこの考案の一実施例を示す縦断側面図
、第２図は現像剤量―発振周波数特性図、第３図
はトナー濃度の高・低による時間―発振周波数特
性図、第４図は変形例を示す縦断側面図、第５図
は従来例を示す縦断側面図である。
１……オリフイス部、２……保持部、３……ロ
ート、４……パイプ部、５……コイル、１１……
流量可変装置。
Fig. 1 is a longitudinal side view showing an embodiment of this invention, Fig. 2 is a developer amount-oscillation frequency characteristic diagram, Fig. 3 is a time-oscillation frequency characteristic diagram depending on high and low toner concentration, and Fig. 4 5 is a vertical side view showing a modified example, and FIG. 5 is a vertical side view showing a conventional example. 1... Orifice part, 2... Holding part, 3... Funnel, 4... Pipe part, 5... Coil, 11...
Variable flow rate device.
Claims (1)
部の下端に位置する所定直径のオリフイス部とか
らなるロートと、このロートの前記オリフイス部
の下方から連通し前記オリフイス部より直径の大
きい内径のパイプ部と、このパイプ部の外周に巻
回されたコイルとを一体的に結合させてなるセン
サーと、このセンサーに流れる現像剤流量を任意
の間隔で可変させる流量可変装置と、前記コイル
が接続されて前記ロートから自由落下する現像剤
の流動度を透磁率の変化として検知するトナー濃
度の検出回路とよりなることを特徴とするトナー
濃度検出装置。 A funnel consisting of an upwardly expanding holding part that holds developer and an orifice part of a predetermined diameter located at the lower end of this holding part, and an inner diameter that communicates from below the orifice part of this funnel and has a larger diameter than the orifice part. a sensor formed by integrally combining a pipe section and a coil wound around the outer periphery of the pipe section; a flow rate variable device for varying the flow rate of developer flowing through the sensor at arbitrary intervals; A toner concentration detection device comprising: a toner concentration detection circuit connected to the funnel for detecting the fluidity of the developer freely falling from the funnel as a change in magnetic permeability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987173345U JPH0177651U (en) | 1987-11-13 | 1987-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987173345U JPH0177651U (en) | 1987-11-13 | 1987-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0177651U true JPH0177651U (en) | 1989-05-25 |
Family
ID=31465271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987173345U Pending JPH0177651U (en) | 1987-11-13 | 1987-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0177651U (en) |
-
1987
- 1987-11-13 JP JP1987173345U patent/JPH0177651U/ja active Pending
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