JPS5593080A - Detecting method for conductive powder - Google Patents
Detecting method for conductive powderInfo
- Publication number
- JPS5593080A JPS5593080A JP16562878A JP16562878A JPS5593080A JP S5593080 A JPS5593080 A JP S5593080A JP 16562878 A JP16562878 A JP 16562878A JP 16562878 A JP16562878 A JP 16562878A JP S5593080 A JPS5593080 A JP S5593080A
- Authority
- JP
- Japan
- Prior art keywords
- hopper
- circuit
- conductive powder
- powder
- coil
- 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
Abstract
PURPOSE: To detect whether the container of a copying machine, etc., contains conductive powder or not, by making use of variation in the impedance of a high- frequency oscillation coil by an adjacent conductive body.
CONSTITUTION: On an external wall close to the bottom of side plate 4 of hopper 1 of a copying machine, detection coil 5 constituting one part of a high-frequency oscillation circuit is installed. The output of this oscillation circuit is led to a circuit composed of a rectifier circuit, switching circuit and display lamp. Now, when the oscillator circuit is driven and there is conductive powder in hopper 1, impedance of coil 5 varies to change oscillation states. Detecting this makes it possible to display whether there is powder left in hopper 1 or not. Further, the detection coil is fitted to any other transport pipe than the hopper to detect the existence of the powder in the transport pipe. In this way, the existence of the conductive powder in the container which can not be confirmed by the eye can easily be detected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16562878A JPS5593080A (en) | 1978-12-30 | 1978-12-30 | Detecting method for conductive powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16562878A JPS5593080A (en) | 1978-12-30 | 1978-12-30 | Detecting method for conductive powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5593080A true JPS5593080A (en) | 1980-07-15 |
Family
ID=15815967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16562878A Pending JPS5593080A (en) | 1978-12-30 | 1978-12-30 | Detecting method for conductive powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5593080A (en) |
-
1978
- 1978-12-30 JP JP16562878A patent/JPS5593080A/en active Pending
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