JPH0485460U - - Google Patents
Info
- Publication number
- JPH0485460U JPH0485460U JP12995390U JP12995390U JPH0485460U JP H0485460 U JPH0485460 U JP H0485460U JP 12995390 U JP12995390 U JP 12995390U JP 12995390 U JP12995390 U JP 12995390U JP H0485460 U JPH0485460 U JP H0485460U
- Authority
- JP
- Japan
- Prior art keywords
- drum
- measuring
- development potential
- insulating layer
- electrically connected
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Description
第１図は本考案にかかる電極ドラムを使用した
測定の原理を説明するための模式図であり、第２
図は本考案並びに比較の電極ドラムを使用して測
定した現像電圧の減衰曲線を示すグラフ図である
。なお、図中引照数字は以下の内容を示す。
２……絶縁性層部、３……導電性基部、４……
樹脂層、５……電極部、６……コンデンサー。
FIG. 1 is a schematic diagram for explaining the principle of measurement using the electrode drum according to the present invention.
The figure is a graph showing development voltage attenuation curves measured using electrode drums of the present invention and a comparative example. The reference numbers in the figure indicate the following contents. 2... Insulating layer portion, 3... Conductive base, 4...
Resin layer, 5... Electrode part, 6... Capacitor.
Claims (1)
対して感光ドラムと同様の位置関係にて回転可能
な状態で使用される現像電位測定用ドラムにおい
て、 該電極ドラムは、 接地されうる円筒状導電性基部と、 該基部の表面に形成された絶縁性層部と、 該絶縁性層部の表面に上記磁気ブラシと接触
可能で且つ導電性基部と直接導通のない状態で電
位測定のためのコンデンサーに電気的に接続され
た電極部と、 を有することを特徴とする現像電位測定用ドラム
。[Claims for Utility Model Registration] In a development potential measuring drum that is used in a rotatable state relative to a magnetic brush developing device in the same positional relationship as a photosensitive drum in order to measure the development potential, the electrode drum comprises: , a cylindrical conductive base that can be grounded, an insulating layer formed on the surface of the base, and a state in which the surface of the insulating layer can be contacted with the magnetic brush and is not directly electrically connected to the conductive base. A drum for measuring development potential, comprising: an electrode part electrically connected to a capacitor for measuring potential;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12995390U JPH0485460U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12995390U JPH0485460U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0485460U true JPH0485460U (en) | 1992-07-24 |
Family
ID=31877327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12995390U Pending JPH0485460U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0485460U (en) |
-
1990
- 1990-11-30 JP JP12995390U patent/JPH0485460U/ja active Pending
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