JPH02129353U - - Google Patents
Info
- Publication number
- JPH02129353U JPH02129353U JP3653289U JP3653289U JPH02129353U JP H02129353 U JPH02129353 U JP H02129353U JP 3653289 U JP3653289 U JP 3653289U JP 3653289 U JP3653289 U JP 3653289U JP H02129353 U JPH02129353 U JP H02129353U
- Authority
- JP
- Japan
- Prior art keywords
- document
- conveyance means
- contact glass
- document conveyance
- stopping
- 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 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000011109 contamination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Controlling Sheets Or Webs (AREA)
- Holders For Sensitive Materials And Originals (AREA)
Description
第１図は本考案が適用される複写装置の要部構
成図、第２図は上面側を切り欠いた状態の原稿搬
送ベルトおよびローラの平面図、第３図は原稿搬
送ベルトの汚れを示す説明図、第４図は受光光量
と出力信号の関係図、第５図は汚れ検知制御のス
レツシユレベルの説明図、第６図は複写装置の制
御系の要部の説明図、第７図は原稿相当部の濃度
と現像バイアスの関係図である。
１……原稿搬送ベルト、３……コンタクトガラ
ス、４……光フアイバ。
Figure 1 is a block diagram of the main parts of a copying machine to which the present invention is applied, Figure 2 is a plan view of the document conveyance belt and rollers with the top side cut away, and Figure 3 shows dirt on the document conveyance belt. Explanatory diagram, Fig. 4 is a diagram of the relationship between the amount of received light and the output signal, Fig. 5 is an explanatory diagram of the threshold level of dirt detection control, Fig. 6 is an explanatory diagram of the main parts of the control system of the copying machine, and Fig. 7 is a diagram showing the relationship between the density of the portion corresponding to the original and the developing bias. 1... Original conveyance belt, 3... Contact glass, 4... Optical fiber.
Claims (1)
で停止させる原稿搬送手段とコンタクトガラスを
挟んで対向する位置に、原稿搬送手段の汚れを光
学的に検知する検知手段を設けたことを特徴とす
る原稿搬送手段の汚れ検知装置。 A document characterized in that a document conveyance means for conveying the document onto a contact glass and stopping at a predetermined position and a detection means for optically detecting dirt on the document conveyance means are provided at a position opposite to each other across the contact glass. Contamination detection device for conveyance means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3653289U JPH02129353U (en) | 1989-03-31 | 1989-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3653289U JPH02129353U (en) | 1989-03-31 | 1989-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02129353U true JPH02129353U (en) | 1990-10-25 |
Family
ID=31542843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3653289U Pending JPH02129353U (en) | 1989-03-31 | 1989-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02129353U (en) |
-
1989
- 1989-03-31 JP JP3653289U patent/JPH02129353U/ja active Pending