JPS5682989A - Double-feed detection system - Google Patents
Double-feed detection systemInfo
- Publication number
- JPS5682989A JPS5682989A JP16105879A JP16105879A JPS5682989A JP S5682989 A JPS5682989 A JP S5682989A JP 16105879 A JP16105879 A JP 16105879A JP 16105879 A JP16105879 A JP 16105879A JP S5682989 A JPS5682989 A JP S5682989A
- Authority
- JP
- Japan
- Prior art keywords
- transpierced
- light
- document
- circuit
- detected
- 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
Landscapes
- Conveying Record Carriers (AREA)
Abstract
PURPOSE: To detect double feeds of a document accurately by detecting the quantity of light transpierced through a document fed into a document reader and by comparing it with the previously stored quantity of transpierced light.
CONSTITUTION: The quantity of light transpierced through one document fed out of a hopper part is detected by detector 1 and then stored in memory circuit 4 via amplifier 2 and A/D converter 3. Next, documents fed out of the hopper part successively are read and the quantities of transpierced light detected during the read are compared with the output of memory circuit 4 by comparing circuit 5, whose comparison results are discriminated by discriminating circuit 6 to detect double feed. Thus, actually used detector 1, amplifier 2 and A/D converter 3 are used, so that any detection miss due to character deteriorations of them do not occur with regard to the memory contents of memory circuit 4. Therefore, the double feed is detected with accuracy.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16105879A JPS5682989A (en) | 1979-12-12 | 1979-12-12 | Double-feed detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16105879A JPS5682989A (en) | 1979-12-12 | 1979-12-12 | Double-feed detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5682989A true JPS5682989A (en) | 1981-07-07 |
Family
ID=15727805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16105879A Pending JPS5682989A (en) | 1979-12-12 | 1979-12-12 | Double-feed detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5682989A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5816376A (en) * | 1981-07-22 | 1983-01-31 | Hitachi Ltd | Setting system of slip reader |
US4557597A (en) * | 1982-05-31 | 1985-12-10 | Musashi Engineering Kabushiki Kaisha | Method of discriminating between the front and back sides of paper sheets |
-
1979
- 1979-12-12 JP JP16105879A patent/JPS5682989A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5816376A (en) * | 1981-07-22 | 1983-01-31 | Hitachi Ltd | Setting system of slip reader |
US4557597A (en) * | 1982-05-31 | 1985-12-10 | Musashi Engineering Kabushiki Kaisha | Method of discriminating between the front and back sides of paper sheets |
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