JPS5566437A - Paper jam detecting system - Google Patents
Paper jam detecting systemInfo
- Publication number
- JPS5566437A JPS5566437A JP13821378A JP13821378A JPS5566437A JP S5566437 A JPS5566437 A JP S5566437A JP 13821378 A JP13821378 A JP 13821378A JP 13821378 A JP13821378 A JP 13821378A JP S5566437 A JPS5566437 A JP S5566437A
- Authority
- JP
- Japan
- Prior art keywords
- jam
- differential
- paper
- detectors
- outputs
- 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
- Controlling Sheets Or Webs (AREA)
Abstract
PURPOSE: To detect a paper jam promptly, by measuring correlation between detecting signals transmitted from recording paper feed perforation detectors located at the conveying passage.
CONSTITUTION: Two feed perforation detectors 2 and 3 are situated at the conveying passage of a recording paper 1 conveyed by means of tractors 4 and 5. The outputs of the detectors 2 and 3 are fed to wave-form shaping circuits 7 and 8, respectively, wherefrom signals having a period equivalent to a distance between the feed perforations are put out. The outputs are inputted to a differential device 11 via F-V conversion circuits 9 and 10, the differential voltages being detected. The differential voltages are compared with the threshold voltage established at a voltage comparision circuit 12, a jam signal being put out when the differential voltage exceeds the threshold voltage. This permits the reliable detection of the jam as a result of the difference in and the pulsation of a conveying speed of the paper being cancelled.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13821378A JPS5566437A (en) | 1978-11-09 | 1978-11-09 | Paper jam detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13821378A JPS5566437A (en) | 1978-11-09 | 1978-11-09 | Paper jam detecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566437A true JPS5566437A (en) | 1980-05-19 |
Family
ID=15216716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13821378A Pending JPS5566437A (en) | 1978-11-09 | 1978-11-09 | Paper jam detecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566437A (en) |
-
1978
- 1978-11-09 JP JP13821378A patent/JPS5566437A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1533630A (en) | Sheet detecting method and apparatus | |
GB1331457A (en) | Ultrasonic detection circuit | |
JPS5566437A (en) | Paper jam detecting system | |
GB1492331A (en) | Detection apparatus | |
JPS5535702A (en) | Sheet adjuster | |
JPS5426800A (en) | Paper curency discrimanating apparatus | |
JPS56101283A (en) | Counter for number of sheet of paper | |
JPS5535713A (en) | Jam detector for bill dispenser | |
JPS57184041A (en) | Detection device of the multi-feed of paper | |
JPS5552812A (en) | Safety device for conveyor belt | |
JPS57198809A (en) | System for improving signal to noise ratio | |
JPS54138442A (en) | Abnormal state detecting device of recording device or the like | |
JPS5637945A (en) | Method of detecting abnormality of paper feed | |
JPS57180547A (en) | Duplex feeding detector | |
JPS57109951A (en) | Loop detector of photographic printer | |
JPS56149934A (en) | Detector for jamming of paper | |
GB1484954A (en) | Device for detecting elongation of a conveyor belt joint | |
JPS5332068A (en) | Signal detecting circuit | |
JPS5564254A (en) | Double feed detector of paper | |
JPS57131650A (en) | Jam detector | |
JPS5739665A (en) | Recording paper choke detecting method for facsimile receiver | |
JPS54153086A (en) | Color detector of parer form objects | |
JPS57144571A (en) | Double feed detector | |
JPS524243A (en) | Jam detecting system and unit | |
JPS54147045A (en) | Mark detecting system of wet type electrostatic recording paper |