JPS5727848A - Sheet multifeed detector - Google Patents
Sheet multifeed detectorInfo
- Publication number
- JPS5727848A JPS5727848A JP10159680A JP10159680A JPS5727848A JP S5727848 A JPS5727848 A JP S5727848A JP 10159680 A JP10159680 A JP 10159680A JP 10159680 A JP10159680 A JP 10159680A JP S5727848 A JPS5727848 A JP S5727848A
- Authority
- JP
- Japan
- Prior art keywords
- output
- multifeeding
- magnet
- detecting
- detecting roller
- 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: In a detector for detecting multifeeding of sheet by displacement of a detecting roller, to detect the multifeeding with high accuracy by providing a magnet- electric converting element for generating an output corresponding to the displacement of the detecting roller and eliminating high frequency component from the output.
CONSTITUTION: When the notes laid one over the other are fed between a detecting roller 1 and a driving roller 2, the detecting roller 1 is lifted upward in the large, and a lever 3 is pivotally moved on a support shaft 4 on a large scale. So a magnet 12 fixed on the lever 3 displaces in the large, so that a magnetic flux piercing a magnet-electric converting element 13 mounted on a fixed member 11 is changed in the large to increase an output of the element 13. The output of a voltage comparator 22 connected to the element 13 is directly input, and on the other hand, the output of a sample hold circuit 23 where the output passing a delay circuit 29 is input is changed. After according to the output of the circuit 23, high frequency component based on creases is eliminated by a low-pass filter 24, a multifeeding decision signal is output from the comparator 25.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10159680A JPS5727848A (en) | 1980-07-23 | 1980-07-23 | Sheet multifeed detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10159680A JPS5727848A (en) | 1980-07-23 | 1980-07-23 | Sheet multifeed detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5727848A true JPS5727848A (en) | 1982-02-15 |
Family
ID=14304757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10159680A Pending JPS5727848A (en) | 1980-07-23 | 1980-07-23 | Sheet multifeed detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5727848A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07179247A (en) * | 1993-12-24 | 1995-07-18 | Kofu Nippon Denki Kk | Paper sheet thickness detecting mechanism |
JP2020086208A (en) * | 2018-11-28 | 2020-06-04 | 株式会社沖データ | Medium thickness detection device, medium conveyance device, and image forming apparatus |
-
1980
- 1980-07-23 JP JP10159680A patent/JPS5727848A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07179247A (en) * | 1993-12-24 | 1995-07-18 | Kofu Nippon Denki Kk | Paper sheet thickness detecting mechanism |
JP2020086208A (en) * | 2018-11-28 | 2020-06-04 | 株式会社沖データ | Medium thickness detection device, medium conveyance device, and image forming apparatus |
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