JPS6443705A - Edge detecting device for sheet - Google Patents
Edge detecting device for sheetInfo
- Publication number
- JPS6443705A JPS6443705A JP62200434A JP20043487A JPS6443705A JP S6443705 A JPS6443705 A JP S6443705A JP 62200434 A JP62200434 A JP 62200434A JP 20043487 A JP20043487 A JP 20043487A JP S6443705 A JPS6443705 A JP S6443705A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- edge
- reference value
- value
- sensor
- 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
- Length Measuring Devices By Optical Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE:To take an accurate measurement even in case of the density variation of the edge of a sheet by setting a predetermined reference value in a detector which recognizes the edge position of the sheet and outputs a video signal. CONSTITUTION:An image sensor 3 outputs the video signal S1 generated by recognizing the edge position of the sheet 2 by a light receiving element 1 and a pulse counter circuit 9 converts the signal S1 from the sensor 3 into the number of pulses corresponding to the actual edge position of the sheet 2. Then a computing element 14 calculates the deviation between the target position of the edge of the sheet 2 and the actual position of the edge of the sheet 2 from the number of pulses obtained by the circuit 9. In this case, the output of the element 1 when the edge of the sheet 2 does not pass between the sensor 3 and a light source 4 is denoted as V1 and a value which is about 10% lower is set as the reference value V3. Here, if the density at the edge varies according to a pattern, the quantity of transmitted light varies, but the reference value V3 is about 10% lower than the value V1, thereby accurately detecting the edge without being affected by the variation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62200434A JPS6443705A (en) | 1987-08-10 | 1987-08-10 | Edge detecting device for sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62200434A JPS6443705A (en) | 1987-08-10 | 1987-08-10 | Edge detecting device for sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6443705A true JPS6443705A (en) | 1989-02-16 |
Family
ID=16424229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62200434A Pending JPS6443705A (en) | 1987-08-10 | 1987-08-10 | Edge detecting device for sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6443705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03167406A (en) * | 1989-11-27 | 1991-07-19 | Sekisui Chem Co Ltd | Apparatus for detecting width of lug part of sheet-shaped body |
| WO2014106896A1 (en) | 2013-01-07 | 2014-07-10 | Ykk株式会社 | Molded planar fastener and production method for cushion body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5229460A (en) * | 1975-08-30 | 1977-03-05 | Nhk Spring Co Ltd | Spring dimensions detector for coil spring producing machine |
| JPS581382A (en) * | 1981-06-25 | 1983-01-06 | Mitsubishi Electric Corp | Detector for television signal |
-
1987
- 1987-08-10 JP JP62200434A patent/JPS6443705A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5229460A (en) * | 1975-08-30 | 1977-03-05 | Nhk Spring Co Ltd | Spring dimensions detector for coil spring producing machine |
| JPS581382A (en) * | 1981-06-25 | 1983-01-06 | Mitsubishi Electric Corp | Detector for television signal |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03167406A (en) * | 1989-11-27 | 1991-07-19 | Sekisui Chem Co Ltd | Apparatus for detecting width of lug part of sheet-shaped body |
| WO2014106896A1 (en) | 2013-01-07 | 2014-07-10 | Ykk株式会社 | Molded planar fastener and production method for cushion body |
| US9936773B2 (en) | 2013-01-07 | 2018-04-10 | Ykk Corporation | Molded hook and loop fastener and method of manufacturing cushion body |
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