JPS6468686A - Paper sheet detecting device - Google Patents
Paper sheet detecting deviceInfo
- Publication number
- JPS6468686A JPS6468686A JP62223983A JP22398387A JPS6468686A JP S6468686 A JPS6468686 A JP S6468686A JP 62223983 A JP62223983 A JP 62223983A JP 22398387 A JP22398387 A JP 22398387A JP S6468686 A JPS6468686 A JP S6468686A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- current
- values
- stored
- decided
- 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.)
- Granted
Links
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
PURPOSE:To reduce the influence of a secular change and to accurately detect a paper sheet by setting a current applied to a reflection type sensor before detection to the best value and correcting the sensitivity of the sensor. CONSTITUTION:A motor 14 is driven to move a carriage and a black reference reflecting plate 1 and the detection sensor 4 are opposed to each other. Then plural kinds of current value data are read out of a ROM 11 and applied to a D/A converter 5 to supply a current iL which increases gradually to a projection part 4A. Then the photodetection output of a photodetector 4B is compared with a threshold voltage VTH successively and current values which are decided as black values are stored in a RAM 12. Then a white reference reflecting plate 2 is opposed to the sensor 4 and current values which are decided as white values are stored similarly. Consequently, the center value of the stored current values is supplied to a projector 4A by reflecting plates 1 and 2 to detect recording paper 3. Thus, the sensor 4 is set to the best sensitivity and stable detection is performed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223983A JPH0814625B2 (en) | 1987-09-09 | 1987-09-09 | Paper sheet detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223983A JPH0814625B2 (en) | 1987-09-09 | 1987-09-09 | Paper sheet detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6468686A true JPS6468686A (en) | 1989-03-14 |
JPH0814625B2 JPH0814625B2 (en) | 1996-02-14 |
Family
ID=16806740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62223983A Expired - Fee Related JPH0814625B2 (en) | 1987-09-09 | 1987-09-09 | Paper sheet detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0814625B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5502209A (en) * | 1994-07-05 | 1996-03-26 | Sanwa Kagaku Kenkyusho Co., Ltd. | Benzopyrancarboxamide derivatives, salts thereof, process for the preparation of same and use thereof |
JP2010286536A (en) * | 2009-06-09 | 2010-12-24 | Kyocera Mita Corp | Image forming apparatus |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5748640A (en) * | 1980-09-08 | 1982-03-20 | Ricoh Co Ltd | Measuring apparatus of optical density |
JPS5970990A (en) * | 1982-10-18 | 1984-04-21 | Ricoh Co Ltd | Light regulation |
JPS60149948A (en) * | 1984-01-18 | 1985-08-07 | Yaskawa Electric Mfg Co Ltd | Density detection apparatus |
JPS61188532A (en) * | 1985-02-18 | 1986-08-22 | Ricoh Co Ltd | Device for detecting original density in copying machine |
-
1987
- 1987-09-09 JP JP62223983A patent/JPH0814625B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5748640A (en) * | 1980-09-08 | 1982-03-20 | Ricoh Co Ltd | Measuring apparatus of optical density |
JPS5970990A (en) * | 1982-10-18 | 1984-04-21 | Ricoh Co Ltd | Light regulation |
JPS60149948A (en) * | 1984-01-18 | 1985-08-07 | Yaskawa Electric Mfg Co Ltd | Density detection apparatus |
JPS61188532A (en) * | 1985-02-18 | 1986-08-22 | Ricoh Co Ltd | Device for detecting original density in copying machine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5502209A (en) * | 1994-07-05 | 1996-03-26 | Sanwa Kagaku Kenkyusho Co., Ltd. | Benzopyrancarboxamide derivatives, salts thereof, process for the preparation of same and use thereof |
JP2010286536A (en) * | 2009-06-09 | 2010-12-24 | Kyocera Mita Corp | Image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0814625B2 (en) | 1996-02-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |