JPS6448740A - Method for judging obverse or reverse of sheet material - Google Patents
Method for judging obverse or reverse of sheet materialInfo
- Publication number
- JPS6448740A JPS6448740A JP20319287A JP20319287A JPS6448740A JP S6448740 A JPS6448740 A JP S6448740A JP 20319287 A JP20319287 A JP 20319287A JP 20319287 A JP20319287 A JP 20319287A JP S6448740 A JPS6448740 A JP S6448740A
- Authority
- JP
- Japan
- Prior art keywords
- obverse
- reverse
- sheet material
- boundary value
- value
- 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
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
PURPOSE:To judge the obverse or reverse of a sheet material by setting a boundary value between the specular reflected light values of the obverse and reverse, measuring a specular reflected light value at a predetermined incident angle on one surface, and comparing the value with the boundary value. CONSTITUTION:A photo-detecting element 302 is arranged in such a position as to receive a specular reflected light, out of lights from a light source 301, at a predetermined incident angle theta with respect to a sheet material C or an image receiving paper. And then, a signal corresponding to the amount of light received thereat is amplified by means of an amplifier 303 so as to be compared with a boundary value by means of a judging device 304 where the boundary value between respective grades of glossiness on the obverse and reverse of the sheet material is previously set. Thereby, the obverse or reverse of the sheet material C is judged so that, on the basis of the signal, a paper supply controller 305 performs control either to stop or continue the paper supply. Therefore, it is possible to prevent any faulty operation caused by misjudgement of the obverse or reverse.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20319287A JPS6448740A (en) | 1987-08-17 | 1987-08-17 | Method for judging obverse or reverse of sheet material |
EP88101551A EP0277652B1 (en) | 1987-02-03 | 1988-02-03 | Picture recording method |
US07/151,721 US4825257A (en) | 1987-02-03 | 1988-02-03 | Picture recording method |
DE3855243T DE3855243T2 (en) | 1987-02-03 | 1988-02-03 | Image recording method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20319287A JPS6448740A (en) | 1987-08-17 | 1987-08-17 | Method for judging obverse or reverse of sheet material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6448740A true JPS6448740A (en) | 1989-02-23 |
Family
ID=16469988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20319287A Pending JPS6448740A (en) | 1987-02-03 | 1987-08-17 | Method for judging obverse or reverse of sheet material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6448740A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03102883U (en) * | 1990-02-07 | 1991-10-25 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60871A (en) * | 1983-06-16 | 1985-01-05 | キヤノン株式会社 | Printing surface judge apparatus |
-
1987
- 1987-08-17 JP JP20319287A patent/JPS6448740A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60871A (en) * | 1983-06-16 | 1985-01-05 | キヤノン株式会社 | Printing surface judge apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03102883U (en) * | 1990-02-07 | 1991-10-25 |
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