JPS6448740A - Method for judging obverse or reverse of sheet material - Google Patents

Method for judging obverse or reverse of sheet material

Info

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
Application number
JP20319287A
Other languages
Japanese (ja)
Inventor
Shigeru Yoshino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP20319287A priority Critical patent/JPS6448740A/en
Priority to EP88101551A priority patent/EP0277652B1/en
Priority to US07/151,721 priority patent/US4825257A/en
Priority to DE3855243T priority patent/DE3855243T2/en
Publication of JPS6448740A publication Critical patent/JPS6448740A/en
Pending legal-status Critical Current

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.
JP20319287A 1987-02-03 1987-08-17 Method for judging obverse or reverse of sheet material Pending JPS6448740A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102883U (en) * 1990-02-07 1991-10-25

Citations (1)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102883U (en) * 1990-02-07 1991-10-25

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