MX9704865A - Device and method for checking patterns disposed on a material strip and the material strip. - Google Patents

Device and method for checking patterns disposed on a material strip and the material strip.

Info

Publication number
MX9704865A
MX9704865A MX9704865A MX9704865A MX9704865A MX 9704865 A MX9704865 A MX 9704865A MX 9704865 A MX9704865 A MX 9704865A MX 9704865 A MX9704865 A MX 9704865A MX 9704865 A MX9704865 A MX 9704865A
Authority
MX
Mexico
Prior art keywords
material strip
detector
dark
areas
light areas
Prior art date
Application number
MX9704865A
Other languages
Spanish (es)
Inventor
Anders Hilmersson
Original Assignee
Tetra Laval Holdings & Finance
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 Tetra Laval Holdings & Finance filed Critical Tetra Laval Holdings & Finance
Priority to MX9704865A priority Critical patent/MX9704865A/en
Publication of MX9704865A publication Critical patent/MX9704865A/en

Links

Abstract

Method and device for checking patterns (1) disposed on a material strip (30) which patterns (1) consist of groups of dark and light areas (2,2*, 3,3*) succeeding in the travelling direction (v) of the material strip (30) and the checking respectively, by displacing the position of the dark areas (2, 3) and/or the light areas (2*, 3*) of one group with respect to a related detector (8, 9) in regard to the dark areas (2, 3) and/or light areas (2*, 3*) of another group with respect to another related detector (8, 9) by detecting the existence or non-existence of dark areas and/or light areas and by creating a sequence of output signals dependent on the result of the detection by combining the output signals comprising information concerning said dark or light areas (2,2*, 3,3*) of each detector (8, 9) with the output signals depending on the detection of one of said dark or light areas (2,2*, 3,3*) of the other detector (8, 9) in a predetermined way by for example alternately activating each detector (8, 9) by the other detector (8, 9) and by comparing this sequence of output signals with a predetermined sequence of signals.
MX9704865A 1997-06-27 1997-06-27 Device and method for checking patterns disposed on a material strip and the material strip. MX9704865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MX9704865A MX9704865A (en) 1997-06-27 1997-06-27 Device and method for checking patterns disposed on a material strip and the material strip.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MX9704865A MX9704865A (en) 1997-06-27 1997-06-27 Device and method for checking patterns disposed on a material strip and the material strip.

Publications (1)

Publication Number Publication Date
MX9704865A true MX9704865A (en) 1998-06-30

Family

ID=39491349

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9704865A MX9704865A (en) 1997-06-27 1997-06-27 Device and method for checking patterns disposed on a material strip and the material strip.

Country Status (1)

Country Link
MX (1) MX9704865A (en)

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Legal Events

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