Measuring and testing – Surface and cutting edge testing
Patent
1989-09-11
1991-01-08
Noland, Tom
Measuring and testing
Surface and cutting edge testing
73159, G01B 2130
Patent
active
049826000
ABSTRACT:
To measure the period with which a surface defect recurs in a surface of a web-like material moving in its lengthwise direction, surface defects distributed over the surface are detected in that lengthwise direction. Positional data and distance data as to the detected surface defects relative to one another are collected for a predetermined length of the web-like material. The web-like material is determined to have a periodic surface defect appearing with a period between predetermined maximum and minimum periods when the distance data include a distance equivalent to an elemental period that is a whole-number multiple of a fundamental period.
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Kiso Takeshi
Masuda Takanori
Fuji Photo Film Co. , Ltd.
Noland Tom
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