Coating processes – Measuring – testing – or indicating – Thickness or uniformity of thickness determined
Patent
1979-03-19
1981-06-30
Hoffman, James R.
Coating processes
Measuring, testing, or indicating
Thickness or uniformity of thickness determined
427 9, 365 51, 365 72, 324212, G01B 704, G01B 1104
Patent
active
042763240
ABSTRACT:
The invention relates to a method of contact-free, almost continuous measurement and monitoring of the width, thickness and position of magnetic tracks on moving film strips within wide limits of the speed. The track width and track position of the magnetic tracks are measured optically and the magnetically acting track cross section is measured electromagnetically via the track volume. The measured values are together recorded, evaluated and displayed and/or used for recontrolling the casting arrangement for emitting warning signals or for stopping the coating machine.
REFERENCES:
patent: 2751313 (1956-06-01), Speed et al.
Falk Hans
Hoffacker Franz
Klein Hans J.
Muller Josef
Pohler Friedmar
AGFA-Gevaert A.G.
Hoffman James R.
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