Web measurement device

Details Web measurement device Web measurement device

2008-08-28

2010-12-07

Pham, Hoa Q (Department: 2886)

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

C356S600000, C356S630000, C250S559270

Reexamination Certificate

active

07847943

ABSTRACT:
A sensor is provided that measures web caliper using optical and magnetic measuring devices. The optical measuring devices may employ a confocal chromatic aberration method to accurately determine the distance to the moving web and the magnetic devices may be ferrite core coil and target. Means of stabilizing a moving web are included for improving dynamic measurement accuracy.

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