Method and apparatus for measuring properties of a moving web

Details Method and apparatus for measuring properties of a moving web Method and apparatus for measuring properties of a moving web

1998-07-16

2000-08-29

Font, Frank G.

Optics: measuring and testing

By monitoring of webs or thread

356431, G01N 2184

Patent

active

061116513

ABSTRACT:
The invention relates to a method and apparatus for measuring properties of a moving web. A stimulus is directed onto the moving web by an excitation element and the effect of the web on the stimulus is measured with a detection element. At the measuring point the web is supported by a measurement support sheet. The measurement support sheet comprises at least two regions having different but known responsiveness to one or more forms of stimulus or causing different but known transformation to one or more forms of stimulus.

REFERENCES:
patent: 5400258 (1995-03-01), He
patent: 5492601 (1996-02-01), Ostermayer et al.

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