G - Physics
01
N
340/123.4
G01N 21/59 (2006.01) G01B 11/30 (2006.01) G01N 21/86 (2006.01) G01N 21/89 (2006.01)
Patent
CA 1089551
ABSTRACT OF DISCLOSURE GRAININESS SENSOR The degree of graininess or grainy edges of a traveling web may be discriminated utilizing the present invention which relates to a method and apparatus for gener- ating a topographic signal by sensing scattered light from instantaneously illuminated areas of less than 1 mm in dia- meter on the surface of the web, processing at least a sig- nificant amount of said signal representative of topogra- phic features of the web of selected lengths in the di- rection of travel of said web of at least 1.5 mm to deter- mine the amount of such features of said selected length, said selected lenghts contributing significantly to the graininess of the web, and thereby providing an indication of the graininess of said web.
306279
Domtar Inc.
Fox Robert H.
LandOfFree
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