G - Physics – 01 – P
Patent
G - Physics
01
P
73/45
G01P 3/26 (2006.01) G01P 3/64 (2006.01)
Patent
CA 2024649
ABSTRACT OF THE DISCLOSURE A system for determining the rotational, or cyclic, speed and rotational position of a looped traveling belt, such as a felt in a papermaking machine, utilizes a discontinuity, or caliper variation, in the surface of the belt near one edge thereof. A fluid stream, such as compressed air, is projected against the web along the annular area containing the discontinuity, and a pressure transducer is mounted in fixed proximity with the belt downstream of, and aligned with, the fluid stream. The transducer senses differences in the pressure of the fluid stream projected against the belt and against the discontinuity, and produces a signal indicative of the passage of the discontinuity past the transducer. The time interval of this signal is used to compute the cyclic speed of the traveling belt and to identify the part of the belt passing through a nipped roll couple at another location.
Metso Paper Inc.
Mitsubishi Heavy Industries Ltd.
Ridout & Maybee Llp
LandOfFree
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