G - Physics – 01 – N
Patent
G - Physics
01
N
340/139, 73/58,
G01N 21/86 (2006.01) B32B 17/10 (2006.01) G01N 21/55 (2006.01)
Patent
CA 1182184
Abstract of the Invention A moisture analyzer sequentially directs a transmitted reference energy beam and a transmitted measurement energy beam toward a mirrored surface background plate as spaced plastic sheets advance along a path through the beams. During the testing period, beams are reflected from the sheets and plate as sheet and plate reflected measured beams and during the non-testing period only from the plate as plate reflected reference and measured beams. The reflected beams generated during the testing period are measured using a detector circuit to determine moisture çontent of the sheets. The background plate is selected to provide during the non-testing period a value as indicated by the detector circuit that is within the acceptable range for sheets as indicated by the detector circuit operating on the reflected beams generated during the testing period to reduce response time of the detector circuit changing from the non-testing period to the testing period.
405479
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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