System for and method of measuring sheet properties
Abstract
Abstract A machine direction property of a moving sheet is measured by determining deviation s between the average value of the property in a plurality of zones in a cross direction and an average value of the property for all the zones, as derived from a detector scanning across the sheet, and comparing the deviations with the detector output. The dector scans across the sheet a number of times to accumulate the deviations in each zone over a long time interval. Measurements made during successive scans are time weighted. Measurements between zones are interpolated as a function of a detector position. A machine direction parameter is controlled in response to the measured machine direction property.
Inventors
- 👤 Edward J Freeh
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |