Patent US3706339A successfully refreshed from Google Patents.
US3706339A
Expired / Lapsed
US
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Control system
Assignee: Individual
•
Filing: 1970-04-08
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Granted: 1972-12-19
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Expires: 1990-04-08
Abstract
Abstract A moisture control system for use in paper making is disclosed as employing a traversing moisture sensor, the traversal time of which is made compatible with the thermal time constant of a dryer stage for such paper.
Inventors
- 👤 Edward C Bartles
- 👤 Raymond A Fraim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:20
CPC Classifications
D; D21; D21G; D21G9/00; D21G9/0009; D21G9/0036
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
Control apparatus comprising a. first means having a regulatable condition, b. signal responsive second means for regulating said condition and cooperative with said first means, and having therewith a certain time constant, c. third means, cooperative with said first means, for producing a signal variable as a function of such condition, d. fourth means, cooperative with said third means, for applying the signal of said third means to said second means, and e. fifth means for cyclically operating said fourth means at intervals proportional to said time constant.
Claim 2
Dependent Claim
88 words
Control apparatus comprising a. first means having a regulatable condition, b. signal responsive second means for regulating said condition and cooperative with said first means, and having therewith a certain time constant, c. third means, cooperative with said first means, for producing a signal variable as a function of such condition, d. fourth means, cooperative with said third means, for applying the signal of said third means to said second means, and e. fifth means for cyclically operating said fourth means at intervals proportional to said time constant.
Claim 3
Dependent Claim
42 words
The apparatus of Claim 1 wherein said first means is a heat exchanger, wherein the regulatable condition of said first means is its temperature, and wherein said second means is adapted to regulate the flow of thermal energy into said heat exchanger.
References Cited (Backward Citations)
US3450343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |