Moisture control system with curl compensation
Abstract
Abstract UPPER AND LOWER DRYING SECTIONS, EACH COMPRISING A PLURALITY OF STEAM-HEATED DRYING ROLLS, ARE EMPLOYED IN THE DRYING OF THE PAPER WEB AS IT PASSES THEREBETWEEN. A FIRST CONTROL LOOP IS ASSOCIATED WITH THE UPPER SECTION AND A SECOND CONTROL LOOP ASSOCITED WITH THE LOWER SECTION. THESE DRYER LOOPS DETERMINE THE RESPECTIVE AMOUNTS OF STEAM DELIVERED TO THE TWO SECTIONS. A MOISTURE CONTROL LOOP OUTPUTS A SET POINT TO THE FIRST DRYER LOOP AND A SECOND SET POINT IS PROVIDED FOR THE SECOND DRYER LOOP, THE SECOND SET POINT BEING MODIFIED SO THAT THE RATE OF STEAM FLOW TO THE SECOND DRYER SECTION IS MAINTAINED IN A PREFERRED RELATIONSHIP TO THE RATE SUPPLIED BY THE FIRST DRYER SECTION SO THAT THE CURL OF THE WEB IS MINIMIZED.
Inventors
- 👤 Marion A Keyes
- 👤 John Arthur Gudaz
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |