US4192080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining an even moisture profile in a cylinder drier and a means for carrying out the method
Assignee: Individual
•
Filing: 1978-01-12
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Granted: 1980-03-11
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Expires: 1998-01-12
Abstract
Abstract A method of improving the drying characteristics of a cylinder drying section of a paper or a cardboard machine so that an essentially even transverse moisture profile of the dried paper or cardboard web is achieved by this drier comprises coating the rim areas of the outer jacket surface of at least some of the drying cylinders with a heat-insulating foil.
Inventors
- 👤 Eero A. Irpola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:45
CPC Classifications
D; D21; D21F; D21F5/00; D21F5/02; D21F5/021; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1033
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
Method to improve the drying characteristics of the cylinder drying section of a paper or cardboard machine so that an essentially even transverse moisture profile of the dried paper or cardboard web is achieved by this dryer, the improvement comprising coating of the rim areas of the outer jacket surface of at least some of the drying cylinders with a heat insulating foil.
Claim 2
Dependent Claim
63 words
Method to improve the drying characteristics of the cylinder drying section of a paper or cardboard machine so that an essentially even transverse moisture profile of the dried paper or cardboard web is achieved by this dryer, the improvement comprising coating of the rim areas of the outer jacket surface of at least some of the drying cylinders with a heat insulating foil.
Claim 3
Dependent Claim
34 words
The method of claim 1, wherein the width of the areas of the cylinder jackets covered with the heat insulating foil is 0.8 to 2.0 m, depending on the temperature of the cylinder covered.
Claim 4
Dependent Claim
20 words
The method of claim 1, wherein the foil consists of a glass fiber fabric covered on both sides with polytetrafluoroethylene.
Claim 5
Dependent Claim
33 words
The method of claim 1, wherein the foil consists of 40% glass fiber fabric and of 60% of polytetrafluoroethylene, the thermal conductivity of the foil thus being 0.27 to 0.28 Kcal/hr m° C.
Claim 6
Dependent Claim
16 words
The method of claim 4, wherein the thickness of the foil is 0.15 to 0.3 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |