US3629952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airfoil web dryer
Assignee: Overly Inc
•
Filing: 1970-11-16
•
Granted: 1971-12-28
•
Expires: 1990-11-16
Abstract
Abstract An airfoil nozzle is disposed adjacent the moving web to be dried and is constructed with a substantially flat planular guide surface trailing the nozzle, facing the web and substantially parallel thereto.
Inventors
- 👤 Wm F Overly
- 👤 Kenneth J Pagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:19
CPC Classifications
B; B41; B41F; B41F23/00; B41F23/04; B41F23/0403; B41F23/0423; B41F23/0426; D; D21; D21F; D21F5/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
An airfoil web dryer comprising one or more airfoil nozzles disposed on at least one side of a moving web with the nozzle slot disposed to discharge the air at an air velocity in excess of 3,300 feet per minute, with a Reynolds'' number of from about 4,000 to 8,000 and said nozzle having a substantially flat face generally parallel to the web to provide turbulent flow of the air between the face and the web, and an L/D ratio within the range of about 40 to 90 where L is the dimension of the flat face in the direction of air flow and D is the width of tHe nozzle slot.
Claim 2
Dependent Claim
112 words
An airfoil web dryer comprising one or more airfoil nozzles disposed on at least one side of a moving web with the nozzle slot disposed to discharge the air at an air velocity in excess of 3,300 feet per minute, with a Reynolds'' number of from about 4,000 to 8,000 and said nozzle having a substantially flat face generally parallel to the web to provide turbulent flow of the air between the face and the web, and an L/D ratio within the range of about 40 to 90 where L is the dimension of the flat face in the direction of air flow and D is the width of tHe nozzle slot.
Claim 3
Dependent Claim
44 words
The construction of claim 1 wherein the L/D ratio is approximately 60 and the air velocity is approximately 14,000 feet per minute as it enters the space between said face and the web, with a Reynolds'' number of approximately from 5,000 to 7, 000.
References Cited (Backward Citations)
US3559301A
Cited
US3549070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |