Patent US5897634A successfully refreshed from Google Patents.
Patent US3724094A successfully refreshed from Google Patents.
US3724094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drying drum
Assignee: Kimberly Clark Corp
•
Filing: 1971-02-16
•
Granted: 1973-04-03
•
Expires: 1991-02-16
Abstract
Abstract A rotatably mounted cylindrical drier drum having a steam supply connection for directing steam into the drum and a condensate removal connection for removing condensate out of the drum, the drum being provided with a plurality of bars extending lengthwise of the drum and disposed on the internal surface of the drum for giving turbulence to the condensate in the drum, with the bars being spaced from each other from a spacing of 2.5 inches to a spacing of 7.4 inches with each of said spacings being multiplied by square root d/2.2, where d is the internal diameter of the drum in feet.
Inventors
- 👤 D Appel
- 👤 S Hong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:05
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/14; F26B13/18; F26B13/183; D; D21; D21F; D21F5/00; D21F5/02; D21F5/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
129 words
A hollow cylindrical drier drum for operation at peripheral speeds of 1,300 feet per minute or more having journals for rotatably mounting the drum, a steam supply connection for directing steam into the drum, a condensate removal connection for removing condensate out of the drum, and a plurality of bars extending lengthwise of the drum and disposed on the inside surface of the drum for giving turbulence to the condensate in the drum, said bars being spaced from each other by a peripheral distance in the range of 1.1 square root d inches to 3.4 square root d inches where d is the internal diameter of the drum in feet, the spacing of said bars being such that condensate sloshing between bars in the rotation of the drum resonates.
Claim 2
Dependent Claim
129 words
A hollow cylindrical drier drum for operation at peripheral speeds of 1,300 feet per minute or more having journals for rotatably mounting the drum, a steam supply connection for directing steam into the drum, a condensate removal connection for removing condensate out of the drum, and a plurality of bars extending lengthwise of the drum and disposed on the inside surface of the drum for giving turbulence to the condensate in the drum, said bars being spaced from each other by a peripheral distance in the range of 1.1 square root d inches to 3.4 square root d inches where d is the internal diameter of the drum in feet, the spacing of said bars being such that condensate sloshing between bars in the rotation of the drum resonates.
Claim 3
Dependent Claim
23 words
A hollow cylindrical drier drum as set forth in claim 1, the height of said bars being between 1.5 millimeters and 22.5 millimeters.
Claim 4
Dependent Claim
23 words
A hollow cylindrical drier drum as set forth in claim 1, the height of said bars being between 2 millimeters and 9 millimeters.
Claim 5
Dependent Claim
18 words
A hollow cylindrical drier drum as set forth in claim 1, said bars being rectangular in cross section.
Claim 6
Dependent Claim
33 words
A hollow cylindrical drier drum as set forth in claim 1, said bars being integrally separate from the drum and being fixed to the inside surface of the drum by means of screws.
Claim 7
Dependent Claim
40 words
A hollow cylindrical drier drum as set forth in claim 1, said bars being integrally separate from the drum and fixed on the inner drum surface and each bar having an unbroken surface in contact with the inner drum surface.
Claim 8
Dependent Claim
123 words
A hollow cylindrical drier drum having journals for rotatably mounting the drum, a steam supply connection for directing steam into the drum, a condensate removal connection for removing condensate out of the drum, means for maintaining a predetermined average thickness of rimming condensate in the drum, and a plurality of bars extending lengthwise of the drum and disposed on the inside surface of the drum for giving turbulence to the condensate in the drum, said bars being spaced from each other by a distance determined by the following formula: a (1 + or -0.25) pi Square Root Rh, where a is the spacing between adjacent bars, R is the inside Radius of the drum and h is the average depth of the condensate.
Claim 9
Dependent Claim
123 words
A hollow cylindrical drier drum having journals for rotatably mounting the drum, a steam supply connection for directing steam into the drum, a condensate removal connection for removing condensate out of the drum, means for maintaining a predetermined average thickness of rimming condensate in the drum, and a plurality of bars extending lengthwise of the drum and disposed on the inside surface of the drum for giving turbulence to the condensate in the drum, said bars being spaced from each other by a distance determined by the following formula: a (1 + or -0.25) pi Square Root Rh, where a is the spacing between adjacent bars, R is the inside Radius of the drum and h is the average depth of the condensate.
Claim 10
Dependent Claim
23 words
A hollow cylindrical drier drum as set forth in claim 7, the height of said bars being between 1.5 millimeters and 22.5 millimeters.
Claim 11
Dependent Claim
23 words
A hollow cylindrical drier drum as set forth in claim 7, the height of said bars being between 2 millimeters and 9 millimeters.
Claim 12
Dependent Claim
18 words
A hollow cylindrical drier drum as set forth in claim 7, said bars being rectangular in cross section.
Claim 13
Dependent Claim
33 words
A hollow cylindrical drier drum as set forth in claim 7, said bars being integrally separate from the drum and being fixed to the inside surface of the drum by means of screws.
Claim 14
Dependent Claim
39 words
A hollow cylindrical drum DRUM as set forth in claim 7, said bars being integrally separate from the drum and fixed surface the inner drum surface and each having an unbroken SURFACE in contact with the inner drum surface.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |