Patent US3552484A successfully refreshed from Google Patents.
US3552484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer apparatus with rotating drum
Assignee: AT&T Inc
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Filing: 1968-10-01
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Granted: 1971-01-05
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Expires: 1988-10-01
Abstract
Abstract A water-cooled, chilling roller drum for absorbing heat from a sheetlike object passing around the roll and wherein the coldest of the cooling water is maintained in contact with the inner surface of the drum by centrifugal force. As the water is heated, it is displaced by cooler, heavier water and moves toward the axis of the rotating drum and is withdrawn from the drum through an exit port that is substantially coaxial with the drum.
Inventors
- 👤 James Kral Jr
- 👤 John G Meyer
- 👤 James F Stoltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:05
CPC Classifications
F; F28; F28D; F28D11/00; F28D11/02; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/156; Y10S165/159
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
316 words
Heat transfer apparatus for cooling continuous sheetlike material, which comprises: a rotatable drum having an annular interior chamber which is relatively free of obstructions to the free laminar flow of a cooling liquid therein and which is defined in part by a relatively smooth inner cylindrical surface and said drum, the inner cylindrical surface being engageable by the cooling liquid and said drum also including a relatively smooth outer surface engageable by the sheetlike material to be cooled; drive means for rotating said drum about its axis of rotation so as to impart a significant centrifugal force to cooling liquid in the annular interior chamber of said drums; means for continuously introducing a thermally expansible cooling liquid of a relatively cool temperature into the annular interior chamber of said drum so as to maintain the chamber substantially full of the cooling liquid; a frustoconically-shaped defector projecting into the annular interior chamber of said drum so as to guide the Relatively cool cooling liquid from an entrance port of said cooling liquid introducing mean into engagement with the inner cylindrical surface of said drum and such that heat is transferred from the sheetlike material and through the drum into the cooling liquid to cause the cooling liquid to expand and to become higher in weight, whereby the cooling liquid initially is maintained adjacent the inner cylindrical surface of said drum by centrifugal force and subsequently is displaced by succeeding relatively colder and heavier cooling liquid radially inward toward the axis of rotation of said drum and means for continuously withdrawing the inwardly displaced, warmed cooling liquid from the annular interior chamber of said drum, said frustoconically-shaped deflector being coaxial with the axis of rotation of said drum and having its smallest portion positioned about an exit port of said cooling liquid withdrawing means between the exit port and the entrance port of said cooling liquid introducing means.
Claim 2
Dependent Claim
316 words
Heat transfer apparatus for cooling continuous sheetlike material, which comprises: a rotatable drum having an annular interior chamber which is relatively free of obstructions to the free laminar flow of a cooling liquid therein and which is defined in part by a relatively smooth inner cylindrical surface and said drum, the inner cylindrical surface being engageable by the cooling liquid and said drum also including a relatively smooth outer surface engageable by the sheetlike material to be cooled; drive means for rotating said drum about its axis of rotation so as to impart a significant centrifugal force to cooling liquid in the annular interior chamber of said drums; means for continuously introducing a thermally expansible cooling liquid of a relatively cool temperature into the annular interior chamber of said drum so as to maintain the chamber substantially full of the cooling liquid; a frustoconically-shaped defector projecting into the annular interior chamber of said drum so as to guide the Relatively cool cooling liquid from an entrance port of said cooling liquid introducing mean into engagement with the inner cylindrical surface of said drum and such that heat is transferred from the sheetlike material and through the drum into the cooling liquid to cause the cooling liquid to expand and to become higher in weight, whereby the cooling liquid initially is maintained adjacent the inner cylindrical surface of said drum by centrifugal force and subsequently is displaced by succeeding relatively colder and heavier cooling liquid radially inward toward the axis of rotation of said drum and means for continuously withdrawing the inwardly displaced, warmed cooling liquid from the annular interior chamber of said drum, said frustoconically-shaped deflector being coaxial with the axis of rotation of said drum and having its smallest portion positioned about an exit port of said cooling liquid withdrawing means between the exit port and the entrance port of said cooling liquid introducing means.
References 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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |