Patent US3832129A successfully refreshed from Google Patents.
US3832129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil annealing furnaces
Assignee: Wellman Incandescent Furnace Co Ltd
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Filing: 1973-04-05
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Granted: 1974-08-27
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Expires: 1993-04-05
Abstract
Abstract The invention provides a coil annealing furnace in which atmosphere is circulated out of a cover enclosing the coils and via an external circuit before returning to the cover, in which a heat exchanger is located in the external circuit but is physically movable so that when moved out of the circuit there is no impediment to free circulation through the circuit such as is inevitably provided when the heat exchanger is in the circuit, and with a seal between the cover and furnace structure comprising a compressed rubber ring which is watercooled, so as to prevent seal failure through pressure fluctations when the heat exchanger is moved into the circuit.
Inventors
- 👤 A Derbyshire
- 👤 K Ivins
- 👤 E Whetton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:05
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
A coil annealing furnace including a base member for supporting coils of sheet metal, a removable cover member having an open bottom and supported by the base member to form an enclosure for said sheet metal coils, a chamber located beneath the base member and in communication with said enclosure, means located in the chamber for circulating reducing or neutral atmosphere through said chamber and the enclosure, and a heat exchanger mounted beneath the base member and selectively movable into and out of the chamber, characterised in that the cover member is supported by the base member through a resilientlydeformable seal ring compressed between substantially parallel confronting annular webs of the cover member and the base member, each of said annular webs forming a wall of a coolant passageway.
Claim 2
Dependent Claim
129 words
A coil annealing furnace including a base member for supporting coils of sheet metal, a removable cover member having an open bottom and supported by the base member to form an enclosure for said sheet metal coils, a chamber located beneath the base member and in communication with said enclosure, means located in the chamber for circulating reducing or neutral atmosphere through said chamber and the enclosure, and a heat exchanger mounted beneath the base member and selectively movable into and out of the chamber, characterised in that the cover member is supported by the base member through a resilientlydeformable seal ring compressed between substantially parallel confronting annular webs of the cover member and the base member, each of said annular webs forming a wall of a coolant passageway.
Claim 3
Dependent Claim
21 words
A coil annealing furnace according to claim 1 wherein said seal ring is attached to said web of the cover member.
Claim 4
Dependent Claim
156 words
A coil annealing furnace including a base member for supporting coils of sheet metal, a removable cover member having an open bottom and supported on said base member to form an enclosure for said sheet metal coils, and a sealing assembly provided between the cover member and the base member, said assembly comprising: a. first and second confronting annular surfaces presented by the cover member and the base member respectively; b. an annular resiliently-deformable seal located between said confronting surfaces; c. a first annular coolant passageway provided on the cover member, one of the walls which define said first passageway providing said first confronting surface; and d. a second annular coolant passageway provided on the base member, one of the walls which define said second passageway providing said second confronting surface; the inner periphery of the gap between said first and second confronting surfaces being boUnded by an annular portion of one of said coolant passageways.
Claim 5
Dependent Claim
156 words
A coil annealing furnace including a base member for supporting coils of sheet metal, a removable cover member having an open bottom and supported on said base member to form an enclosure for said sheet metal coils, and a sealing assembly provided between the cover member and the base member, said assembly comprising: a. first and second confronting annular surfaces presented by the cover member and the base member respectively; b. an annular resiliently-deformable seal located between said confronting surfaces; c. a first annular coolant passageway provided on the cover member, one of the walls which define said first passageway providing said first confronting surface; and d. a second annular coolant passageway provided on the base member, one of the walls which define said second passageway providing said second confronting surface; the inner periphery of the gap between said first and second confronting surfaces being boUnded by an annular portion of one of said coolant passageways.
Claim 6
Dependent Claim
33 words
A coil annealing furnace according to claim 3 wherein the inner periphery of the gap between said first and second confronting surface is bounded by an annular portion of the first coolant passageway.
Claim 7
Dependent Claim
15 words
A coil annealing furnace according to claim 4 wherein said confronting surfaces are both planar.
Claim 8
Dependent Claim
18 words
A coil annealing furnace according to claim 5 wherein said seal is attached to said first confronting surface.
Claim 9
Dependent Claim
59 words
A coil annealing furnace according to claim 4 wherein said first coolant passageway is T-shaped in radial section and is arranged with the stem portion thereof located horizontally in overlying relation with said second confronting surface, and with the cross limbs thereof extending vertically so that one cross limb depends downwardly to bound the gap between said confronting surfaces.
Claim 10
Dependent Claim
77 words
A coil annealing furnace according to claim 7 wherein the other cross limb of said first coolant passageway bounds the inner side of a channel extending around the outer periphery of the cover member, said channel containing a mass of sand, and wherein a second outer cover member having an open bottom is provided and is arranged with its bottom periphery embedded in the sand contained in said channel to sealingly enclose the first mentioned cover member.
Claim 11
Dependent Claim
54 words
A coil annealing furnace according to claim 3 further including a plurality of releasable clamping devices located at spaced positions around the periphery of the base and arranged to act between the cover member and the base member so as to draw said confronting surfaces towards one another to apply compression to said seal.
Claim 12
Dependent Claim
58 words
A coil annealing furnace according to claim 3 including a chamber located beneath said base member and in communication with said enclosure, means located in the chamber for circulating a reducing or neutral atmosphere through said chamber and the enclosure, and a heat exchanger mounted beneath the base member and selectively movable into and out of the chamber.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |