US3744963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment
Assignee: TRUSTEE FOR BLU SURF THERMO
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Filing: 1971-11-19
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Granted: 1973-07-10
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Expires: 1991-11-19
Abstract
Abstract Apparatus for high-speed heat treatment of web stock, particularly coated metallic stock as supplied from a coil, moved in catenary configuration through the heat-treatment apparatus. The apparatus employs a plurality of high-velocity, combustion burner assemblies specially arranged in a plurality of heating zones through which the strip is moved. A plurality of heating sections using these burners usually includes a high-velocity section and a dynamic flow section. Frequently included is a flash-off section to remove volatiles. Special air curtains at the ends of the apparatus serve to close the entry and exit and also remove the cold incoming boundary layer from the stock thereby allowing more efficient operation, and the hot outgoing boundary layer to assure rapid cooling.
Inventors
- 👤 C Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:10
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B23/00; F26B23/02; Y; Y10; Y10S; Y10S266/00; Y10S266/905
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
325 words
Apparatus for high-speed heat treatment of a coating on a continuous web comprising: a first heating chamber; a second heating chamber positioned downstream of said first heating chamber, each of said heating chambers having side, bottom, and top walls forming an elongated tunnel having an inlet end and an exit end for the web; exhaust means positioned adjacent said first heating chamber at the inlet end thereof for removing volatile fumes from the coating on the web; first hot gas burner means positioned in said first heating chamber adjacent said walls for generating a continuous flow of heated gases about the upper and lower surfaces of the web, said hot gas burner means including a plurality of individual burner assemblies, each formed of a housing having a gas inlet means connected thereto and having means thereon forming a combustion surface; second hot gas burner means positioned in said second chamber adjacent said walls for directing a high velocity jet of heated gases toward the upper and lower surfaces of the web, said second hot gas burner means including a plurality of individual burner assemblies each having enclosure means forming a hot-gas pressure chamber, a restricted orifice outlet from said pressure chamber to allow hot gaseous flow from said pressure chamber into said second heating chamber while retaining a positive pressure in said pressure chamber, a combustion burner having a burner surface in said enclosure means and gas inlet means connected thereto, said hot gas pressure pressure chamber and said restricted nozzle outlet causing a high velocity flow of hot combustion gases in a jet stream from said outlet toward the surface of the web; manifold means connected to said inlet means of each of said first and said second hot has burner means to supply a combustible mixture thereto; and air curtain means positioned at one of said inlet and exit ends to remove the gaseous boundary layer on said web passing through said chamber.
Claim 2
Dependent Claim
325 words
Apparatus for high-speed heat treatment of a coating on a continuous web comprising: a first heating chamber; a second heating chamber positioned downstream of said first heating chamber, each of said heating chambers having side, bottom, and top walls forming an elongated tunnel having an inlet end and an exit end for the web; exhaust means positioned adjacent said first heating chamber at the inlet end thereof for removing volatile fumes from the coating on the web; first hot gas burner means positioned in said first heating chamber adjacent said walls for generating a continuous flow of heated gases about the upper and lower surfaces of the web, said hot gas burner means including a plurality of individual burner assemblies, each formed of a housing having a gas inlet means connected thereto and having means thereon forming a combustion surface; second hot gas burner means positioned in said second chamber adjacent said walls for directing a high velocity jet of heated gases toward the upper and lower surfaces of the web, said second hot gas burner means including a plurality of individual burner assemblies each having enclosure means forming a hot-gas pressure chamber, a restricted orifice outlet from said pressure chamber to allow hot gaseous flow from said pressure chamber into said second heating chamber while retaining a positive pressure in said pressure chamber, a combustion burner having a burner surface in said enclosure means and gas inlet means connected thereto, said hot gas pressure pressure chamber and said restricted nozzle outlet causing a high velocity flow of hot combustion gases in a jet stream from said outlet toward the surface of the web; manifold means connected to said inlet means of each of said first and said second hot has burner means to supply a combustible mixture thereto; and air curtain means positioned at one of said inlet and exit ends to remove the gaseous boundary layer on said web passing through said chamber.
Claim 3
Dependent Claim
95 words
The heat-treatment apparatus as defined in claim 1 wherein said exhaust means includes a blower, said blower having an inlet and an outlet to remove the volatile fumes from said exhaust means, said outlet connected to a stack conduit means having a discharge opening therein; burner means in said stack conduit having combustible gas mixture inlet means thereto and having a hot-gas discharge surface area oriented toward said discharge end of said stack to create a hot-gas flow zone therein for continuous ignition and combustion of said volatile fumes before passage out of said stack.
Claim 4
Dependent Claim
65 words
The heat-treatment apparatus as defined in claim 1 wherein said air-curtain means is positioned at the inlet end of said first heating chamber er and at the exit end of said second heating chamber to remove the boundary layer of ambient air at the entrance end of said heat treatment apparatus and to remove the boundary layer of heated air at the exit end thereof.
Claim 5
Dependent Claim
95 words
The heat-treatment apparatus as defined in claim 3 wherein said exhaust means includes a blower, said blower having an inlet and an outlet to remove the volatile fumes from said exhaust means, said outlet connected to a stack conduit means having a discharge opening therein; burner means in said stack conduit having combustible gas mixture inlet means thereto and having a hot-gas discharge surface area oriented toward said discharge end of said stack to create a hot-gas flow zone therein for continuous ignition and combustion of said volatile fumes before passage out of said stack.
Claim 6
Dependent Claim
46 words
The apparatus as defined in claim 3 wherein said air-curtain means is positioned at an acute angle with respect to said web and said inlet and exit ends to direct a high-velocity stream of air toward said web to peel the boundary layer from said web.
Claim 7
Dependent Claim
65 words
The apparatus as defined in claim 5 wherein said air-curtain means is positioned adjacent an upper and lower portion of said ends, said high-velocity stream of air is directed toward the upper and lower surfaces of said web at an angle with respect thereto to peel the boundary layer therefrom and to close said ends to retain the heated gases in said first and second.
Claim 8
Dependent Claim
44 words
The heat-treatment apparatus as defined in claim 5 wherein said exhaust means further includes a plurality of air nozzles arranged above and below said web to direct a continuous jet of pressurized air about said web to accelerate the removal of volatile fumes therefrom.
Claim 9
Dependent Claim
67 words
The heat-treatment apparatus as defined in claim 1 wherein said first heating chamber includes a plurality of elongated spaced baffle elements arranged between said hot-gas burners and said web above and below said web; pressurized air manifold means adjacent said baffle members to eject pressurized air into said first heating chamber to thereby cause a dynamic flow of heated gases in said first chamber about said web.
Claim 10
Dependent Claim
175 words
Apparatus for high-speed heat treatment of continuously moving coated web stock comprising: a first heating chamber; a second heating chamber; an exhaust chamber positioned adjacent said first heating chamber, each of said chambers having side, bottom and top walls forming an elongated tunnel having an inlet end and an exit end for said web stock; hot-gas burner means positioned in each of said chambers adjacent said top and said bottom walls for directing a continuous flow of heated gases about the upper and lower surfaces of said web; each of said hot-gas burner means including a plurality of individual burner assemblies, each formed of a housing having a gas inlet means connected thereto, an open side covered by a thin porous combustion layer forming a combustion surface; manifold means connecting each of said individual burner assemblies to a combustible mixture of gases; and air-curtain means positioned at said inlet end and said outlet end of said heating chambers to remove the boundary layer from said web passing through said chambers and to close said ends.
Claim 11
Dependent Claim
175 words
Apparatus for high-speed heat treatment of continuously moving coated web stock comprising: a first heating chamber; a second heating chamber; an exhaust chamber positioned adjacent said first heating chamber, each of said chambers having side, bottom and top walls forming an elongated tunnel having an inlet end and an exit end for said web stock; hot-gas burner means positioned in each of said chambers adjacent said top and said bottom walls for directing a continuous flow of heated gases about the upper and lower surfaces of said web; each of said hot-gas burner means including a plurality of individual burner assemblies, each formed of a housing having a gas inlet means connected thereto, an open side covered by a thin porous combustion layer forming a combustion surface; manifold means connecting each of said individual burner assemblies to a combustible mixture of gases; and air-curtain means positioned at said inlet end and said outlet end of said heating chambers to remove the boundary layer from said web passing through said chambers and to close said ends.
Claim 12
Dependent Claim
52 words
The apparatus as defined in claim 9 wherein said first heating chamber includes dynamic-flow means cooperating with said burner means to provide a dynamic flow of heated gases about said web and wherein said burners in said second chamber are adapted to direct a high-velocity jet of heated gases toward said surfaces.
Claim 13
Dependent Claim
87 words
The heat-treatment apparatus as defined in claim 9 wherein said exhaust means includes a blower, said blower having an inlet and an outlet to remove the volatile fumes from said exhaust means; stack conduit means having a discharge opening therein, said blower means connected to said stack conduit means; burner means in said stack conduit having a hot-gas discharge surface thereon oriented toward said discharge to create a hot-gas flow zone therein for continuous ignition and combustion of said volatile fumes before passage out of said stack.
Claim 14
Dependent Claim
47 words
The heat-treatment apparatus as defined in claim 11 wherein said exhaust means further includes a plurality of air nozzles arranged above and below said web to direct a continuous jet of pressurized air about the surface of the web to accelerate the removal of volatile fumes therefrom.
Claim 15
Dependent Claim
46 words
The apparatus as defined in claim 9 wherein said air-curtain means is positioned at an acute angle with respect to the web and said inlet and outlet ends to direct a high-velocity stream of air toward the web to peel the boundary layer from the web.
Claim 16
Dependent Claim
68 words
The apparatus as defined in claim 13 wherein said air-curtain means is positioned adjacent an upper and lower portion of said ends, said high-velocity stream of air is directed toward the upper and lower surfaces of the web at an angle with respect thereto to peel the boundary layer therefrom and to close said ends to retain the heated gases in said first and said second heating chambers.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |