US4579280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for heating the surface of a substrate using a hot gas jet, particularly employing simultaneous feed of a coating substance for use in the flame spraying process, and burner for carrying out the process
Assignee: Akzo NV
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Filing: 1985-02-12
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Granted: 1986-04-01
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Expires: 2005-02-12
Abstract
Abstract The invention relates to a process for heating the surface of a substrate and to a burner particularly as part of a spray gun suitable for carrying out the process of flame spraying. In order to improve flame stability and to increase the output, compressed air is supplied using annular guide plates arranged in cascade fashion, one above the other and one behind the other in various planes in the direction of the jet. As a result of this, kinetic energy is introduced into the flow of hot gases as the air volume increases, so that almost complete combustion of the hot gases can be achieved at relatively low end temperatures. The drop-off in temperature of the hot gases in the direction of flow starting from the mouth of the burner is relatively small. Consequently, it is also possible to heat substrates uniformly which, as a result of their particular shape, have a varying spacing from the mouth of the burner. Using the burner, it is even possible to heat shrink films used for packaging objects without over-heating, leading to local destruction of the material, occurring.
Inventors
- 👤 Felix von Ruhling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/20; B05B7/201; B05B7/205
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
104 words
A process for heating a substrate, said process comprising the steps of igniting an inflammable gas-air mixture for forming hot combustion gases within an annular channel; accelerating the hot combustion gases by introducing a first pumping jet of compressed air into said hot combustion gases and further accelerating the hot gases by introducing at least one other pumping jet of compressed air into said gases at a location downstream from the point of introduction of the first jet of compressed air, the separate steps of accelerating the hot combustion gases being carried out while simultaneously introducing combustion air for making the inflammable gas-air mixture.
Claim 2
Dependent Claim
104 words
A process for heating a substrate, said process comprising the steps of igniting an inflammable gas-air mixture for forming hot combustion gases within an annular channel; accelerating the hot combustion gases by introducing a first pumping jet of compressed air into said hot combustion gases and further accelerating the hot gases by introducing at least one other pumping jet of compressed air into said gases at a location downstream from the point of introduction of the first jet of compressed air, the separate steps of accelerating the hot combustion gases being carried out while simultaneously introducing combustion air for making the inflammable gas-air mixture.
Claim 3
Dependent Claim
21 words
The process of claim 1 including the step of discharging hot combustion gases in the direction of the first pumping jet.
Claim 4
Dependent Claim
19 words
The process of claim 2 including the step of discharging hot combustion gases and air in a cascade-like arrangement.
Claim 5
Dependent Claim
20 words
The process of claim 2 including the step of applying coating particles simultaneously to the substrate surface during flame spraying.
Claim 6
Dependent Claim
118 words
A burner for heating a substrate, which comprises an annular guide, a combustion gas nozzle, and first and second compressed air nozzles, said annular guide surrounding the first compressed air nozzle and spaced therefrom forming an annular channel with air inlets, the combustion gas nozzle disposed so as to discharge hot combustion gases within said annular channel, the first compressed air nozzle accelerating the hot combustion gases by introducing a first pumping jet of compressed air into said gases, and the second compressed air nozzle accelerating the hot combustion gases further by introducing a second pumping jet of compressed air at a location downstream from the point of introduction of compressed air from the first compressed air nozzle.
Claim 7
Dependent Claim
118 words
A burner for heating a substrate, which comprises an annular guide, a combustion gas nozzle, and first and second compressed air nozzles, said annular guide surrounding the first compressed air nozzle and spaced therefrom forming an annular channel with air inlets, the combustion gas nozzle disposed so as to discharge hot combustion gases within said annular channel, the first compressed air nozzle accelerating the hot combustion gases by introducing a first pumping jet of compressed air into said gases, and the second compressed air nozzle accelerating the hot combustion gases further by introducing a second pumping jet of compressed air at a location downstream from the point of introduction of compressed air from the first compressed air nozzle.
Claim 8
Dependent Claim
18 words
The burner of claim 5 including means for discharging a coating material onto the surface of the substrate.
Claim 9
Dependent Claim
21 words
The burner of claim 6 wherein the annular guide is comprised of multiple telescoping annular guide plates with rearward air inlets.
Claim 10
Dependent Claim
23 words
The burner of claim 7 wherein the first and second compressed air nozzles are arranged for discharging compressed air at axially displaced planes.
Claim 11
Dependent Claim
13 words
The burner of claim 8 wherein the combustion gas nozzle is arranged concentrically.
Claim 12
Dependent Claim
27 words
The burner of claim 7 including spaced first and second annular guide plates arranged concentrically forming a further annular channel in which the second air nozzle projects.
Claim 13
Dependent Claim
18 words
The burner of claim 10 including means for applying a gaseous medium onto the surface of the substrate.
Claim 14
Dependent Claim
18 words
The burner of claim 10 including means for applying a liquid medium onto the surface of the substrate.
Claim 15
Dependent Claim
132 words
A burner for heating a substrate surface, which comprises a high pressure nozzle, a first annular guide surrounding said nozzle and spaced therefrom forming a first annular channel with rearward air inlets, said first annular channel including a first compressed air inlet, said burner having at least one further annular guide surrounding the first annular guide in spaced relationship forming a second annular channel having rearward air inlets, the second annular channel including a second compressed air inlet and a combustion gas nozzle for generating hot combustion gases, the compressed air from the first compressed air inlet in the first annular channel being introduced into the hot combustion gases at a location downstream from the point of introduction of compressed air from the second compressed air inlet in the second annular channel.
Claim 16
Dependent Claim
132 words
A burner for heating a substrate surface, which comprises a high pressure nozzle, a first annular guide surrounding said nozzle and spaced therefrom forming a first annular channel with rearward air inlets, said first annular channel including a first compressed air inlet, said burner having at least one further annular guide surrounding the first annular guide in spaced relationship forming a second annular channel having rearward air inlets, the second annular channel including a second compressed air inlet and a combustion gas nozzle for generating hot combustion gases, the compressed air from the first compressed air inlet in the first annular channel being introduced into the hot combustion gases at a location downstream from the point of introduction of compressed air from the second compressed air inlet in the second annular channel.
Claim 17
Dependent Claim
22 words
The burner of claim 13 wherein the rearward air inlets include throttling means for regulating the flow of air into the burner.
Claim 18
Dependent Claim
12 words
The burner of claim 14 wherein the throttling means comprises inclined vanes.
Claim 19
Dependent Claim
13 words
The burner of claim 13 wherein the throttling means comprises a perforated disc.
Claim 20
Dependent Claim
18 words
The burner of claim 13 including means for supplying a coating material onto the surface of the substrate.
Claim 21
Dependent Claim
140 words
A burner for heating a substrate surface, which comprises nozzle means for discharging coating material onto the substrate, a first annular guide surrounding said nozzle means and spaced therefrom forming an inner annular channel with a first compressed air inlet and first conduit means for supplying the compressed air to said first compressed air inlet, said burner having at least one further annular guide surrounding the first annular guide in spaced relationship forming an outer annular channel having a second compressed air inlet with second conduit means for supplying compressed air to said second compressed air inlet, the outer annular channel having a combustion gas nozzle for generating hot combustion gases, means for interconnecting the inner and outer annular channels such that hot combustion gases generated in the outer annular channel exit the burner only from the inner annular channel.
Claim 22
Dependent Claim
140 words
A burner for heating a substrate surface, which comprises nozzle means for discharging coating material onto the substrate, a first annular guide surrounding said nozzle means and spaced therefrom forming an inner annular channel with a first compressed air inlet and first conduit means for supplying the compressed air to said first compressed air inlet, said burner having at least one further annular guide surrounding the first annular guide in spaced relationship forming an outer annular channel having a second compressed air inlet with second conduit means for supplying compressed air to said second compressed air inlet, the outer annular channel having a combustion gas nozzle for generating hot combustion gases, means for interconnecting the inner and outer annular channels such that hot combustion gases generated in the outer annular channel exit the burner only from the inner annular channel.
Claim 23
Dependent Claim
18 words
The burner of claim 18 including means for supplying a coating material onto the surface of the substrate.
Claim 24
Dependent Claim
26 words
The burner of claim 19 wherein the means for interconnecting includes an annular plate closing the forward end of the burner except for a central opening.
Claim 25
Dependent Claim
17 words
The burner of claim 20 in combination with means for discharging a medium for cleaning the substrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |