EP0051751A2 - Burner with a nozzle having a wide slot for generating a hot gas stream - Google Patents
Burner with a nozzle having a wide slot for generating a hot gas stream Download PDFInfo
- Publication number
- EP0051751A2 EP0051751A2 EP81108098A EP81108098A EP0051751A2 EP 0051751 A2 EP0051751 A2 EP 0051751A2 EP 81108098 A EP81108098 A EP 81108098A EP 81108098 A EP81108098 A EP 81108098A EP 0051751 A2 EP0051751 A2 EP 0051751A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner according
- slot die
- nozzle
- bars
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 239000002985 plastic film Substances 0.000 claims abstract description 6
- 229920006255 plastic film Polymers 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 239000000567 combustion gas Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 2
- 239000011343 solid material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract 2
- 241001156002 Anthonomus pomorum Species 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/74—Preventing flame lift-off
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
- F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
- F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet
Definitions
- the invention relates to a burner with a slot die for generating a hot gas flow, in particular for shrinking plastic film, with a combustion chamber upstream of the slot die, which has a cross-section tapering in the direction of the slot die and a cross-section opposite the slot die and extending essentially over the length of the slot die Has flame holder, to which the combustion gases are supplied in several partial streams from a pressure distribution chamber.
- Such burners are needed to shrink plastic films, e.g. in the form of hoods that are pulled onto a stack of goods on a pallet.
- the shrinking can be done with handheld devices, but also with stationary, automatically working systems.
- shrinking plastic film it is important that a uniform, flame-free hot gas flow is generated.
- Burners of the type described in the introduction are known (cf. e.g. DE-GM 18 90 208). With such burners there are always problems with regard to the stability of the flame, which often becomes so large that it emerges from the nozzle. This is especially true when a relatively high heating output is required. This is also associated with disturbing noises.
- the object of the invention is therefore to improve a burner of the type described in the introduction so that even at high power only a short flame is generated which does not emerge from the slot die. A low level of noise is also sought.
- the flame holder has a plurality of openings distributed over the outlet surface of the combustion gases and that in the combustion chamber directly on the flame holder two rods extending parallel to the slot die to form a main stream directed towards the slot die and two each at an angle Burner chamber walls of directed side streams are arranged.
- three combustion gas streams essentially parallel to one another and extending along the slot die, are generated, of which the central one is designed as the main stream, which is directly opposite the slot die and is directed towards the latter.
- the main stream is, however, the two side streams disturbed, because the secondary flows are directed against the sloping walls of the burner chamber and are deflected by the latter in the direction of the main flow. This creates turbulence, which leads to an intensive swirling of the combustion gases and thus preheating of the main gas flow, with the result that the combustion takes place on a short path between the outlet surface and the slot die, but in any case within the combustion chamber.
- Such square rods in turn form turbulence-forming interference cells, the turbulence generated by the square rods having a finer structure than the turbulence generated by deflecting the secondary flows on the oblique burner chamber walls.
- the distance between the rods should be set up in accordance with a ratio of approximately 1: 1 of the volume flows of the main flow and the sum of the secondary flows, because the mixture forced by turbulence then proceeds well.
- This effect can be further improved in that the height of the rods corresponds at least approximately to the width of the side streams at their point of exit.
- the exit surface of the combustion gases in the combustion chamber should be substantially flat. Accordingly, the exit surface can be formed by a screen, a perforated plate or preferably by parallel bars spaced apart from one another.
- the bars can be round bars, according to the preferred embodiment of the invention are aligned transversely to the longitudinal direction of the slot die.
- the burner 1 shown in the drawing with a slot nozzle 2 is used to generate a hot gas stream from combustion gases. It is used for shrinking plastic film, e.g. of shrink hoods drawn on a pallet stack.
- the basic structure of the burner 1 has a combustion chamber 3 connected upstream of the slot die 2, which has a cross section which tapers in the direction of the slot die 2, which cross section inclined walls 4, 5 are formed which on the one hand define the slot die 2 between them and which are connected on the other hand to a flame holder 6 opposite the slot die 2 which is arranged at the end of a pressure distribution chamber 7.
- the pressure distribution chamber 7 has a fan-shaped plan. It is connected to a mixture feed pipe 8 on the side opposite the flame holder 6. Distribution plates 9 are arranged in the pressure distribution chamber 7.
- the flame holder 6 extends in the illustrated embodiment over the entire length of the slot die 2.
- the flame holder 6 is formed by a plurality of parallel and spaced grating bars 10, which are aligned transversely to the longitudinal direction of the slot die 2.
- the bars 10 are made of spring steel with a diameter of approximately 3 mm and the mutual spacing of the bars 10 is approximately 0.5 mm.
- two square bars 11, 12 are arranged, which are aligned in the longitudinal direction of the slot die 2.
- the square bars 11, 12 define an average main flow 13 and on both sides thereof a secondary flow 14 or 15 of the combustion gases.
- the mutual distance between the square bars 11, 12 and their distance from the adjacent walls 4 and 5 is set up so that the volume flows of the main flow 13 and Sum of the secondary flows 14, 15 are essentially the same.
- the volume flows of the two secondary flows 14, 15 are essentially the same.
- the two secondary flows 14, 15 are directed towards the inclined walls 4 and 5 of the combustion chamber 3. Accordingly, the secondary flows 14, 15 are deflected by these walls 4 and 5 during operation, namely in the direction of the main flow 13. The deflection creates turbulence which disrupts the main flow. Further turbulence with a smaller structure occurs on the square bars 11, 12, behind which sides 16, 7 directed towards the slot die 2, dead water areas form. As a result, coarse and fine turbulences are generated, which produce an intensive mixing of the combustion gases carried in the main stream 13 or in the secondary streams 14, 15 and thus a short flame which always remains in the combustion chamber 3.
- the burner shown can be used both as a handheld device and in series with similar burners on an automatically operating system.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
Die Erfindung betrifft einen Brenner mit Breitschlitzdüse zur Erzeugung eines Heißgasstromes, insbesondere zum Schrumpfen von Kunststoffolie, mit einer der Breitschlitzdüse vorgeschalteten Brennkammer, die einen sich in Richtung auf die Breitschlitzdüse verjüngenden Querschnitt und einen der Breitschlitzdüse gegenüberliegenden, sich im wesentlichen über die Länge der Breitschlitzdüse erstreckenden Flammenhalter aufweist, dem die Verbrennungsgase in mehreren Teilströmen aus einer Druckverteilungskammer zugeführt werden.The invention relates to a burner with a slot die for generating a hot gas flow, in particular for shrinking plastic film, with a combustion chamber upstream of the slot die, which has a cross-section tapering in the direction of the slot die and a cross-section opposite the slot die and extending essentially over the length of the slot die Has flame holder, to which the combustion gases are supplied in several partial streams from a pressure distribution chamber.
Derartige Brenner benötigt man zum Einschrumpfen von Kunststoffolien, z.B. in Form von Hauben, die auf einen auf einer Palette befindlichen Gutstapel gezogen sind. Das Einschrumpfen kann mit Handgeräten, aber auch mit stationär installierten, automatisch arbeitenden Anlagen vorgenommen werden. Wichtig beim Schrumpfen von Kunststoffolie ist, daß ein gleichmäßiger flammenfreier Heißgasstrom erzeugt wird.Such burners are needed to shrink plastic films, e.g. in the form of hoods that are pulled onto a stack of goods on a pallet. The shrinking can be done with handheld devices, but also with stationary, automatically working systems. When shrinking plastic film, it is important that a uniform, flame-free hot gas flow is generated.
Brenner der eingangs beschriebenen Art sind bekannt (vgl. z.B. DE-GM 18 90 208). Bei derartigen Brennern ergeben sich immer wieder Probleme im Hinblick auf die Stabilität der Flamme, die häufig so groß wird, daß sie aus der Düse austritt. Das gilt insbesondere dann, wenn eine verhältnismäßig hohe Heizleistung verlangt wird. Verbunden damit sind auch störende Geräusche.Burners of the type described in the introduction are known (cf. e.g. DE-GM 18 90 208). With such burners there are always problems with regard to the stability of the flame, which often becomes so large that it emerges from the nozzle. This is especially true when a relatively high heating output is required. This is also associated with disturbing noises.
Aufgabe der Erfindung ist es deshalb, einen Brenner der eingangs beschriebenen Gattung so zu verbessern, daß auch bei hoher Leistung nur eine kurze Flamme erzeugt wird, die nicht aus der Breitschlitzdüse austritt. Angestrebt wird außerdem eine geringe Geräuschbildung.The object of the invention is therefore to improve a burner of the type described in the introduction so that even at high power only a short flame is generated which does not emerge from the slot die. A low level of noise is also sought.
Diese Aufgabe wird dadurch gelöst, daß der Flammenhalter eine Vielzahl von über die Austrittsfläche der Verbrennungsgase verteilten Öffnungen aufweist und daß in der Brennkammer unmittelbar auf dem Flammenhalter zwei sich parallel zur Breitschlitzdüse erstreckende Stäbe zur Bildung eines auf die Breitschlitzdüse gerichteten Hauptstrom und zweier jeweils auf die schrägen Brennerkammerwandungen gerichteter Nebenströme angeordnet sind.This object is achieved in that the flame holder has a plurality of openings distributed over the outlet surface of the combustion gases and that in the combustion chamber directly on the flame holder two rods extending parallel to the slot die to form a main stream directed towards the slot die and two each at an angle Burner chamber walls of directed side streams are arranged.
Bei dem erfindungsgemäßen Brenner werden drei im wesentlichen parallel zueinander und sich längs der Breitschlitzdüse erstreckende Verbrennungsgasströme erzeugt, von denen der mittlere als Hauptstrom ausgebildet ist, der der Breitschlitzdüse direkt gegenüberliegt und auf diese gerichtet ist. Der Hauptstrom wird aber durch die beiden Nebenströme gestört, weil die Nebenströme gegen die schrägen Brennerkammerwandungen gerichtet sind und von diesem in Richtung auf den Hauptstrom abgelenkt werden. Dabei entstehen Turbulenzen, die zu einer intensiven Verwirbelung der Verbrennungsgase und damit Vorheizung des Hauptgasstromes führen, mit dem Ergebnis, daß die Verbrennung auf einem kurzen Wege zwischen der Austrittsfläche und der Breitschlitzdüse, auf jeden Fall aber innerhalb der Brennkammer stattfindet.In the burner according to the invention, three combustion gas streams, essentially parallel to one another and extending along the slot die, are generated, of which the central one is designed as the main stream, which is directly opposite the slot die and is directed towards the latter. The main stream is, however, the two side streams disturbed, because the secondary flows are directed against the sloping walls of the burner chamber and are deflected by the latter in the direction of the main flow. This creates turbulence, which leads to an intensive swirling of the combustion gases and thus preheating of the main gas flow, with the result that the combustion takes place on a short path between the outlet surface and the slot die, but in any case within the combustion chamber.
Besonders günstige Ergebnisse werden dann erzielt, wenn die Stäbe aus Vierkantmaterial bestehen. Derartige Vierkantstäbe bilden ihrerseits turbulenzbildende Störzellen, wobei die von den Vierkantstäben erzeugten Turbulenzen eine feinere Struktur aufweisen als die durch Ablenkung der Nebenströme an den schrägen Brennerkammerwandungen erzeugten Turbulenzen.Particularly favorable results are achieved when the bars are made of square material. Such square rods in turn form turbulence-forming interference cells, the turbulence generated by the square rods having a finer structure than the turbulence generated by deflecting the secondary flows on the oblique burner chamber walls.
Nach bevorzugter Ausführungsform der Erfindung soll der Abstand der Stäbe entsprechend einem Verhältnis von ca. 1 : 1 der Volumenströme von Hauptstrom und Summe der Nebenströme eingerichtet sein, weil dann die durch Turbulenzen erzwungene Mischung gut abläuft. Dieser Effekt kann noch dadurch verbessert werden, daß die Höhe der Stäbe wenigstens annähernd der Breite der Nebenströme an ihrer Austrittsstelle entspricht.According to a preferred embodiment of the invention, the distance between the rods should be set up in accordance with a ratio of approximately 1: 1 of the volume flows of the main flow and the sum of the secondary flows, because the mixture forced by turbulence then proceeds well. This effect can be further improved in that the height of the rods corresponds at least approximately to the width of the side streams at their point of exit.
Die Austrittsfläche der Verbrennungsgase in der Verbrennungskammer sollte im wesentlichen eben sein. Dementsprechend kann die Austrittsfläche von einem Sieb, einem Lochblech oder vorzugsweise von parallel zueinander mit gegenseitigem Abstand angeordneten Gitterstäben gebildet sein. Die Gitterstäbe können Rundstäbe sein, die nach bevorzugter Ausführungsform der Erfindung quer zur Längsrichtung der Breitschlitzdüse ausgerichtet sind.The exit surface of the combustion gases in the combustion chamber should be substantially flat. Accordingly, the exit surface can be formed by a screen, a perforated plate or preferably by parallel bars spaced apart from one another. The bars can be round bars, according to the preferred embodiment of the invention are aligned transversely to the longitudinal direction of the slot die.
Werden Gitterstäbe und Vierkantstäbe aus Vollmaterial hergestellt, dann besitzt der aus diesen aufgebaute Flammenhalter auch eine hinreichende Temperaturbeständigkeit.If bars and square bars are made from solid material, then the flame holder constructed from them also has sufficient temperature resistance.
Im Folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert; es zeigen:
- Fig. 1 einen Längsschnitt durch einen Brenner mit Breitschlitzdüse, entsprechend einem Schnitt in Richtung I-I durch den Gegenstand nach Fig. 2,
- Fig. 2 einen Schnitt in Richtung II-II durch den Gegenstand nach Fig. 1,
- Fig. 3 einen Schnitt in Richtung III-III durch den Gegenstand nach Fig. 1.
- 1 shows a longitudinal section through a burner with a slot die, corresponding to a section in the direction II through the object according to FIG. 2,
- 2 shows a section in the direction II-II through the object according to FIG. 1,
- 3 shows a section in the direction III-III through the object according to FIG. 1.
Der in der Zeichnung dargestellte Brenner 1 mit Breitschlitzdüse 2 dient zur Erzeugung eines Heißgasstromes aus Verbrennungsgasen. Er wird eingesetzt beim Schrumpfen von Kunststoffolie, z.B. von Schrumpfhauben, die auf einem Palettenstapel gezogen sind.The burner 1 shown in the drawing with a slot nozzle 2 is used to generate a hot gas stream from combustion gases. It is used for shrinking plastic film, e.g. of shrink hoods drawn on a pallet stack.
Der Brenner 1 weist in seinem grundsätzlichen Aufbau eine der Breitschlitzdüse 2 vorgeschaltete Brennkammer 3 auf, die einen sich in Richtung auf die Breitschlitzdüse 2 verjüngenden Querschnitt hat, der von schräggestellten Wandungen 4,5 gebildet ist, die einerseits zwischen sich die Breitschlitzdüse 2 definieren und die andererseits an einen der Breitschlitzdüse 2 gegenüberliegenden Flammenhalter 6 angeschlossen sind, der am Ende einer Druckverteilungskammer 7 angeordnet ist. Die Druckverteilungskammer 7 weist in der in Figur 1 dargestellten Projektion einen fächerförmigen Grundriß auf. Sie ist an der dem Flammenhalter 6 gegenüberliegenden Seite an ein Gemischzuführungsrohr 8 angeschlossen. In der Druckverteilungskammer 7 sind Verteilerbleche 9 angeordnet.The basic structure of the burner 1 has a combustion chamber 3 connected upstream of the slot die 2, which has a cross section which tapers in the direction of the slot die 2, which cross section inclined walls 4, 5 are formed which on the one hand define the slot die 2 between them and which are connected on the other hand to a flame holder 6 opposite the slot die 2 which is arranged at the end of a pressure distribution chamber 7. In the projection shown in FIG. 1, the pressure distribution chamber 7 has a fan-shaped plan. It is connected to a mixture feed pipe 8 on the side opposite the flame holder 6. Distribution plates 9 are arranged in the pressure distribution chamber 7.
Der Flammenhalter 6 erstreckt sich beim dargestellten Ausführungsbeispiel über die gesamte Länge der Breitschlitzdüse 2. Der Flammenhalter 6 wird gebildet von einer Vielzahl parallel zueinander und mit Abstand angeordneter Gitterstäbe 10, die quer zur Längsrichtung der Breitschlitzdüse 2 ausgerichtet sind. Bei einem praktischen Ausführungsbeispiel bestehen die Gitterstäbe 10 aus Federstahl mit einem Durchmesser von ca. 3 mm und der gegenseitige Abstand der Gitterstäbe 10 beträgt ca. 0,5 mm.The flame holder 6 extends in the illustrated embodiment over the entire length of the slot die 2. The flame holder 6 is formed by a plurality of parallel and spaced
Unmittelbar oberhalb der Gitterstäbe 10 sind zwei Vierkantstäbe 11,12 angeordnet, die in Längsrichtung der Breitschlitzdüse 2 ausgerichtet sind. Die Vierkantstäbe 11,12 definieren einen mittleren Hauptstrom 13 und beidseits davon jeweils einen Nebenstrom 14 bzw. 15 der Verbrennungsgase. Der gegenseitige Abstand der Vierkantstäbe 11,12 und ihr Abstand von den benachbarten Wandungen 4 bzw. 5 ist so eingerichtet, daß die Volumenströme von Hauptstrom 13 und Summe der Nebenströme 14,15 im wesentlichen gleich sind. Außerdem sind auch die Volumenströme der beiden Nebenströme 14,15 im wesentlichen gleich.Immediately above the
Wie man insbesondere der Figur 3 entnimmt, sind die beiden Nebenströme 14,15 auf die schrägen Wandungen 4 bzw. 5 der Brennkammer 3 gerichtet. Dementsprechend werden die Nebenströme 14, 15 von diesen Wandungen 4 bzw. 5 während des Betriebes abgelenkt und zwar in Richtung auf den Hauptstrom 13. Durch die Ablenkung entstehen Turbulenzen, die den Hauptstrom stören. Weitere Turbulenzen mit kleinerer Struktur entstehen an den Vierkantstäben 11,12,hinter deren zur Breitschlitzdüse 2 gerichteten Seiten 16,17 sich Totwassergebiete ausbilden. Im Ergebnis werden grobe und feine Turbulenzen erzeugt, die eine intensive Durchmischung der im Hauptstrom 13 bzw. in den Nebenströmen 14,15 geführten Verbrennungsgase und damit eine kurze, stets in der Brennkammer 3 verbleibende Flamme erzeugen.As can be seen in particular from FIG. 3, the two
Der dargestellte Brenner kann sowohl als Handgerät als auch in Reihe mit gleichartigen Brennern an eine automatisch arbeitenden Anlage eingesetzt werden.The burner shown can be used both as a handheld device and in series with similar burners on an automatically operating system.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81108098T ATE5917T1 (en) | 1980-11-12 | 1981-10-09 | BURNER WITH WIDE SLOT NOZZLE TO GENERATE A HOT GAS FLOW. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3042548 | 1980-11-12 | ||
| DE19803042548 DE3042548A1 (en) | 1980-11-12 | 1980-11-12 | BURNER WITH WIDE SLOT NOZZLE FOR GENERATING A HOT GAS FLOW |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0051751A2 true EP0051751A2 (en) | 1982-05-19 |
| EP0051751A3 EP0051751A3 (en) | 1982-09-15 |
| EP0051751B1 EP0051751B1 (en) | 1984-01-18 |
Family
ID=6116518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81108098A Expired EP0051751B1 (en) | 1980-11-12 | 1981-10-09 | Burner with a nozzle having a wide slot for generating a hot gas stream |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0051751B1 (en) |
| AT (1) | ATE5917T1 (en) |
| DE (2) | DE3042548A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486169A2 (en) * | 1990-11-16 | 1992-05-20 | American Gas Association | Low NOx burner |
| EP3324115A1 (en) * | 2016-11-21 | 2018-05-23 | Pro-Iroda Industries, Inc. | Heat gun with self-cooling system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2645263A1 (en) * | 1976-10-07 | 1978-04-13 | Volker Wardt | HEATING GAS GENERATOR |
| DE2822192A1 (en) * | 1978-05-20 | 1979-11-22 | Msk Verpackung Syst Gmbh | Manually operated hot-air jet pistol for heat-shrinking plastics films - has piezoelectric igniter coordinated with ergonomically shaped two=part casing and grip |
-
1980
- 1980-11-12 DE DE19803042548 patent/DE3042548A1/en not_active Withdrawn
-
1981
- 1981-10-09 EP EP81108098A patent/EP0051751B1/en not_active Expired
- 1981-10-09 DE DE8181108098T patent/DE3161981D1/en not_active Expired
- 1981-10-09 AT AT81108098T patent/ATE5917T1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2645263A1 (en) * | 1976-10-07 | 1978-04-13 | Volker Wardt | HEATING GAS GENERATOR |
| DE2822192A1 (en) * | 1978-05-20 | 1979-11-22 | Msk Verpackung Syst Gmbh | Manually operated hot-air jet pistol for heat-shrinking plastics films - has piezoelectric igniter coordinated with ergonomically shaped two=part casing and grip |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486169A2 (en) * | 1990-11-16 | 1992-05-20 | American Gas Association | Low NOx burner |
| EP0486169A3 (en) * | 1990-11-16 | 1992-12-16 | American Gas Association | Low nox burner |
| EP3324115A1 (en) * | 2016-11-21 | 2018-05-23 | Pro-Iroda Industries, Inc. | Heat gun with self-cooling system |
| US20180142920A1 (en) * | 2016-11-21 | 2018-05-24 | Pro-Iroda Industries, Inc. | Heat Gun with Self-Cooling System |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0051751A3 (en) | 1982-09-15 |
| DE3042548A1 (en) | 1982-10-07 |
| DE3161981D1 (en) | 1984-02-23 |
| EP0051751B1 (en) | 1984-01-18 |
| ATE5917T1 (en) | 1984-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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