EP0064636B1 - Device for generating hot gas for shrinking plastic sheets - Google Patents
Device for generating hot gas for shrinking plastic sheets Download PDFInfo
- Publication number
- EP0064636B1 EP0064636B1 EP82103394A EP82103394A EP0064636B1 EP 0064636 B1 EP0064636 B1 EP 0064636B1 EP 82103394 A EP82103394 A EP 82103394A EP 82103394 A EP82103394 A EP 82103394A EP 0064636 B1 EP0064636 B1 EP 0064636B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- outlet nozzle
- hot gas
- jet
- wall
- 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.)
- Expired
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
- B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
- B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
-
- 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
Definitions
- the invention relates to a device for generating hot gas for shrinking plastic films with at least one burner, which is arranged in a housing having an outlet nozzle for an outlet flow in such a way that the hot gas jet emerging from the burner is at an angle to the outlet flow defined by the outlet nozzle is directed and is deflected in front of the end of the outlet nozzle, the housing having at least one wall running obliquely to the outlet flow direction of the device.
- a known device of this type (DE-A1-2624659) is designed as a portable hand-held device. Its burners are arranged in such a way that a fan-shaped flame is generated which is to remain within the housing, so that only hot gases leave the outlet nozzle.
- the burner is also arranged relatively far away from the outlet nozzle in order to ensure that only hot gases leave the outlet nozzle. Therefore, these known devices must have a relatively large length in the direction of the hot gas jet. Since the devices are portable, if necessary, the distance between the device and the plastic film to be shrunk can be increased quickly if, contrary to expectations, a flame emerges from the outlet nozzle.
- stationary shrinking systems which have devices with a plurality of burners arranged along a mast, which produce a hot gas strip which is directed onto a stack of material which is covered by a shrink hood.
- the material of the shrink hood is shrunk by relative movement between the mast and the stack of goods.
- the burners of this device are arranged such that the direction of the hot gas jet coincides with the outflow direction defined by the outlet nozzle. Then it is often observed that the combustion is not yet complete when the gases have entered or left the outlet nozzle. In any case, a flame is visible that not only interferes optically, but also because under these circumstances the hot gases have a temperature that is too high for the plastic film to shrink. Then the distance between the mast and the stack of goods must be changed to prevent the plastic film from burning. However, it takes a relatively long time to change the distance.
- the object of the invention is to improve a device of the type described above so that the hot gas temperature and thus the shrinking temperature can be better controlled.
- the outlet nozzle has walls which merges into the walls with respect to the walls of the outlet nozzle and that the burner is arranged next to the inclined wall and that the hot gas jet emerging from the burner is directed parallel to this wall is.
- the hot gas jet leaving the burner is guided along a relatively long path, so that there is the possibility of influencing the jet in various ways. Only when the jet reaches the jet deflection is it deflected in the direction of the outlet nozzle and then also gets into and through the outlet nozzle. The longer path alone ensures that flame formation no longer occurs in and outside the nozzle.
- the housing can nevertheless be kept relatively short because a sufficiently long path is available along the sloping wall of the housing for the hot gas jet leaving the burner.
- the heat load on the housing wall can be reduced by providing a plurality of lamellae arranged at a mutual distance from one another and / or overlapping one another to form a gap. If the space between the wall and the fins is also connected to a cooling air source, cooling air can be supplied either by an injector effect or by an active cooling fan.
- the burner can be pivoted together with the wall about an axis which, viewed from the outlet nozzle, is in the area of the burner or behind the burner. This applies in particular if the wall in the area of the outlet nozzle forms part of the outlet nozzle because then when the wall is pivoted, the nozzle opening is also enlarged or reduced.
- a preferred embodiment of the invention is characterized by an arrangement with two burners which are arranged on both sides of the axis of the outlet nozzle. In this case, it is advisable to arrange the air nozzle in the area between the outlet nozzle and the connecting line between the two burners.
- the direction of the jet, the jet speed and the temperature of the hot gases emerging from the outlet nozzle can then be varied over a wide range and adapted to the desired conditions.
- the hot gas mast shown in the drawing has a housing 1 with an essentially trapezoidal cross section, the inclined walls 2, 3 of which on the gas transition side, ie on the side facing the stack of goods, into the walls 4, 5 of an outlet nozzle 6.
- a burner 7 or 8 is arranged in the area of the corners of the long side of the trapezoid.
- the burners 7, 8 are substantially tubular and are connected to a supply for combustion gas, not shown.
- the hot gas jets 9 and 10 emerging from the burners are directed parallel to the walls 2 and 3, respectively.
- 2 or 3 slats 11 are arranged on the inside at a certain distance from the walls, in such a way that adjacent slats overlap one another to form gaps 12. It is not shown that the housing 1 is connected at the rear to a cooling air supply, so that the hot gas jets 9, 10 suck in cooling air between the walls 2, 3 and the fins located in front of them by the injector effect. This cooling air exits through the column 12 and mixes with the hot gas jets.
- the cooling air can also be supplied with a blower.
- the walls 2 and 3 with the components attached to them can be pivoted together with the associated burners 7 and 8 about axes 13 and 14, which in the illustrated embodiment coincide with the axes of the tubular burners 8 and 8, respectively.
- an air nozzle 16 is arranged in the burner chamber formed by the housing 1 between the outlet nozzle 6 and a connecting line 15.
- the air nozzle is also tubular and emits a cold air jet 17 which is directed in the direction of the outlet nozzle 6.
- the air nozzle 16 is arranged in the region of the axis of the outlet nozzle 6, so that the two hot gas jets 9, 10 and the cold air jet 17 meet essentially in the region of the outlet nozzle 6 and mix there.
- the hot gas jets are deflected so that a hot gas jet at a reduced temperature emerges from the outlet nozzle 6 and then hits the shrink film.
- the cold air supplied to the air nozzle 16 can be regulated according to pressure and quantity, as a result of which the temperature and quantity of the hot gas jet emerging from the outlet nozzle 6 can also be regulated.
- a shielding plate 18 is arranged between the burners 7 and 8, which ends shortly before the burners 7 and 8, respectively, so that the cooling air supplied to the housing 1 can pass on both sides of each burner 7 or 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
- Package Closures (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Erzeugen von Heißgas für das Schrumpfen von Kunststoffolien mit wenigstens einem Brenner, der so in einem eine Austrittsdüse für eine Austrittsströmung aufweisenden Gehäuse angeordnet ist, daß der aus dem Brenner austretende Heißgasstrahl unter einem Winkel zu der durch die Austrittsdüse definierten Austrittsströmung gerichtet ist und vor dem Ende der Austrittsdüse umgelenkt wird, wobei das Gehäuse wenigstens eine zur Austrittsströmungsrichtung der Vorrichtung schräg verlaufende Wand aufweist.The invention relates to a device for generating hot gas for shrinking plastic films with at least one burner, which is arranged in a housing having an outlet nozzle for an outlet flow in such a way that the hot gas jet emerging from the burner is at an angle to the outlet flow defined by the outlet nozzle is directed and is deflected in front of the end of the outlet nozzle, the housing having at least one wall running obliquely to the outlet flow direction of the device.
Eine bekannte Vorrichtung dieser Gattung (DE-A1-2624659) ist als tragbares Handgerät ausgebildet. Seine Brenner sind so angeordnet, daß eine fächerförmige Flamme erzeugt wird, die innerhalb des Gehäuses bleiben soll, so daß nur heiße Gase die Austrittsdüse verlassen. Bei einer anderen, ebenfalls als Handgerät ausgebildeten Vorrichtung (DE-A1-2 125 568) ist der Brenner ebenfalls verhältnismäßig weit von der Austrittsdüse entfernt angeordnet, um sicherzustellen, daß nur Heißgase die Austrittsdüse verlassen. Deswegen müssen diese bekannten Vorrichtungen eine verhältnismäßig große Länge in Richtung des Heißgasstrahles besitzen. Da es sich um tragbare Handgeräte handelt, kann notfalls der Abstand zwischen der Vorrichtung und der zu schrumpfenden Kunststoffolie auch schnell vergrößert werden, wenn wider Erwarten eine Flamme aus der Austrittsdüse austritt.A known device of this type (DE-A1-2624659) is designed as a portable hand-held device. Its burners are arranged in such a way that a fan-shaped flame is generated which is to remain within the housing, so that only hot gases leave the outlet nozzle. In another device, which is also designed as a hand-held device (DE-A1-2 125 568), the burner is also arranged relatively far away from the outlet nozzle in order to ensure that only hot gases leave the outlet nozzle. Therefore, these known devices must have a relatively large length in the direction of the hot gas jet. Since the devices are portable, if necessary, the distance between the device and the plastic film to be shrunk can be increased quickly if, contrary to expectations, a flame emerges from the outlet nozzle.
Aus der Praxis sind außerdem stationäre Schrumpfanlagen bekannt, die Vorrichtungen mit mehreren längs eines Mastes angeordneten Brennern aufweisen, welche ein Heißgasband erzeugen, das auf einen Gutstapel gerichtet wird, der von einer Schrumpfhaube überzogen ist. Durch Relativbewegung zwischen Mast und Gutstapel wird das Material der Schrumpfhaube eingeschrumpft. In der Regel sind die Brenner dieser Vorrichtung so angeordnet, daß die Richtung des Heißgasstrahls mit der durch die Austrittsdüse definierten Ausströmrichtung übereinstimmt. Dann beobachtet man häufig, daß die Verbrennung noch nicht abgeschlossen ist, wenn die Gase in die Austrittsdüse eintreten oder diese verlassen haben. Jedenfalls ist eine Flamme sichtbar, die nicht nur optisch, sondern auch deswegen stört, weil unter diesen Umständen die Heißgase eine Temperatur besitzen, die für das Schrumpfen der Kunststoffolie zu hoch ist. Dann muß der Abstand zwischen dem Mast und dem Gutstapel verändert werden, um zu verhindern, daß die Kunststoffolie verbrennt. Zum Verändern des Abstandes wird aber verhältnismäßig viel Zeit benötigt.In practice, stationary shrinking systems are also known which have devices with a plurality of burners arranged along a mast, which produce a hot gas strip which is directed onto a stack of material which is covered by a shrink hood. The material of the shrink hood is shrunk by relative movement between the mast and the stack of goods. As a rule, the burners of this device are arranged such that the direction of the hot gas jet coincides with the outflow direction defined by the outlet nozzle. Then it is often observed that the combustion is not yet complete when the gases have entered or left the outlet nozzle. In any case, a flame is visible that not only interferes optically, but also because under these circumstances the hot gases have a temperature that is too high for the plastic film to shrink. Then the distance between the mast and the stack of goods must be changed to prevent the plastic film from burning. However, it takes a relatively long time to change the distance.
Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs beschriebenen Art so zu verbessern, daß die Heißgastemperatur und damit die Schrumpftemperatur besser beherrscht werden können.The object of the invention is to improve a device of the type described above so that the hot gas temperature and thus the shrinking temperature can be better controlled.
Diese Aufgabe wird dadurch gelöst, daß die Austrittsdüse Wandungen aufweist, die in bezug auf die Wandungen der Austrittsdüse schräg verlaufende Wand in die Wandungen übergeht und daß der Brenner neben der schrägen Wand angeordnet ist sowie daß der aus dem Brenner austretende Heißgasstrahl parallel zu dieser Wand gerichtet ist.This object is achieved in that the outlet nozzle has walls which merges into the walls with respect to the walls of the outlet nozzle and that the burner is arranged next to the inclined wall and that the hot gas jet emerging from the burner is directed parallel to this wall is.
Dabei wird der den Brenner verlassende Heißgasstrahl auf einem verhältnismäßig langen Weg geführt, so daß die Möglichkeit besteht, den Strahl in verschiedener Weise zu beeinflussen. Erst wenn der Strahl die Strahlumlenkung erreicht, wird er in Richtung der Austrittsdüse umgelenkt und gelangt dann auch in und durch die Austrittsdüse. Allein aufgrund des längeren Weges ist bereits sichergestellt, daß eine Flammenbildung in und außerhalb der Düse nicht mehr auftritt. Das Gehäuse kann dennoch verhältnismäßig kurz gehalten werden, weil längs der schrägen Wandung des Gehäuses eine hinreichend lange Bahn für den den Brenner verlassenden Heißgasstrahl zur Verfügung steht.The hot gas jet leaving the burner is guided along a relatively long path, so that there is the possibility of influencing the jet in various ways. Only when the jet reaches the jet deflection is it deflected in the direction of the outlet nozzle and then also gets into and through the outlet nozzle. The longer path alone ensures that flame formation no longer occurs in and outside the nozzle. The housing can nevertheless be kept relatively short because a sufficiently long path is available along the sloping wall of the housing for the hot gas jet leaving the burner.
Die Wärmebelastung der Gehäusewand kann dadurch verringert werden, daß auf ihrer Innenseite mehrere mit gegenseitigem Abstand voneinander angeordnete und/oder einander spaltbildend überlappende Lamellen vorgesehen sind. Wenn zusätzlich der Zwischenraum zwischen Wand und Lamellen an eine Kühlluftquelle angeschlossen ist, kann zusätzlich Kühlluft entweder durch Injektorwirkung oder durch ein aktives Kühlgebläse zugeführt werden.The heat load on the housing wall can be reduced by providing a plurality of lamellae arranged at a mutual distance from one another and / or overlapping one another to form a gap. If the space between the wall and the fins is also connected to a cooling air source, cooling air can be supplied either by an injector effect or by an active cooling fan.
Weitere Möglichkeiten zur Beeinflussung des Heißgasstrahles bestehen dann, wenn der Brenner zusammen mit der Wand um eine Achse schwenkbar ist, die, von der Austrittsdüse aus gesehen, im Bereich des Brenners oder hinter dem Brenner liegt. Das gilt insbesondere dann, wenn die Wand im Bereich der Austrittsdüse einen Teil der Austrittsdüse bildet, weil dann beim Verschwenken der Wand auch die Düsenöffnung vergrößert oder verkleinert wird.There are further possibilities for influencing the hot gas jet if the burner can be pivoted together with the wall about an axis which, viewed from the outlet nozzle, is in the area of the burner or behind the burner. This applies in particular if the wall in the area of the outlet nozzle forms part of the outlet nozzle because then when the wall is pivoted, the nozzle opening is also enlarged or reduced.
Eine bevorzugte Ausführungsform der Erfindung ist gekennzeichnet durch eine Anordnung mit zwei Brennern, die beidseits der Achse der Austrittsdüse angeordnet sind. In diesem Fall empfiehlt es sich, die Luftdüse im Bereich zwischen der Austrittsdüse und der Verbindungslinie der beiden Brenner anzuordnen. Strahlrichtung, Strahlgeschwindigkeit und Temperatur der aus der Austrittsdüse auftretenden Heißgase lassen sich dann in einen weiten Bereich veriieren und den gewünschten Verhältnissen anpassen.A preferred embodiment of the invention is characterized by an arrangement with two burners which are arranged on both sides of the axis of the outlet nozzle. In this case, it is advisable to arrange the air nozzle in the area between the outlet nozzle and the connecting line between the two burners. The direction of the jet, the jet speed and the temperature of the hot gases emerging from the outlet nozzle can then be varied over a wide range and adapted to the desired conditions.
Im folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert; es zeigt die einzige Figur teilweise einen Querschnitt durch einen Heißgasmast, der relativ zu einem Gutstapel bewegbar ist, über den eine Schrumpfhaube gezogen ist.In the following an embodiment of the invention shown in the drawing is explained; it shows the only figure partially a cross section through a hot gas mast, which is movable relative to a stack of goods over which a shrink hood is pulled.
Der in der Zeichnung dargestellte Heißgasmast besitzt ein Gehäuse 1 mit einem im wesentlichen trapezförmigen Querschnitt, dessen schräg verlaufende Wände 2, 3 auf der Gasaustrittsseite, d. h. auf der dem Gutstapel zugewandten Seite, in die Wandungen 4, 5 einer Austrittsdüse 6 übergehen. Im Bereich der Ecken der langen Seite des Trapezes ist jeweils ein Brenner 7 bzw. 8 angeordnet. Die Brenner 7, 8 sind im wesentlichen rohrförmig ausgebildet und sind an eine nicht dargestellte Zuführung für Verbrennungsgas angeschlossen. Die aus den Brennern austretenden Heißgasstrahlen 9 bzw. 10 sind parallel zu den Wänden 2 bzw. 3 gerichtet.The hot gas mast shown in the drawing has a housing 1 with an essentially trapezoidal cross section, the inclined walls 2, 3 of which on the gas transition side, ie on the side facing the stack of goods, into the
Um die Wände 2, 3 vor zu großer Wärmebelastung zu schützen, sind innenseitig in einigem Abstand vor den Wänden 2 bzw. 3 Lamellen 11 angeordnet, und zwar so, daß benachbarte Lamellen einander unter Bildung von Spalten 12 einander überlappen. Nicht dargestellt ist, daß das Gehäuse 1 rückseitig an eine Kühlluftzufuhr angeschlossen ist, so daß die Heißgasstrahlen 9, 10 durch Injektorwirkung Kühlluft zwischen den Wänden 2, 3 und den davor befindlichen Lamellen ansaugen. Diese Kühlluft tritt durch die Spalte 12 aus und mischt sich mit den Heißgasstrahlen.In order to protect the walls 2, 3 from excessive heat, 2 or 3 slats 11 are arranged on the inside at a certain distance from the walls, in such a way that adjacent slats overlap one another to form
Bei einer anderen Ausführungsform kann die Kühlluft auch mit einem Gebläse zugeführt werden.In another embodiment, the cooling air can also be supplied with a blower.
Die Wände 2 bzw. 3 mit den daran befestigten Bauteilen sind zusammen mit den zugeordneten Brennern 7 bzw. 8 um Achsen 13 bzw. 14 schwenkbar, die beim dargestellten Ausführungsbeispiel mit den Achsen der rohrförmigen Brenner bzw. 8 zusammenfallen.The walls 2 and 3 with the components attached to them can be pivoted together with the associated
Ferner ist in dem vom Gehäuse 1 gebildeten Brennerraum zwischen Austrittsdüse 6 und einer Verbindungslinie 15 eine Luftdüse 16 angeordnet. Die Luftdüse ist ebenfalls rohrförmig und gibt einen Kaltluftstrahl 17 ab, der in Richtung auf die Austrittsdüse 6 gerichtet ist. Beim dargestellten Ausführungsbeispiel ist die Luftdüse 16 im Bereich der Achse der Austrittsdüse 6 angeordnet, so daß die beiden Heißgasstrahlen 9, 10 und der Kaltluftstrahl 17 sich im wesentlichen im Bereich der Austrittsdüse 6 treffen und dort vermischen. Gleichzeitig werden die Heißgasstrahlen umgelenkt, so daß aus der Austrittsdüse 6 ein Heißgasstrahl mit reduzierter Temperatur austritt, der anschließend auf die Schrumpffolie trifft.Furthermore, an
Nicht dargestellt ist, daß die der Luftdüse 16 zugeführte Kaltluft nach Druck und Menge regelbar ist, wodurch im Ergebnis auch Temperatur und Menge des aus der Austrittsdüse 6 austretenden Heißgasstrahls regelbar sind.It is not shown that the cold air supplied to the
Um zu verhindern, daß die dem Gehäuse 1 zugeführte Kühlluft sich unkontrolliert im Gehäuse 1 verbreitet, ist zwischen den Brennern 7 und 8 ein Abschirmblech 18 angeordnet, das jeweils kurz vor den Brennern 7 bzw. 8 endet, so daß die dem Gehäuse 1 zugeführte Kühlluft an beiden Seiten jedes Brenners 7 bzw. 8 vorbeistreichen kann.In order to prevent the cooling air supplied to the housing 1 from spreading uncontrollably in the housing 1, a
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT82103394T ATE12377T1 (en) | 1981-05-09 | 1982-04-22 | DEVICE FOR GENERATION OF HOT GAS FOR SHRINKING PLASTIC FILMS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813118396 DE3118396A1 (en) | 1981-05-09 | 1981-05-09 | DEVICE FOR PRODUCING HOT GAS FOR THE SHRINKING OF PLASTIC FILMS |
| DE3118396 | 1981-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0064636A1 EP0064636A1 (en) | 1982-11-17 |
| EP0064636B1 true EP0064636B1 (en) | 1985-03-27 |
Family
ID=6131851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82103394A Expired EP0064636B1 (en) | 1981-05-09 | 1982-04-22 | Device for generating hot gas for shrinking plastic sheets |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4470807A (en) |
| EP (1) | EP0064636B1 (en) |
| AT (1) | ATE12377T1 (en) |
| DE (2) | DE3118396A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549866A (en) * | 1984-05-08 | 1985-10-29 | Flynn Burner Corporation | Method and apparatus for applying heat to articles and materials |
| DE8704033U1 (en) | 1987-03-18 | 1987-05-07 | MSK-Verpackungs-Systeme GmbH, 4190 Kleve | Device for generating hot gas for shrinking plastic films |
| DE3708911A1 (en) * | 1987-03-19 | 1988-09-29 | Praezisions Werkzeuge Ag | METHOD AND ARRANGEMENT FOR HEATING A WORKPIECE SURFACE |
| DE102007030264B4 (en) * | 2007-06-28 | 2009-10-01 | Khs Ag | burner unit |
| DE102009003575A1 (en) | 2009-03-06 | 2010-09-09 | Krones Ag | Apparatus and method for heat treatment of packaging goods |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3217779A (en) * | 1963-07-18 | 1965-11-16 | Zink Co John | Gas and liquid fuel burner combination |
| US3529917A (en) * | 1968-07-23 | 1970-09-22 | Eng Co The | Air-mixing device for fuel burner |
| DE2125568A1 (en) * | 1971-05-24 | 1972-11-30 | Interpalet Gmbh, Zug (Schweiz) | Hot shrinking plastic sheet - over palletised goods using hot gas blower |
| IT1036845B (en) * | 1975-06-11 | 1979-10-30 | Sphirt Snc | FLAME FAN PRTATILE HEATING APPLIANCE |
| US4155700A (en) * | 1976-12-30 | 1979-05-22 | Babington Robert S | Liquid fuel burners |
-
1981
- 1981-05-09 DE DE19813118396 patent/DE3118396A1/en not_active Withdrawn
-
1982
- 1982-04-22 EP EP82103394A patent/EP0064636B1/en not_active Expired
- 1982-04-22 AT AT82103394T patent/ATE12377T1/en active
- 1982-04-22 DE DE8282103394T patent/DE3262756D1/en not_active Expired
- 1982-05-10 US US06/376,620 patent/US4470807A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE12377T1 (en) | 1985-04-15 |
| EP0064636A1 (en) | 1982-11-17 |
| US4470807A (en) | 1984-09-11 |
| DE3118396A1 (en) | 1982-12-02 |
| DE3262756D1 (en) | 1985-05-02 |
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