WO2003021173A1 - Dispositif a rayonnement ultraviolet - Google Patents

Dispositif a rayonnement ultraviolet Download PDF

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Publication number
WO2003021173A1
WO2003021173A1 PCT/EP2002/009177 EP0209177W WO03021173A1 WO 2003021173 A1 WO2003021173 A1 WO 2003021173A1 EP 0209177 W EP0209177 W EP 0209177W WO 03021173 A1 WO03021173 A1 WO 03021173A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
radiation
elongated
irradiation device
lamp
Prior art date
Application number
PCT/EP2002/009177
Other languages
German (de)
English (en)
Inventor
Wolfgang Kiefer
Original Assignee
Dr. Hönle AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dr. Hönle AG filed Critical Dr. Hönle AG
Publication of WO2003021173A1 publication Critical patent/WO2003021173A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/025—Associated optical elements

Definitions

  • the present invention relates to a UV irradiation device for irradiating objects with ultraviolet radiation (UV radiation).
  • UV radiation ultraviolet radiation
  • UV radiation devices for irradiating objects with UV radiation are manufactured and sold, for example, by the applicant in various configurations and are used, among other things, for drying and curing adhesives, paints, plastics, etc.
  • Fields of application are, for example, the irradiation of compact discs, digital Video discs etc.
  • FIG. 7 represents a cross section through the generally elongated UV irradiation device 70.
  • the known UV irradiation device 70 comprises an elongated reflector 71 consisting of two parts 71a, 71b with layers 70a, 70b made of highly reflective material, which extends along an elongated UV lamp 72 for emitting UV radiation.
  • the elongated reflector 71 and the UV lamp 12 are located in a housing 73.
  • the UV lamp 72 shown in cross section emits UV radiation on all sides, the UV radiation imitated upwards in the drawing plane of FIG. 7 by the two Reflector layers 70a and 70b is reflected down to a passage opening 75.
  • the passage opening 75 is delimited by a first long side 76 of the reflector part 71b and a second long side 77 of the second reflector part 71a.
  • An elongated holder 80 for a further reflector 78 is connected to the first longitudinal side 76 of the first reflector part 71b.
  • the reflector 78 comprises a flat surface made of highly reflective material and is clamped in the reflector holder 80.
  • the reflector 78 reflects UV radiation emitted directly by the UV lamp 72 and UV radiation reflected by the reflector layers 70a and 70b to an outlet opening 74 which adjoins the second longitudinal side 77 of the second reflector part 71a.
  • the UV radiation falling through the outlet opening 74 is used to irradiate objects 79 which are placed in front of the outlet opening 74 or are moved along it.
  • the dwell time of the objects 79 in front of the outlet opening 74 and the type of UV lamps 72 used here vary depending on the type of objects to be irradiated and on the purpose of the UV radiation.
  • a problem with the irradiation of objects with UV radiation is the infrared (IR) radiation simultaneously generated by the UV lamps.
  • the IR radiation also radiated onto the objects can lead to a strong heating of the objects and consequently to damage to the irradiated objects.
  • IR radiation also radiated onto the objects can lead to a strong heating of the objects and consequently to damage to the irradiated objects.
  • Various measures are possible to solve this problem.
  • the irradiated objects 79 can be cooled with water cooling in order to remove the heat generated by the IR radiation and to ensure efficient drying or curing by the UV radiation.
  • water cooling is associated with a very high outlay and cannot usually be integrated into the manufacturing process.
  • a further possibility is the use of a reflector made of dichroic material for the reflector 78. Since practically all of the UV radiation emitted by the UV lamp 72 either falls directly onto the further reflector 78 or is reflected by the reflector layers 70a and 70b, this can pass through here the use of dichroic material the IR portion of UV radiation can be greatly reduced. Dichroic material can also be used for the reflector layers 70a and 70b.
  • the disadvantage of using dichroic material is that the reflection losses reduce the UV radiation efficiency.
  • the UV radiation efficiency is further reduced by the use of the additional reflector 78 as a result of the losses due to the longer beam path.
  • Another problem is that although the reflector 78 can filter out a relatively high IR component from the UV radiation, the resulting heat is not particularly effective as a result of the material transitions between the reflector and air reflector holder.
  • the design of the reflector 78 with a flat reflection surface has not proven to be advantageous with regard to the homogeneity and the strength of the UV radiation incident on the object 79.
  • the object of the present invention is therefore to provide an irradiation device for irradiating objects with UV radiation, which enables irradiation of the object in the simplest and most effective way possible, in particular with regard to the necessary power and the heating of the object.
  • the above object is achieved by an irradiation device for irradiating objects with UV radiation according to spoke 1.
  • the irradiation device according to the invention comprises an elongated UV lamp for emitting UV radiation, a first elongated reflector made of highly reflective material which extends along and partially encloses the UV lamp, a first and a second of the first longitudinal side opposite the first elongated side Complete the reflector and define a passage opening for the UV radiation, a second elongated reflector made of highly reflective material, which is located on the first long side of the first elongated reflector and reflects UV radiation coming from the UV lamp or from the first elongated reflector to an outlet opening which adjoins the second longitudinal side, the second elongated reflector at least partially around an axis parallel to the elongated UV lamp is curved.
  • the at least partially curved shape of the second reflector results in a significantly improved distribution of the UV radiation incident on an object to be irradiated.
  • the second elongate reflector has a substantially flat area towards the outlet opening. This larger or smaller flat area near the outlet opening, depending on the application, ensures that UV radiation coming from the irradiation device is actually reflected onto the object to be irradiated and not back into the irradiation device. This increases the radiation efficiency.
  • the second elongated reflector can be completely curved around one or more axes parallel to the elongated UV lamp. This configuration can be advantageous in special applications. Furthermore, a completely curved reflector may be easier and therefore cheaper to manufacture.
  • the second elongate reflector advantageously has regions with different radii of curvature.
  • the homogeneity distribution and the efficiency of the UV radiation incident on an object to be irradiated can be tailored precisely to the requirements.
  • this makes it possible to connect the second reflector to the first reflector continuously, that is to say without kinks or other obstacles interfering with the reflection of the UV radiation. It is particularly advantageous here if the second elongate reflector has a smaller radius of curvature in a first region adjoining the first longitudinal side of the first elongate reflector than in a second region adjoining the first region.
  • the second elongated reflector has no kinks.
  • the surface of the second reflector can be continuously differentiated in cross section. This minimizes reflection losses.
  • the highly reflective material of the second elongated reflector is advantageously vapor-deposited directly onto a reflector element provided with cooling ribs. hereby efficient absorption and derivation of the IR portion of the UV radiation absorbed by the second reflector is made possible.
  • the reflector element is advantageously an extruded aluminum profile. It is also advantageous if the highly reflective material of the second elongate reflector is a dichroic material. Such a material enables a particularly high absorption of the IR component of the incident UV radiation. This ensures that the UV radiation incident on the object to be irradiated has the lowest possible IR component and thus the heat development in the object to be irradiated is minimal.
  • FIG. 1 shows a schematic front view of an irradiation device according to the invention
  • FIG. 2 shows a schematic sectional view of a first exemplary embodiment of an irradiation device according to the invention
  • FIG. 3 shows a schematic sectional view of a second exemplary embodiment of an irradiation device according to the invention
  • Figure 4 shows a more accurate representation of the second reflector in
  • FIG. 3 shows the exemplary embodiment shown
  • Figure 5 is a more detailed representation of the first shown in Figure 4
  • FIG. 6 shows a comparison diagram of the irradiance levels per cross-sectional area for the first and the second exemplary embodiment of the irradiation device according to the invention and the known irradiation device shown in FIG. 7, and
  • Figure 7 is a schematic sectional view of a known radiation device.
  • FIG. 1 shows a schematic front view of an irradiation device 10 according to the invention for irradiating objects with UV radiation.
  • the irradiation device 10 comprises a housing 11 in which an elongated UV lamp is arranged for emitting UV radiation.
  • the UV lamp is located in an upper part of the housing 11.
  • the irradiation device 10 according to the invention comprises a reflector holder 13, which receives the UV radiation coming from the UV lamp 12 or from the reflectors surrounding this UV lamp 12 at the front to an outlet opening 14, that is to say reflected from the plane of the drawing.
  • FIG. 2 shows a cross section of the irradiation device 10 shown in FIG. 1.
  • a first elongated reflector 21 with an essentially elliptical shape in cross section.
  • the first elongated reflector 21 comprises two reflecting layers 20a and 20b, which partially enclose the UV lamp 12 and reflect the UV radiation emitted by the UV lamp 12 in the direction of a passage opening 22.
  • the passage opening 22 is defined by a first longitudinal side 24 and a second longitudinal side 25 opposite the first longitudinal side 24, which terminate the first elongated reflector 21 on both sides.
  • the two reflector layers 20a and 20b are each vapor-deposited onto an aluminum profile 21a or 21b or attached to the associated aluminum profile as a separate reflector layer.
  • the two aluminum profiles 21a and 21b have cooling fins through which the energy released in the form of heat when the UV radiation is reflected is removed by appropriate coolants, for example water or air.
  • the essentially elliptical shape of the first elongated reflector 21 ensures a very homogeneous and efficient reflection of the UV radiation to the passage opening 22, that is to say downwards in the illustrated FIG. 2.
  • the reflector holder 13 already mentioned with reference to FIG. 1 is connected to the first longitudinal side 24 of the first reflector 21.
  • the reflector holder 13 comprises a second reflector 23a, which reflects UV radiation coming through the passage opening 22 to an outlet opening 14 which adjoins the second longitudinal side 25 of the first reflector.
  • the outlet opening 14 extends essentially perpendicular to the through opening 22, so that objects 26 located in front of the outlet opening 14 and which are irradiated with the UV radiation do not receive any direct UV radiation from the UV lamp 12. but essentially only UV radiation reflected by the first reflector 21 and the second reflector 23a.
  • the object or objects 26 irradiated with UV radiation are either moved along the exit opening 14 or remain statically in one place for a specific irradiation time.
  • the irradiation device 10 according to the invention can be used to irradiate objects 26 of any type and for any type of application. However, the irradiation device 10 according to the invention is specially designed for drying and curing UV-reactive paints, varnishes or adhesives.
  • the UV lamp 12 can also be any type of UV lamp, such as gas discharge lamps of different pressure ranges. A medium-pressure gas discharge lamp as UV lamp 12 is advantageous for the preferred applications mentioned above.
  • the discharge lamp can have different types of doping, for example a gallium doping, a mercury doping or the like.
  • a metal halogenite emitter can also be used.
  • the arc length, the selected power and the exposure time are each to be matched to the size of the object 26 to be irradiated and to the purpose of the irradiation.
  • the second elongated reflector 23a is at least partially curved about an axis parallel to the UV lamp 12, that is to say its longitudinal axis A.
  • the curvature of the second reflector 23 a can be clearly seen in the cross section of FIG. 2.
  • the second reflector 23a is essentially composed of two regions, namely a first region 27a, which directly adjoins and is curved on the first longitudinal side 24 of the first reflector, and a second region 28a, which adjoins the outlet opening 14 and one in has a substantially flat surface. This shape of the second reflector 23a achieves the radiation efficiency and an increase in the radiation dose of the UV radiation radiated onto the object 26.
  • the highly reflective material of the first reflector 20a, 20b and the second reflector 22a is advantageously high-purity aluminum.
  • High-purity aluminum means, for example, a degree of purity of 99.99% aluminum, through which the UV radiation is reflected with practically no loss on the objects to be irradiated.
  • dichroic reflectors for the layers 20a and 20b of the first reflector 21 and for the second reflector 23a is particularly advantageous.
  • the chroitic reflectors are particularly advantageous because they reduce the IR portion of the radiation by approximately 25% when reflecting the UV radiation. The heat generated by the absorbed IR component is removed by suitable coolants.
  • FIG. 3 shows the cross section of a second exemplary embodiment of an irradiation device 30 according to the invention.
  • the irradiation device 30 differs only in the shape of the housing and the second reflector 23b from the irradiation device 10 shown in FIGS. 1 and 2, so that all of the above statements also apply to the second exemplary embodiment.
  • the radiation device 30 has a somewhat larger housing 31, in which the housing 11 is fastened via an inner housing 32, in which the first reflector 21 and the UV lamp 12 are arranged, as with reference to FIG. 2 was explained.
  • Another difference is the shape of the second reflector 23b.
  • the general division into a curved region 27b and a flat region 28b adjoining the outlet opening 14 is identical to the irradiation device 10.
  • the flat region 28b is somewhat longer than the flat region 28a of the first exemplary embodiment, so that the entire surface of the second In the second exemplary embodiment, the reflector 23b extends to the outer edge of the outer housing 31 and thus the outlet opening 14 is again arranged essentially at right angles to the passage opening 22.
  • the flat surface 28b is somewhat elongated in comparison to the flat surface 28a in order to take into account the larger housing. All other essential properties and functions of the radiation device 30 correspond to those of the radiation device 10.
  • FIG. 4 shows a schematic illustration of the second reflector 23a of the irradiation device 30 from FIG. 3.
  • the curved area 27b of the second reflector 23b is divided into different areas with different radii of curvature.
  • a first region 40 which directly adjoins the first longitudinal side 24 of the first reflector, the second reflector 23b has a medium-sized radius, 90.78 cm in the example shown.
  • a central region 41 which adjoins the first region 40, the second reflector 23b has a large radius of 114.50 cm in the example shown.
  • the second reflector 23b In a third area 42, which is located between the middle area 41 and the flat area 28b, the second reflector 23b has a small radius of 50.0 cm.
  • the length of the flat area is 43.41 cm in the example shown.
  • the shape of the second reflector 23b shown in FIG. 4 is an optimized shape with regard to the radiation efficiency and radiation dose of the UV radiation impinging on the object 26. Deviations from this special form for certain applications are possible. However, it has been shown that the configuration of the second reflector 23b with at least two regions of different curvature and a flat region towards the outlet opening 14 has particular advantages. It should also be emphasized that the second reflector 23a of the irradiation device 10 can also have regions 40, 41 and 42 which are curved very similarly or identically to the second 4. The reflector 23b of FIG. 4. Only the flat surface 28a of the second reflector 23a of the irradiation device 10 is somewhat shorter than the flat surface 28b of the second reflector 23b.
  • FIG 5 shows a somewhat more detailed cross-section of the first embodiment of the irradiation device according to the invention shown in Figure 2 10.
  • the second reflector 23 comprises an aluminum profile 50 with cooling fins 51 which project from the surface of the second • reflector 23a back to the reflector holder. 13 The cooling and the removal of the heat takes place via suitable coolants, such as air or water.
  • the second reflector 23a is advantageously vapor-deposited directly onto the aluminum profile 50, as a result of which the efficiency of heat dissipation is significantly increased since the heat absorbed during the reflection of the UV radiation is transferred directly to the aluminum profile 50 and its cooling fins 51.
  • the same principle is advantageously used for the first reflector 21, the layers 20a, 20b of which can also be evaporated onto the aluminum profiles 21a and 21b.
  • FIG. 6 shows a diagram of the power radiated per area in relation to the cross-sectional area of the object 26 to be irradiated for the known irradiation device 70 (curve I) shown in FIG. 7, the irradiation device 10 (curve II) and the irradiation device 30 (curve III).
  • the special geometry of the second reflector 23a and 23b of the irradiation devices 10 and 30 according to the invention has an increase of approximately 80% in the tip and an increase of approximately 30% in relation to the total irradiated on the object 26 Allow dose.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un dispositif de rayonnement (10 ; 30) utilisé pour exposer des objets (26) à l'action de rayons UV, qui comprend une lampe UV oblongue (12) servant à émettre des rayons UV, un premier réflecteur oblong (21) en matériau hautement réfléchissant, qui s'étend le long de la lampe UV (12) et l'entoure en partie, un premier (24) et un second (25) des premiers grands côtés opposés fermant le premier réflecteur oblong (21) et définissant une ouverture de passage (22) pour le rayonnement UV ; un second réflecteur oblong (23a ; 23b) en matériau hautement réfléchissant, qui jouxte le premier grand côté (24) du premier réflecteur oblong (21) et réfléchit un rayonnement UV provenant de la lampe UV et du premier réflecteur oblong, en direction de l'ouverture de sortie (14) qui se raccorde au second grand côté (25). Le second réflecteur oblong (23a ; 23b) est courbé au moins en partie autour d'un axe (A) parallèle à la lampe UV oblongue.
PCT/EP2002/009177 2001-08-31 2002-08-16 Dispositif a rayonnement ultraviolet WO2003021173A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20114380.1 2001-08-31
DE20114380U DE20114380U1 (de) 2001-08-31 2001-08-31 UV-Bestrahlungsvorrichtung

Publications (1)

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WO2003021173A1 true WO2003021173A1 (fr) 2003-03-13

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DE (1) DE20114380U1 (fr)
TW (1) TWI224342B (fr)
WO (1) WO2003021173A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006015694A1 (fr) * 2004-08-06 2006-02-16 Ist Metz Gmbh Unite d'irradiation
DE102008023797A1 (de) 2008-05-15 2009-11-19 Krones Ag Vorrichtung zum Sterilisieren von Behältnisverschlüssen
GB2468702A (en) * 2009-03-19 2010-09-22 Gew Ink curing apparatus with integrally formed reflector and cooling means
GB2495901A (en) * 2011-08-08 2013-05-01 Gew Ec Ltd Double-walled housing for an ultra-violet ink curing apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846404B1 (fr) * 2002-10-23 2005-09-09 Electricite De France Bloc optique de chauffage rapide
DE10333664B4 (de) * 2003-07-23 2014-03-27 Eltosch Torsten Schmidt Gmbh Vorrichtung zum Härten von Substanzen
JP5195051B2 (ja) * 2008-06-09 2013-05-08 ウシオ電機株式会社 紫外線照射装置
DE102008061597B4 (de) 2008-12-11 2021-06-24 Venjakob Maschinenbau Gmbh & Co. Kg UV-Bestrahlungsvorrichtung
WO2010066297A1 (fr) * 2008-12-11 2010-06-17 Osram Gesellschaft mit beschränkter Haftung Lampe à uv dotée d'un réflecteur
DE102013011066A1 (de) * 2013-07-03 2015-01-08 Oerlikon Trading Ag, Trübbach Wärme-Lichttrennung für eine UV-Strahlungsquelle

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US4048490A (en) * 1976-06-11 1977-09-13 Union Carbide Corporation Apparatus for delivering relatively cold UV to a substrate
GB1581533A (en) * 1977-12-19 1980-12-17 Wallace Knight Ltd Apparatus for treating a sheet material with radiation
EP0194590A2 (fr) * 1985-03-15 1986-09-17 Licentia Patent-Verwaltungs-GmbH Armature lumineuse allongée avec réflecteur incorporé
US4716658A (en) * 1986-12-11 1988-01-05 Amjo Infra Red Dryers, Inc. Heat lamp assembly
EP0453956A2 (fr) * 1990-04-23 1991-10-30 Licentia Patent-Verwaltungs-GmbH Dispositif d'éclairage à faisceau asymétrique
US5075827A (en) * 1990-10-31 1991-12-24 Smith David H Indirect light fixture amplification reflector system
DE4301718A1 (de) * 1993-01-22 1994-07-28 Jochen Dipl Ing Hagedorn UV-Bestrahlungseinrichtung
DE19651977A1 (de) * 1996-12-13 1998-06-18 Michael Bisges UV-Bestrahlungsvorrichtung
US5973331A (en) * 1996-08-02 1999-10-26 Nordson Corporation Lamp assembly

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Publication number Priority date Publication date Assignee Title
DE4318735A1 (de) * 1993-06-05 1994-12-08 Kammann Maschf Werner UV-Strahler zum Bestrahlen von Druckfarben auf Objekten und Verfahren zum Trocknen von mit Druckfarbe versehenen Objekten
DE29919483U1 (de) * 1999-11-05 2000-03-30 Hoenle Ag Dr UV-Bestrahlungsvorrichtung
DE10109061A1 (de) * 2000-03-08 2001-10-04 Nordson Corp Lampenanordnung
DE20005670U1 (de) * 2000-03-27 2000-05-31 Hoenle Ag Dr UV-Bestrahlungsvorrichtung mit im wesentlichen geschlossenen Reflektor, insbesondere zur Härtung von UV-reaktiven Klebstoffen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048490A (en) * 1976-06-11 1977-09-13 Union Carbide Corporation Apparatus for delivering relatively cold UV to a substrate
GB1581533A (en) * 1977-12-19 1980-12-17 Wallace Knight Ltd Apparatus for treating a sheet material with radiation
EP0194590A2 (fr) * 1985-03-15 1986-09-17 Licentia Patent-Verwaltungs-GmbH Armature lumineuse allongée avec réflecteur incorporé
US4716658A (en) * 1986-12-11 1988-01-05 Amjo Infra Red Dryers, Inc. Heat lamp assembly
EP0453956A2 (fr) * 1990-04-23 1991-10-30 Licentia Patent-Verwaltungs-GmbH Dispositif d'éclairage à faisceau asymétrique
US5075827A (en) * 1990-10-31 1991-12-24 Smith David H Indirect light fixture amplification reflector system
DE4301718A1 (de) * 1993-01-22 1994-07-28 Jochen Dipl Ing Hagedorn UV-Bestrahlungseinrichtung
US5973331A (en) * 1996-08-02 1999-10-26 Nordson Corporation Lamp assembly
DE19651977A1 (de) * 1996-12-13 1998-06-18 Michael Bisges UV-Bestrahlungsvorrichtung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006015694A1 (fr) * 2004-08-06 2006-02-16 Ist Metz Gmbh Unite d'irradiation
US7858956B2 (en) 2004-08-06 2010-12-28 Ist Metz Gmbh UV irradiation unit for substrates
DE102008023797A1 (de) 2008-05-15 2009-11-19 Krones Ag Vorrichtung zum Sterilisieren von Behältnisverschlüssen
US8728394B2 (en) 2008-05-15 2014-05-20 Krones Ag Device for sterilizing container closures
GB2468702A (en) * 2009-03-19 2010-09-22 Gew Ink curing apparatus with integrally formed reflector and cooling means
GB2495901A (en) * 2011-08-08 2013-05-01 Gew Ec Ltd Double-walled housing for an ultra-violet ink curing apparatus
GB2495901B (en) * 2011-08-08 2014-03-12 Gew Ec Ltd Improved housing for ink curing apparatus

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Publication number Publication date
TWI224342B (en) 2004-11-21
DE20114380U1 (de) 2002-02-21

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