EP0489355A2 - Method of producing an outer air grid - Google Patents
Method of producing an outer air grid Download PDFInfo
- Publication number
- EP0489355A2 EP0489355A2 EP91120346A EP91120346A EP0489355A2 EP 0489355 A2 EP0489355 A2 EP 0489355A2 EP 91120346 A EP91120346 A EP 91120346A EP 91120346 A EP91120346 A EP 91120346A EP 0489355 A2 EP0489355 A2 EP 0489355A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- outside air
- fins
- bent
- sheet
- angle
- 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
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000004049 embossing Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000004080 punching Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/005—Making gratings
Definitions
- Outdoor air grilles of this type are known and are available in a wide variety of designs and types from the market. Such outside air grilles differ primarily in the size, arrangement and number of the assigned slats in a corresponding frame. For example, there are outside air grilles with a few wide fins or those with a rather narrow and therefore many fins.
- the process is energy-wasting due to the energy required for the various punchings as well as for the welding apparatus and due to the energy consumption necessary for operating the suction devices prescribed for such work.
- the inventor has set himself the task of creating a method for producing an outside air grille which can be carried out in a more cost-effective, environmentally friendly and energy-saving manner.
- a sheet in particular a steel sheet, is cut to the size of the later external air grille, then kink lines are embossed into the sheet as one side of the lamellae, and then slots which circumscribe the other sides of the lamellae are cut out be punched and punched and that in a further working step each lamella is angled at an angle around the fold line.
- a steel sheet, a sheet metal or the like or a plate of a desired material is required for the production, which corresponds in contours to the shape of the later outlet grille, with as much material being taken into account on the edge as is necessary for the later folding of an edge strip is.
- This sheet is then embossed by means of a special and special manufacturing process, at the connection points of lamella and sheet, the remaining contour is cut out or punched and, if necessary, licked out.
- the contours of the slots circumscribe the sides of the slats that will later be bent. Slats of this type preferably have an approximately rectangular, strip-like shape. The size of the possible coverings depends on the width of the edge strips provided.
- a method of this type for producing outside air grilles is very quick and inexpensive. By using a single sheet there is hardly any waste so that an enormous saving in raw materials is guaranteed. Since there are no individual parts that have to be welded, glued or screwed, on the one hand a considerable part of the energy costs are eliminated, and on the other hand there is no need for expensive machines that would be necessary for the production of the individual parts.
- the saving in the number of work steps also reduces the risk of injury and thus injury-related lost work, which also has an impact on other process technologies.
- an outside air grille R has a flat sheet 1, from the plane of which rectangular slats 3 are preferably bent out. These fins 3 are produced by an embossing and subsequent stamping process and a subsequent bending.
- bend lines 4 are embossed into the sheet metal, which define the connection of the lamellae 3 to the sheet metal 1.
- the three free sides of the slats 3 are then produced by a punching process, a U-shaped slot 2 being cut into the sheet metal 1 by this punching process. This U-shaped slot 2 is closed by the crease line 4.
- the slats 3 slotted on three sides are pressed with a special tool in a corresponding manufacturing process in the direction x and bent at a predetermined angle w to the plane of the sheet 1.
- the angle w at which the lamellae 3 protrude from the plane of the steel sheet 1 can be determined in each case before machining.
- the folding tool can be adjusted accordingly.
- edge strips 7 are also preferably bent at an angle v that can also be predetermined.
- fold lines 5 are stamped into the edge 1 of the sheet metal, each of which marks an edge strip 7.
- Special tools can then also be folded the edge strips 7 at the same time.
- the outside air grille R thus produced is placed in a further work step, a connecting piece 8 to an air guide system, not shown in detail.
- the outside air grille R is fastened via fastening elements, not shown, such as screws, rivets, clips or the like.
- the connecting piece 8 itself is housing-shaped, the outside air grille R abutting a circumferential flange 9. Side walls 10 run from this flange 9 to a rear wall 11 which, as is only indicated schematically, has corresponding passages 12.
- the design of these passages 12 is at the discretion of the user, and these passages can be slot-shaped, perforated plate-like or can also be covered with lamellae.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Duct Arrangements (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Inert Electrodes (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen eines Außenluftgitters mit Lamellen, welches den Abschluß eines Luftleitsystems bildet, sowie ein entsprechendes Außenluftgitter.The invention relates to a method for producing an outside air grille with fins, which forms the end of an air guidance system, and a corresponding outside air grille.
Außenluftgitter dieser Art sind bekannt und vom Markt in den verschiedensten Ausführungsformen und Arten angeboten. Solche Außenluftgitter unterscheiden sich vor allem in der Größe, Anordnung und Anzahl der zugeordneten Lamellen in einem entsprechenden Rahmen. So gibt es beispielsweise Außenluftgitter mit wenigen breiten Lamellen oder solche mit eher schmalen und dafür vielen Lamellen.Outdoor air grilles of this type are known and are available in a wide variety of designs and types from the market. Such outside air grilles differ primarily in the size, arrangement and number of the assigned slats in a corresponding frame. For example, there are outside air grilles with a few wide fins or those with a rather narrow and therefore many fins.
Des weiteren sind Außenluftgitter bekannt, deren Lamellen verstellbar sind, während bei anderen die Lamellen fest angeordnet sind. In ihrer Grundkonzeption, insbesondere in ihrer Bauweise, sind solche Außenluftgitter, ob mit verstellbaren oder mit festen Lamellen, ähnlich. Die Rahmen für solche Außenluftgitter werden aus einzelnen Stücken zusammengebaut und anschließend die einzelnen vorher gestanzten, geschnittenen oder sonstwie hergestellten Lamellen in die Rahmen eingesetzt. Das Zusammensetzen der Rahmen sowie das Einbringen von festen Lamellen geschieht dabei insbesondere durch Schweißen. Für verstellbare Lamellen sind Lagerstellen notwendig.Outside air grilles are also known, the slats of which are adjustable, while in others the slats are fixed. In their basic concept, especially in their construction, such outside air grilles, whether with adjustable or with fixed slats, are similar. The frames for such outside air grilles are assembled from individual pieces and then the individual previously punched, cut or otherwise manufactured slats are inserted into the frames. The assembly of the frames and the introduction of fixed slats is done in particular by welding. Bearing points are necessary for adjustable slats.
Ein Verfahren dieser Art ist nicht nur umständlich, sondern zeitraubend und kostenintensiv. Umständlich deshalb, weil mehrere Verfahrensschritte notwendig sind, wie beispielsweise Stanzen, Schweißen und dgl., kostenintensiv durch den dafür notwendigen Arbeitsaufwand sowie durch einen relativ hohen Abfallanfall bei den einzelnen Fertigungen. Ebenso ist ein solches Verfahren enorm energieverschwendend und dadurch umweltbelastend.A method of this kind is not only cumbersome, but also time-consuming and costly. This is cumbersome because several process steps are necessary, such as punching, welding and the like. It is cost-intensive due to the work required for this and due to a relatively high amount of waste in the individual productions. Such a process is also extremely energy-wasting and therefore polluting the environment.
Umweltbelastungen entstehen auch durch das beim Schweißen freiwerdende Gas, sowie vor allem jedoch durch die Art der zu wählenden Lackierung bzw. Lackierverfahren, welche durch das Vorhandensein von Ecken, Kanten und Schweißnähten nur möglich ist.Environmental pollution also arises from the gas released during welding, but above all from the type of painting or painting process to be selected, which is only possible due to the presence of corners, edges and weld seams.
Energieverschwendend ist das Verfahren durch die für die verschiedenen Stanzungen sowie für die Schweißapparate notwendige Energie und durch den Energieverbrauch der für das Betreiben der bei solchen Arbeiten vorgeschriebenen Absaugeinrichtungen notwendig wird.The process is energy-wasting due to the energy required for the various punchings as well as for the welding apparatus and due to the energy consumption necessary for operating the suction devices prescribed for such work.
Neben den wirtschaftlichen Gesichtspunkten wegen deren hohen Arbeitskosten, sind vor allem auch die Umweltbelastungen und die Energieverschwendungen Faktoren, die in einer Zeit einer erhöhten Sensibilisierung für die Umwelt verbesserungswürdig sind.In addition to the economic aspects due to their high labor costs, environmental pollution and energy waste are factors that need to be improved in a time of increased awareness of the environment.
Der Erfinder hat sich zur Aufgabe gestellt, ein Verfahren zur Herstellung eines Außenluftgitters zu schaffen, welches sich kostengünstiger, umweltschonender und energiesparender durchführen läßt.The inventor has set himself the task of creating a method for producing an outside air grille which can be carried out in a more cost-effective, environmentally friendly and energy-saving manner.
Zur Lösung dieser Aufgabe führt, daß ein Blech, insbesondere ein Stahlbech, von der Größe des späteren Außenluftgitters zugeschnitten wird, daß sodann in das Blech Knicklinien als eine Seite der Lamellen eingeprägt werden, daß dann Schlitze, welche die anderen Seiten der Lamellen umschreiben, ausgeschnitten bzw. -gestanzt werden und daß in einer weiteren Arbeitsstufe jede Lamelle um die Knicklinie in einem Winkel abgewinkelt wird.The solution to this problem is that a sheet, in particular a steel sheet, is cut to the size of the later external air grille, then kink lines are embossed into the sheet as one side of the lamellae, and then slots which circumscribe the other sides of the lamellae are cut out be punched and punched and that in a further working step each lamella is angled at an angle around the fold line.
Zur Herstellung wird ein Stahlblech, ein Blech od. dgl. bzw. eine Platte eines gewünschten Materials benötigt, welches in einen Konturen der Form des späteren Auslaßgitters entspricht, wobei ggfs. randseitig noch soviel Material berücksichtigt wird, wie für die spätere Abkantung eines Randstreifens notwendig ist.A steel sheet, a sheet metal or the like or a plate of a desired material is required for the production, which corresponds in contours to the shape of the later outlet grille, with as much material being taken into account on the edge as is necessary for the later folding of an edge strip is.
Dieses Blech wird dann mittels eines besonderen und speziellen Fertigungsverfahren, an den Verbindungsstellen von Lamellen und Blech geprägt, die übrige Kontur ausgeschnitten bzw. gestanzt und nötigenfalls ausgeeckt. Die Konturen der Schlitze umschreiben dabei die Seiten der später abzuwinkelnden Lamellen. Lamellen dieser Art haben bevorzugt eine etwa rechtwinklige, streifenförmige Form. Die Größe der eventuellen Auseckungen richtet sich nach der Breite der vorgesehenen Randstreifen.This sheet is then embossed by means of a special and special manufacturing process, at the connection points of lamella and sheet, the remaining contour is cut out or punched and, if necessary, licked out. The contours of the slots circumscribe the sides of the slats that will later be bent. Slats of this type preferably have an approximately rectangular, strip-like shape. The size of the possible coverings depends on the width of the edge strips provided.
In einem weiteren Arbeitsschritt werden mit einem speziell dafür vorgesehenen Werkzeug die ausgestanzten Lamellen sowie ggfs. die Randstreifen um die jeweiligen Präge- bzw. Knicklinien abgewinkelt. Das Spezialwerkzeug ist so einstellbar, daß sowohl der Winkel, in welchem die Lamellen abgewinkelt sein sollen, als auch der Winkel in welchem die Randstreifen abgekantet sein sollen, zuvor einstellbar ist.In a further step, the punched-out slats and, if necessary, the edge strips are angled around the respective embossing or crease lines using a specially provided tool. The special tool is adjustable so that both the angle at which the slats are to be angled and the angle at which the edge strips are to be bent can be set beforehand.
Bevorzugt im Arbeitsschritt Stanzen sind zudem Löcher bzw. Bohrungen für die Aufnahme von Befestigungselementen anbringbar.In the stamping step, holes or bores can also be made for receiving fastening elements.
Ein Verfahren dieser Art zur Herstellung von Außenluftgittern ist sehr schnell und kostengünstig. Durch das Verwenden eines einzigen Bleches entsteht kaum Abfall so daß dadurch eine enorme Rohstoffeinsparung gewährleistet ist. Da es keine Einzelteile gibt, welche verschweißt, verklebt oder verschraubt werden müssen, entfallen einerseits ein erheblicher Teil der Energiekosten, andererseits kann auf teure Maschinen, welche für die Fertigung der einzelnen Teile notwendig wären, verzichtet werden.A method of this type for producing outside air grilles is very quick and inexpensive. By using a single sheet there is hardly any waste so that an enormous saving in raw materials is guaranteed. Since there are no individual parts that have to be welded, glued or screwed, on the one hand a considerable part of the energy costs are eliminated, and on the other hand there is no need for expensive machines that would be necessary for the production of the individual parts.
Neben der Einsparung an Arbeitszeit verringert sich durch die Einsparung der Arbeitsschritte ebenso die Verletzungsgefahr und somit verletzungsbedinte Arbeitsausfälle, welche bei anderen Verfahrenstechniken ebenfalls zu Buche schlagen.In addition to the saving in working time, the saving in the number of work steps also reduces the risk of injury and thus injury-related lost work, which also has an impact on other process technologies.
Dadurch, daß bei einem solchen Fertigungsverfahren weder Schweißnähte, Verklebungen od. dgl. auftreten, läßt sich ein so gefertigtes Außenluftgitter beispielsweise durch Pulverbeschichtungen lackieren.Because no weld seams, gluing or the like occur in such a manufacturing process, an outside air grille manufactured in this way can be painted, for example, by powder coatings.
Dadurch, daß bei einem solchen Fertigungsverfahren weder Schweißnähte, Verklebungen od. dgl. auftreten, läßt sich ein so gefertigtes Außenluftgitter beispielsweise durch Pulverbeschichtungen lackieren. Ein Verfahren, welches ebenfalls umweltschonend ist, da gegenüber dem herkömmlichen Sprühlackieren bedeutend weniger Dämpfe bzw. Gase freiwerden. Durch das Fehlen von Verschweißungen, Verklebungen od. dgl. und somit durch eine homogene farbbeschichtete Oberfläche, ist gleichzeitig eine qualitative Aufwertung eines entsprechenden Außenluftgitters gewährleistet.Because no weld seams, gluing or the like occur in such a manufacturing process, an outside air grille manufactured in this way can be painted, for example, by powder coatings. A process that is also environmentally friendly, as compared to conventional spray painting, significantly fewer vapors or gases are released. Due to the absence of welds, gluing or the like and thus through a homogeneous color-coated surface, a qualitative upgrade of a corresponding outside air grille is guaranteed at the same time.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung geben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels sowie anhand der Zeichnung; diese zeigt in
- Figur 1
- eine teilweise dargestellte Draufsicht auf ein Außenluftgitter;
Figur 2- einen Länsschnitt durch das Außenluftgitter entlang Linie II-II in Figur 1.
- Figure 1
- a partially shown plan view of an outside air grille;
- Figure 2
- a longitudinal section through the outside air grille along line II-II in Figure 1.
Gemäß Figur 1 weist ein Außenluftgitter R ein planes Blech 1 auf, aus dessen Ebene bevorzugt rechteckige Lamellen 3 ausgebogen sind. Diese Lamellen 3 sind durch einen Präge- und nachfolgenden Stanzvorgang sowie ein anschließendes Ausbiegen erzeugt. In einem ersten Arbeitsschritt werden dem Blech 1 Knicklinien 4 eingeprägt, welche die Verbindung der Lamellen 3 mit dem Blech 1 definieren. Danach erfolgt ein Herstellen der drei freien Seiten der Lamellen 3 durch einen Stanzvorgang, wobei durch diesen Stanzvorgang ein U-förmiger Schlitz 2 in das Blech 1 eingeschnitten wird. Dieser U-förmige Schlitz 2 wird von der Knicklinie 4 abgeschlossen.According to FIG. 1, an outside air grille R has a flat sheet 1, from the plane of which
In einem weiteren Arbeitsschritt werden die an drei Seiten geschlitzten Lamellen 3 mit einem Spezialwerkzeug in einem entsprechenden Fertigungsverfahren in Richtung x gedrückt und in einem vorbestimmten Winkel w zur Ebene des Bleches 1 abgekantet. Der Winkel w, in welchem die Lamellen 3 von der Ebene des Stahlbleches 1 abragen, ist jeweils vor der Bearbeitung bestimmbar. Das Abkantwerkzeug ist entsprechend einstellbar.In a further step, the
Bevorzugt während den gleichen Arbeitsschritten werden auch Randstreifen 7 in einem ebenfalls vorbestimmbaren Winkel v abgekantet. Zuerst werden, bevorzugt während des gleichen Prägevorganges der Knicklinien 4, Knicklinien 5 randseitig in das Blech 1 eingeprägt, welche je einen Randstreifen 7 markieren. Mit dem o.g. Spezialwerkzeug können dann auch gleichzeitig die Randstreifen 7 abgekantet werden. Selbstverständlich ist es auch denkbar, das Abkanten der Randstreifen 7 in einem eigenen Arbeitsschritt durchzuführen.During the same work steps,
Damit die Randstreifen 7 in ihren seitlichen Eckbereichen wieder aufeinander treffen und geschlossen werden können, sollte dieser Eckbereich in einem gewünschten Umfang ausgeeckt werden.So that the
Das so gefertigte Außenluftgitter R wird in einem weiteren Arbeitsschritt einen Anschlußstutzen 8 an ein nicht näher gezeigtes Luftleitsystem aufgesetzt. Die Befestigung des Außenluftgitters R geschieht über nicht näher dargestellte Befestigungselemente, wie beispielsweise Schrauben, Nieten, Spangen od. dgl..The outside air grille R thus produced is placed in a further work step, a connecting
Der Anschlußstutzen 8 selbst ist gehäuseförmig ausgebildet, wobei das Außenluftgitter R einem umlaufenden Flansch 9 anliegt. Von diesem Flansch 9 verlaufen Seitenwände 10 zu einer Rückwand 11, welche, wie dies nur schematisch angedeutet ist, entsprechende Durchlässe 12 besitzt. Die Ausgestaltung dieser Durchlässe 12 ist in das Belieben des Benutzers gestellt, wobei diese Durchlässe schlitzförmig, lochblechartig oder ebenfalls mit Lamellen besetzt sein können.
Claims (6)
dadurch gekennzeichnet,
daß ein Blech, insbesondere ein Stahlbech, von der Größe des späteren Außenluftgitters zugeschnitten wird, daß sodann in das Blech Knicklinien als eine Seite der Lamellen eingeprägt werden, daß dann Schlitze, welche die anderen Seiten der Lamellen umschreiben, ausgeschnitten bzw. -gestanzt werden und daß in einer weiteren Arbeitsstufe jede Lamelle um die Knicklinie in einem Winkel abgewinkelt wird.Process for producing an outside air grille with fins, which forms the end of an air guidance system,
characterized,
that a sheet, in particular a steel sheet, is cut to the size of the later external air grille, that then fold lines are embossed into the sheet as one side of the lamellae, that slots which circumscribe the other sides of the lamellae are then cut out or punched out and that in a further work step each slat is angled at an angle around the fold line.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4038691 | 1990-12-05 | ||
| DE4038691A DE4038691A1 (en) | 1990-12-05 | 1990-12-05 | Slatted air grille production method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0489355A2 true EP0489355A2 (en) | 1992-06-10 |
| EP0489355A3 EP0489355A3 (en) | 1992-08-12 |
| EP0489355B1 EP0489355B1 (en) | 1994-09-14 |
Family
ID=6419577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91120346A Expired - Lifetime EP0489355B1 (en) | 1990-12-05 | 1991-11-28 | Method of producing an outer air grid |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0489355B1 (en) |
| AT (1) | ATE111384T1 (en) |
| DE (2) | DE4038691A1 (en) |
| ES (1) | ES2062646T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180566A (en) * | 2018-02-09 | 2018-06-19 | 厦门合立道工程设计集团股份有限公司 | A kind of metallic carved bending ventilation Decorative Cover and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4239050A1 (en) * | 1992-11-20 | 1994-05-26 | Schako Metallwarenfabrik | Method for producing housing for part of air guidance system - involves flanged inner walls with slot in one wall and splicing strips on other, flanges having outer strips to abut or overlap splicing strips |
| DE4404522A1 (en) * | 1994-02-12 | 1995-08-17 | Schako Metallwarenfabrik | Method of manufacturing room air outlet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2703045A (en) * | 1950-12-16 | 1955-03-01 | American Optical Corp | Projector housing louver construction |
| US3203079A (en) * | 1961-01-26 | 1965-08-31 | Smith | Method of making louvered ventilator |
| DE1229197B (en) * | 1961-11-03 | 1966-11-24 | Philips Nv | Blind-like electrode for an electron multiplier and electron multiplier provided with two or more such electrodes |
| DE2916331A1 (en) * | 1979-04-23 | 1980-11-13 | Alfred Korsch | Lamp shade for strip lighting - is made from aluminium strip with transverse tongues bent to v=shaped cross=section |
-
1990
- 1990-12-05 DE DE4038691A patent/DE4038691A1/en not_active Withdrawn
-
1991
- 1991-11-28 DE DE59102933T patent/DE59102933D1/en not_active Expired - Fee Related
- 1991-11-28 AT AT91120346T patent/ATE111384T1/en not_active IP Right Cessation
- 1991-11-28 ES ES91120346T patent/ES2062646T3/en not_active Expired - Lifetime
- 1991-11-28 EP EP91120346A patent/EP0489355B1/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2703045A (en) * | 1950-12-16 | 1955-03-01 | American Optical Corp | Projector housing louver construction |
| US3203079A (en) * | 1961-01-26 | 1965-08-31 | Smith | Method of making louvered ventilator |
| DE1229197B (en) * | 1961-11-03 | 1966-11-24 | Philips Nv | Blind-like electrode for an electron multiplier and electron multiplier provided with two or more such electrodes |
| DE2916331A1 (en) * | 1979-04-23 | 1980-11-13 | Alfred Korsch | Lamp shade for strip lighting - is made from aluminium strip with transverse tongues bent to v=shaped cross=section |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180566A (en) * | 2018-02-09 | 2018-06-19 | 厦门合立道工程设计集团股份有限公司 | A kind of metallic carved bending ventilation Decorative Cover and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4038691A1 (en) | 1992-06-11 |
| EP0489355A3 (en) | 1992-08-12 |
| ATE111384T1 (en) | 1994-09-15 |
| EP0489355B1 (en) | 1994-09-14 |
| ES2062646T3 (en) | 1994-12-16 |
| DE59102933D1 (en) | 1994-10-27 |
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