EP0104344B1 - Electric wire heating element and method of making it - Google Patents

Electric wire heating element and method of making it Download PDF

Info

Publication number
EP0104344B1
EP0104344B1 EP83107098A EP83107098A EP0104344B1 EP 0104344 B1 EP0104344 B1 EP 0104344B1 EP 83107098 A EP83107098 A EP 83107098A EP 83107098 A EP83107098 A EP 83107098A EP 0104344 B1 EP0104344 B1 EP 0104344B1
Authority
EP
European Patent Office
Prior art keywords
heating element
supporting plates
air
wire heating
stream
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
Application number
EP83107098A
Other languages
German (de)
French (fr)
Other versions
EP0104344A1 (en
Inventor
Dieter B. Dr. Knoll
Manfred Klawuhn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
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 Braun GmbH filed Critical Braun GmbH
Publication of EP0104344A1 publication Critical patent/EP0104344A1/en
Application granted granted Critical
Publication of EP0104344B1 publication Critical patent/EP0104344B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base

Definitions

  • the invention relates to a method for producing an electrical wire heating element according to the preamble of claim 1. Furthermore, the invention relates to a wire heating element which can be produced by this method.
  • EP-A1-38414 describes the production of an electrical wire heating element according to the preamble of claim 1. This wire heating element is based on the problem of ensuring optimal flow conditions for effective air heating. However, an optimization of the wire heating element with regard to its longitudinal expansion with a predetermined number of windings and a predetermined winding spacing is not addressed in this publication.
  • An electrical wire heating element is known (DE-A-1 540731), the heating conductor of which is attached to a heating conductor carrier consisting of star-shaped or cruciformly arranged plate-shaped carrier elements made of heat-resistant insulating material, the carrier elements being provided by at least one end face of at least one carrier element in each case Flat sheet-encompassing and thus pressed, cross-sectionally U-shaped retaining plate are connected to one another.
  • This known wire heating element has the disadvantage that its heating conductor winding takes up a relatively large amount of space, since the individual heating conductor windings cannot be wound as tightly as desired for safety reasons, and on the other hand has the disadvantage of being relatively expensive to manufacture, since the U -shaped retaining plates make assembly more expensive.
  • heating conductor carriers consisting of two or more carrier plates are also known, in which the carrier plates have slots.
  • the individual, slotted plates are pushed into one another and fixed in an end position predetermined by the slot length. Moving the carrier plates against each other after the winding process has ended is not provided.
  • the invention has for its object to provide a method for producing an electrical wire heating element that allows a particularly tight and thus space-saving winding of the heating conductor. Furthermore, an electrical wire heating element is to be created which does not require any special holding plates.
  • the first-mentioned object is achieved by the method according to claim 1.
  • This method has the advantage that the winding can be carried out in such a way that the safety distances between the individual windings can be well maintained, but the winding is then shortened in such a way that the overall length of the wire heating element is significantly reduced without the distances between them change the individual windings.
  • the dimension a i by which the one carrier plate is displaced in the longitudinal direction relative to the next carrier plate expediently corresponds to the distance b by which the one heating conductor coil is separated from the adjacent heating conductor coil divided by the number of carrier plates reduced by 1.
  • An electrical wire heating element produced by the method according to the invention is advantageously characterized by the features of claim 2.
  • all carrier plates have pairs of tabs which extend transversely to the air flow direction and engage in openings or slots. which are arranged in the adjacent carrier plate, the length of the openings or slots being a multiple of the width of a tab.
  • One support plate with the inner longitudinal edge is advantageously arranged vertically on the side surface of the adjacent support plate facing it, with all support plates together in the joint area with their inner plate sections enclosing a prismatic space with a square cross section.
  • the individual carrier plates 21, 22, 23, 24 in the exemplary embodiment according to FIG. 3 are provided with tabs 17, 18 which are in slots 19, 20 engage that support plate 21, 22, 23, 24, which is arranged perpendicular to this support plate. If this anchoring between the different pairs of tabs 17, 18 and slots 19, 20 takes place in the sense indicated by arrows in FIG. 3, the four carrier plates 21, 22, 23, 24 are firmly nested.

Landscapes

  • Resistance Heating (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines elektrischen Drahtheizelements gemäss der Gattung des Anspruchs 1. Weiterhin betrifft die Erfindung ein Drahtheizelement, welches nach diesem Verfahren herstellbar ist.The invention relates to a method for producing an electrical wire heating element according to the preamble of claim 1. Furthermore, the invention relates to a wire heating element which can be produced by this method.

In der EP-A1-38414 ist die Herstellung eines elektrischen Drahtheizelementes nach dem Oberbegriff des Anspruchs 1 beschrieben. Diesem Drahtheizelement liegt die Problematik zugrunde, optimale Strömungsverhältnisse für eine effektive Lufterwärmung zu gewährleisten. Eine Optimierung des Drahtheizelementes bezüglich seiner Längsausdehnung bei vorgegebener Wicklungszahl und vorgegebenem Wicklungsabstand wird in dieser Veröffentlichung jedoch nicht angesprochen.EP-A1-38414 describes the production of an electrical wire heating element according to the preamble of claim 1. This wire heating element is based on the problem of ensuring optimal flow conditions for effective air heating. However, an optimization of the wire heating element with regard to its longitudinal expansion with a predetermined number of windings and a predetermined winding spacing is not addressed in this publication.

Es ist ein elektrisches Drahtheizelement bekannt (DE-A-1 540731), dessen Heizleiter auf einem aus stern- oder kreuzförmig zueinander angeordneten plattenförmigen Trägerelementen aus wärmebeständigem Isoliermaterial bestehenden Heizleiterträger angebracht ist, wobei die Trägerelemente durch mindestens je ein jede Stirnseite mindestens eines Trägerelementes nach beiden Flachseiten umgreifendes und damit verpresstes, im Querschnitt U-förmiges Halteblech miteinander verbunden sind. Dieses bekannte Drahtheizelement hat den Nachteil, dass seine HeizleiterWicklung einen relativ grossen Platzbedarf aufweist, da die einzelnen Heizleiter-Windungen aus Sicherheitsgründen nicht beliebig eng gewickelt werden können, und hat zum anderen den Nachteil, relativ teuer in der Herstellung zu sein, da besonders die U-förmigen Haltebleche die Montage verteuern.An electrical wire heating element is known (DE-A-1 540731), the heating conductor of which is attached to a heating conductor carrier consisting of star-shaped or cruciformly arranged plate-shaped carrier elements made of heat-resistant insulating material, the carrier elements being provided by at least one end face of at least one carrier element in each case Flat sheet-encompassing and thus pressed, cross-sectionally U-shaped retaining plate are connected to one another. This known wire heating element has the disadvantage that its heating conductor winding takes up a relatively large amount of space, since the individual heating conductor windings cannot be wound as tightly as desired for safety reasons, and on the other hand has the disadvantage of being relatively expensive to manufacture, since the U -shaped retaining plates make assembly more expensive.

Aus der DE-A-2 128 157 bzw. der US-A-1 490 088 sind darüber hinaus aus zwei oder mehreren Trägerplatten bestehende Heizleiterträger bekannt, bei denen die Trägerplatten Schlitze aufweisen. Zum Zusammenbau des Heizleiterträgers werden die einzelnen, geschlitzten Platten in eine durch die Schlitzlänge vorgegebene Endposition ineinander geschoben und fixiert. Ein Verschieben der Trägerplatten gegeneinander nach Beendigung des Bewicklungsvorganges ist nicht vorgesehen.From DE-A-2 128 157 and US-A-1 490 088, heating conductor carriers consisting of two or more carrier plates are also known, in which the carrier plates have slots. To assemble the heating conductor carrier, the individual, slotted plates are pushed into one another and fixed in an end position predetermined by the slot length. Moving the carrier plates against each other after the winding process has ended is not provided.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung eines elektrischen Drahtheizelementes zu schaffen, das eine besonders enge und damit platzsparende Wicklung des Heizleiters erlaubt. Weiterhin soll ein elektrisches Drahtheizelement geschaffen werden, das ohne besondere Haltebleche auskommt.The invention has for its object to provide a method for producing an electrical wire heating element that allows a particularly tight and thus space-saving winding of the heating conductor. Furthermore, an electrical wire heating element is to be created which does not require any special holding plates.

Nach der Erfindung wird die erstgenannte Aufgabe durch das Verfahren gemäss Anspruch 1 gelöst.According to the invention, the first-mentioned object is achieved by the method according to claim 1.

Dieses Verfahren hat den Vorteil, dass die Bewicklung so durchgeführt werden kann, dass die Sicherheitsabstände zwischen den einzelnen Wicklungen gut einzuhalten sind, wobei aber anschliessend die Bewicklung so verkürzt wird, dass die Gesamtlänge des Drahtheizelementes sich deutlich verkleinert, ohne dass sich gleichzeitig die Abstände zwischen den einzelnen Wicklungen verändern.This method has the advantage that the winding can be carried out in such a way that the safety distances between the individual windings can be well maintained, but the winding is then shortened in such a way that the overall length of the wire heating element is significantly reduced without the distances between them change the individual windings.

Zweckmässigerweise entspricht das Mass ai, um das jeweils die eine Trägerplatte gegenüber der nächsten Trägerplatte in Längsrichtung verschoben ist, dem Abstand b, um den jeweils der eine Heizleiterwickel vom benachbarten Heizleiterwickel entfernt ist, dividiert durch die um 1 reduzierte Trägerplattenanzahl.The dimension a i by which the one carrier plate is displaced in the longitudinal direction relative to the next carrier plate expediently corresponds to the distance b by which the one heating conductor coil is separated from the adjacent heating conductor coil divided by the number of carrier plates reduced by 1.

Auf diese Weise ist es also möglich, bei jedem derart gewickelten Drahtheizelement mit kreuz-oder sternförmig zueinander angeordneten Trägerplatten nach dem Bewicklungsvorgang die Gesamtlänge des Drahtheizelements um ca. einen Wickelabstand eines Heizleiters zu verringern.It is thus possible in this way to reduce the total length of the wire heating element by approximately one winding distance of a heating conductor for each wire heating element with carrier plates arranged in a cross or star shape with respect to one another after the winding process.

Ein nach dem erfindungsgemässen Verfahren hergestelltes elektrisches Drahtheizelement zeichnet sich vorteilhaft durch die Merkmale des Anspruchs 2 aus.An electrical wire heating element produced by the method according to the invention is advantageously characterized by the features of claim 2.

Damit sichergestellt ist, dass alle Trägerplatten zu einem Wickelkörper zusammenfügbar sind, der in sich steif und fest genug ist, um mit dem Heizleiter bewickelt werden zu können, haben alle Trägerplatten Paare von sich quer zur Luftströmungsrichtung erstreckenden Laschen, die in Öffnungen oder Schlitze eingreifen, die in der jeweils benachbarten Trägerplatte angeordnet sind, wobei die Länge der Öffnungen oder Schlitze ein Mehrfaches der Breite einer Lasche beträgt. Damit erhält man ein Drahtheizelement, das eine Bewicklung mit sehr geringem Wickelabstand ermöglicht und keine Haltebleche an den Stirnseiten benötigt.To ensure that all carrier plates can be joined together to form a winding body which is inherently stiff and strong enough to be able to be wound with the heating conductor, all carrier plates have pairs of tabs which extend transversely to the air flow direction and engage in openings or slots. which are arranged in the adjacent carrier plate, the length of the openings or slots being a multiple of the width of a tab. This results in a wire heating element that enables winding with a very small winding distance and does not require any holding plates on the end faces.

Mit Vorteil ist jeweils die eine Trägerplatte mit der innen liegenden Längskante lotrecht auf der ihr zugekehrten Seitenfläche der benachbarten Trägerplatte angeordnet, wobei alle Trägerplatten zusammen im Stossbereich mit ihren innenliegenden Plattenabschnitten einen prismatischen Raum mit quadratischem Querschnitt einschliessen.One support plate with the inner longitudinal edge is advantageously arranged vertically on the side surface of the adjacent support plate facing it, with all support plates together in the joint area with their inner plate sections enclosing a prismatic space with a square cross section.

Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Es zeigt:

  • Figur 1 ein elektrisches Drahtheizelement (in perspektivischer Darstellung) mit vier winklig aufeinanderstossenden Trägerplatten, wobei die einzelnen Trägerplatten in Längsrichtung gegeneinander verschoben angeordnet sind (Anordnung beim Bewickeln);
  • Figur 2 das Drahtheizelement nach Figur 1, bei dem jedoch die einzelnen Trägerplatten so verschoben sind, dass ihre dem Luftstrom zugekehrten vorderen Kanten in gleicher Höhe liegen (fertiges Drahtheizelement);
  • Figur 3 eine «Explosionszeichnung» eines aus vier Trägerplatten zusammensteckbaren Drahtheizelementes;
  • Figur 4 eine einzige Trägerplatte in perspektivischer Ansicht des Drahtheizelements gemäss Figur 3;
  • Figur 5 die Frontansicht (in Luftströmungsrichtung gesehen) des Drahtheizelements gemäss Figur 3;
  • Figur 6 die Anordnung zweier Trägerplatten zueinander in perspektivischer Ansicht.
The invention is explained in more detail below with the aid of drawings which illustrate only one embodiment. It shows:
  • 1 shows an electrical wire heating element (in a perspective view) with four support plates which abut one another at an angle, the individual support plates being arranged so as to be displaced in relation to one another in the longitudinal direction (arrangement during winding);
  • Figure 2 shows the wire heating element of Figure 1, but in which the individual carrier plates are displaced so that their front edges facing the air flow are at the same height (finished wire heating element);
  • FIG. 3 shows an “exploded view” of a wire heating element that can be plugged together from four carrier plates;
  • FIG. 4 shows a single carrier plate in a perspective view of the wire heating element according to FIG. 3;
  • 5 shows the front view (seen in the direction of air flow) of the wire heating element according to FIG. 3;
  • Figure 6 shows the arrangement of two carrier plates to each other in a perspective view.

Das Drahtheizelement nach Figur 1 besteht aus vier Trägerplatten 1, 2, 3, 4, die sternförmig zueinander angeordnet sind, wobei zum Zwecke der Umwicklung der Trägerplatten mit dem Heizleiter 5 die Trägerplatten 2, 3 und 4 gegenüber der Trägerplatte 1 in Luftströmungsrichtung B verschoben sind. Es ist dabei die Trägerplatte 2 gegenüber der Trägerplatte 1 um das Mass ai, die Trägerplatte 3 gegenüber der Trägerplatte 1 um das Mass 2 x a1 (= a2) und die Trägerplatte 4 gegenüber der Trägerplatte 1 um das Mass 3 x a1 (= a3) verschoben.The wire heating element according to Figure 1 consists of four carrier plates 1, 2, 3, 4, which are arranged in a star shape to one another, wherein for the purpose of wrapping the carrier plates with the heating conductor 5, the carrier plates 2, 3 and 4 are displaced relative to the carrier plate 1 in the air flow direction B. . It is the carrier plate 2 relative to the carrier plate 1 by the dimension a i , the carrier plate 3 relative to the carrier plate 1 by the dimension 2 xa 1 (= a 2 ) and the carrier plate 4 relative to the carrier plate 1 by the dimension 3 xa 1 (= a 3 ) postponed.

Werden nun, wie dies Figur 2 zeigt, alle Trägerplatten 1, 2, 3, 4 nach dem Bewickeln so verschoben (entgegen Pfeilrichtung B), dass sich ihre vorderen, dem Luftstrom zugekehrten Kanten 6, 7, 8, 9 auf gleicher Ebene befinden, also bündig abschliessen, so verschieben sich die Flankenlager f2, f3, f4, an denen der Heizleiter 5 die radial aussen liegenden Kanten der Trägerplatten 2, 3, 4 berührt, entgegen Pfeilrichtung B zur Kante 6 hin, und die Gesamtlänge L des Drahtheizelements verkürzt sich auf die Länge L.If, as shown in FIG. 2, all carrier plates 1, 2, 3, 4 are then moved after winding (in the opposite direction to arrow B) so that their front edges 6, 7, 8, 9 facing the air flow are on the same level, So close flush, the flank bearings f2, f3, f4, on which the heating conductor 5 touches the radially outer edges of the carrier plates 2, 3, 4, move in the opposite direction of the arrow B to the edge 6, and the overall length L of the wire heating element is shortened to length L.

Um eine preiswerte Befestigung der einzelnen Trägerplatten aneinander in dem in den Figuren 1 und 2 dargestellten Schema zu schaffen, sind die einzelnen Trägerplatten 21, 22, 23, 24 beim Ausführungsbeispiel nach Figur 3 mit Laschen 17, 18 versehen, die in Schlitze 19, 20 derjenigen Trägerplatte 21, 22, 23, 24 eingreifen, die jeweils lotrecht zu dieser Trägerplatte angeordnet ist. Wenn diese Verankerung zwischen den verschiedenen Paaren von Laschen 17, 18 und Schlitzen 19, 20 in dem in Figur 3 durch Pfeile angedeuteten Sinn erfolgt, ergibt sich eine feste Verschachtelung der vier Trägerplatten 21, 22, 23, 24.In order to create an inexpensive fastening of the individual carrier plates to one another in the scheme shown in FIGS. 1 and 2, the individual carrier plates 21, 22, 23, 24 in the exemplary embodiment according to FIG. 3 are provided with tabs 17, 18 which are in slots 19, 20 engage that support plate 21, 22, 23, 24, which is arranged perpendicular to this support plate. If this anchoring between the different pairs of tabs 17, 18 and slots 19, 20 takes place in the sense indicated by arrows in FIG. 3, the four carrier plates 21, 22, 23, 24 are firmly nested.

Beim Zusammenfügen der vier Trägerplatten 21, 22, 23, 24 werden die einzelnen Platten nach Art einer aufsteigenden Schraube angeordnet, was dadurch ermöglicht wird, dass die Schlitze 19, 20, ... alle so lang ausgebildet sind (1 = 4 x d), dass die Laschen 17, 18 ... in diesen Schlitzen verschiebbar sind. Nach dem Bewickeln werden die Trägerplatten so weit zurückverschoben, dass die Laschen 17, 18 ... mit ihren vorderen Kanten an den vorderen Kanten der Schlitze 19, 20 ... anliegen.When the four carrier plates 21, 22, 23, 24 are joined together, the individual plates are arranged in the manner of an ascending screw, which is made possible by the fact that the slots 19, 20, ... are all made so long (1 = 4 xd), that the tabs 17, 18 ... are slidable in these slots. After wrapping, the carrier plates are pushed back so far that the tabs 17, 18 ... rest with their front edges on the front edges of the slots 19, 20 ...

Claims (3)

1. A method of producing an electrical wire heating element for heating a stream of air (B) flowing round the wire heating element, having an element former receiving a heating conductor winding and consisting of a plurality of supporting plates (1, 2, 3, 4) of heat-resistant insulating material of the same shape and edge length disposed in the form of a cross or a star in relation to one another, having a heating conductor (5) in the form of wire which is wound on the supporting plates (1, 2, 3, 4) and is constructed in meandering or zigzag form or in the form of a wave band and which is in contact with radially external edges of the supporting plates (1, 2, 3, 4), wherein the next supporting plate in each case in the direction of winding A is disposed displaced by an amount (a1) in the longitudinal direction of the stream of air (B) in relation to the particular supporting plate disposed in front of it, characterised in that, after being wound with the heating conductor (5), the supporting plates (2, 3, 4) are displaced in the longitudinal direction in relation to one another until their edges (6, 7, 8, 9) facing the stream of air lie in one plane.
2. An electrical wire heating element for heating a stream of air (B) flowing round the wire heating element, having an element former receiving a heating conductor winding and consisting of a plurality of supporting plates (1, 2, 3, 4) of heat-resistant insulating material of the same shape and edge length disposed in the form of a cross or a star in relation to one another, having a heating conductor (5) in the form of wire which extends lengthwise in relation to the direction of the stream of air (B) and is constructed in meandering or zigzag form or in the manner of a wave band and which is in contact with radially external edges of the supporting plates (1, 2, 3, 4), characterised in that the supporting plates (1, 2, 3, 4) comprise pairs of tongues (17, 18, 25, 26) which extend transversely to the direction of flow (B) of the air and which engage in slot-shaped openings (19, 20, 29, 30) which extend longitudinally to the direction of flow (B) of the air and are each formed in the adjacent supporting plate, the length (1) of the slot-shaped openings (19, 20, 29, 30) being a multiple of the width (d) of a tongue (17,18,25, 26).
3. An electrical wire heating element as claimed in claim 2, characterised in that the one supporting plate (1,2,3,4) is disposed with its inner longitudinal edge (12) perpendicular on the adjacent lateral face of the neighbouring supporting plate (2, 3, 4, 1), all the supporting plates (1, 2, 3, 4) together enclosing a prismatic space (11) with a square cross-section with their inner plate portions in the abutment region.
EP83107098A 1982-08-31 1983-07-20 Electric wire heating element and method of making it Expired EP0104344B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3232291 1982-08-31
DE19823232291 DE3232291A1 (en) 1982-08-31 1982-08-31 METHOD FOR PRODUCING AN ELECTRIC WIRE HEATING ELEMENT AND WIRE HEATING ELEMENT, WHICH CAN BE PRODUCED BY THIS METHOD

Publications (2)

Publication Number Publication Date
EP0104344A1 EP0104344A1 (en) 1984-04-04
EP0104344B1 true EP0104344B1 (en) 1987-04-01

Family

ID=6172105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107098A Expired EP0104344B1 (en) 1982-08-31 1983-07-20 Electric wire heating element and method of making it

Country Status (2)

Country Link
EP (1) EP0104344B1 (en)
DE (2) DE3232291A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490088A (en) * 1921-07-14 1924-04-15 Airdry Corp Air heater
US1490089A (en) * 1921-09-28 1924-04-15 Airdry Corp Air heater
DE1540731C3 (en) * 1965-07-02 1973-10-18 Fa. Fritz Eichenauer, 6747 Kandel Electric wire heating element
DE2128157A1 (en) * 1970-08-18 1972-02-24 Suhl Elektrogeraete Veb K Radiators for heating a stream of air, especially for hair dryers
DE3003267A1 (en) * 1980-01-30 1981-09-10 Fa. Friedrich Würth, 7000 Stuttgart Heating element for hair-dryer etc. - is placed in longitudinal channels with frame composed of four insulated plates joined at slits to form channels
DE3014935A1 (en) * 1980-04-18 1981-10-22 Braun Ag, 6000 Frankfurt ELECTRIC WIRE HEATING ELEMENT
DE3031351A1 (en) * 1980-08-20 1982-04-01 Braun Ag, 6000 Frankfurt Combination hot air fan and spray - has heating element support tube with shoulders for heating wire coils held by discharge grille
DE3031373A1 (en) * 1980-08-20 1982-04-01 Braun Ag, 6000 Frankfurt Heater element for hot air fan - has wire supporting mica strips, and forming integral body divided by corresponding number of heating wire coils

Also Published As

Publication number Publication date
DE3370741D1 (en) 1987-05-07
DE3232291A1 (en) 1984-03-01
EP0104344A1 (en) 1984-04-04

Similar Documents

Publication Publication Date Title
EP0236260B1 (en) Building block for construction kits, especially for a toy construction kit
DE3434999C2 (en) Support grid for a suspended ceiling
DE2243034C2 (en) Electrical contact arrangement
DE69003814T2 (en) CONVEYOR BELT.
DE2435074A1 (en) ELECTRIC HEATER WITH OPEN HEATING COIL
DE3603836A1 (en) EDGE-WINDED SHEET PACKAGE, METHOD AND CUT-IN STRIPES FOR THEIR PRODUCTION
DE3144896C2 (en) Electric heater
DE3441970C1 (en) Metal filter foil
EP2987546A1 (en) Filter element for separation of particles from a particle loaded raw flow of gas
EP0104344B1 (en) Electric wire heating element and method of making it
DE102007026908A1 (en) Insulating profile for a multi-pole conductor line
DE2633892A1 (en) Plug and socket connector with spring loaded locking bracket - has adaptor with ring slots transverse to axis with wavy projection on stampings
DE3921277C1 (en)
EP0451507B1 (en) Heat-exchanger
WO2008087067A1 (en) Electrical coil with multiple winding layers
DE2244455A1 (en) DEVICE FOR DISCHARGING ELECTROSTATIC CHARGES
DE3011836C2 (en) Grid plate to form plus and minus plate sets for collector batteries
DE68917337T2 (en) Electrical heating resistor for warm air generators.
DE3227623C1 (en) Connecting device for a radiant heating element, which is preferably insulated by pearls, especially for baking-oven heating
DE3014294C2 (en) Barbed Wire
DE2501003A1 (en) Electrical connector with paddle shaped tubular blades - has ring shaped strips separated by gap bridged by contact blades with curved sides (SW310576)
DE3220456A1 (en) Lamp carrier
DE1532778A1 (en) Bristle strips, as well as preferably cylindrical or frustoconical brushes with at least one such bristle strip
CH435346A (en) Lamellar tube for heating or cooling purposes
DE3015229A1 (en) Conveyor belt made of wire - comprises wire lengths with spiral portions wound round adjacent crossbars

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19840512

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

REF Corresponds to:

Ref document number: 3370741

Country of ref document: DE

Date of ref document: 19870507

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890627

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890630

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19890711

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19890731

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900720

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910403

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST