BE556713A - - Google Patents
Info
- Publication number
- BE556713A BE556713A BE556713DA BE556713A BE 556713 A BE556713 A BE 556713A BE 556713D A BE556713D A BE 556713DA BE 556713 A BE556713 A BE 556713A
- Authority
- BE
- Belgium
- Prior art keywords
- heating conductor
- mold
- welding
- pipe
- possibly
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/3444—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/346—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a coating or being printed, e.g. being applied as a paint or forming a printed circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
- B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
- B29C66/8414—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
- B29C65/3428—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding said at least a single wire having a waveform, e.g. a sinusoidal form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
Description
<Desc/Clms Page number 1>
Drescription Procédé et conducteur chauffant pour confectionner des joints soudés de matières synthétiques thermoplastiques plus spécialement de polyéthylène à haute et basse pres- sion etc....
On connait des procédés d'après lesquels, entre deux objets thermoplastiques à unir par soudure,de la chaleur est pro- voquée au moyen d'uh courant à travers des résistances in- tercalées,ce qui a pour effet de souder ces objets.
Le conducteur chauffant et le procédé suivant l'invention sont cependant caractérisés en ce que,par exemple,des pièces de raccordement de tubes par ex.en polyéthylène, peuvent être soudés de façon simple et sûre pour les dia- mètres de tubes les plus divers(par ex.entre 1/2" - 2") avec le même voltage, dans le même temps de soudage,par ex. par une batterie de 12 volts.Les conducteurs chauffants sont construits de telle façon que,grâce à leur chaleur spécifique,leur résistance électrique spécifique,leur section,leur longueur et surtout leur disposition,ils don- nent chaque fois, avec une tension de 12 volts, dans le même temps,pour des diamètres de tubes ou d'armatures les plus divers, la chaleur qu'il faut pour la dimension du tube, avec la même température de soudure, d'après la valeur red.
ou Grader.Les conducteurs de chaleur sont fabriqués en une matière résistant à la corrosion, aux acides et aux alcalis, pour être employés dans l'industrie chimique.
<Desc/Clms Page number 2>
Grâce à l'emploi de courant faible,il est possible de prélever le courant de chauffage nécessaire d'une batterie transportable ou d'un accumulateur, de sorte que la soudure peut se faire indépendamment d'un raccordement au réseau par ex.sur des chantiers ou en cas de placements de tuyaute- ries à l'extérieur.Il est naturellement possible également de procéder à la soudure hors du réseau,avec un transforma- teur ad équat qui possède un règlage de temps de soudage.
Il est alors, particulièrement indiqué que,conformément à la construction du conducteur chauffant,d'après l'invention, les divers diamètres de tuyaux puissent être soudés en main- tenant un temps de soudage- uniforme.On peut cependant aussi employer avantageusement un montage de soudage muni d'un réglage de temps de soudage automatique,par ex.un interrupteur commandé par une minuterie etc.la procédure de soudage est ainsi à l'abri de fausses manoeuvres,car le soudeur ne peut commettre d'erreurs risquant de brûler le conducteur chauffant de provoquer un assemblage par soudure défectueux,une forma- tion de can@ux,et similaires.
Les diverses largeurs de tuyaux qui sont réunis en groupes de même résistance, dépendant natu- rellement essentiellement des exigences pratiques, de sorte que par ex.les dimensions de tubes qui sont nécessaires dans la construction de conduites d'eau(1/2" à 2") y compris les rac- cordements aux maisons,tombent dans un groupe et que l'on puis- se toujours employer un même temps de soudage pour les dimen- sions en question.
Comme on ne peut compenser sans plus par des fils les différen- ces dans les résistances 'thermiques et que ces fils ont en outre le désavantage d'être flexibles,on propose encore,sui- vant l'invention,d'employer comme conducteurs chauffants,des feuilles d'aluminium,dont les mesures quant à la largeur et l'épaisseur,sont variables dans une large mesure.
Il est tout spécialement avantageux de fixer au préalable les conducteurs chauffants qui consistent en fils ou en feuilles, sous forme d'une douille qui,lors de la procédure d'injection
<Desc/Clms Page number 3>
est tirée sur le noyau de la pièce de raccordement du tuyau et se combine,après l'injection,d'une façon homogène,avec l'armature.Le placement d'une telle douille sur l'extrémité du tuyau,qui est glissée par après dans une pièce de raccor- dement de tuyau,n'est pas recommandé,car pour ceo,les tolé- rances devraient être trop grandes.
Le placement de la douille sur le noyau occasionne diverses difficultés.Le procédé d'après l'invention est en outre ca- ractérisé par le fait que les moules d'injection sont cons-
EMI3.1
truis de 'Ueilé f13.çêJfi que lés 11.ey@U* àÊ meules peuvent être détachés, soi-b après la procédure 6.llfijéô=\jiéJi1;aVè la pièce injectée hors du moule,ce qui permet de placer déja la douille avec le conducteur chauffant sur un deuxième ou treisième noyau,également échangeable.pendant là durée dé l'injection.
Grâce à ceci,il se fait en outre qùe là pièce in- jectée refroidit sur le noyau et qu'ainsi se solidifie le rétrécissement propre à la matière,qui prend fin lors du procédé de soudage technique qui assure la pression de soudage nécessaire outre la compensation de très considérables tolérances des noyaux.
Revendications du brevet
<Desc / Clms Page number 1>
Description Process and heating conductor for making welded joints of thermoplastic synthetic materials more especially of high and low pressure polyethylene etc ....
Methods are known according to which, between two thermoplastic objects to be joined by welding, heat is produced by means of a current through intercalated resistors, which has the effect of welding these objects.
The heating conductor and the method according to the invention are, however, characterized in that, for example, connecting pieces of pipes, e.g. made of polyethylene, can be welded simply and reliably for the most diverse pipe diameters. (e.g. between 1/2 "- 2") with the same voltage, at the same welding time, e.g. by a battery of 12 volts. The heating conductors are constructed in such a way that, thanks to their specific heat, their specific electrical resistance, their section, their length and above all their arrangement, they give each time, with a voltage of 12 volts, at the same time, for the most diverse tube or armature diameters, the heat required for the tube size, with the same solder temperature, according to the red value.
or Grader.The heat conductors are made of a material resistant to corrosion, acids and alkalis, for use in the chemical industry.
<Desc / Clms Page number 2>
Thanks to the use of low current, it is possible to draw the necessary heating current from a transportable battery or accumulator, so that welding can be carried out independently of a mains connection, e.g. on work sites or in the event of piping being placed outside. It is of course also possible to carry out welding outside the network, with a suitable transformer which has a welding time adjustment.
It is then particularly indicated that, according to the construction of the heating conductor according to the invention, the various diameters of pipes can be welded while maintaining a uniform welding time. However, a fitting can also be advantageously employed. welding machine equipped with an automatic welding time adjustment, e.g. a switch controlled by a timer etc. the welding procedure is thus protected from false operations, as the welder cannot make mistakes which could cause burns the heating conductor to cause faulty solder assembly, tube formation, and the like.
The various pipe widths which are grouped together in groups of equal strength, of course mainly depending on practical requirements, so that e.g. the pipe sizes which are required in the construction of water pipes (1/2 "to 2 ") including the connections to the houses, fall into a group and that the same welding time can always be used for the dimensions in question.
As the differences in thermal resistances cannot be compensated without more by wires and these wires have the further disadvantage of being flexible, it is further proposed, according to the invention, to use as heating conductors. , aluminum foils, the measurements of which in width and thickness are variable to a large extent.
It is especially advantageous to pre-fix the heating conductors, which consist of wires or sheets, in the form of a socket which, during the injection procedure
<Desc / Clms Page number 3>
is pulled over the core of the connecting piece of the pipe and combines, after injection, in a homogeneous way, with the reinforcement.The placement of such a socket on the end of the pipe, which is slipped by after in a pipe connection piece, is not recommended, because for ceo the tolerances should be too large.
The placement of the sleeve on the core gives rise to various difficulties. The method according to the invention is further characterized by the fact that the injection molds are constructed.
EMI3.1
truis de 'Ueilé f13.çêJfi that the 11.ey@U* àÊ grinding wheels can be detached, se-b after the procedure 6.llfijéô = \ jiéJi1; aVè the injected part out of the mold, which allows to place the sleeve with the heating conductor on a second or thirteenth core, also exchangeable during the duration of the injection.
Thanks to this, the injected part also cools down on the core and thus solidifies the shrinkage inherent in the material, which ends during the technical welding process which provides the necessary welding pressure in addition to the compensation of very considerable tolerances of the cores.
Patent claims
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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BE556713T |
Publications (1)
Publication Number | Publication Date |
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BE556713A true BE556713A (en) |
Family
ID=3872574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE556713D BE556713A (en) |
Country Status (2)
Country | Link |
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BE (1) | BE556713A (en) |
LU (1) | LU35095A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2345652A1 (en) * | 1976-03-22 | 1977-10-21 | Sturm Werner | ELECTRICALLY WELDABLE SLEEVE IN THERMOPLASTIC MATERIAL |
EP0076460A1 (en) * | 1981-10-02 | 1983-04-13 | Georg Fischer Aktiengesellschaft | Welding joint for plastics tubes |
WO1997049540A1 (en) * | 1996-06-25 | 1997-12-31 | Uponor B.V. | Electrofusion fitting |
-
0
- LU LU35095D patent/LU35095A1/xx unknown
- BE BE556713D patent/BE556713A/fr unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2345652A1 (en) * | 1976-03-22 | 1977-10-21 | Sturm Werner | ELECTRICALLY WELDABLE SLEEVE IN THERMOPLASTIC MATERIAL |
EP0076460A1 (en) * | 1981-10-02 | 1983-04-13 | Georg Fischer Aktiengesellschaft | Welding joint for plastics tubes |
WO1997049540A1 (en) * | 1996-06-25 | 1997-12-31 | Uponor B.V. | Electrofusion fitting |
Also Published As
Publication number | Publication date |
---|---|
LU35095A1 (en) |
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