FI65482C - Elektriskt upphettad svetsningsbar muff och foerfarande foer dess framstaellning - Google Patents

Elektriskt upphettad svetsningsbar muff och foerfarande foer dess framstaellning Download PDF

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Publication number
FI65482C
FI65482C FI763608A FI763608A FI65482C FI 65482 C FI65482 C FI 65482C FI 763608 A FI763608 A FI 763608A FI 763608 A FI763608 A FI 763608A FI 65482 C FI65482 C FI 65482C
Authority
FI
Finland
Prior art keywords
sleeve
muff
pipes
upphettad
svetsningsbar
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Application number
FI763608A
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English (en)
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FI763608A (fi
FI65482B (fi
Inventor
Paul Staehli
Original Assignee
Geberit Ag
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Application filed by Geberit Ag filed Critical Geberit Ag
Publication of FI763608A publication Critical patent/FI763608A/fi
Application granted granted Critical
Publication of FI65482B publication Critical patent/FI65482B/fi
Publication of FI65482C publication Critical patent/FI65482C/fi

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Classifications

    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91218—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods using colour change, e.g. using separate colour indicators
    • 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"
    • B29C65/3472—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
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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"
    • B29C65/3468—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 means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • 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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Description

R3C71 KUULUTUSJULKAISU
«K W C^uTLAeONINesSKlUiT 65482 C (4¾ Patentti myönnetty 10 C5 1934 Patent osddclat ’ (SI) Kv.ik? /VK.CL3 P 16 L 47/02 SUOMI—FINLAND (21) h*^lhdc««u«--P«««öMÖla»te* 763608 (22) Hakamhpllvl—Anaeknlnffdag 15-12.76 (23) Alkupäivä—GUtighvttdag i5.i2.76 (41) Tullut lulklMlul — Uhrit offuMHg 19-06.77
PatanttL it rukittarihallituf .,........... . . ....,_ _ ' (44) Nihtivtluipanou )* kwiLJulkaimn pvm. — Qli
Patent· och ragittarstyratMtl ' ’ Anelun utfegd odt utUkrtfUn pubUcarvd 31.01.84 (32)(33)(31) Pyydetty utuuHwu» ·8«ιΜ prMtit l8.12.75 Sveitsi-Schweiz(CH) 16U16/75 (71) Geberit AG., Blumenaustrasse 77, 8645 Jona, Sveitsi-Schweiz(CH) (72) Paul Stähli, Jona, Sveitsi-Schweiz(CH) (74) Leitzinger Qy (54) Sähköisesti kuumennettava hitsattava muhvi ja menetelmä sen valmistamiseksi - Elektriskt upphettad svetsningsbar muff och förfarande för dess framställning
Keksinnön kohteena on sähköisesti kuumennettava, kestomuovia oleva hitsattava muhvi muoviputkien yhdistämiseksi siihen sovitetun kuumennuslankakäämin avulla, jonka päät on johdettu ulos virtalähteeseen liittämistä varten, jolloin muhvissa on joustavat kaistaleet muhvin sisään työnnettyjen putkien kiinnittämiseksi ennen hitsaamista.
Muoviputkien ja niihin yhdistettävien tiettyjen muhvien väliin muodostuu verraten suuria, valmistuksesta johtuvia toleranssi-eroja. Jos toleranssit pidetään liian ahtaina, voi tapahtua, että eri putket ovat sovitettavissa ainoastaan vaikeasti, esimerkiksi lyömällä muhviin, mikä on vahingollista. Laajoilla toleransseilla putket eivät keskity muhviin ja voivat helposti kallistua, mikä johtaa huonoihin hitsiliitoksiin. Myöskin putkijärjestelmää asennettaessa olisi edullista, jos putket sovitettaisiin ennen hitsausta tiiviisti muhveihin ja olisivat viimeksi mainittujen pidättämihä tarkalleen sama-akselisia.
2 65482 Tämän keksinnön tehtävänä on nyt aikaansaada alussa mainittua laatua oleva hitsattava muhvi, jolla vältetään tunnettujen muhvien epäkohdat ja joka täyttää asetetut vaatimukset.
Keksinnön mukaan tämä saavutetaan siten, että joustavat kaistaleet on muodostettu muhviseinämään tehtyjen pitkittäisuurteiden avulla ja ne muodostavat yhtenäisen yksikön muhvikappaleen kanssa.
Keksintö kohdistuu myöskin menetelmään hitsattavan muhvin valmistamiseksi, joka menetelmä on tunnettu siitä, että pitkit-täisuurteet viilletään muhvin sisäseinämään siten, että niistä syrjäytetty aine muodostaa sisäänpäin ulkonevat kaistaleet.
Seuraajassa selitetään lähemmin hitsatun muhvin erästä sovellutusesimerkkiä viitaten piirustukseen, jossa:
Kuvio 1 esittää hitsatun muhvin pituusleikkausta.
Kuvio 2 esittää suuremmassa koossa hitsatun muhvin seinämän säteettäistä leikkausta.
Kuviossa 1 esitetyssä, sähköisesti kuumennettavassa hitsatussa muhvissa on kestomuovia, esimerkiksi polyeteeniä, oleva lieriömäinen runko 1. Rungon sisäseinämä on varustettu ruuviviivan muotoisella urituksella 3, johon on sovitettu kuumennuslangan käämi 4. Kuumennuslangan päät on johdettu kahden säteettäisen porauksen 5 kautta ulospäin ja yhdistetty kahden runkoon kiinnitetyn kosketinkappaleen 6 kanssa, jotka puolestaan on suojattu kahdella hoikilla 7.
Muhvin valmistus tapahtuu verraten ahtailla toleransseilla.
Sitä vastoin useimmiten suulakepuristamalla valmistetuissa muoviputkissa esiintyy verraten suuria läpimittaeroja, mikä vaikeuttaa muhvin työntämistä putkien päiden päälle siinä tapauksessa, että sovite on liian tiukka tai liitos liian väljä ennen hitsausta. Tämän johdosta eri putkien asennus putkijärjestelmään vaikeutuu. Putket eivät ole keskitetyt 65482 muhveihin ja hitsaus on epätasainen. Tämän estämiseksi muhvin rungon 1 sisäseinämään 2 pistetään pitkittäisuurteita 8 siten, että uurteista syrjäytetty aine ulkonee sisäänpäin ja muodostaa pitkittäiskaistaleita 9. Luonnollisesti uurteen 8 syvyys valitaan siten, että uriin 3 sovitettu vastuslanka 4 ei vahingoitu.
Uurteet vedetään tarkoituksenmukaisesti siten, että kaistaleet 9 sijaitsevat tasaisin välein sisäseinämässä.
Näiden kaistaleiden ansiosta muhviin molemmilta puolilta vasteren-kaaseen 10 saakka työnnetyt putket 11 tulevat pidätetyiksi tiukalla sovituksella ja tarkalleen keskitetyiksi. Putkien välimatka muhvin sisäseinämästä on tasainen, mikä takaa hyvän hitsiliitoksen. Kokeet ovat osoittaneet, että kaistaleet ovat riittävän elastisia aikaansaamaan myöskin muhvin moninkertaisen päälle työntämisen jälkeen liitoksen lujan pitävyyden.
Kiinteän liitoksen valmistamiseksi muhvia kuumennetaan tunnettuun tapaan kuumennuslangan välityksellä, mikä aikaansaa muhvin kutistumisen ja sisäseinämän yhteenhitsautumisen putkien päiden kanssa.
Oikein tapahtuneen hitsauksen tarkastamiseksi on osoittautunut tarkoituksenmukaiseksi lämpöindikaattorin sovittaminen muhvin päälle. Tämä sinänsä tunnettu indikaattori, joka on esimerkiksi paperia tai muovia, liimataan tarkoituksenmukaisesti hyvin näkyvästi putkien viereen muhvin päälle. Indikaattorin värin muuttumisen mukaan muhvin hitsauksen jälkeen voidaan todeta, onko saavutettu oikea hitsauslämpötila.
Koska putkijärjestelmiä asennettaessa eri putkikappaleet ja muhvit liitetään useimmiten ensin irrallisesti yhteen ja sen jälkeen hitsataan ryhmittäin yhteen, voidaan indikaattorin mukaan heti todeta, mitkä liitokset on jo hitsattu ja mitä on vielä hitsattava. Tällä tavalla voidaan välttää haitalliset kaksoishitsaukset ja myöskin heti on selvää, onko jokin hitsaus-kohta unohdettu vai ei. Väri-indikaattorissa voi olla esimerkiksi valkoinen täplä, joka lämpötilan kohotessa tulee tummemmaksi ja mustaksi saavutettaessa loppulämpötila noin 240 - 250°C.

Claims (2)

4 65482
1. Sähköisesti kuumennettava, kestomuovia oleva hitsattava muhvi (1) muoviputkien (11) yhdistämiseksi siihen sovitetun kuumennuslankakäämin (A) avulla, jonka päät on johdettu ulos virtalähteeseen liittämistä varten, jolloin muhvissa on joustavat kaistaleet (9) muhvin sisään työnnettyjen putkien (11) kiinnittämiseksi ennen hitsaamista, tunnettu siitä, että joustavat kaistaleet (9) on muodostettu muhviseinämään (2) tehtyjen pitkittäisuurteiden (Θ) avulla ja ne muodostavat yhtenäisen kappaleen muhvikappaleen kanssa.
2. Menetelmä patenttivaatimuksen 1 mukaisen hitsattavan muhvin valmistamiseksi, tunnettu siitä, että pitkittäisuurteet (8) viilletään muhvin sisäseinämään (2) siten, että niistä syrjäytetty aine muodostaa sisäänpäin ulkonevat kaistaleet (9) .
FI763608A 1975-12-18 1976-12-15 Elektriskt upphettad svetsningsbar muff och foerfarande foer dess framstaellning FI65482C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1641675 1975-12-18
CH1641675A CH606895A5 (fi) 1975-12-18 1975-12-18

Publications (3)

Publication Number Publication Date
FI763608A FI763608A (fi) 1977-06-19
FI65482B FI65482B (fi) 1984-01-31
FI65482C true FI65482C (fi) 1984-05-10

Family

ID=4417181

Family Applications (1)

Application Number Title Priority Date Filing Date
FI763608A FI65482C (fi) 1975-12-18 1976-12-15 Elektriskt upphettad svetsningsbar muff och foerfarande foer dess framstaellning

Country Status (14)

Country Link
US (1) US4147926A (fi)
AT (1) AT350342B (fi)
BE (1) BE849569A (fi)
CA (1) CA1039770A (fi)
CH (1) CH606895A5 (fi)
DE (2) DE7639283U1 (fi)
DK (1) DK571176A (fi)
FI (1) FI65482C (fi)
FR (1) FR2335325A1 (fi)
IT (1) IT1065429B (fi)
LU (1) LU76413A1 (fi)
NL (1) NL7614100A (fi)
NO (1) NO145048C (fi)
SE (1) SE7614212L (fi)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
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CH622870A5 (fi) * 1977-06-03 1981-04-30 Werner Sturm
US4313053A (en) * 1980-01-02 1982-01-26 Von Roll A.G. Welding sleeve of thermoplastic material
EP0035750B1 (de) * 1980-03-10 1984-02-08 Georg Fischer Aktiengesellschaft Schweissverbindung für Kunststoffrohre
EP0058175B2 (en) * 1980-08-22 1992-05-06 Industrial Pipe Systems Pty. Limited Electric fusion pipe fittings
CH648393A5 (de) * 1980-08-29 1985-03-15 Werner Sturm Elektro-schweissmuffe aus einem thermoplast zum verbinden von leitungselementen aus thermoplast.
DE3204681C2 (de) * 1982-02-11 1986-02-06 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Verfahren und Vorrichtung zum Einbetten eines elektrischen Heizdrahtes in einem muffenartigen Kunststoffteil
ATE27053T1 (de) * 1982-05-12 1987-05-15 Geberit Ag Schweissmuffe.
US4626308A (en) * 1983-02-18 1986-12-02 The Victaulic Company Plc Method of making welded pipe joints
US4622087A (en) * 1983-02-18 1986-11-11 The Victaulic Company Plc Method of making weldable pipe fittings
GB8410765D0 (en) * 1984-04-27 1984-06-06 Glynwed Tubes & Fittings Fusion pad
US4631107A (en) * 1985-05-16 1986-12-23 Central Plastics Company Thermoplastic fitting electric heat welding apparatus
US4602148A (en) * 1985-05-16 1986-07-22 Central Plastics Company Thermoplastic fitting electric heat welding method and apparatus
US4642155A (en) * 1985-05-16 1987-02-10 Central Plastics Company Thermoplastic fitting electric heat welding method and apparatus
CH668739A5 (de) * 1986-01-08 1989-01-31 Geberit Ag Einrichtung mit einer kunststoff-schweissmuffe und einem anschlusskopf.
US4684789A (en) * 1986-04-17 1987-08-04 Central Plastics Company Thermoplastic fitting electric welding method and apparatus
US4906313A (en) * 1988-05-09 1990-03-06 R. W. Lyall & Company, Inc. Fusion weld method and assembly for forming a fusion welded joint between pipe sections
CA1321626C (en) * 1988-07-21 1993-08-24 Naotake Uda Electrofusion of electrofusion joint, method of confirming state of fusion and fusion joint suitable for use in the methods
US4894521A (en) * 1988-11-21 1990-01-16 Central Plastics Company Electric heating element for fusing thermoplastic materials
US4978837A (en) * 1990-04-13 1990-12-18 Central Plastics Company Method and apparatus for electrically heat welding thermoplastic fittings
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Also Published As

Publication number Publication date
FR2335325B3 (fi) 1979-08-24
US4147926A (en) 1979-04-03
FI763608A (fi) 1977-06-19
FI65482B (fi) 1984-01-31
NO145048C (no) 1982-01-04
NL7614100A (nl) 1977-06-21
DE2656850C2 (de) 1985-04-18
CH606895A5 (fi) 1978-11-15
SE7614212L (sv) 1977-06-19
ATA940776A (de) 1978-10-15
NO764227L (fi) 1977-06-21
DK571176A (da) 1977-06-19
CA1039770A (en) 1978-10-03
DE7639283U1 (de) 1977-04-07
LU76413A1 (fi) 1977-06-10
AT350342B (de) 1979-05-25
FR2335325A1 (fr) 1977-07-15
BE849569A (fr) 1977-04-15
NO145048B (no) 1981-09-21
DE2656850A1 (de) 1977-06-30
IT1065429B (it) 1985-02-25

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