DK145587B - CANE COLLECTION - Google Patents

CANE COLLECTION Download PDF

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Publication number
DK145587B
DK145587B DK230874AA DK230874A DK145587B DK 145587 B DK145587 B DK 145587B DK 230874A A DK230874A A DK 230874AA DK 230874 A DK230874 A DK 230874A DK 145587 B DK145587 B DK 145587B
Authority
DK
Denmark
Prior art keywords
receiver
bearing surface
abutment edge
sleeve
sealing
Prior art date
Application number
DK230874AA
Other languages
Danish (da)
Other versions
DK145587C (en
Inventor
P C H V D Beld
Original Assignee
Wavin Bv
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 Wavin Bv filed Critical Wavin Bv
Publication of DK145587B publication Critical patent/DK145587B/en
Application granted granted Critical
Publication of DK145587C publication Critical patent/DK145587C/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/116Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/51Joining 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
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5221Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/51Joining 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
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5229Joining tubular articles involving the use of a socket
    • B29C66/52291Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/51Joining 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
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5229Joining tubular articles involving the use of a socket
    • B29C66/52296Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/002Sleeves or nipples for pipes of the same diameter; Reduction pieces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/71General 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

Description

145587145587

Opfindelsen angår en rørsamling omfattende mindst to rørdele, af hvilken den ene er en modtagerdel af thermopla-stisk materiale, som har en konveks yderside set i længderetningen, og den anden er en indstiksdel, som er tætnet 5 mod indersiden af modtagerdelen ved hjælp af varme.BACKGROUND OF THE INVENTION The invention relates to a pipe assembly comprising at least two pipe portions, one of which is a thermoplastic material receiving portion having a longitudinal convex exterior, and the other being a plug portion sealed to the interior of the receiving portion by heat. .

Der kendes rørsamlinger,ved hvilke en indstiksdel af poly-ethen er tætnet mod indersiden af en modtagerdel. For opnåelse af en korrekt tætning skal indstiksdelen være centreret under indføringen i modtagerdelen. Der må derfor være 10 indrettet særlige midler i form af gribeorganer til at centrere indstiksdelen i forhold til modtagerdelen. Tætningsdele af forholdsvis lille længde og eventuelt voksende diameter kan imidlertid ikke anvendes som følge af, at gribe-organerne ikke kan optage de kræfter, som udøves af tætnings-15 trykket, og derfor ikke kan holde modtagerdelen centreret under indstiksdelens indføring. Sådanne tætningsdele må derfor anbringes manuelt. Der kræves imidlertid stor fagkundskab for at kunne opnå en velcentreret rørsamling. Af hensyn til sikkerheden skal rørsamlingen desuden afprøves, hvilket 20 er fordyrende.Tube joints are known in which a polyethylene insert portion is sealed to the inside of a receiver portion. To obtain a correct seal, the insert portion must be centered during insertion into the receiver portion. Therefore, special means must be provided in the form of gripping means for centering the insertion portion relative to the receiver portion. However, sealing portions of relatively small length and possibly increasing diameter cannot be used because the gripping means cannot absorb the forces exerted by the sealing pressure and therefore cannot keep the receiver portion centered during insertion of the insert. Such sealing parts must therefore be placed manually. However, great expertise is required to achieve a well-centered pipe assembly. In addition, for safety reasons the pipe assembly must be tested, which is expensive.

Fra hollandsk patentskrift no. 102.520 kendes en rørsamling omfattende en modtagerdel og en indstiksdel. Indersiden af modtagerdelen, der udgøres af en dobbeltmuffe, er varmefor-seglet til ydersiden af den respektive indstiksdel. Muffen 25 er forholdsvis lille. Hvis nogle gribeorganer skal kunne fastholde begge ender af muffen samtidigt, bliver det vanskeligt at centrere denne. Hvis muffens yderside desuden er konveks, bliver det endnu vanskeligere at opnå en tilfredsstillende fastholdelse af muffen ved hjælp af gribeorganerne, 30 eftersom det i praksis er umuligt at give muffernes ydersider nøjagtigt samme form.From Dutch patent no. 102,520 discloses a pipe assembly comprising a receiver portion and a plug portion. The inside of the receiver portion constituted by a double sleeve is the heat seal to the outside of the respective insert portion. The sleeve 25 is relatively small. If some gripping means are to be able to hold both ends of the sleeve at the same time, it becomes difficult to center it. Furthermore, if the outer surface of the sleeve is convex, it becomes even more difficult to obtain a satisfactory holding of the sleeve by the gripping means, since in practice it is impossible to give the outer sides of the sleeves exactly the same shape.

2 1455372 145537

Formålet med opfindelsen er at tilvejebringe en rørsamling af den omhandlede art, som ikke har disse ulemper, og som alligevel giver en korrekt centrering af gribeorganerne i forhold til modtagerdelen. Dette formål opnås ifølge opfin-5 délsen ved, at modtagerdelen på sin yderside har i det mindste én anlægskant og lejeflade, der fra anlægskanten forløber i modtagerdelens længderetning mod dennes nærmeste frie ende, hvilken anlægskant og lejeflade er indrettet til at kunne centrere et gribeorgan i en i forhold til modtagerdelen forud fast- 10. sat stilling, og hvilket gribeorgan er indrettet til at kunne styre indstiksdelen. Til indstilling af den nævnte rørdel kan der anvendes et gribeorgan med en klemring, som holder rørdelen, og som kan forskydes således, at rørdelen kan glide ind i muffen.The object of the invention is to provide a pipe assembly of the kind in question which does not have these disadvantages and yet provides a correct centering of the gripping means relative to the receiver part. This object is achieved according to the invention in that the receiver part on its outside has at least one abutment edge and bearing surface extending from the abutment edge in the longitudinal direction of the recipient portion towards its nearest free end, which abutment edge and bearing surface are arranged to be able to center a gripping means in the a predetermined position relative to the receiver portion, and which gripper means is adapted to control the insertion portion. For adjusting said pipe part, a gripping means with a clamping ring which holds the pipe part can be used and which can be displaced so that the pipe part can slide into the socket.

15 Fremdeles kan ifølge opfindelsen anlægskanten ligge i et plan i hovedsagen vinkelret på længdeaksen af modtagerdelen. Derved muliggøres en ualmindelig god centrering af modtagerdelen, idet koblingen derved bliver vinkeluafhasngig.Still, according to the invention, the abutment edge may lie in a plane substantially perpendicular to the longitudinal axis of the receiver portion. This allows an exceptionally good centering of the receiver part, the coupling thereby becoming angularly independent.

Endelig kan ifølge opfindelsen lejefladen have et udvendigt 20 profil, fortrinsvis svarende til tværgående eller skruelinie-formede udvækster. Derved kan lejefladen gribes meget fast, idet den i princippet skrues fast.Finally, according to the invention, the bearing surface may have an outer profile, preferably corresponding to transverse or helical projections. Thereby the bearing surface can be gripped very tightly, in principle, it is screwed in place.

Opfindelsen skal nærmere forklares i det følgende under henvisning til tegningen, hvor 25 fig. 1 viser en rørsamling ifølge opfindelsen omfattende en modtagerdel i form af en dobbeltmuffe med anlægskanter, fig. 2 en modtagerdel i form af en reduktionsmuffe, fig. 3 en modtagerdel i form af en rørbøjning, fig. 4 en modtagerdel i form af et grenrørsstykke, og 145587 3 fig. 5 et modtagerdel i form af et T-stykke.The invention will be explained in more detail below with reference to the drawing, in which 1 shows a pipe assembly according to the invention comprising a receiver part in the form of a double sleeve with abutment edges; FIG. 2 shows a receiver part in the form of a reduction sleeve; FIG. 3 shows a receiver part in the form of a pipe bend; FIG. 4 shows a receiver part in the form of a manifold; and FIG. 5 shows a receiver part in the form of a tee.

Den i fig. 1 viste rørsamling omfatter en modtagerdel 1 i form af en dobbeltmuffe og en indstiksdel 2, hvilke dele begge er af polyethylen. Ydersiden 5 af indstiksdelen 2 er 5 forbundet med indersiden 6 af modtagerdelen 1 ved hjælp af en tætningsdel 7. For at sikre at indstiksdelen 2 kun indføres i korrekt længde i modtagerdelen 1, er dobhelt-r muffen indvendigt forsynet med en centralt anbragt indad-ragende krave 8.The FIG. 1, a receiver part 1 in the form of a double sleeve and a plug part 2, both of which are made of polyethylene. The exterior 5 of the insert part 2 is connected to the inside 6 of the receiver part 1 by means of a sealing part 7. To ensure that the insert part 2 is inserted only in the correct length in the receiver part 1, the double-half sleeve is internally provided with a centrally placed inwardly projecting collar 8.

10 For at opnå en centreret indføring af indstiksdelen 2 i modtagerdelen 1, må tætningsdelene på ydersiden af indstiksdelen 2 monteres, i en afstand af ca 2 cm fra dennes åbning.10 In order to obtain a centered insertion of the insert part 2 into the receiver part 1, the sealing parts on the outside of the insert part 2 must be mounted, at a distance of about 2 cm from the opening thereof.

For at muliggøre sidstnævnte er modtagerdelen 1 på ydersi-15 den forsynet med mindst én centrerende anlægskant 9. Anlægskanten 9 ligger i et plan, der i hovedsagen står vinkelret på indstiksdelens længdeakse, idet der derved opnås en endnu bedre centrering.To enable the latter, the receiver portion 1 on the outside is provided with at least one centering abutment edge 9. The abutment edge 9 lies in a plane which is generally perpendicular to the longitudinal axis of the insertion portion, thereby obtaining an even better centering.

For at opnå en passende placering af tætningsdelene på yder-20 siden af for eksempel modtagerdelen 1, hvis ydre overflade vokser i diameter hen mod rørdelens midtpunkt, er der tilvejebragt mindst én , eventuelt cylindrisk lejeflade 10, som strækker sig i rørets længderetning og grænser op til anlægskanten 9. Der kan også anvendes en konisk lejeflade 10', 25 se fig. 5. Denne flade har da sin største diameter ved mundingen 4.In order to obtain a suitable placement of the sealing members on the outer side of, for example, the receiver part 1, whose outer surface grows in diameter towards the center of the pipe part, at least one, possibly cylindrical bearing surface 10, which extends longitudinally and adjacent to the pipe is provided. to the abutment edge 9. A tapered bearing surface 10 ', 25 can also be used. 5. This surface then has its largest diameter at the mouth 4.

Lejefladerne 10, 10' er eventuelt forsynede med skruelinie-formede gevinddele 11 eller tværgående dele 12. Gevinddelene 11 gør det muligt at skrue tætningsdelen på lejefladen ind 145587 4 til tætningsdelen 7 ligger an mod anlægskanten 9. Hvis der anvendes en keglestubformet lejeflade,er det selvsagt umuligt at skrue tætningsdelen fast. Den må i dette tilfælde klemmes på den keglestubformede lejeflade 10’. Der er for-5 trinsvis tilvejebragt tværgående fremspring på denne leje flade for på passende måde at holde tætningsdelen på plads.The bearing faces 10, 10 'are optionally provided with helical threaded parts 11 or transverse parts 12. The threaded parts 11 allow the sealing part of the bearing surface to be screwed in to the sealing part 7 abutting the abutment edge 9. If a cone-shaped bearing surface is used, it is Of course, it is impossible to screw the sealing member into place. In this case it must be clamped on the cone-shaped bearing surface 10 '. Preferably, transverse projections are provided on this bearing surface to suitably hold the sealing member in place.

Hvis lejefladen 10'er kegle stubformet og har sin største diameter ved mundingen 4, vil de spændinger, som frembringes af tætningstrykket optages på modtagerdelen 1.If the bearing surface 10s cone stub-shaped and has its largest diameter at the mouth 4, the stresses produced by the sealing pressure will be absorbed on the receiver part 1.

10- Som vist i fig. 1 strækker lejefladen sig imellem anlægskanten 9 og den nærmeste frie ende af modtagerdelen 1.10- As shown in FIG. 1, the bearing surface extends between the abutment edge 9 and the near free end of the receiver part 1.

Dette er imidlertid ikke absolut nødvendigt. Det er nemlig også muligt at anbringe anlægskanten 9 i en større afstand, eksempelvis 4 cm fra mundingen 4, lige- som det er muligt 15 at lade lejefladerne 10, 10' ende i en afstand på for eksempel 2 cm fra mundingen 4.However, this is not absolutely necessary. It is also possible to place the abutment edge 9 at a greater distance, for example 4 cm from the orifice 4, as is possible 15 to allow the bearing surfaces 10, 10 'to end at a distance of, for example, 2 cm from the orifice 4.

Fig 2 viser en modtagerdel i form af en reduktionsmuffe 12.Fig. 2 shows a receiver part in the form of a reduction sleeve 12.

Denne reduktionsmuffe 12 er forsynet med en anlægskant 9 og en cylindrisk lejeflade 10, som strækker sig til i nær-20 heden af mundingen 4.This reduction sleeve 12 is provided with a abutment edge 9 and a cylindrical bearing surface 10 which extends in the vicinity of the mouth 4.

I fig. 3 udgøres modtagerdelen af en rørbøjning, idet anlægskanten 9 ligger i afstand fra mundingen,og den frie ende af den cylindriske lejeflade 10 strækker sig helt ud til mundingen.In FIG. 3, the receiver portion is constituted by a tube bend, the abutment edge 9 being spaced from the orifice and the free end of the cylindrical bearing surface 10 extending all the way to the orifice.

25 Den i fig. 4 viste modtagerdel i form af et grenrørsstykke, som også kan have form som en saddeldel, er forsynet med en anlægskant i nærheden af mundingen. Imellem mundingen og anlægskanten 9 strækker der sig en keglestubflade.The embodiment of FIG. 4, in the form of a manifold piece, which can also take the form of a saddle part, is provided with a abutment edge near the mouth. Between the mouth and abutment edge 9, a cone stub surface extends.

Den i fig. 5 viste modtagerdel i form af et Γ-stykke er påThe FIG. 5 is in the form of a stykke-piece is on

DK230874A 1973-04-27 1974-04-26 CANE COLLECTION DK145587C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7305985.A NL157539B (en) 1973-04-27 1973-04-27 TUBE COUPLER.
NL7305985 1973-04-27

Publications (2)

Publication Number Publication Date
DK145587B true DK145587B (en) 1982-12-13
DK145587C DK145587C (en) 1983-05-16

Family

ID=19818750

Family Applications (1)

Application Number Title Priority Date Filing Date
DK230874A DK145587C (en) 1973-04-27 1974-04-26 CANE COLLECTION

Country Status (18)

Country Link
JP (1) JPS5042419A (en)
AT (1) AT339101B (en)
BE (1) BE814242A (en)
BR (1) BR7403425D0 (en)
DD (1) DD111723A5 (en)
DE (1) DE2419893A1 (en)
DK (1) DK145587C (en)
ES (1) ES425964A1 (en)
FI (1) FI60432C (en)
FR (1) FR2227484B1 (en)
GB (1) GB1473232A (en)
HU (1) HU173139B (en)
IE (1) IE39699B1 (en)
IT (1) IT1010002B (en)
NL (1) NL157539B (en)
RO (1) RO64277A (en)
SE (1) SE407272B (en)
ZA (1) ZA742422B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715184A1 (en) * 1987-05-07 1988-12-01 Friedrichsfeld Gmbh CONNECTING ARRANGEMENT
FI105358B (en) * 1997-04-14 2000-07-31 Uponor Innovation Ab Pipe connection for connecting pipes at angular or branch connection
KR20020028354A (en) * 2000-10-09 2002-04-17 조복현 method of connect underground pipes with sleeve type sealing pad
DE102007014049B3 (en) 2007-03-21 2008-12-04 Friatec Ag Compensation element for connecting components
US20180345599A1 (en) * 2017-06-02 2018-12-06 Divergent Technologies, Inc. Node with co-printed locating features and methods for producing same
CN112497769B (en) * 2020-10-26 2023-04-07 福建省宏拓机械制造有限公司 Lantern ring equipment for end part of pipeline

Also Published As

Publication number Publication date
FR2227484B1 (en) 1976-12-17
FI60432B (en) 1981-09-30
AU6801874A (en) 1975-10-23
FR2227484A1 (en) 1974-11-22
HU173139B (en) 1979-02-28
SE407272B (en) 1979-03-19
IE39699B1 (en) 1978-12-06
IT1010002B (en) 1977-01-10
BR7403425D0 (en) 1974-12-03
RO64277A (en) 1979-05-15
ZA742422B (en) 1975-10-29
FI60432C (en) 1982-01-11
IE39699L (en) 1974-10-27
GB1473232A (en) 1977-05-11
DD111723A5 (en) 1975-03-05
DK145587C (en) 1983-05-16
NL7305985A (en) 1974-10-29
NL157539B (en) 1978-08-15
ES425964A1 (en) 1976-06-16
JPS5042419A (en) 1975-04-17
DE2419893A1 (en) 1974-11-07
BE814242A (en) 1974-10-28
AT339101B (en) 1977-10-10
ATA345474A (en) 1977-01-15

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