FR2282084A1 - CONNECTION DEVICE BETWEEN A POLYETHYLENE GAS PIPE AND A METAL GAS PIPE - Google Patents

CONNECTION DEVICE BETWEEN A POLYETHYLENE GAS PIPE AND A METAL GAS PIPE

Info

Publication number
FR2282084A1
FR2282084A1 FR7524641A FR7524641A FR2282084A1 FR 2282084 A1 FR2282084 A1 FR 2282084A1 FR 7524641 A FR7524641 A FR 7524641A FR 7524641 A FR7524641 A FR 7524641A FR 2282084 A1 FR2282084 A1 FR 2282084A1
Authority
FR
France
Prior art keywords
sleeve
tube
gas pipe
polyethylene
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7524641A
Other languages
French (fr)
Other versions
FR2282084B1 (en
Inventor
Herbert Wimmershoff
Karl-Friedrich Osten
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.)
MAIN GASWERKE AG
Original Assignee
MAIN GASWERKE AG
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
Priority claimed from DE19742439845 external-priority patent/DE2439845C3/en
Application filed by MAIN GASWERKE AG filed Critical MAIN GASWERKE AG
Publication of FR2282084A1 publication Critical patent/FR2282084A1/en
Application granted granted Critical
Publication of FR2282084B1 publication Critical patent/FR2282084B1/fr
Granted legal-status Critical Current

Links

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
    • 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
    • B29C66/74Joining plastics material to non-plastics material
    • B29C66/742Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B29C65/34Joining 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"
    • B29C65/3404Joining 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
    • B29C65/342Joining 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
    • 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
    • B29C65/34Joining 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"
    • B29C65/3472Joining 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
    • B29C65/3476Joining 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
    • 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
    • B29C66/114Single butt joints
    • B29C66/1142Single butt to butt 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
    • B29C66/12Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122Joint 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
    • B29C66/1222Joint 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
    • 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
    • B29C66/12Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122Joint 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
    • B29C66/1224Joint 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
    • 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
    • B29C66/5224Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped 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
    • B29C66/50General 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
    • 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
    • B29C66/52297Joining tubular articles involving the use of a socket said socket comprising slip-off prevention means
    • 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
    • B29C66/52298Joining tubular articles involving the use of a socket said socket being composed by several elements
    • 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
    • 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
    • F16L47/00Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/20Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/24Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics for joints between metal and plastics pipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2305/00Use of metals, their alloys or their compounds, as reinforcement

Abstract

1514208 Pipe connections MAIN GASWERKE AG and MANNESMANN AG 4 Aug 1975 [16 Aug 1974] 32558/75 Heading F2G A polyethylene gas pipe 1 enters a house via a wall 2 and is joined to a metal pipe 8 by a connector comprising a polyethylene sleeve 6 and a metal tube 9, the polyethylene pipe 1 being welded by embedded wires 7 into one end of the sleeve 6 and the metal tube 9 secured within the other, an abutment 11 at the end of the metal tube 9 fitting within a recess 14 in the sleeve 6. The abutment 11 is an internally screwthreaded ring or steel nut 12 moulded within the sleeve 6 and screwed and adhered to the end of the tube 9 which itself is a force fit in the sleeve 6; alternatively the abutment may be a collar formed on the end of the tube 9, the tube being moulded within the sleeve 6 with sealing rings trapped between. The sleeve 6 may be formed in two parts one of which may be moulded with the tube 9 or formed separately, the two parts being welded together, e.g. by means of further embedded wires. A protective tube 3 with gastight end caps 4 surrounds the connector where it passes through the wall 2.
FR7524641A 1974-08-16 1975-08-07 CONNECTION DEVICE BETWEEN A POLYETHYLENE GAS PIPE AND A METAL GAS PIPE Granted FR2282084A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742439845 DE2439845C3 (en) 1974-08-16 Connection piece for connecting a metal-plastic gas pipe system

Publications (2)

Publication Number Publication Date
FR2282084A1 true FR2282084A1 (en) 1976-03-12
FR2282084B1 FR2282084B1 (en) 1982-04-16

Family

ID=5923627

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7524641A Granted FR2282084A1 (en) 1974-08-16 1975-08-07 CONNECTION DEVICE BETWEEN A POLYETHYLENE GAS PIPE AND A METAL GAS PIPE

Country Status (8)

Country Link
AT (1) AT339102B (en)
BE (1) BE832387A (en)
CH (1) CH586867A5 (en)
FR (1) FR2282084A1 (en)
GB (1) GB1514208A (en)
IT (1) IT1040355B (en)
LU (1) LU73208A1 (en)
NL (1) NL7509760A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538075A1 (en) * 1982-12-17 1984-06-22 Daimler Benz Ag GAS AND LIQUID-SEALED CONNECTION BETWEEN A PIECE OF PLASTIC MATERIAL AND A METALLIC PART COATED THEREIN BY PRESSURIZED CASTING OF A MASS OF PLASTICIZED PLASTIC MATERIAL, AND METHOD OF COATING WITH GAS AND LIQUID SEALING OF A PIECE METALLIC IN A PIECE OF PLASTIC MATERIAL
EP0493316A1 (en) * 1990-12-20 1992-07-01 Geberit AG Device for connecting a weldable plastic or composite tube to a further conduit
WO1995015253A1 (en) * 1993-11-30 1995-06-08 Uponor Limited Joining of hollow elongate members

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE3666T1 (en) * 1980-05-23 1983-06-15 Georg Fischer Aktiengesellschaft HOUSE ENTRY, FOR MEDIUM TRANSPORT LINES, ESPECIALLY FOR GAS AND WATER LINES.
DE3023921A1 (en) * 1980-06-26 1982-01-14 Jeschke, Immanuel, 3203 Sarstedt GAS HOUSE CONNECTION DEVICE
DE3029533A1 (en) * 1980-08-04 1982-03-11 Immanuel 3203 Sarstedt Jeschke Gas supply union to house - has additional sealing ring between bush and iron pipe with stop
DE3539487A1 (en) * 1985-11-07 1987-05-14 Diga Die Gasheizung Gmbh House lead-in
DE69220745T2 (en) * 1991-04-19 1997-11-06 Sekisui Chemical Co Ltd COUPLING FOR PIPELINES
GB2298014B (en) * 1995-01-11 1998-09-09 Wask Rmf Ltd A coupling
ES2170596B1 (en) * 1998-11-27 2003-05-16 Singla Manuel Gomez FLEXIBLE CONNECTION ELEMENTS FOR SANITARY USE IN PLASTIC MATERIAL AND ITS CONFORMATION PROCEDURE.
DE19957567B4 (en) * 1999-11-30 2004-04-08 Rasmussen Gmbh Diffusion-tight fluid line
GB0400665D0 (en) * 2004-01-13 2004-02-11 Petro Technik Ltd Improved plastic to metal fitting
AT500962B8 (en) * 2005-05-12 2007-02-15 E Hawle Armaturenwerke Gmbh PIPE FITTING
DE102007057386A1 (en) * 2007-11-27 2009-05-28 Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co.KG Assembly and electrochemical sensor with such an assembly, in particular conductivity sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066823B (en) *
US3823965A (en) * 1973-02-26 1974-07-16 J Emberson Pipe joint

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066823B (en) *
US3823965A (en) * 1973-02-26 1974-07-16 J Emberson Pipe joint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538075A1 (en) * 1982-12-17 1984-06-22 Daimler Benz Ag GAS AND LIQUID-SEALED CONNECTION BETWEEN A PIECE OF PLASTIC MATERIAL AND A METALLIC PART COATED THEREIN BY PRESSURIZED CASTING OF A MASS OF PLASTICIZED PLASTIC MATERIAL, AND METHOD OF COATING WITH GAS AND LIQUID SEALING OF A PIECE METALLIC IN A PIECE OF PLASTIC MATERIAL
EP0493316A1 (en) * 1990-12-20 1992-07-01 Geberit AG Device for connecting a weldable plastic or composite tube to a further conduit
WO1995015253A1 (en) * 1993-11-30 1995-06-08 Uponor Limited Joining of hollow elongate members

Also Published As

Publication number Publication date
DE2439845A1 (en) 1976-02-19
ATA551675A (en) 1977-01-15
IT1040355B (en) 1979-12-20
FR2282084B1 (en) 1982-04-16
LU73208A1 (en) 1976-03-02
DE2439845B2 (en) 1976-07-22
BE832387A (en) 1975-12-01
CH586867A5 (en) 1977-04-15
AT339102B (en) 1977-10-10
NL7509760A (en) 1976-02-18
GB1514208A (en) 1978-06-14

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