IT1032107B - Dispositivo per la produzione di tubi alettati di plastica o di altro materiale adatto all estrusione - Google Patents

Dispositivo per la produzione di tubi alettati di plastica o di altro materiale adatto all estrusione

Info

Publication number
IT1032107B
IT1032107B IT53663/74A IT5366374A IT1032107B IT 1032107 B IT1032107 B IT 1032107B IT 53663/74 A IT53663/74 A IT 53663/74A IT 5366374 A IT5366374 A IT 5366374A IT 1032107 B IT1032107 B IT 1032107B
Authority
IT
Italy
Prior art keywords
extrusion
plastic
production
material suitable
finned tubes
Prior art date
Application number
IT53663/74A
Other languages
English (en)
Original Assignee
Nordstroem Erik G W
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 Nordstroem Erik G W filed Critical Nordstroem Erik G W
Application granted granted Critical
Publication of IT1032107B publication Critical patent/IT1032107B/it

Links

Classifications

    • 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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0014—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping tubes or blown tubular films
    • 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
    • B29D23/18—Pleated or corrugated hoses
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C2035/0211—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould resistance heating
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B29C2035/1616—Cooling using liquids
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/76—Cores
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
    • B29C49/42808—Filling the article
    • B29C49/42811—Introducing an auxiliary material not being the content, e.g. foamable material in a hollow wall section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2016/00—Articles with corrugations or pleats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/003—Tubular articles having irregular or rough surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses
    • B29L2023/186—Pleated or corrugated hoses having a smooth internal wall

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Sewage (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
IT53663/74A 1973-10-22 1974-10-22 Dispositivo per la produzione di tubi alettati di plastica o di altro materiale adatto all estrusione IT1032107B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7314295A SE381001B (sv) 1973-10-22 1973-10-22 Forfarande och anordning for framstellning av kamflensror av plast

Publications (1)

Publication Number Publication Date
IT1032107B true IT1032107B (it) 1979-05-30

Family

ID=20318881

Family Applications (1)

Application Number Title Priority Date Filing Date
IT53663/74A IT1032107B (it) 1973-10-22 1974-10-22 Dispositivo per la produzione di tubi alettati di plastica o di altro materiale adatto all estrusione

Country Status (21)

Country Link
US (1) US3998579A (it)
JP (1) JPS5078676A (it)
AT (1) AT361703B (it)
BE (1) BE821318A (it)
CA (1) CA1053427A (it)
CH (1) CH591323A5 (it)
CS (1) CS202541B2 (it)
DD (1) DD117838A5 (it)
DE (1) DE2450171C2 (it)
DK (1) DK143492C (it)
ES (1) ES431416A1 (it)
FI (1) FI60825C (it)
FR (1) FR2248140B1 (it)
GB (1) GB1483113A (it)
IE (1) IE40322B1 (it)
IL (1) IL45862A (it)
IT (1) IT1032107B (it)
NL (1) NL181638C (it)
NO (1) NO141079C (it)
SE (1) SE381001B (it)
SU (1) SU644363A3 (it)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2362444C2 (de) * 1973-12-15 1983-06-01 Reifenhäuser KG, 5210 Troisdorf Vorrichtung zum Herstellen eines Rohres aus thermoplastischem Kunststoff mit Außenrippen und glattem Innenkanal
FR2424123A1 (fr) * 1978-04-24 1979-11-23 Armosig Procede et appareillage pour la fabrication en continu de profiles tubulaires ailetes en matiere synthetique
CA1198864A (en) * 1983-02-21 1986-01-07 Manfred A.A. Lupke Producing thermoplastic articles, particularly with porous walls
SE449456B (sv) * 1983-11-15 1987-05-04 Uponor Ab Forfarande och anordning for framstellning av ror varvid formbacksdelarna er delade i formstreckans lengsriktning
SE8501212D0 (sv) * 1985-03-12 1985-03-12 Uponor Ab Sett vid tillverkning av vermeisolerat ror
FI74654C (fi) * 1986-01-13 1988-03-10 Uponor Nv Anordning och foerfarande foer framstaellning av kamflaensroer.
FI77405C (fi) * 1986-03-20 1989-03-10 Uponor Nv Foerfarande och anordning foer framstaellning av kamflaensroer.
US4712993A (en) * 1986-03-25 1987-12-15 Lupke Manfred Arno Alfred Extrusion die for externally ribbed plastic tubing
DE3725286A1 (de) * 1987-07-30 1989-02-09 Wilhelm Hegler Verfahren und vorrichtung zum herstellen eines rippen-rohres aus kunststoff
DE3728303A1 (de) * 1987-08-25 1989-03-16 Sueddeutsche Kuehler Behr Waermetauscher mit einer rippen-rohranordnung
DE3737588C3 (de) * 1987-11-05 1993-12-23 Corma Inc Verfahren zum Herstellen eines innen glatten, außen gerippten Rohres aus extrudierbarem Kunststoff sowie Vorrichtung zur Durchführung des Verfahrens
US4789322A (en) * 1987-11-23 1988-12-06 Harry Chan Corrugator with intermeshing overlapping moldblock halves
DE3744510A1 (de) * 1987-12-30 1989-07-13 Wilhelm Hegler Rohrverbindungs-element
DE3810915C1 (en) * 1988-03-30 1989-04-27 Unicor Gmbh Rahn Plastmaschinen, 8728 Hassfurt, De Apparatus for continuously shaping the wall of a pipeline of thermoplastic material
NL8802305A (nl) * 1988-09-16 1990-04-17 Wavin Bv Geextrudeerde radiaal verstrekte kunststofbuis en werkwijze voor het vervaardigen van een dergelijke buis.
FI83984C (fi) * 1989-04-28 1991-09-25 Uponor Nv Tryckledning.
FI85239C (fi) * 1989-07-12 1992-03-25 Uponor Nv Anordning foer framstaellning av kamflaensroer.
FI87321C (fi) * 1989-10-27 1992-12-28 Uponor Nv Foerfarande och anordning foer tillverkning av kamflaensroer
DE4111229A1 (de) * 1991-04-08 1992-10-15 Wilhelm Hegler Vorrichtung zur herstellung von kunststoff-rohren
CA2089183C (en) * 1991-06-14 2000-12-05 Manfred A. A. Lupke Travelling mold tunnel apparatus for smooth walled pipe
DE4129855C2 (de) * 1991-09-07 1999-09-16 Wilhelm Hegler Verfahren zum Verschweißen von aus thermoplastischem Kunststoff bestehenden Rohren
FI96396C (fi) * 1992-12-28 1996-06-25 Uponor Bv Menetelmä kaksikerroksisen muoviputken muodostamiseksi aineensiirtoa varten ja menetelmällä muodostettu kaksikerroksinen muoviputki
DE19942162A1 (de) * 1999-09-04 2001-03-08 Ralph Peter Hegler Verfahren und Vorrichtung zum Herstellen eines Kabelschutz-Rohres mit Gleitrippen
US20070141284A1 (en) * 2005-12-19 2007-06-21 Saint-Gobain Performance Plastics Corporation Smooth bore flexible fluid conduit
EP1900988A1 (de) * 2006-09-13 2008-03-19 Dipl.-Ing. Dr. Ernst Vogelsang GmbH & Co. KG Kunststoffrohr zur Führung eines Fluids
EP2213440A1 (de) * 2009-01-29 2010-08-04 Brugg Rohr AG, Holding Verfahren zur Herstellung eines wärmeisolierten Leitungsrohres
US8689839B2 (en) 2011-04-15 2014-04-08 Phoenix Geothermal Services, LLC Apparatus for receiving insulation
CN105291192B (zh) * 2015-11-30 2017-07-11 四川南格尔生物科技有限公司 一种袋体剪裁机
EP3374149B1 (en) * 2016-04-13 2019-07-24 Kongsberg Actuation Systems Ltd. Method and apparatus for forming a corrugated fluoropolymer tube
CN110921207B (zh) * 2019-10-31 2021-03-16 安徽万朗磁塑股份有限公司 一种门封条自动转运、分配生产线
CN111229852B (zh) * 2020-02-26 2020-11-06 凯维思轻量化智能制造研究院(菏泽)有限公司 一种实现双向挤压成形工艺的挤压模具、装置及方法
CN112692069B (zh) * 2020-12-30 2022-09-16 浙江传播者金属装饰材料有限公司 一种带有芯棒锁定装置的轧机结构
CN113733618B (zh) * 2021-09-09 2022-06-24 江苏南瑞银龙电缆有限公司 电缆线套波纹管延展加工系统

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045281A (en) * 1958-11-25 1962-07-24 Skobel Max Process and apparatus for making supported sleeving
US3387348A (en) * 1964-11-17 1968-06-11 Crompton & Knowles Corp Device for making an internally coated tubular blank
DE1289297C2 (de) * 1965-04-02 1973-09-06 Kalle Ag Verfahren und Vorrichtung zur kontinuierlichen Herstellung mehrschichtiger Schlaeuche aus thermoplastischen Kunststoffen nach dem Extrusionsverfahren
US3538207A (en) * 1966-12-30 1970-11-03 Gen Cable Corp Pressure equalizer for vulcanizable elastomers for three layer extrusion
AT325299B (de) * 1967-02-27 1975-10-10 Hegler Wilhelm Vorrichtung zur herstellung von rohren aus thermoplastischem kunststoff
US3526692A (en) * 1967-05-26 1970-09-01 Yasuyoshi Onaka Manufacture of wire reinforced plastic pipe
GB1234296A (it) * 1967-08-26 1971-06-03
GB1193939A (en) * 1967-11-29 1970-06-03 Wilhelm Hegler Apparatus for and a Method of Producing Plastics Pipes
US3494812A (en) * 1968-06-17 1970-02-10 Reynolds Metals Co Method and apparatus for making a container having a seamless sleevelike liner
DE2042031A1 (de) * 1970-08-25 1972-05-31 Reifenhaeuser Kg Verfahren und Vorrichtung zur Herstellung von Wellrohren aus thermoplastischem Kunststoff
US3743456A (en) * 1971-08-20 1973-07-03 Acme Hamilton Mfg Corp Adjustable die heads for extruders and the like
US3819778A (en) * 1972-06-13 1974-06-25 Plastic Tubing Method of making and processing corrugated plastic pipe
US3891007A (en) * 1972-07-03 1975-06-24 Dayco Corp Exteriorly corrugated hose of composite materials

Also Published As

Publication number Publication date
CS202541B2 (en) 1981-01-30
NL181638B (nl) 1987-05-04
SU644363A3 (ru) 1979-01-25
DK143492B (da) 1981-08-31
DK552574A (it) 1975-06-16
BE821318A (fr) 1975-04-22
NO141079B (no) 1979-10-01
NO741394L (it) 1975-05-20
AT361703B (de) 1981-03-25
NL181638C (nl) 1990-03-16
IE40322B1 (en) 1979-05-09
DE2450171C2 (de) 1983-04-14
SE7314295L (it) 1975-04-23
DE2450171A1 (de) 1975-04-24
DK143492C (da) 1982-01-11
GB1483113A (en) 1977-08-17
ES431416A1 (es) 1976-10-16
IL45862A0 (en) 1974-12-31
SE381001B (sv) 1975-11-24
CA1053427A (en) 1979-05-01
DD117838A5 (it) 1976-02-05
FI60825C (fi) 1982-04-13
NO141079C (no) 1980-01-09
IL45862A (en) 1977-10-31
JPS5078676A (it) 1975-06-26
US3998579A (en) 1976-12-21
NL7413835A (nl) 1975-04-24
SE7314295A (it) 1975-05-23
FI60825B (fi) 1981-12-31
FI307674A (it) 1975-04-23
FR2248140B1 (it) 1978-11-24
CH591323A5 (it) 1977-09-15
IE40322L (en) 1975-04-22
ATA850074A (de) 1980-08-15
FR2248140A1 (it) 1975-05-16

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