US3887674A - Pipe part with a widened end - Google Patents

Pipe part with a widened end Download PDF

Info

Publication number
US3887674A
US3887674A US375154A US37515473A US3887674A US 3887674 A US3887674 A US 3887674A US 375154 A US375154 A US 375154A US 37515473 A US37515473 A US 37515473A US 3887674 A US3887674 A US 3887674A
Authority
US
United States
Prior art keywords
groove
pipe part
recess
shaped chamber
pipe
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.)
Expired - Lifetime
Application number
US375154A
Inventor
Albertus Anthony Oostenbrink
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.)
Wavin BV
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
Application granted granted Critical
Publication of US3887674A publication Critical patent/US3887674A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
    • F16L47/10—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket the sealing rings being maintained in place by additional means
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/08—Belling or enlarging, e.g. combined with forming a groove using pressure difference
    • 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
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F16L17/03—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips
    • F16L17/032—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips the sealing rings having only one lip
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/218—Pipe machine: socket forming apparatus

Definitions

  • Such an abrupt transition from bottom to side wall can namely only be obtained by providing an annular raised part in the central part of the recess in which the groove-shaped chamber is formed, whereby the plastic material is just driven to the corners to thereby ensure an abrupt transition.
  • a pocket is advantageously formed in the groove bottom on the outer side thereof.
  • My invention relates likewise to a method for manufacturing a pipe part with widened end, in which is a circular groove-shaped chamber, by deforming a pipe part owing to inner overpressure and surrounding the deformed pipe part by a die with at least one recess with a substantially rectangular recess and related to the groove-shaped chamber to be formed.
  • Such a method is known per se but has the drawback that no abrupt transition from the groove bottom to be formed to the most inwards situated side wall can be obtained.
  • the circular raised part merges advantageously by rounded sides with the bottom of the recess.
  • My invention also relates to a formed pipe part obtained while performing the method according to the invention.
  • FIG. 1 shows a section through a pipe connection obtained by using a pipe part according to the invention
  • FIG. 2 shows a section through a die with a plastic pipe heated by blowing, which has adapted itself to the shape of the die, and
  • FIG. 3 shows a muff for connecting tube ends.
  • a pipe part is denoted by l with a widened end 2 in which is a circular groove-shaped chamber 3, the chamber being delimited by two lateral walls 4 and 5 and a bottom of the groove.
  • a sealing ring 7 In the groove-shaped chamber 3 is a sealing ring 7 to which is connected a sealing skirt 8 which penetrates into the recess 2 when a male pipe part 9 is slid into the pipe part 1.
  • the skirt 8 is provided with protrusions 8a which ensure a proper sealing between the widened part 2 and the penetrating pipe part 9.
  • a lock ring 10 with a substantially hoof-shaped cross-section the widest part of which cooperates with the wall 5 of the groove-shaped chamber 3.
  • the wall ends in an end part 11 the smallest diameter of which is smaller than the diameter of the widened part 2 of the pipe.
  • the ring 7 is formed in such a way that it contacts the lateral wall 4 of the groove-shaped chamber and the bottom 6 of the groove-shaped chamber, but on the other hand there rests a particular space between the wall 5 of the groove-shaped chamber 3 and the lateral wall 12 of the rubber ring 7.
  • thermoplastic pipe part 1 is deformed by means of a die 16.
  • This die 16 is provided with a recess 17 into which the plastic material of the pipe part 1 is pressed by blowing due to internal overpressure of air or another gas until the plastics has for the greater part contacted the inner wall of the recess 17. It is, however, very difficult to arrange that the plastic at the location of the point 13 contacts the junction 18 which would-be very desirable to obtain an abrupt transition from the bottom 6 of the groove to the lateral wall 4.
  • the bottom of the recess 17 is provided with a circular raised part 15, whereby when plastic material in heatdeformable condition is pressed, e.g., at a temperature ranging from to for polyvinylchloride, the synthetic material starts flowing in the direction of the junction 18 and as a consequence an abrupt transition is achieved.
  • a pocket which is likewise circular and denoted by 19, is formed on the outer side of the groove-shaped chamber 3.
  • FIG. 3 shows a muff for connecting two pipe ends.
  • the female ends 22 and 23 of the muff are separated by a collar 20 which may also be formed by a blowing technique.
  • the other parts are indicated by the same numerals as used in FIG. 1.
  • groove-shaped chamber comprising deforming a pipe part by introducing internal overpressure and surrounding the pipe part to be deformed by a die with at least one recess, forming the groove-shaped chamber deformed with a substantially rectangular crosssection, defining a recess in said pipe part, the bottom of which is provided with a circular raised part extending all round. and forming an all round extending raised part merging by rounded sides with the bottom of the recess.

Abstract

A plastic pipe end or socket provided with a circuumferential groove, the bottom of the groove being provided with a circumferential recess on the outer side and a corresponding heightening on the inner side of the bottom. The most inwardly situated upstanding wall of the recess merges substantially abruptly with said bottom.

Description

- United States Patent O0stenbrink June 3, 1975 PIPE PART WITH A WIDENED END 2,991,092 7/1961 MacKay 285/231 x 4 1751 n n r: l r n h y Onsienbriuk, 55392;; 3534 350;??? iii/332i Hardenberg, Netherlands REIGN P OR AP NS F0 ATENTS PLICATIO [73] Asslgnee Zwone" Netherlands 207,372 11/1923 United Kingdom 285/231 [22] Filed: June 29, 1973 798,430 3/1936 France 285/231 x [21] Appl' 375154 Primary ExaminerWerner H. Schroeder Assistant Examiner-Peter Nerbun [30] Foreign Application Priority Data Attorney, Agent, or FirmWilkinson, Mawhinney &
June 30, 1972 Netherlands 7209102 Theibault [52] US. Cl. 264/94; 264/296; 285/231; [57] ABSTRACT 285/1 10 A plastic pipe end or socket provided with a circuumlift. Cl. ferential g the bottom of the groove being p Fleld of Search vided a circumferential. recess on the Outer Side 277/DIG. 2; 264/94, 296, 9 99 and a corresponding heightening on the inner side of R f Ct d the bottom,
e erences I e The most inwardly situated upstanding wall of the UNITED STATES PATENTS recess merges substantially abruptly with said bottom. 1,747,942 2/1930 Lanninger 285/231 2,953,398 9/1960 Haugen et al 285/231 X 1 Claim, 3 Drawmg Flgures PIPE PART WITH A WIDENED END DISCLOSURE OF THE PRIOR ART My invention relates to a plastic pipe part with a widened end in which is formed a circular groove-shaped chamber which is delimited by two side walls of the groove and the bottom thereof.
Such pipe parts with widened ends are known. They have, however, the drawback that the bottom of the groove merges fluently with the innermost lateral wall of the groove-shaped chamber, while in order to allow a sealing ring, with skirt protruding from the grooveshaped chamber, to be well retained in the grooveshaped chamber it is desirable that the bottom merges abruptly with the wall.
SUMMARY OF THE INVENTION It is an object of my invention to obviate these difficulties by the arrangement that the bottom of the groove on its inner side is provided with a circular raised bottom part extending all round and formed between the side walls of the groove, while the bottom of the groove merges abruptly with the innermost lateral wall of the groove.
Such an abrupt transition from bottom to side wall can namely only be obtained by providing an annular raised part in the central part of the recess in which the groove-shaped chamber is formed, whereby the plastic material is just driven to the corners to thereby ensure an abrupt transition.
In front of the raised part of the groove bottom a pocket is advantageously formed in the groove bottom on the outer side thereof.
My invention relates likewise to a method for manufacturing a pipe part with widened end, in which is a circular groove-shaped chamber, by deforming a pipe part owing to inner overpressure and surrounding the deformed pipe part by a die with at least one recess with a substantially rectangular recess and related to the groove-shaped chamber to be formed.
Such a method is known per se but has the drawback that no abrupt transition from the groove bottom to be formed to the most inwards situated side wall can be obtained.
It is therefore an object of my invention to obviate these difficulties by the arrangement that between the lateral walls delimiting the recess the bottom of the recess is provided with a circular raised part.
The circular raised part merges advantageously by rounded sides with the bottom of the recess.
My invention also relates to a formed pipe part obtained while performing the method according to the invention.
SURVEY OF THE DRAWINGS FIG. 1 shows a section through a pipe connection obtained by using a pipe part according to the invention;
FIG. 2 shows a section through a die with a plastic pipe heated by blowing, which has adapted itself to the shape of the die, and
FIG. 3 shows a muff for connecting tube ends.
DESCRIPTION OF A PREFERRED EMBODIMENT:
In the FIGURE a pipe part is denoted by l with a widened end 2 in which is a circular groove-shaped chamber 3, the chamber being delimited by two lateral walls 4 and 5 and a bottom of the groove.
In the groove-shaped chamber 3 is a sealing ring 7 to which is connected a sealing skirt 8 which penetrates into the recess 2 when a male pipe part 9 is slid into the pipe part 1. The skirt 8 is provided with protrusions 8a which ensure a proper sealing between the widened part 2 and the penetrating pipe part 9.
In order to retain the ring 7 there is provided a lock ring 10 with a substantially hoof-shaped cross-section the widest part of which cooperates with the wall 5 of the groove-shaped chamber 3.
It should be noted that the wall ends in an end part 11 the smallest diameter of which is smaller than the diameter of the widened part 2 of the pipe.
The ring 7 is formed in such a way that it contacts the lateral wall 4 of the groove-shaped chamber and the bottom 6 of the groove-shaped chamber, but on the other hand there rests a particular space between the wall 5 of the groove-shaped chamber 3 and the lateral wall 12 of the rubber ring 7.
In the known pipe connections in which such a pipe part with widened end and a groove-shaped chamber 3 is used the junction between the bottom 6 of the groove and the innermost side wall 4 of the groove-shaped chamber is rather rounded, so that at the location of the angular point 13 there is a rounded junction. This rounded junction has a drawback since it is possible that hereby the ring 7 is slightly pulled outwards on inserting the penetrating pipe part 9 when the latter comes into contact with the skirt 8 and the protrusions 8a.
It is an object of my invention to obviate these difficulties by providing the bottom of the groove on its inner side with a circular raised portion 14, between the side walls 4 and 5 of the groove, while the bottom of the groove merges abruptly at 13 with the innermost lateral side wall 4 of the groove.
In order to obtain this circular raised part of the bottom of the groove one proceeds as follows when a thermoplastic pipe part 1 is deformed by means of a die 16. This die 16 is provided with a recess 17 into which the plastic material of the pipe part 1 is pressed by blowing due to internal overpressure of air or another gas until the plastics has for the greater part contacted the inner wall of the recess 17. It is, however, very difficult to arrange that the plastic at the location of the point 13 contacts the junction 18 which would-be very desirable to obtain an abrupt transition from the bottom 6 of the groove to the lateral wall 4.
In order to obtain this abrupt transition at the location whereat the bottom 6 merges with the side wall 4 the bottom of the recess 17 is provided with a circular raised part 15, whereby when plastic material in heatdeformable condition is pressed, e.g., at a temperature ranging from to for polyvinylchloride, the synthetic material starts flowing in the direction of the junction 18 and as a consequence an abrupt transition is achieved.
It is obvious that due to the rounded junctions of the groove-shaped raised part 15 a pocket, which is likewise circular and denoted by 19, is formed on the outer side of the groove-shaped chamber 3.
FIG. 3 shows a muff for connecting two pipe ends.
The female ends 22 and 23 of the muff are separated by a collar 20 which may also be formed by a blowing technique. The other parts are indicated by the same numerals as used in FIG. 1.
groove-shaped chamber, comprising deforming a pipe part by introducing internal overpressure and surrounding the pipe part to be deformed by a die with at least one recess, forming the groove-shaped chamber deformed with a substantially rectangular crosssection, defining a recess in said pipe part, the bottom of which is provided with a circular raised part extending all round. and forming an all round extending raised part merging by rounded sides with the bottom of the recess.

Claims (1)

1. A method for manufacturing a plastic pipe part with widened end, in which is provided a circular groove-shaped chamber, comprising deforming a pipe part by introducing internal overpressure and surrounding the pipe part to be deforMed by a die with at least one recess, forming the groove-shaped chamber deformed with a substantially rectangular cross-section, defining a recess in said pipe part, the bottom of which is provided with a circular raised part extending all round, and forming an all round extending raised part merging by rounded sides with the bottom of the recess.
US375154A 1972-06-30 1973-06-29 Pipe part with a widened end Expired - Lifetime US3887674A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7209102A NL7209102A (en) 1972-06-30 1972-06-30

Publications (1)

Publication Number Publication Date
US3887674A true US3887674A (en) 1975-06-03

Family

ID=19816430

Family Applications (1)

Application Number Title Priority Date Filing Date
US375154A Expired - Lifetime US3887674A (en) 1972-06-30 1973-06-29 Pipe part with a widened end

Country Status (18)

Country Link
US (1) US3887674A (en)
JP (1) JPS4957410A (en)
AR (1) AR198420A1 (en)
AU (1) AU464813B2 (en)
BE (1) BE801421A (en)
BR (1) BR7304872D0 (en)
CA (1) CA997393A (en)
DD (1) DD105045A5 (en)
DE (1) DE2332807A1 (en)
DK (1) DK133968B (en)
ES (1) ES416436A1 (en)
FR (1) FR2191053B3 (en)
GB (1) GB1407895A (en)
IE (1) IE38156B1 (en)
IT (1) IT986242B (en)
NL (1) NL7209102A (en)
TR (1) TR17545A (en)
ZA (1) ZA734451B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006757A (en) * 1975-02-28 1977-02-08 Polva Nederland B.V. Pipe bell end having a thickened portion and apparatus for forming the bell end
US4275909A (en) * 1977-11-22 1981-06-30 Kubota Ltd. Flexible plastic pipe joint
US4474723A (en) * 1982-04-23 1984-10-02 Wavin B.V. Method and apparatus for providing a plastic pipe part with a socket end
US4723905A (en) * 1985-03-18 1988-02-09 Vassallo Research And Development Corporation Pipe belling apparatus
US5653935A (en) * 1994-06-03 1997-08-05 Forsheda Ab Method for manufacturing a thermoplastic pipe
US6874822B2 (en) * 2001-09-07 2005-04-05 Toyoda Gosei Co., Ltd. Resinous tube
US20090295153A1 (en) * 2008-05-27 2009-12-03 Springseal, Inc. Pipe coupling assembly
US8801049B2 (en) 2011-04-29 2014-08-12 Springseal, Inc. Pipe coupling system and method
US20170191598A1 (en) * 2014-05-22 2017-07-06 Schlemmer Gmbh Coupling arrangement for a domestic appliance, a device for a domestic appliance, and a domestic appliance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725579C3 (en) * 1977-06-07 1981-08-13 Karl Heinz 3353 Bad Gandersheim Vahlbrauk Device for connecting two pipe ends
DE4108199C2 (en) * 1991-03-14 1995-01-05 Friatec Keramik Kunststoff Connection arrangement of a pipeline
DE202007015991U1 (en) * 2007-11-14 2009-03-19 Rehau Ag + Co connecting kit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1747942A (en) * 1922-10-14 1930-02-18 Lanninger Karl Pipe line
US2953398A (en) * 1956-05-28 1960-09-20 United States Pipe Foundry Pipe joint
US2991092A (en) * 1957-07-05 1961-07-04 American Cast Iron Pipe Co Pipe coupling having a double sealing action gasket
US3791678A (en) * 1972-02-22 1974-02-12 Wavin Bv Pipe coupling
US3836622A (en) * 1971-07-01 1974-09-17 Forsheda Ideutveckling Ab Method of forming pipes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1747942A (en) * 1922-10-14 1930-02-18 Lanninger Karl Pipe line
US2953398A (en) * 1956-05-28 1960-09-20 United States Pipe Foundry Pipe joint
US2991092A (en) * 1957-07-05 1961-07-04 American Cast Iron Pipe Co Pipe coupling having a double sealing action gasket
US3836622A (en) * 1971-07-01 1974-09-17 Forsheda Ideutveckling Ab Method of forming pipes
US3791678A (en) * 1972-02-22 1974-02-12 Wavin Bv Pipe coupling

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006757A (en) * 1975-02-28 1977-02-08 Polva Nederland B.V. Pipe bell end having a thickened portion and apparatus for forming the bell end
US4275909A (en) * 1977-11-22 1981-06-30 Kubota Ltd. Flexible plastic pipe joint
US4474723A (en) * 1982-04-23 1984-10-02 Wavin B.V. Method and apparatus for providing a plastic pipe part with a socket end
US4723905A (en) * 1985-03-18 1988-02-09 Vassallo Research And Development Corporation Pipe belling apparatus
US5653935A (en) * 1994-06-03 1997-08-05 Forsheda Ab Method for manufacturing a thermoplastic pipe
US6874822B2 (en) * 2001-09-07 2005-04-05 Toyoda Gosei Co., Ltd. Resinous tube
US20090295153A1 (en) * 2008-05-27 2009-12-03 Springseal, Inc. Pipe coupling assembly
US8727387B2 (en) * 2008-05-27 2014-05-20 Springseal, Inc. Pipe coupling assembly
US9752711B2 (en) 2008-05-27 2017-09-05 Springseal, Inc. Pipe coupling assembly
USD865918S1 (en) 2008-05-27 2019-11-05 Springseal, Inc. Coupling assembly
USD980954S1 (en) 2008-05-27 2023-03-14 Springseal, Inc. Coupling assembly
US8801049B2 (en) 2011-04-29 2014-08-12 Springseal, Inc. Pipe coupling system and method
US20170191598A1 (en) * 2014-05-22 2017-07-06 Schlemmer Gmbh Coupling arrangement for a domestic appliance, a device for a domestic appliance, and a domestic appliance
US10738930B2 (en) * 2014-05-22 2020-08-11 Schlemmer Gmbh Coupling arrangement for a domestic appliance, a device for a domestic appliance, and a domestic appliance

Also Published As

Publication number Publication date
IE38156B1 (en) 1978-01-04
IT986242B (en) 1975-01-20
DK133968B (en) 1976-08-23
AU464813B2 (en) 1975-09-04
NL7209102A (en) 1974-01-02
CA997393A (en) 1976-09-21
DD105045A5 (en) 1974-04-05
AR198420A1 (en) 1974-06-21
GB1407895A (en) 1975-10-01
BR7304872D0 (en) 1974-08-29
IE38156L (en) 1973-12-30
AU5762273A (en) 1975-01-09
BE801421A (en) 1973-12-26
DK133968C (en) 1977-01-31
ES416436A1 (en) 1976-03-01
JPS4957410A (en) 1974-06-04
DE2332807A1 (en) 1974-01-17
FR2191053A1 (en) 1974-02-01
FR2191053B3 (en) 1976-06-18
ZA734451B (en) 1974-05-29
TR17545A (en) 1975-07-23

Similar Documents

Publication Publication Date Title
US3887674A (en) Pipe part with a widened end
US4826028A (en) Gasket seating ring
US3484900A (en) Tubing and piping of thermoplastics material
CA1273186A (en) Method and apparatus for seating a gasket in a large diameter bell
SE7703965L (en) PLASTIC COUPLING AND PROCEDURE FOR ITS MANUFACTURE
DK159668C (en) CONNECTOR NIPPLE FOR INSULATION BEARS WITH EXTERNAL RIBBES
US4984831A (en) Pipe socket and a method of forming a pipe socket
JPH05196022A (en) Leakage preventive insert
EP0013458B1 (en) A plastics pipe provided with a socket and method of forming such a plastics pipe
US3265410A (en) Pipe of synthetic plastic material and coupling including said pipe
IE46558B1 (en) Plastics sockets pipe and method of manufacturing same
US3791678A (en) Pipe coupling
US3936081A (en) Pipe joint and method of making same
US3956817A (en) Method of making a pipe joint
JPS62116119A (en) Molding process for sleeve of corrugated tube
US3198683A (en) Apparatus for sealing and folding flanged edges of containers
JPH05318565A (en) Hollow member having soft assembling part and production thereof
IE44418B1 (en) Improvements in or relating to pipe sockets
GB1146453A (en) Improvements in or relating to clamp couplings for rapid connection of pipes or tubes of metal or plastics material
JPS6131351B2 (en)
GB1124930A (en) Improvements relating to tubing and piping of thermoplastics material
EP0842755A4 (en) Method of processing tube container and apparatus for processing the same
US4193426A (en) Plastic socket pipe part
GB1205816A (en) Pipe connection for synthetic plastics pipes for house sewers
GB1315719A (en) Pipe coupling