AU739397B2 - Plastic band for the production of helical wound pipes - Google Patents
Plastic band for the production of helical wound pipes Download PDFInfo
- Publication number
- AU739397B2 AU739397B2 AU25606/97A AU2560697A AU739397B2 AU 739397 B2 AU739397 B2 AU 739397B2 AU 25606/97 A AU25606/97 A AU 25606/97A AU 2560697 A AU2560697 A AU 2560697A AU 739397 B2 AU739397 B2 AU 739397B2
- Authority
- AU
- Australia
- Prior art keywords
- band
- ribs
- grooves
- rib
- plastic band
- 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.)
- Ceased
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000005755 formation reaction Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 2
- IHPYMWDTONKSCO-UHFFFAOYSA-N 2,2'-piperazine-1,4-diylbisethanesulfonic acid Chemical compound OS(=O)(=O)CCN1CCN(CCS(O)(=O)=O)CC1 IHPYMWDTONKSCO-UHFFFAOYSA-N 0.000 description 1
- 239000007990 PIPES buffer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Moulding By Coating Moulds (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): NUEVA AG Invention Title: PLASTIC BAND FOR THE PRODUCTION OF HELICAL WOUND PIPES a. r a i.* a a.* a.* a a a.
a a o o ooooo The following statement is a full description of this invention, including the best method of performing it known to me/us: Plastic Band for the Production of Helical Wound Pipes The present invention relates to a plastic band for the production of helical wound pipes, with coupling ribs having enlarged heads and with at least partly undercut grooves extending along the edges of the bands for forming a coupling between adjacent band edges, whereby ribs and grooves at both band edges are designed complimentary relative to each other.
The production of wound pipes by means of plastic bands of the kind mentioned above is generally known. Independently **e e S"from a using of single or double walled profiles or bands, resp., the coupling between adjacent band edges forms the weak reaion of such pipes. This problem comes to be a risk factor specifically by pipes which in operation are subjected to pressure and at pipes which are entrenched in the ground.
above mentioned snap connections between adjacent o .band edges were suitable for extraordinary elastic band materials and accordingly specifically for the production of insulating pipes for existing pipe lines or electrical cables. In case of higher stresses the coupling area had as a rule to be provided with an additional protective coating or an additional closure band.
Object of the present invention has how been to provide a plastic band for the production of helical wound pipes of the kind defined above, which ensures by a simple, low cost 2 design a problem less coupling between the band edges at a large variety of conditions.
According to the present invention there is provided a plastic band for the production of helically wound pipes, the plastic band including: two ribs having enlarged head formations extending along edge portions of the band; and two grooves extending along the edge portions and having at least partially undercut formations; wherein the first of said ribs is an outer rib :o.I located adjacent with an edge of the band and the second of said ribs is an inner rib located inwardly along the :o band from the outer rib, the first of said grooves is an 15 outer groove located between said inner and outer ribs, :i the second of said grooves is an inner groove located inwardly along the band from the inner rib, the inner groove has a cross section which corresponds substantially .to the cross section of said outer rib, and the thickness 20 of the inner rib is less than the width of the outer S. groove, wherein adjacent band edges can be coupled together by the inner ribs of both the adjacent band edges elastically deforming in a direction toward each other, such that the head formation of the inner ribs engage the undercut formations of the outer grooves.
Hereinafter, the invention will be explained in more detail based on a embodiment illustrated in the drawing, wherein: Fig. 1 is a cross section through a plastic band structured in accordance with the invention; Fig. 2 is a section through the area of the connection (coupling) between two adjacent band edges; and H:\HeenF\Keep\speci\25606.97Speci.doc 13/08/01 2A Fig. 3 illustrates a band edge on a somewhat enlarged scale.
S
S.
S
S
H:\HelenF\Keep\speci\25606.97Speci-doc 13/08/01 3 Fig. 1 of the drawing depicts a cross section through a plastic band.
Fig. 2 of the drawing illustrates two adjacent, complimentary designed band edges 1, 2 after having been joined during the winding of a pipe. The two band edges 1, 2 are formed by the parallel edges of a single plastic band of which the edges are designed in a complimentary manner, and which are joined together in from of a snap coupling for the forming of a pipe.
Fig. 3 depicts the design of one of the two band edges 1 on a enlarged scale (the second band edge 2 located at the left side is designed in a complimentary mirrored manner) The band is designed as a hollow profile or double walled band, resc,, having the band walls 3, 4 and features e.g. a thickness of 12-15 mm. Outer and inner ribs 5 and 6, resp.
and outer and an inner grooves 7 and 8, resp. are formed along the edge of the band. The front surface 9 extends from the band surface 10 slightly inclined inwards (wedge surface) and the groove edge 8' is designed complimentary thereto, whereby the front surface 9' of the band edge to be coupled thereto comes to abut the surface 8' The groove 7 is formed between the rib flanks 5' and 6', while the second groove 8 is located between the groove flank 6" and the surface 8' The groove 8 has a cross section which corresponds substantially to the cross section of the complimentary outer rib of the adjoining band edge (small clearance, only).
4 Different, however, is the groove 7 which has to receive the complimentary inner rib of the adjoining band edge of which groove the width is substantially larger than the thickness of the rib to be received (see Fig. 1).
When joining the two band edges 1,2 the inner ribs can elastically yield during the snapping of the rib heads of the ribs 6 into the grooves 8, and after the joining process they can again move back into the normal position.
Such as can be clearly seen in the drawing, the ribs 5, 6 comprise broadened heads facing the grooves 7 and 8, resp., which engage under each other during the joining, i.e. they form a undercut of the grooves 7 and 8,resp.
As illustrated in Fig. 1, elastomeric sealing ledges 11, 12 can be foreseen on the rib heads or on the groove bottoms located directly opposite thereof such to form a leakage tight connection.
.o *oo•
Claims (7)
1. A plastic band for the production of helically wound pipes, the plastic band including: two ribs having enlarged head formations extending along edge portions of the band; and two grooves extending along the edge portions and having at least partially undercut formations; wherein the first of said ribs is an outer rib located adjacent with an edge of the band and the second of said ribs is an inner rib located inwardly along the band from the outer rib, the first of said grooves is an outer groove located between said inner and outer ribs, o: the second of said grooves is an inner groove located inwardly along the band from the inner rib, the inner groove has a cross section which corresponds substantially to the cross section of said outer rib, and the thickness of the inner rib is less than the width of the outer groove, wherein adjacent band edges can be coupled 20 together by the inner ribs of both the adjacent band edges elastically deforming in a direction toward each other, such that the head formation of the inner ribs engage the undercut formations of the outer grooves.
2. The plastic band according to claim 1, characterized in that the ribs extending along the edge portions of the band include a front surface which is chamfered from the surface of the band slightly wedge like toward the inside.
3. The plastic band according to claim 1 or 2, characterized in that the width of said edge portion having said ribs and grooves is less than the thickness of the band.
4. The plastic band according to any one of the claims 1 to 3, characterized in that the band has a double H:\HelenF\Keep\speci\25606.97Speci.doc 13/08/01 6 walled or hollow profile.
The plastic band according to any one of the claims 1 to 4, characterized in that an elastomeric sealing means is located on the head formations of the ribs and/or on bottoms of the grooves so that a leakage tight coupling can be formed.
6. The plastic band according to any one of the claims 1 to 5, characterized in that the outer groove is formed by the flanks of the two ribs and the one flank of the inner groove is formed by a flank of the inner rib, whereby the head formations of the ribs on one side project in this manner over the ribs.
7. A plastic band for the production of helically 0* wound pipes substantially as herein described with reference to the accompanying drawings. O 20 Dated this 13th day of AUGUST 2001 NUEVA AG By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia H:\HelenF\Keep\speci\25606.97Speci.doc 13/08/01
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH272796 | 1996-11-05 | ||
| CH2727/96 | 1996-11-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2560697A AU2560697A (en) | 1998-05-07 |
| AU739397B2 true AU739397B2 (en) | 2001-10-11 |
Family
ID=4240254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU25606/97A Ceased AU739397B2 (en) | 1996-11-05 | 1997-06-19 | Plastic band for the production of helical wound pipes |
Country Status (15)
| Country | Link |
|---|---|
| KR (1) | KR100486314B1 (en) |
| CN (1) | CN1079727C (en) |
| AR (1) | AR013593A1 (en) |
| AU (1) | AU739397B2 (en) |
| BR (1) | BR9705176A (en) |
| CO (1) | CO4560566A1 (en) |
| HN (1) | HN1997000008A (en) |
| ID (1) | ID17298A (en) |
| IL (1) | IL121390A (en) |
| MY (1) | MY130977A (en) |
| NZ (1) | NZ329091A (en) |
| PA (1) | PA8427401A1 (en) |
| PE (1) | PE46598A1 (en) |
| SV (1) | SV1997000019A (en) |
| ZA (1) | ZA975939B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102046350B (en) * | 2008-05-28 | 2013-11-27 | 株式会社普利司通 | Mold for foam molding and foam molding method |
| CN103453239B (en) * | 2013-09-17 | 2015-07-08 | 河北金菱管业股份有限公司 | Spiral-hooping-reinforced stainless steel gas pipe and special production equipment and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4053978A (en) * | 1977-10-18 | 1980-05-01 | Rib Loc International Limited | Spiral plastic pipe and method of manufacture |
| BE891111A (en) * | 1981-10-13 | 1982-05-13 | Johns Manville | IMPROVED TUBULAR OBJECTS IN PLASTICS |
| AU4853985A (en) * | 1984-10-15 | 1986-04-24 | Technosearch Pty. Limited | Fastening strips by projections and grooves |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3199541A (en) * | 1963-04-03 | 1965-08-10 | Flexible Tubing Corp | Interlocking strip flexible hose |
| DE2728827B2 (en) * | 1977-06-27 | 1979-05-03 | Ford-Werke Ag, 5000 Koeln | Heat exchangers, in particular for motor vehicles |
| US4209043A (en) * | 1977-10-18 | 1980-06-24 | Rib Loc (Hong Kong) Ltd. | Plastic tubular objects |
| US4566496A (en) * | 1981-10-13 | 1986-01-28 | J-M Manufacturing Company, Inc. | Tubular plastics objects |
| CH673981A5 (en) * | 1987-08-25 | 1990-04-30 | Ametex Ag | |
| CH685135A5 (en) * | 1990-10-24 | 1995-03-31 | Ersag Systeme Ag | A method for joining work-pieces made of plastic. |
| US5660912A (en) * | 1993-07-14 | 1997-08-26 | Rib Loc Australia Pty Ltd | Plastic profiled strip forming helically wound tube using hinged flap for jointing |
-
1997
- 1997-01-20 HN HN1997000008A patent/HN1997000008A/en unknown
- 1997-02-12 PE PE1997000091A patent/PE46598A1/en not_active IP Right Cessation
- 1997-03-12 SV SV1997000019A patent/SV1997000019A/en active IP Right Grant
- 1997-04-02 CO CO97016587A patent/CO4560566A1/en unknown
- 1997-04-18 PA PA19978427401A patent/PA8427401A1/en unknown
- 1997-06-19 AU AU25606/97A patent/AU739397B2/en not_active Ceased
- 1997-06-25 MY MYPI97002863A patent/MY130977A/en unknown
- 1997-06-27 CN CN97113534A patent/CN1079727C/en not_active Expired - Fee Related
- 1997-07-03 ZA ZA9705939A patent/ZA975939B/en unknown
- 1997-07-04 AR ARP970103011A patent/AR013593A1/en unknown
- 1997-07-24 IL IL12139097A patent/IL121390A/en not_active IP Right Cessation
- 1997-08-05 ID IDP972705A patent/ID17298A/en unknown
- 1997-09-12 KR KR1019970047010A patent/KR100486314B1/en not_active Expired - Fee Related
- 1997-10-30 BR BR9705176A patent/BR9705176A/en not_active IP Right Cessation
- 1997-11-03 NZ NZ329091A patent/NZ329091A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4053978A (en) * | 1977-10-18 | 1980-05-01 | Rib Loc International Limited | Spiral plastic pipe and method of manufacture |
| BE891111A (en) * | 1981-10-13 | 1982-05-13 | Johns Manville | IMPROVED TUBULAR OBJECTS IN PLASTICS |
| AU4853985A (en) * | 1984-10-15 | 1986-04-24 | Technosearch Pty. Limited | Fastening strips by projections and grooves |
Also Published As
| Publication number | Publication date |
|---|---|
| IL121390A (en) | 2001-03-19 |
| MY130977A (en) | 2007-07-31 |
| ZA975939B (en) | 1998-02-02 |
| BR9705176A (en) | 1999-03-09 |
| HN1997000008A (en) | 1997-06-18 |
| KR100486314B1 (en) | 2005-07-11 |
| MX9701269A (en) | 1998-05-31 |
| AU2560697A (en) | 1998-05-07 |
| NZ329091A (en) | 1998-08-26 |
| PE46598A1 (en) | 1998-08-27 |
| CN1079727C (en) | 2002-02-27 |
| ID17298A (en) | 1997-12-18 |
| PA8427401A1 (en) | 2000-05-24 |
| KR19980041880A (en) | 1998-08-17 |
| IL121390A0 (en) | 1998-01-04 |
| SV1997000019A (en) | 1997-08-29 |
| CO4560566A1 (en) | 1998-02-10 |
| CN1181305A (en) | 1998-05-13 |
| AR013593A1 (en) | 2001-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |