CA2307785A1 - Pipe mold with multiple sources of plastic supply - Google Patents
Pipe mold with multiple sources of plastic supply Download PDFInfo
- Publication number
- CA2307785A1 CA2307785A1 CA002307785A CA2307785A CA2307785A1 CA 2307785 A1 CA2307785 A1 CA 2307785A1 CA 002307785 A CA002307785 A CA 002307785A CA 2307785 A CA2307785 A CA 2307785A CA 2307785 A1 CA2307785 A1 CA 2307785A1
- Authority
- CA
- Canada
- Prior art keywords
- plastic
- pipe
- source
- passage
- delivery
- 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.)
- Abandoned
Links
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
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
- B29C48/705—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows in the die zone, e.g. to create flow homogeneity
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- 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
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
-
- 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
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29L2023/18—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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A pipe molding apparatus uses multiple supplies of plastic to form double wall pipe. The apparatus includes die equipment having first and second delivery passages delivering the plastic from the multiple sources to a pipe mold where the pipe is formed with outer and inner walls. The die equipment includes a plastic separator which separates the plastic in advance of the delivery passages to determine which particular supply of plastic goes to which particular delivery passage.
Description
TITLE: PIPE MOLD WITH MULTIPLE SOURCES OF PLASTIC SUPPLY
FIELD OF THE INVENTION
The present invention relates to a pipe mold which uses multiple sources of plastic to form a pipe.
BACKGROUND OF THE INVENTION
A conventional pipe mold is one which uses a single source of plastic to form a pipe. If the pipe has a double wall construction then the plastic supplied from the single source is used to form both the outer and the inner wall of the pipe. This leaves no opportunity to use different materials or at least different grades of the same material in the walls of the pipe.
SUMMARY OF THE PRESENT INVENTION
The present invention provides a pipe molding apparatus which uses multiple supplies of plastic to form double wall pipe. The apparatus includes die equipment having first and second delivery passages delivering the plastic from the multiple supplies to a pipe mold where the pipe is formed with inner and outer walls. The die equipment includes a plastic separator which separates the plastic from the different supplies in advance of the delivery passages to determine which particular supply of plastic going to a particular delivery passage.
For example the apparatus may be fed with first and second supplies of plastic. The separator may be set such that all of the plastic from the first supply goes to the first delivery passage and all of the plastic from the second supply goes to the second delivery passage.
Alternatively, some of the plastic from the first supply may go to the second delivery passage or some of the
FIELD OF THE INVENTION
The present invention relates to a pipe mold which uses multiple sources of plastic to form a pipe.
BACKGROUND OF THE INVENTION
A conventional pipe mold is one which uses a single source of plastic to form a pipe. If the pipe has a double wall construction then the plastic supplied from the single source is used to form both the outer and the inner wall of the pipe. This leaves no opportunity to use different materials or at least different grades of the same material in the walls of the pipe.
SUMMARY OF THE PRESENT INVENTION
The present invention provides a pipe molding apparatus which uses multiple supplies of plastic to form double wall pipe. The apparatus includes die equipment having first and second delivery passages delivering the plastic from the multiple supplies to a pipe mold where the pipe is formed with inner and outer walls. The die equipment includes a plastic separator which separates the plastic from the different supplies in advance of the delivery passages to determine which particular supply of plastic going to a particular delivery passage.
For example the apparatus may be fed with first and second supplies of plastic. The separator may be set such that all of the plastic from the first supply goes to the first delivery passage and all of the plastic from the second supply goes to the second delivery passage.
Alternatively, some of the plastic from the first supply may go to the second delivery passage or some of the
- 2 -plastic from the second supply may go to the first delivery passage.
BRIEF DESCRIPTION OF THE DRAWINGS
The above as well as other advantages and features of the present invention will be described in greater detail according to the preferred embodiments of the present invention in which;
Figure 1 is a sectional view through a pipe molding apparatus fed with multiple supplies of plastic according to a preferred embodiment of the invention;
Figure 2 is an enlarged sectional view of the delivery passage region of the apparatus of Figure 1;
Figure 3 is a further enlarged sectional view through the delivery passage area showing the flow of plastic therethrough;
Figures 4 through 6 are sectional views of pipe wall constructions of double wall pipe made in accordance with various different preferred embodiments of the invention.
DETAILED DESCRIPTION ACCORDING TO THE PREFERRED EMBODIMENTS
OF THE PRESENT INVENTION IN WHICH:
Figure 1 shows a pipe molding apparatus generally indicated at 1. This apparatus has die equipment 3 and an actual molding region 5 where plastic pipe is formed. The molding region may be formed by mold blocks moving through a mold tunnel as is known in the art. The pipe formed is double wall pipe having inner and outer pipe walls as will be better described with respect to Figures 4 through 6.
Die equipment 3 is in accordance with the present invention, fed plastic by multiple plastic supplies, namely plastic supplies 7 and 9. As will be understood from SJ-10.848CA
BRIEF DESCRIPTION OF THE DRAWINGS
The above as well as other advantages and features of the present invention will be described in greater detail according to the preferred embodiments of the present invention in which;
Figure 1 is a sectional view through a pipe molding apparatus fed with multiple supplies of plastic according to a preferred embodiment of the invention;
Figure 2 is an enlarged sectional view of the delivery passage region of the apparatus of Figure 1;
Figure 3 is a further enlarged sectional view through the delivery passage area showing the flow of plastic therethrough;
Figures 4 through 6 are sectional views of pipe wall constructions of double wall pipe made in accordance with various different preferred embodiments of the invention.
DETAILED DESCRIPTION ACCORDING TO THE PREFERRED EMBODIMENTS
OF THE PRESENT INVENTION IN WHICH:
Figure 1 shows a pipe molding apparatus generally indicated at 1. This apparatus has die equipment 3 and an actual molding region 5 where plastic pipe is formed. The molding region may be formed by mold blocks moving through a mold tunnel as is known in the art. The pipe formed is double wall pipe having inner and outer pipe walls as will be better described with respect to Figures 4 through 6.
Die equipment 3 is in accordance with the present invention, fed plastic by multiple plastic supplies, namely plastic supplies 7 and 9. As will be understood from SJ-10.848CA
- 3 -Figure 1, the plastic supplied by supply 9 is externally surrounded by the plastic supplied by supply 7.
By way of example only, supply 9 may feed a pure grade of plastic, e.g. polyethylene while supply 7 may feed a lower grade of plastic, e.g. recycled polyethylene to the die equipment. For reasons to be described later in detail, this will produce a pipe having an inner wall comprising or at least substantially comprising the higher grade plastic and an outer wall comprising or at least substantially comprising the lower grade plastic. In the alternative, the supplies can be reversed depending upon the desired use of the pipe.
The plastic from both supplies enters a single delivery passage 11 of the die equipment. This passage delivers the plastic to first and second delivery passages 13 and 15 interiorly of the pipe mold 5. The plastic delivered into the mold through passage 13 forms the outer wall of the pipe while the plastic delivered through passage 15 forms the inner wall of the pipe.
Located in advance of passages 13 and 15 is a plastic separator 17. This separator determines which plastic goes to which of the two delivery passages 13 and 15.
Again by way of example only, Figure 3 shows that separator 17 is set up such that all of the plastic P1, which is the plastic from supply 7, and some of the plastic P2, which is the plastic from supply 9, is fed along passage 13. The remainder of the plastic P2 is fed along passage 15.
Figures 4 through 6 show different pipe wall constructions which are possible when working with two SJ-10~848CA
By way of example only, supply 9 may feed a pure grade of plastic, e.g. polyethylene while supply 7 may feed a lower grade of plastic, e.g. recycled polyethylene to the die equipment. For reasons to be described later in detail, this will produce a pipe having an inner wall comprising or at least substantially comprising the higher grade plastic and an outer wall comprising or at least substantially comprising the lower grade plastic. In the alternative, the supplies can be reversed depending upon the desired use of the pipe.
The plastic from both supplies enters a single delivery passage 11 of the die equipment. This passage delivers the plastic to first and second delivery passages 13 and 15 interiorly of the pipe mold 5. The plastic delivered into the mold through passage 13 forms the outer wall of the pipe while the plastic delivered through passage 15 forms the inner wall of the pipe.
Located in advance of passages 13 and 15 is a plastic separator 17. This separator determines which plastic goes to which of the two delivery passages 13 and 15.
Again by way of example only, Figure 3 shows that separator 17 is set up such that all of the plastic P1, which is the plastic from supply 7, and some of the plastic P2, which is the plastic from supply 9, is fed along passage 13. The remainder of the plastic P2 is fed along passage 15.
Figures 4 through 6 show different pipe wall constructions which are possible when working with two SJ-10~848CA
- 4 -separate supplies of plastic.
Figure 4 shows a double wall pipe 21 having an outer pipe wall 23 formed by all of the plastic P1 and some of the plastic P2. Pipe 21 also has an inner pipe wall which is formed only by plastic P2 which is the remainder of this particular plastic not taken up by the outer pipe wall.
Pipe 21 is made in accordance with the separation of plastic shown in Figure 3.
Figure 5 shows a double wall pipe 27 having outer and inner walls 29 and 31 respectively.
To achieve the pipe construction of Figure 5, the plastic separator is set up to completely separate the individual supplies of plastic such that all of the plastic P1 goes to passage 13 in forming the outer pipe wall and all of the plastic P2 goes to passage 17 to form pipe wall 31.
Figure 6 shows a double wall pipe 33 with still a different separation of plastic. More particularly the separator is set up such that only some o the plastic P1 goes to the passage 13 to form the outer pipe wall 35, while the rest o the plastic P1 and all of the plastic P2 goes to passage 15 to form the inner pipe wall 37.
It is to be understood that although only two supplies of plastic are shown, the concept of the plastic separation also applies to more than two supplies of plastic. For example, a third supply of plastic could be introduced interiorly of supply 9 and the separator could be set that some or all of this supply goes to the inner pipe wall with the outer supplies going to the outer pipe ~J-10848CA
Figure 4 shows a double wall pipe 21 having an outer pipe wall 23 formed by all of the plastic P1 and some of the plastic P2. Pipe 21 also has an inner pipe wall which is formed only by plastic P2 which is the remainder of this particular plastic not taken up by the outer pipe wall.
Pipe 21 is made in accordance with the separation of plastic shown in Figure 3.
Figure 5 shows a double wall pipe 27 having outer and inner walls 29 and 31 respectively.
To achieve the pipe construction of Figure 5, the plastic separator is set up to completely separate the individual supplies of plastic such that all of the plastic P1 goes to passage 13 in forming the outer pipe wall and all of the plastic P2 goes to passage 17 to form pipe wall 31.
Figure 6 shows a double wall pipe 33 with still a different separation of plastic. More particularly the separator is set up such that only some o the plastic P1 goes to the passage 13 to form the outer pipe wall 35, while the rest o the plastic P1 and all of the plastic P2 goes to passage 15 to form the inner pipe wall 37.
It is to be understood that although only two supplies of plastic are shown, the concept of the plastic separation also applies to more than two supplies of plastic. For example, a third supply of plastic could be introduced interiorly of supply 9 and the separator could be set that some or all of this supply goes to the inner pipe wall with the outer supplies going to the outer pipe ~J-10848CA
- 5 -wall.
The description above relates to multiple sources of different grades of plastic, i.e. one high grade plastic and one lower grade of plastic that may be recycled and that may contain fillers. The same concept equally applies to other different sources of plastic where the pipe may be formed for example by a combination of dense and foamed plastics.
Although various preferred embodiments of the present invention have been described in detail, it will be appreciated by those skilled in the art that variations may be made without departing from the spirit of the invention or the scope of the appended claims.
The description above relates to multiple sources of different grades of plastic, i.e. one high grade plastic and one lower grade of plastic that may be recycled and that may contain fillers. The same concept equally applies to other different sources of plastic where the pipe may be formed for example by a combination of dense and foamed plastics.
Although various preferred embodiments of the present invention have been described in detail, it will be appreciated by those skilled in the art that variations may be made without departing from the spirit of the invention or the scope of the appended claims.
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Pipe molding apparatus comprising first and second sources of plastic feeding to die equipment having first and second delivery passages to deliver the plastic to a pipe mold where the pipe is formed with inner and outer walls from the first and second passages respectively, said die equipment further including a plastic separator which is in advance of the first and second passages and which sets separation of the plastic to determine amount of the plastic from the first source and amount of plastic from the second source entering the first and second delivery passages of the die equipment.
2. Pipe molding apparatus as claimed in Claim 1, wherein the plastic separator sets separation of the plastic such that all of the plastic from the first source enters the first delivery passage and all of the plastic from the second source enters the second delivery passage.
3. Pipe molding apparatus as claimed in Claim 1, wherein the plastic separator sets separation of the plastic such that some of the plastic from the first source enters the first delivery passage, and some of the plastic from the first source and all of the plastic from the second source enters the second delivery passage.
4. Pipe molding apparatus as claimed in Claim 1, wherein the plastic separator sets separation of the plastic such that all of the plastic from the first source and some of the plastic from the second source enters the first delivery passage, and some of the plastic from the plastic from the second source enters the second delivery passage.
5. Pipe molding apparatus comprising first and second sources of plastic feeding to die equipment having first and second delivery passages which delivery the plastic to a pipe mold where the pipe is formed with inner and outer pipe walls from the plastic delivered through the first and second passages, the first passage delivering at least some of the plastic from the first plastic source and the second passage delivery at least some of the plastic from the second plastic source to the pipe mold.
6. Pipe molding apparatus as claimed in Claim 5, wherein the first passage delivers all of the plastic from the first plastic source and the second delivery passage delivers all of the plastic from the second plastic source to the pipe mold.
7. Pipe molding apparatus as claimed in Claim 5, wherein said first passage delivers all of the plastic from the first plastic source and some of the plastic from the second plastic source and said second passage delivers only some of the plastic from the second plastic source to the pipe mold.
8. Pipe molding apparatus as claimed in Claim 5, wherein said first passage delivers only some of the plastic from the first source and said second passage also delivers some of the plastic from first plastic source and all of the plastic from the second plastic source to the pipe mold.
9. Pipe molding apparatus comprising multiple supplies of plastic feeding to die equipment having first and second delivery passages which deliver the plastic to a pipe mold where the pipe is formed with inner and outer pipe walls from the plastic delivered through the first and second delivery passage, said die equipment having a plastic separation in advance of the delivery channels which determines which supply of plastic enters which delivery passage.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002307785A CA2307785A1 (en) | 2000-05-08 | 2000-05-08 | Pipe mold with multiple sources of plastic supply |
| AU2001254573A AU2001254573A1 (en) | 2000-05-08 | 2001-05-01 | Pipe mold with multiple sources of plastic supply |
| PCT/CA2001/000593 WO2001085433A1 (en) | 2000-05-08 | 2001-05-01 | Pipe mold with multiple sources of plastic supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002307785A CA2307785A1 (en) | 2000-05-08 | 2000-05-08 | Pipe mold with multiple sources of plastic supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2307785A1 true CA2307785A1 (en) | 2001-11-08 |
Family
ID=4166099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002307785A Abandoned CA2307785A1 (en) | 2000-05-08 | 2000-05-08 | Pipe mold with multiple sources of plastic supply |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2001254573A1 (en) |
| CA (1) | CA2307785A1 (en) |
| WO (1) | WO2001085433A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019014746A1 (en) * | 2017-07-20 | 2019-01-24 | Lupke Manfred Arno Alfred | Coilable pipe with minimally angled corrugations |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102689134B (en) * | 2011-03-24 | 2015-07-15 | 深圳亿和模具制造有限公司 | Process for machining annular water paths at elbow-row position of plastic die |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4846660A (en) * | 1984-07-18 | 1989-07-11 | Contech Construction Products Inc. | Apparatus for producing double wall pipe |
| US4770618A (en) * | 1986-01-15 | 1988-09-13 | Lupke Manfred Arno Alfred | Extrusion die for two-ply plastic tubing |
| US4731002A (en) * | 1986-11-19 | 1988-03-15 | American Maplan Corporation | Triple-wall foam coextrusion apparatus |
| DE4111229A1 (en) * | 1991-04-08 | 1992-10-15 | Wilhelm Hegler | DEVICE FOR PRODUCING PLASTIC TUBES |
| DE29813235U1 (en) * | 1998-03-09 | 1998-12-03 | Lupke, Manfred Arno Alfred, Concord, Ontario | Device for molding plastic pipes |
| DE29823984U1 (en) * | 1998-04-16 | 2000-03-23 | cpm compounding processing machinery GmbH, 49124 Georgsmarienhütte | Device for producing multilayer plastic pipes from polymer materials |
| DE20011667U1 (en) * | 2000-07-05 | 2000-09-21 | Lupke, Manfred Arno Alfred, Thornhill, Ontario | Device for forming pipes with multiple feeding of plastic |
-
2000
- 2000-05-08 CA CA002307785A patent/CA2307785A1/en not_active Abandoned
-
2001
- 2001-05-01 WO PCT/CA2001/000593 patent/WO2001085433A1/en active Application Filing
- 2001-05-01 AU AU2001254573A patent/AU2001254573A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019014746A1 (en) * | 2017-07-20 | 2019-01-24 | Lupke Manfred Arno Alfred | Coilable pipe with minimally angled corrugations |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2001254573A1 (en) | 2001-11-20 |
| WO2001085433A1 (en) | 2001-11-15 |
| WO2001085433B1 (en) | 2002-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |