IN148290B - - Google Patents
Info
- Publication number
- IN148290B IN148290B IN1011/CAL/77A IN1011CA1977A IN148290B IN 148290 B IN148290 B IN 148290B IN 1011CA1977 A IN1011CA1977 A IN 1011CA1977A IN 148290 B IN148290 B IN 148290B
- Authority
- IN
- India
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
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
- B26F1/0053—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes by machining, e.g. cutting, grinding, projections on the tube wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
- B26F1/0061—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes whereby the tube moves axially or radially
- B26F1/0069—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes whereby the tube moves axially or radially and the tool travels with the tube
-
- 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
- B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/22—Corrugating
- B29C53/30—Corrugating of tubes
-
- 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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
-
- 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
-
- 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
- B29C2793/0045—Perforating
-
- 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
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- 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
- B29C49/0029—Making articles of indefinite length, e.g. corrugated tubes wherein the process is characterised by the pressure used, e.g. using varying pressure depending on sequence of cavity shapes
-
- 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
- B29C49/003—Making articles of indefinite length, e.g. corrugated tubes wherein the process is characterised by temperature conditioning, e.g. using inside cooling by air
-
- 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
- B29C49/006—Blow-moulding plants, e.g. using several blow-moulding apparatuses cooperating
-
- 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)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2637995A DE2637995C2 (de) | 1976-08-24 | 1976-08-24 | Verfahren zur Herstellung von doppelwandigen Kunststoffrohren mit einer ringförmig gewellten Außenwand und einer glatten Innenwand |
Publications (1)
Publication Number | Publication Date |
---|---|
IN148290B true IN148290B (xx) | 1981-01-03 |
Family
ID=5986188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IN1011/CAL/77A IN148290B (xx) | 1976-08-24 | 1977-07-05 |
Country Status (28)
Country | Link |
---|---|
US (2) | US4145387A (xx) |
JP (1) | JPS6028656B2 (xx) |
AT (1) | AT366315B (xx) |
AU (1) | AU506193B2 (xx) |
BE (1) | BE858036A (xx) |
BR (1) | BR7705605A (xx) |
CA (1) | CA1061726A (xx) |
CH (1) | CH622984A5 (xx) |
CS (1) | CS196373B2 (xx) |
DD (1) | DD132728A5 (xx) |
DE (1) | DE2637995C2 (xx) |
DK (1) | DK375477A (xx) |
ES (1) | ES460822A1 (xx) |
FI (1) | FI64074C (xx) |
FR (1) | FR2362715A1 (xx) |
GB (1) | GB1525450A (xx) |
GR (1) | GR63991B (xx) |
HU (1) | HU175927B (xx) |
IN (1) | IN148290B (xx) |
IT (1) | IT1117833B (xx) |
NL (1) | NL7707369A (xx) |
NO (1) | NO772572L (xx) |
NZ (1) | NZ184598A (xx) |
PL (1) | PL110500B1 (xx) |
SE (1) | SE422760B (xx) |
SU (1) | SU708992A3 (xx) |
TR (1) | TR19812A (xx) |
YU (1) | YU201477A (xx) |
Families Citing this family (62)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2840174A1 (de) | 1978-09-15 | 1980-03-20 | Oltmanns Ziegelwerk | Leitungsrohr aus kunststoff |
IL55798A0 (en) * | 1978-10-25 | 1978-12-17 | Drori Mordeki | Fluid distribution devices particularly useful for drip irrigation and mathod and apparatus for making same |
US4523613A (en) * | 1980-07-01 | 1985-06-18 | Hancor, Inc. | Multi-layered corrugated conduit with "black-eye" like apertures |
JPS5844583U (ja) * | 1981-09-18 | 1983-03-25 | 金尾 史朗 | 合成樹脂製コルゲ−ト二重管 |
US4500284A (en) * | 1983-09-16 | 1985-02-19 | Lupke Manfred Arno Alfred | Forming single wall bells in double wall pipe |
JPS60136689A (ja) * | 1983-12-24 | 1985-07-20 | 鳥居化成株式会社 | 多重管の製造装置 |
US4846660A (en) * | 1984-07-18 | 1989-07-11 | Contech Construction Products Inc. | Apparatus for producing double wall pipe |
US5124109A (en) * | 1984-07-18 | 1992-06-23 | Contech Construction Products Inc. | Method for producing a double wall pipe |
JPS6199788A (ja) * | 1984-10-22 | 1986-05-17 | 金尾 史朗 | 地中埋設用耐圧螺旋管 |
JPS61293821A (ja) * | 1985-06-21 | 1986-12-24 | Takiron Co Ltd | コルゲ−ト管のスリ−ブの成形方法 |
NL8502327A (nl) * | 1985-08-23 | 1987-03-16 | Wavin Bv | Kunststofbuis bestaande uit een buitenhuis met ribbels en gladde binnenwand, alsmede werkwijze voor het herstellen resp. verbeteren van een rioleringsbuis. |
US5060696A (en) * | 1985-08-23 | 1991-10-29 | Wavin, Bv | Plastic pipe comprising an outer corrugated pipe and a smooth inner wall |
JPS61215883A (ja) * | 1985-10-17 | 1986-09-25 | 金尾 史朗 | 合成樹脂製コルゲ−ト二重管 |
DE3603481A1 (de) * | 1986-02-05 | 1987-08-06 | Wilhelm Hegler | Kunststoff-wellrohr mit angeformter steck-muffe |
US4759389A (en) * | 1986-12-04 | 1988-07-26 | Kim Woo Suck | Synthetic resin pipe for underground installation |
JPS63115685U (xx) * | 1987-01-21 | 1988-07-26 | ||
US4824502A (en) * | 1987-03-06 | 1989-04-25 | Uc Industry Co., Ltd. | Method and apparatus for manufacturing a plastic pipe |
DE3744510A1 (de) * | 1987-12-30 | 1989-07-13 | Wilhelm Hegler | Rohrverbindungs-element |
JPH02179213A (ja) * | 1988-12-27 | 1990-07-12 | Shiro Kanao | 耐圧螺旋波形管 |
DE3906752C2 (de) * | 1989-03-03 | 1997-09-04 | Pipelife Rohrsysteme Gmbh | Leitungsrohr aus Kunststoff, insbesondere für Abwässer |
ATE113356T1 (de) * | 1989-03-03 | 1994-11-15 | Pipelife Rohrsysteme Gmbh | Verfahren zur herstellung eines abwasserrohrs aus kunststoff. |
DE3939052C2 (de) * | 1989-11-25 | 2003-11-06 | Pipelife Rohrsysteme Gmbh | Verfahren zur Herstellung eines über Muffenverbindungen mit einem gleichen oder einem anderen Rohr verbindbaren Leitungsrohres aus Kunststoff |
DE3924791A1 (de) * | 1989-07-27 | 1991-01-31 | Rainer Isolierrohr Drossbach | Doppelwandrohr u. verfahren zu seiner herstellung |
JP3219407B2 (ja) | 1990-11-26 | 2001-10-15 | エクセル株式会社 | 多層プラスチック管及びその製造方法 |
GB9118970D0 (en) * | 1991-08-30 | 1991-10-23 | B & H Leicester Ltd | Tubular members and their manufacture |
DE4210482A1 (de) * | 1992-03-31 | 1993-10-07 | Wilhelm Hegler | Verfahren und Vorrichtung zur fortlaufenden Herstellung eines Verbundrohres mit Rohr-Muffe |
US5401459A (en) * | 1992-10-05 | 1995-03-28 | Infiltrator Systems, Inc. | Gas-assisted injection molding of hollow ribbed article |
US5489201A (en) * | 1993-04-15 | 1996-02-06 | Cullom Machine Tool & Die, Inc. | Plastic tile corrugator and mold blocks |
US5525289A (en) * | 1995-01-30 | 1996-06-11 | Lupke; Manfred A. A. | Method and apparatus for cooling hollow molded product |
WO1996031723A1 (en) * | 1995-04-03 | 1996-10-10 | Uponor B.V. | Method for manufacturing a corrugated pipe, and a corrugated pipe manufactured by the method |
GB2300683B (en) * | 1995-05-06 | 1999-10-20 | Uponor Ltd | Improvements in or relating to flexible pipes |
US6461078B1 (en) * | 1995-09-11 | 2002-10-08 | David W. Presby | Plastic sewage pipe |
US5720575A (en) * | 1995-11-20 | 1998-02-24 | Henrie; James O. | Water control and diversion headgate and method of manufacture |
US5888024A (en) * | 1997-04-04 | 1999-03-30 | Big "O" Inc. | Marine dock and flotation tank |
US6206050B1 (en) * | 1999-03-31 | 2001-03-27 | Certainteed Corporation | Hose used to install loose fill insulation |
US6648022B2 (en) | 2001-09-21 | 2003-11-18 | Certainteed Corporation | Loose-fill insulation dispensing apparatus including spiked conduit liner |
WO2003055664A1 (en) * | 2001-12-21 | 2003-07-10 | Rubbermaid Incorporated | Apparatus and method for forming discrete hollow parts |
AU2002347114A1 (en) | 2001-12-21 | 2003-07-09 | Geberit Technik Ag | Plastic pipe, piping comprising a pipe and a method for producing a pipe |
JP2003211522A (ja) * | 2002-01-23 | 2003-07-29 | Denki Kagaku Kogyo Kk | ニ重壁コルゲート管の製造方法 |
JP3878026B2 (ja) * | 2002-02-14 | 2007-02-07 | 電気化学工業株式会社 | ニ重壁コルゲート管の製造方法 |
US6817632B1 (en) | 2002-09-13 | 2004-11-16 | Fleetguard, Inc. | Flex tube joint with torsion relief |
DE20306407U1 (de) * | 2003-04-24 | 2004-08-26 | Drossbach Gmbh & Co Kg | Doppelwand-Wellrohr |
JP4120476B2 (ja) * | 2003-05-27 | 2008-07-16 | 宇部興産株式会社 | コルゲートチューブ |
US8733405B2 (en) * | 2005-03-14 | 2014-05-27 | Advanced Drainage Systems, Inc. | Corrugated pipe with outer layer |
DE202005007835U1 (de) * | 2005-05-19 | 2005-07-21 | Zehnder Verkaufs- Und Verwaltungs-Ag | Rohr |
US7284573B2 (en) | 2005-05-24 | 2007-10-23 | Certainteed Corporation | Hose for installing loose fill insulation |
US7156128B1 (en) * | 2005-06-21 | 2007-01-02 | Kanaflex Corporation | Synthetic resin pipe |
EP1867460A3 (en) * | 2006-06-16 | 2009-04-08 | Wavin B.V. | Corrugated plastic pipe production |
DE102006048512B4 (de) * | 2006-10-13 | 2014-03-06 | Ralph Peter Hegler | Vorrichtung zur Herstellung von Verbund-Rohren |
DE102007049653A1 (de) * | 2007-10-12 | 2009-04-16 | Unicor Gmbh | Vorrichtung zum Herstellen von thermoplastischen Wellrohren |
DE102008007226A1 (de) * | 2008-02-01 | 2009-08-06 | Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg | Verbundrohr mit schraubenförmiger Wellung und dessen Verwendung als Abwasserrohr oder Erdkollektor |
US8550807B2 (en) * | 2008-05-28 | 2013-10-08 | Advanced Drainage Systems, Inc. | In-mold punch apparatus and methods |
DE102008027102B4 (de) * | 2008-06-06 | 2011-11-17 | Unicor Gmbh | Doppelwand-Wellrohr und Formbacken für eine Vorrichtung zur Herstellung eines derartigen Doppelwand-Wellrohres |
US20110011613A1 (en) * | 2009-07-20 | 2011-01-20 | Wpfy, Inc. | Treated electrical conduit |
CA2799511C (en) | 2010-05-17 | 2017-11-14 | Presby Patent Trust | Apparatus and method for processing liquid waste |
DE102011015388A1 (de) | 2011-03-29 | 2012-10-04 | Norma Germany Gmbh | Richtungsgebundene Fluidleitung |
CA2850028A1 (en) | 2011-10-14 | 2013-04-18 | Presby Patent Trust | Liquid waste treatment apparatus |
CA2900578C (en) * | 2013-08-12 | 2017-11-07 | Prinsco, Inc. | Coilable dual wall corrugated pipe and related method |
CN104315327A (zh) * | 2014-08-26 | 2015-01-28 | 卢满松 | 具有弹簧的双壁波纹管 |
CN104315267A (zh) * | 2014-08-26 | 2015-01-28 | 张琪 | 具有气孔的双壁波纹管 |
CN108091433B (zh) * | 2017-12-12 | 2021-05-25 | 杭州电缆股份有限公司 | 高压皱纹金属套低偏心率聚乙烯外护套电力电缆的加工方法 |
CN114801106B (zh) * | 2022-04-27 | 2024-05-17 | 大连天薇管业有限公司 | 一种双壁波纹管生产设备及生产方法 |
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US3843758A (en) * | 1972-07-13 | 1974-10-22 | Plastic Tubing | Method for making and slitting plastic corrugated tubes |
US3994646A (en) * | 1974-01-25 | 1976-11-30 | Frankische Isolierrohr-Und Metallwaren Werke Gebr. Kirchner | Apparatus for producing double-walled tubes of plastic material |
FR70398E (fr) * | 1974-03-22 | 1959-04-06 | Electronique & Physique | Perfectionnements aux dispositifs de prise de vues de télévision et cinématographie |
FR69963E (fr) * | 1974-03-22 | 1959-01-30 | Onera (Off Nat Aerospatiale) | Appareil pour le dépouillement d'enregistrements |
DE2413877C3 (de) * | 1974-03-22 | 1979-02-01 | Hegler, Wilhelm, 8730 Bad Kissingen | Extrusionskopf zum kontinuierlichen Ummanteln eines Rohres oder Kabels |
US4037626A (en) * | 1975-09-15 | 1977-07-26 | Standard Oil Company (Indiana) | High strength composite pipe structure having leakproof joints |
US4010298A (en) * | 1975-12-03 | 1977-03-01 | Angle William M | Underground irrigation devices and methods of making and using the same |
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1976
- 1976-08-24 DE DE2637995A patent/DE2637995C2/de not_active Expired
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1977
- 1977-06-24 GR GR53791A patent/GR63991B/el unknown
- 1977-06-29 AT AT0463977A patent/AT366315B/de not_active IP Right Cessation
- 1977-07-04 NL NL7707369A patent/NL7707369A/xx not_active Application Discontinuation
- 1977-07-04 CS CS774429A patent/CS196373B2/cs unknown
- 1977-07-05 IN IN1011/CAL/77A patent/IN148290B/en unknown
- 1977-07-11 NZ NZ184598A patent/NZ184598A/xx unknown
- 1977-07-14 GB GB29649/77A patent/GB1525450A/en not_active Expired
- 1977-07-14 CH CH872777A patent/CH622984A5/de not_active IP Right Cessation
- 1977-07-16 ES ES460822A patent/ES460822A1/es not_active Expired
- 1977-07-19 NO NO772572A patent/NO772572L/no unknown
- 1977-07-25 AU AU27269/77A patent/AU506193B2/en not_active Expired
- 1977-08-01 FI FI772332A patent/FI64074C/fi not_active IP Right Cessation
- 1977-08-02 IT IT83627/77A patent/IT1117833B/it active
- 1977-08-10 SU SU772512604A patent/SU708992A3/ru active
- 1977-08-11 US US05/823,778 patent/US4145387A/en not_active Expired - Lifetime
- 1977-08-16 CA CA284,771A patent/CA1061726A/en not_active Expired
- 1977-08-18 TR TR19812A patent/TR19812A/xx unknown
- 1977-08-22 YU YU02014/77A patent/YU201477A/xx unknown
- 1977-08-22 PL PL1977200414A patent/PL110500B1/pl unknown
- 1977-08-22 DD DD7700200676A patent/DD132728A5/xx unknown
- 1977-08-22 SE SE7709427A patent/SE422760B/xx not_active IP Right Cessation
- 1977-08-22 HU HU77HE751A patent/HU175927B/hu unknown
- 1977-08-23 JP JP52101013A patent/JPS6028656B2/ja not_active Expired
- 1977-08-23 BR BR7705605A patent/BR7705605A/pt unknown
- 1977-08-23 BE BE180373A patent/BE858036A/xx not_active IP Right Cessation
- 1977-08-24 DK DK375477A patent/DK375477A/da not_active Application Discontinuation
- 1977-08-24 FR FR7725872A patent/FR2362715A1/fr active Granted
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1980
- 1980-06-02 US US06/155,899 patent/US4303104A/en not_active Expired - Lifetime