DE2810003A1 - Verfahren zum verarbeiten von thermoplastischem kunststoffmaterial zu einem gegenstand mit den be- und verarbeitbarkeitseigenschaften von holz, und durch anwendung dieses verfahrens erhaltener gegenstand - Google Patents

Verfahren zum verarbeiten von thermoplastischem kunststoffmaterial zu einem gegenstand mit den be- und verarbeitbarkeitseigenschaften von holz, und durch anwendung dieses verfahrens erhaltener gegenstand

Info

Publication number
DE2810003A1
DE2810003A1 DE19782810003 DE2810003A DE2810003A1 DE 2810003 A1 DE2810003 A1 DE 2810003A1 DE 19782810003 DE19782810003 DE 19782810003 DE 2810003 A DE2810003 A DE 2810003A DE 2810003 A1 DE2810003 A1 DE 2810003A1
Authority
DE
Germany
Prior art keywords
extrusion device
plastic material
stencil
blowing agent
fed
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.)
Granted
Application number
DE19782810003
Other languages
German (de)
English (en)
Other versions
DE2810003C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Eduard Johan Gerard Klobbie
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.)
Lankhorst Touwfabrieken BV
Original Assignee
Lankhorst Touwfabrieken 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19828391&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE2810003(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Lankhorst Touwfabrieken BV filed Critical Lankhorst Touwfabrieken BV
Publication of DE2810003A1 publication Critical patent/DE2810003A1/de
Application granted granted Critical
Publication of DE2810003C2 publication Critical patent/DE2810003C2/de
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/06—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction
    • 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
    • B29C48/269—Extrusion in non-steady condition, e.g. start-up or shut-down
    • B29C48/2694—Intermittent extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C48/06—Rod-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
    • B29C48/09—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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/83—Injection molding of polyolefin-type foam
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/911—Recycling consumer used articles or products
    • Y10S264/921—Recycling consumer used articles or products by injection molding material recycled from consumer used article or product

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
DE19782810003 1977-04-19 1978-03-08 Verfahren zum verarbeiten von thermoplastischem kunststoffmaterial zu einem gegenstand mit den be- und verarbeitbarkeitseigenschaften von holz, und durch anwendung dieses verfahrens erhaltener gegenstand Granted DE2810003A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7704265A NL184773C (nl) 1977-04-19 1977-04-19 Werkwijze voor het verwerken van thermoplastisch kunststofmateriaal tot een voorwerp met de be- en verwerkbaarheidseigenschappen van hout.

Publications (2)

Publication Number Publication Date
DE2810003A1 true DE2810003A1 (de) 1978-10-26
DE2810003C2 DE2810003C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-05-13

Family

ID=19828391

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782810003 Granted DE2810003A1 (de) 1977-04-19 1978-03-08 Verfahren zum verarbeiten von thermoplastischem kunststoffmaterial zu einem gegenstand mit den be- und verarbeitbarkeitseigenschaften von holz, und durch anwendung dieses verfahrens erhaltener gegenstand

Country Status (5)

Country Link
US (1) US4187352A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS53129250A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2810003A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1603381A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL184773C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458385A1 (fr) * 1979-06-05 1981-01-02 Akerlund & Rausing Ab Produits moules par injection ou extrusion a partir de polyolefines et de materiaux cellulosiques
DE3544417A1 (de) * 1985-01-03 1986-08-28 VEB Kombinat Holzwerkstoffe, Beschläge und Maschinen Leipzig, DDR 7010 Leipzig Verfahren zur verarbeitung von unaufbereitetem plastischem altmaterial, vorzugsweise aus haushaltsaufkommen
DE3619144A1 (de) * 1986-06-06 1987-12-10 Uwe Heuschkel Verfahren und vorrichtung zum herstellen von formteilen aus thermoplastischem kunststoff, insbesondere ungereinigten und unsortierten kunststoffabfaellen
DE3916938A1 (de) * 1989-05-24 1990-11-29 Gerhard Dingler Bauelement
DE4105473C1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1990-12-28 1992-07-30 Suruga Seiki Co., Ltd., Shimizu, Shizuoka, Jp
DE4138978A1 (de) * 1991-11-27 1993-06-03 Berstorff Gmbh Masch Hermann Verfahren und vorrichtung zur verarbeitung von unsortiertem thermoplastischem kunststoffabfall
US5236653A (en) * 1990-09-25 1993-08-17 Real Gmbh Method for producing a columnar shaped piece
DE4213951A1 (de) * 1992-04-29 1993-11-04 Beyer Ind Prod Gmbh Verfahren zur herstellung von formteilen
DE4221353A1 (de) * 1992-06-29 1994-01-13 Real Gmbh Wiederaufbereitungsanlage für Kunststoffabfälle
DE4322784A1 (de) * 1993-07-08 1995-01-26 Ecoblock Kunststoff Recycling Formstück sowie Verfahren und Vorrichtung zu seiner Herstellung aus verschiedenen Fraktionen von Kunststoff-Abfallprodukten
EP0862977A3 (de) * 1993-07-08 1998-11-18 Kampffmeyer, Gerhard Formstück und Verfahren zur Herstellung des Formstücks
DE19816494A1 (de) * 1998-04-14 1999-10-21 M K F Uk Limited Newry Verfahren zur Herstellung von Wickelhülsen und Wickelhülse aus Kunststoff
DE4338199C2 (de) * 1993-07-08 2002-08-01 Gerhard Kampffmeyer Formstück und Verfahren zur Herstellung des Formstücks

Families Citing this family (84)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852287C3 (de) * 1978-12-02 1982-05-13 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Herstellung von Schaumstoffen aus Polyolefinen
US5229051A (en) * 1983-11-04 1993-07-20 Perma-Post International, Inc. Method for making sleeve encased concrete posts
US4626189A (en) * 1985-11-18 1986-12-02 Floyd V. Hammer Method and machine for forming articles from a plastic material
US4738808A (en) * 1985-11-18 1988-04-19 Hammer Floyd V Method of forming articles from a plastic material
US4797237A (en) * 1987-05-04 1989-01-10 Floyd V. Hammer Method for recycling a beverage container
BE1001164A5 (fr) * 1987-09-23 1989-08-01 Advanced Recycling Tech Installation de traitement et de transformation directe de dechets thermoplastiques en pieces moulees.
US5180531A (en) * 1988-07-29 1993-01-19 Vartkes Borzakian Method of forming plastic piling
US5051285A (en) * 1988-07-29 1991-09-24 Pillard Products, Inc. Plastic piling
US5100603A (en) * 1990-04-30 1992-03-31 Neefe Charles W Method of recycling multimaterial containers
WO1992003273A1 (en) * 1990-08-23 1992-03-05 Rema Industries & Services Pty. Ltd. A machine to form articles from thermoplastic plastics materials
DE4034213C1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1990-10-27 1991-08-22 Real Gmbh, 8717 Mainbernheim, De
US5075057A (en) * 1991-01-08 1991-12-24 Hoedl Herbert K Manufacture of molded composite products from scrap plastics
DE4115609C1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1991-05-14 1992-04-23 Real Gmbh, 8717 Mainbernheim, De
US5238633A (en) * 1991-05-24 1993-08-24 Duraplast Corporation Method and apparatus for recycling plastic waste into a thin profile, mechanically reinforced board
US5217655A (en) * 1991-07-09 1993-06-08 Envirotrust Technologies Inc. Methods for preparation of composite materials
US6004668A (en) * 1992-08-31 1999-12-21 Andersen Corporation Advanced polymer wood composite
CA2100320C (en) * 1992-08-31 2011-02-08 Michael J. Deaner Advanced polymer wood composite
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US5406768A (en) * 1992-09-01 1995-04-18 Andersen Corporation Advanced polymer and wood fiber composite structural component
NL9202139A (nl) * 1992-12-10 1994-07-01 Lankhorst Recycling Bv Werkwijze en inrichting voor het vervaardigen van langwerpige voorwerpen uit thermoplastisch kunststof materiaal, alsmede voorwerp vervaardigd met behulp van de werkwijze of inrichting.
US5441801A (en) * 1993-02-12 1995-08-15 Andersen Corporation Advanced polymer/wood composite pellet process
US5482216A (en) * 1993-04-21 1996-01-09 Alfa Loop Inc. Method for reclaiming plastic which contains undesirable contaminants
AU668470B2 (en) * 1993-07-12 1996-05-02 Seaward International, Inc. Elongated structural member and method and apparatus for making same
US5657967A (en) * 1994-04-21 1997-08-19 Patrick; Thomas D. Ecological confinement option
US5675956A (en) * 1994-04-25 1997-10-14 Nevin; Jerome F. Post and pole construction using composite materials
US5503788A (en) 1994-07-12 1996-04-02 Lazareck; Jack Automobile shredder residue-synthetic plastic material composite, and method for preparing the same
US7713460B2 (en) 1995-04-27 2010-05-11 Tech-Wood International Ltd. Method and apparatus for manufacturing of plastic-based composite product
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US5766711A (en) * 1996-08-29 1998-06-16 Barmakian; Andrew Composite camel structure and method for manufacture
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FR2458385A1 (fr) * 1979-06-05 1981-01-02 Akerlund & Rausing Ab Produits moules par injection ou extrusion a partir de polyolefines et de materiaux cellulosiques
DE3544417A1 (de) * 1985-01-03 1986-08-28 VEB Kombinat Holzwerkstoffe, Beschläge und Maschinen Leipzig, DDR 7010 Leipzig Verfahren zur verarbeitung von unaufbereitetem plastischem altmaterial, vorzugsweise aus haushaltsaufkommen
DE3619144A1 (de) * 1986-06-06 1987-12-10 Uwe Heuschkel Verfahren und vorrichtung zum herstellen von formteilen aus thermoplastischem kunststoff, insbesondere ungereinigten und unsortierten kunststoffabfaellen
DE3916938A1 (de) * 1989-05-24 1990-11-29 Gerhard Dingler Bauelement
US5236653A (en) * 1990-09-25 1993-08-17 Real Gmbh Method for producing a columnar shaped piece
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DE4138978A1 (de) * 1991-11-27 1993-06-03 Berstorff Gmbh Masch Hermann Verfahren und vorrichtung zur verarbeitung von unsortiertem thermoplastischem kunststoffabfall
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DE4221353A1 (de) * 1992-06-29 1994-01-13 Real Gmbh Wiederaufbereitungsanlage für Kunststoffabfälle
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EP0862977A3 (de) * 1993-07-08 1998-11-18 Kampffmeyer, Gerhard Formstück und Verfahren zur Herstellung des Formstücks
DE4338199C2 (de) * 1993-07-08 2002-08-01 Gerhard Kampffmeyer Formstück und Verfahren zur Herstellung des Formstücks
DE19816494A1 (de) * 1998-04-14 1999-10-21 M K F Uk Limited Newry Verfahren zur Herstellung von Wickelhülsen und Wickelhülse aus Kunststoff
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JPS53129250A (en) 1978-11-11
NL184773B (nl) 1989-06-01
NL184773C (nl) 1989-11-01
GB1603381A (en) 1981-11-25
NL7704265A (nl) 1978-10-23
DE2810003C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-05-13
US4187352A (en) 1980-02-05

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