IT1064045B - Sci e relativo metodo di fabbricazione - Google Patents

Sci e relativo metodo di fabbricazione

Info

Publication number
IT1064045B
IT1064045B IT29367/76A IT2936776A IT1064045B IT 1064045 B IT1064045 B IT 1064045B IT 29367/76 A IT29367/76 A IT 29367/76A IT 2936776 A IT2936776 A IT 2936776A IT 1064045 B IT1064045 B IT 1064045B
Authority
IT
Italy
Prior art keywords
ski
manufacture
related method
Prior art date
Application number
IT29367/76A
Other languages
English (en)
Original Assignee
Exxon Research Engineering Co
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 Exxon Research Engineering Co filed Critical Exxon Research Engineering Co
Application granted granted Critical
Publication of IT1064045B publication Critical patent/IT1064045B/it

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00Skis or snowboards
    • A63C5/12Making thereof; Selection of particular materials
    • A63C5/122Selection of particular materials for damping purposes, e.g. rubber or the like
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63CSKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00Skis or snowboards
    • A63C5/12Making thereof; Selection of particular materials
    • A63C5/126Structure of the core
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/02Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
    • B29C70/021Combinations of fibrous reinforcement and non-fibrous material
    • B29C70/025Combinations of fibrous reinforcement and non-fibrous material with particular filler
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • B29C70/865Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022Non-woven fabric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2063/00Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085Copolymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0809Fabrics
    • B29K2105/0845Woven fabrics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16Fillers
    • B29K2105/165Hollow fillers, e.g. microballoons or expanded particles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2309/00Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08Glass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2709/00Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
    • B29K2709/08Glass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/52Sports equipment ; Games; Articles for amusement; Toys
    • B29L2031/5263Skis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00Polyalkenes
    • B32B2323/04Polyethylene
    • B32B2323/043HDPE, i.e. high density polyethylene

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polymerisation Methods In General (AREA)
  • Moulding By Coating Moulds (AREA)
  • Graft Or Block Polymers (AREA)
IT29367/76A 1976-01-26 1976-11-15 Sci e relativo metodo di fabbricazione IT1064045B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/652,331 US4065150A (en) 1976-01-26 1976-01-26 Ski and method of making same

Publications (1)

Publication Number Publication Date
IT1064045B true IT1064045B (it) 1985-02-18

Family

ID=24616448

Family Applications (1)

Application Number Title Priority Date Filing Date
IT29367/76A IT1064045B (it) 1976-01-26 1976-11-15 Sci e relativo metodo di fabbricazione

Country Status (12)

Country Link
US (1) US4065150A (it)
JP (1) JPS5292633A (it)
BE (1) BE850713A (it)
DE (1) DE2647586A1 (it)
DK (1) DK6577A (it)
FI (1) FI763173A (it)
FR (1) FR2338721A1 (it)
GB (1) GB1561435A (it)
IT (1) IT1064045B (it)
NL (1) NL7612670A (it)
NO (1) NO763890L (it)
SE (1) SE7612747L (it)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437225A1 (fr) * 1978-09-28 1980-04-25 Bekaert Sa Nv Ski perfectionne
JPS5567767U (it) * 1978-11-04 1980-05-09
JPS5567768U (it) * 1978-11-04 1980-05-09
US4222808A (en) * 1979-02-07 1980-09-16 Olin Corporation Ski manufacturing process
FR2546764B1 (fr) * 1983-06-02 1986-10-03 Desoutter Michel Ski court et large, a profil particulier, muni d'une plaque de retenue amovible
US5230844A (en) * 1987-09-04 1993-07-27 Skis Rossignol, S.A. Process for producing a complex elastic molded structure of the sandwich type
US5141243A (en) * 1990-01-22 1992-08-25 Pacific Coast Composites, Inc. Alpine ski with a simplified construction
AT404900B (de) * 1990-05-11 1999-03-25 Atomic Austria Gmbh Verstärkungseinlage für einen ski, insbesondere alpinski
US5413661A (en) * 1992-05-13 1995-05-09 R+S Stanztechnik Gmbh Method for producing a laminated structural component with a hard foam reinforcement
US5800749A (en) * 1994-01-14 1998-09-01 Compsys, Inc. Method of making composite structures
US6013213A (en) * 1994-01-14 2000-01-11 Compsys, Inc. Method for making deformable composite structures and assembling composite article
US6004492A (en) * 1994-01-14 1999-12-21 Compsys, Inc. Method of making composite spring and damper units
US5908591A (en) * 1994-01-14 1999-06-01 Compsys, Inc. Method for making composite structures
US5664518A (en) * 1994-01-14 1997-09-09 Compsys, Inc. Composite structures and method of making composite structures
US5897818A (en) * 1994-01-14 1999-04-27 Compsys, Inc. Method for continuously manufacturing a composite preform
US5759664A (en) * 1996-02-29 1998-06-02 Goode Ski Technologies Composite ski
US6058979A (en) * 1997-07-23 2000-05-09 Cuming Corporation Subsea pipeline insulation
DE19758546C2 (de) 1997-07-30 2003-11-27 Adidas Int Marketing Bv Fußball
GB9916045D0 (en) * 1999-07-09 1999-09-08 Kirby John K Laminar mats and a method of production thereof
DE19944498A1 (de) * 1999-09-16 2001-03-22 Wacker Chemie Gmbh Beschichtetes Brett
GB2363354B (en) * 2000-06-15 2004-08-11 British Mica Co Holdings Ltd Decorative glass fibre reinforced low-smoke fire retardant mouldings
US6827110B2 (en) 2002-01-07 2004-12-07 Cuming Corporation Subsea insulated pipeline with pre-cured syntactic elements and methods of manufacture
EP1507469B1 (en) 2002-05-24 2010-07-07 Tempur World, LLC Comfort pillow
US7530127B2 (en) 2002-05-24 2009-05-12 Dan-Foam Aps Pillow and method of manufacturing a pillow
FR2845611B1 (fr) * 2002-10-15 2004-12-03 Rossignol Sa Planche de glisse sur neige a spatule et a releve de talon ameliores
DE10255092B4 (de) * 2002-11-26 2010-11-11 Molten Corp. Verfahren zur Herstellung von Teilstücken eines Balls
GB0402221D0 (en) 2004-02-02 2004-03-03 L & L Products Inc Improvements in or relating to composite materials
DE102004045176B4 (de) 2004-09-17 2011-07-21 Adidas International Marketing B.V. Blase
US7469437B2 (en) * 2005-06-24 2008-12-30 Tempur-Pedic Management, Inc. Reticulated material body support and method
US8656537B2 (en) 2006-04-20 2014-02-25 Dan Foam Aps Multi-component pillow and method of manufacturing and assembling same
DE102013202485B4 (de) 2013-02-15 2022-12-29 Adidas Ag Ball für eine Ballsportart
US9849361B2 (en) 2014-05-14 2017-12-26 Adidas Ag Sports ball athletic activity monitoring methods and systems
US10523053B2 (en) 2014-05-23 2019-12-31 Adidas Ag Sport ball inductive charging methods and systems
DE202019107090U1 (de) * 2019-12-18 2021-03-19 Blizzard Sport Gmbh Gleitbrett, insbesondere Ski

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2184791A (en) * 1936-07-31 1939-12-26 Airmobile Aircraft Company Ski and method of making the same
US2213903A (en) * 1938-08-04 1940-09-03 Davidson Hamish Mcleod Reinforced laminated ski
US2428325A (en) * 1942-10-30 1947-09-30 Owens Corning Fiberglass Corp Reinforced plywood
US2470227A (en) * 1947-09-15 1949-05-17 Carl L Wheeler Ski
CH273982A (de) * 1948-08-17 1951-03-15 Tribelhorn Emil Aus mehreren Schichten zusammengesetzter Ski und Verfahren zur Herstellung desselben.
US2695178A (en) * 1950-06-15 1954-11-23 Jr George B Rheinfrank Laminated ski and method of making same
FR1092526A (fr) * 1953-10-28 1955-04-22 Manuf De Confection Berthiot M Procédé de fabrication des skis
US2920898A (en) * 1956-06-19 1960-01-12 Richard T Metcalfe Ski having a foamed plastic body portion
FR1241437A (fr) * 1958-11-20 1960-09-16 Ski
US3210230A (en) * 1961-11-21 1965-10-05 Polystructures Inc Process for forming a laminated plastic structure
CH394004A (de) * 1962-04-18 1965-06-15 Wey Alfred Kunststoff-Ski
US3201138A (en) * 1962-09-10 1965-08-17 Jr Culver S Brown Laminated ski with a honeycomb core
US3276784A (en) * 1965-05-12 1966-10-04 Jr Henry M Anderson Laminated ski having a foam filled honeycomb core
FR1446268A (fr) * 1965-09-06 1966-07-15 Procédé pour la fabrication de skis ainsi que les skis conformes à ceux obtenus par le présent procédé ou procédé similaire
FR1544941A (fr) * 1967-11-14 1968-11-08 B Schmalkalder Mobel Und Winte Procédé de fabrication d'articles de sport en bois, notamment de skis et de crosses de hockey sur glace
GB1224177A (en) * 1967-12-20 1971-03-03 Carlton Sports Company Ltd Improvements in or relating to skis
CH508403A (de) * 1969-05-19 1971-06-15 Skalla Gerald Kunststoffkern für Schier
US3635483A (en) * 1969-09-02 1972-01-18 Larson Ind Inc Encapsulated plastic snow ski
US3904813A (en) * 1974-03-18 1975-09-09 Minnesota Mining & Mfg Adhesive for metal-clad sheeting

Also Published As

Publication number Publication date
JPS5292633A (en) 1977-08-04
US4065150A (en) 1977-12-27
BE850713A (fr) 1977-07-25
NL7612670A (nl) 1977-07-28
FI763173A (it) 1977-07-27
DE2647586A1 (de) 1977-07-28
NO763890L (no) 1977-07-27
FR2338721A1 (fr) 1977-08-19
SE7612747L (sv) 1977-07-27
GB1561435A (en) 1980-02-20
DK6577A (da) 1977-07-27

Similar Documents

Publication Publication Date Title
IT1064045B (it) Sci e relativo metodo di fabbricazione
TR20081A (tr) Mayilerin dtomizasyonu
DK102177A (da) Aminoalkyl-heterocycliske forbindelser og fremgangsmade til fremstilling deraf
PL215006A1 (pl) Sposob wytwarzania 4-chlorowcodwuhydropiranow
PL199298A1 (pl) Sposob wytwarzania 2-bromo-6-fluoro-n-2-imidazolidynylideno-benzaminy
DK96177A (da) 4-androsten-3-oner og fremgangsmade til fremstilling heraf
PL200437A1 (pl) Srodek owadobojczy i sposob wytwarzania podstawionych eterow benzoiloureidodwufenylowych
IT1086271B (it) Determinazione di barbiturici
NL7705701A (nl) Omega-nor-aromatische-13.14-dehydroprostaglan- dinen en werkwijzen ter bereiding ervan.
SE398297B (sv) Skidbindning av taledstyp
PL199633A1 (pl) Sposob wytwarzania 5-m-toliloksyuracylu
PL202091A1 (pl) Sposob wytwarzania gamma-pyronow
IT1087511B (it) B-galattosidasi e relativi metodi di preparazione e di impiego
DK157752C (da) Fremgangsmaade og fremstilling af thiocarbohydrazi d
DK550377A (da) 1-aziridin-carboxylsyreesterderivater og fremgangsmaade til fremstilling deraf
DK105077A (da) Forgrenede blokcopolymerisater og fremgangsmade til fremstilling deraf
PL190443A1 (pl) Sposob otrzymywania p-nitrodwufenyloaminy
DK211977A (da) Pyrrolioner samt fremgangsmade til fremstilling deraf
IT1081020B (it) Metodo di fabbricazione di aspidospermidine
PL202697A1 (pl) Sposob wytwarzania 2-bromo-alfa-ergokryptyny
PL197817A1 (pl) Srodek owadobojczy i roztoczobojczy oraz sposob wytwarzania dwufosforylopirymidyn
IT1038442B (it) Sci nautico e procedimento per la sua fabbricazione
PL192043A1 (pl) Sposob wytwarzania polinitrozwiazkow
PL96646B1 (pl) Sposob wytwarzania alkilo-beta-dl-rybopiranozydow
NL7706252A (nl) Punaise en werkwijze ter vervaardiging daarvan.