EP0890375A1 - Mehrschichtiges Schwimmflossenblatt aus faserverstärktem Kunstharz - Google Patents

Mehrschichtiges Schwimmflossenblatt aus faserverstärktem Kunstharz Download PDF

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Publication number
EP0890375A1
EP0890375A1 EP98112531A EP98112531A EP0890375A1 EP 0890375 A1 EP0890375 A1 EP 0890375A1 EP 98112531 A EP98112531 A EP 98112531A EP 98112531 A EP98112531 A EP 98112531A EP 0890375 A1 EP0890375 A1 EP 0890375A1
Authority
EP
European Patent Office
Prior art keywords
blade
sheets
reinforced resin
panel
composite fibre
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.)
Withdrawn
Application number
EP98112531A
Other languages
English (en)
French (fr)
Inventor
Giovanni Garofalo
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.)
HTM Sport SpA
Original Assignee
HTM Sport SpA
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 HTM Sport SpA filed Critical HTM Sport SpA
Publication of EP0890375A1 publication Critical patent/EP0890375A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B31/00—Swimming aids
    • A63B31/08—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs
    • A63B31/10—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet
    • A63B31/11—Swim fins, flippers or other swimming aids held by, or attachable to, the hands, arms, feet or legs held by, or attachable to, the hands or feet attachable only to the feet

Definitions

  • the present invention relates to swimming fin blades, and in particular to swimming fin blades of the type described for example in French patent No. 2,332,038.
  • the said blades are predominantly, although not exclusively, used in the manufacture of fins on account of the many advantages they offer in terms of lightness, propulsion and mechanical strength compared with more commercial fins.
  • the fins in which these blades are used essentially consist of a blade and a shaped shoe portion connected together mechanically by fitting the rear end of the blade into suitable housings in the sole of the shoe portion and fixing these two parts together by means of a screw coupling.
  • the blade can be made using various materials which have to be very hard, mechanically strong, resistant to corrosion and lightweight; that is why panels of glass fibre or carbon fibre bonded with a matrix of thermosetting resin (for example epoxy resin) are used for these blades.
  • the shoe portion is usually made of rubber or elastomeric material.
  • a first object of the present invention is therefore to produce a composite blade for swimming fins which is designed to be decorated in a simple but abrasion-resistant manner.
  • a second object of the present invention is therefore also to produce longitudinal channels in the blade in order to increase its flexibility.
  • the first object is achieved by means of a blade consisting of a panel made of glass fibre or carbon fibre bonded with a matrix of thermosetting resin, which panel is covered on both sides with sheets of thermoplastic material.
  • these sheets can be decorated using silk-screen printing or flexography techniques.
  • One of the properties of thermoplastic materials is that they are transparent, which means that they can be decorated on the side that will be applied directly to the panel, so that the decorative motifs will be visible yet still protected from abrasion.
  • this method also enables the structure of the panel sandwiched between the sheets to show through. If the decorative motifs cover the whole surface of the abovementioned sheets, it is possible to make transparent windows in the latter in order to show the underlying panel.
  • An additional feature is that the abovementioned sheets have good mechanical properties and are resistant to abrasion.
  • the second object is achieved by cutting grooves into the section of blade, these grooves being produced by removing portions of a given width and length from the panel in a direction longitudinal to the said panel, starting from the front end of the section of blade.
  • the flexibility of the blade is ensured by the fact that, in those panel portions comprising the grooves, the sheets of thermoplastic material are bonded together by means of hot press moulding so as to form longitudinal channels in which the water can flow more easily.
  • those portions of the two sheets that lie within the grooves can be given a semicircular channel shape, for example by means of thermoforming using suitable mould cavities.
  • the composite fibre-reinforced resin blade according to the present invention comprises a panel 1 made of glass fibre or carbon fibre bonded with a matrix of thermosetting resins (such as, for example, epoxy resins), which give the blade improved mechanical characteristics and make it abrasion- resistant.
  • Two sheets of thermoplastic material 2 are applied to this panel - which constitutes the inner part of the blade forming the subject of the present invention - one on the bottom surface of the panel and one on the top surface.
  • the sheets 2 are applied to the panel using any process suitable for the purpose, for example by means of hot press moulding, and decorative motifs 3 can then be printed on the sheets using silk-screen printing or flexography techniques.
  • the decorative motifs 3 can be printed either on the external side or on the internal side of these sheets. If the decorative motifs are printed on the internal side of the sheets, they will be protected from abrasion. Moreover, in cases where the abovementioned decorative motifs cover the entire surface of the thermoplastic sheet, it is possible to leave part of the latter undecorated, forming a transparent window 4 - which is shown in Figure 1 as having an ellipsoidal section - so as to allow the internal panel to show through. As shown on the left-hand side of Figure 1, a groove 5 which extends inwards from the front end of the blade over a given length and width has been cut into the panel 1.
  • the abovementioned groove 5 is covered with the sheets of thermoplastic material 2 which are bonded together, as denoted by the reference 202 in Figure 3, by means of hot press moulding.
  • the parts 202 can be given a semicircular channel shape 202' in the region of the groove, for example by means of presses fitted with suitable mould cavities, as illustrated in Figure 4.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP98112531A 1997-07-11 1998-07-07 Mehrschichtiges Schwimmflossenblatt aus faserverstärktem Kunstharz Withdrawn EP0890375A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITGE970060 1997-07-11
IT97GE000060A IT1293218B1 (it) 1997-07-11 1997-07-11 Pala composita in fibro-resina rivestita su entrambi i lati di fogli di materiale termoplastico per pinne per nuoto.

Publications (1)

Publication Number Publication Date
EP0890375A1 true EP0890375A1 (de) 1999-01-13

Family

ID=11355053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98112531A Withdrawn EP0890375A1 (de) 1997-07-11 1998-07-07 Mehrschichtiges Schwimmflossenblatt aus faserverstärktem Kunstharz

Country Status (2)

Country Link
EP (1) EP0890375A1 (de)
IT (1) IT1293218B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100272970A1 (en) * 2009-04-28 2010-10-28 Hon Hai Precision Industry Co., Ltd. Fiber material component with 3d surface and method of manufacturing the same
US8641464B2 (en) 2010-04-08 2014-02-04 Cetatek Holdings Inc. Flippers, boots, systems including same, and methods of using same
CN103990255A (zh) * 2013-02-18 2014-08-20 刘祖学 多用泳具
US9440114B2 (en) 2012-10-12 2016-09-13 Cetatek Holdings Inc. Boot sole system and fin for same
WO2019053751A1 (en) * 2017-09-13 2019-03-21 Alemanni Sub Di Alemanni Itio E C. S.A.S. PALM FOR SWIMMING UNDER WATER
US10675508B2 (en) 2010-04-08 2020-06-09 Cetatek Holdings Inc. Coupleable fin apparatuses and boot toe bodies

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329307A1 (fr) * 1975-10-28 1977-05-27 Cavalero Rene Dispositif constructif fonctionnel de palme de natation a longue voilure incorporee
EP0160261A2 (de) * 1984-05-03 1985-11-06 The Sumitomo Bank, Limited Schwimmflosse mit formveränderlicher Förder- und Leitfläche
EP0436927A1 (de) * 1990-01-12 1991-07-17 TECHNISUB S.p.A. Schwimmflosse mit mehrschichtigem Flossenblatt, sowie Verfahren zu ihrer Herstellung
FR2689404A1 (fr) * 1992-02-14 1993-10-08 Tabata Co Ltd Palme de natation et de propulsion, constituee de materiaux elastiques, a la fois durs et mous.
EP0640361A1 (de) * 1993-07-28 1995-03-01 TECHNISUB S.p.A. Schwimmflosse sowie Verfahren zu ihrer Herstellung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329307A1 (fr) * 1975-10-28 1977-05-27 Cavalero Rene Dispositif constructif fonctionnel de palme de natation a longue voilure incorporee
EP0160261A2 (de) * 1984-05-03 1985-11-06 The Sumitomo Bank, Limited Schwimmflosse mit formveränderlicher Förder- und Leitfläche
EP0436927A1 (de) * 1990-01-12 1991-07-17 TECHNISUB S.p.A. Schwimmflosse mit mehrschichtigem Flossenblatt, sowie Verfahren zu ihrer Herstellung
FR2689404A1 (fr) * 1992-02-14 1993-10-08 Tabata Co Ltd Palme de natation et de propulsion, constituee de materiaux elastiques, a la fois durs et mous.
EP0640361A1 (de) * 1993-07-28 1995-03-01 TECHNISUB S.p.A. Schwimmflosse sowie Verfahren zu ihrer Herstellung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100272970A1 (en) * 2009-04-28 2010-10-28 Hon Hai Precision Industry Co., Ltd. Fiber material component with 3d surface and method of manufacturing the same
US8641464B2 (en) 2010-04-08 2014-02-04 Cetatek Holdings Inc. Flippers, boots, systems including same, and methods of using same
US9737762B2 (en) 2010-04-08 2017-08-22 Cetatek Holdings Inc. Flippers, boots, systems including same, and methods of using same
US10112079B2 (en) 2010-04-08 2018-10-30 Cetatek Holdings Inc. Flippers, boots, systems including same, and methods of using same
US10675508B2 (en) 2010-04-08 2020-06-09 Cetatek Holdings Inc. Coupleable fin apparatuses and boot toe bodies
US9440114B2 (en) 2012-10-12 2016-09-13 Cetatek Holdings Inc. Boot sole system and fin for same
CN103990255A (zh) * 2013-02-18 2014-08-20 刘祖学 多用泳具
WO2019053751A1 (en) * 2017-09-13 2019-03-21 Alemanni Sub Di Alemanni Itio E C. S.A.S. PALM FOR SWIMMING UNDER WATER

Also Published As

Publication number Publication date
IT1293218B1 (it) 1999-02-16
ITGE970060A1 (it) 1999-01-11

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