EP1503941B1 - Composite stopper made of synthetic materials - Google Patents

Composite stopper made of synthetic materials Download PDF

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Publication number
EP1503941B1
EP1503941B1 EP03722898A EP03722898A EP1503941B1 EP 1503941 B1 EP1503941 B1 EP 1503941B1 EP 03722898 A EP03722898 A EP 03722898A EP 03722898 A EP03722898 A EP 03722898A EP 1503941 B1 EP1503941 B1 EP 1503941B1
Authority
EP
European Patent Office
Prior art keywords
rings
elastic rings
pair
elastic
stopper according
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.)
Expired - Lifetime
Application number
EP03722898A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1503941A2 (en
Inventor
Bruno Zeni
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.)
Piva Silvano
Original Assignee
Piva Silvano
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 Piva Silvano filed Critical Piva Silvano
Publication of EP1503941A2 publication Critical patent/EP1503941A2/en
Application granted granted Critical
Publication of EP1503941B1 publication Critical patent/EP1503941B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/0005—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in one piece
    • B65D39/0011—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in one piece from natural or synthetic cork, e.g. for wine bottles or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/0052—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in more than one piece
    • B65D39/0058—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in more than one piece from natural or synthetic cork, e.g. for wine bottles or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2539/00—Details relating to closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D2539/001—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers
    • B65D2539/006—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers provided with separate sealing rings

Definitions

  • the present invention is applicable in general in the field of stoppers for bottles and similar containers and relates in particular to a composite stopper made of synthetic materials according to the preamble of Claim 1.
  • stoppers for bottles are traditional stoppers made of cork.
  • stoppers made of plastic material Although for the user cork stoppers are synonymous with quality, the industry is starting to use stoppers made of plastic material. Research has led to a new generation of stoppers, made of various types of thermoplastic materials, such as polypropylene. Some synthetic stoppers comprise thermoplastic polyolefins, thermoplastic rubbers and wax-based additives. Stoppers made of thermoplastic materials have a number of objective advantages.
  • Cork stoppers may have internal cavities and suffer from flaking owing to their structural form and also, in some cases, poor drying.
  • Synthetic stoppers are made of thermoplastic material and have a coherent mass owing to the raw materials which have a constant density and compression during the moulding step. These differences in characteristics result, only in the case of cork stoppers, to oxidation and lack of uniform vinification between bottles in the same batch.
  • Cork has an elastic hysteresis curve with a long recovery time, meaning it is slow to recover its original volume following the compression undergone during bottling.
  • the plastic materials generally used in this sector have a much faster hysteresis curve. This means that bottles with cork stoppers may loose some of the liquid inside immediately after bottling and must be kept at an angle and in a damp environment in order to assist the absorption of moisture by the stopper and its consequent expansion. Bottles with synthetic stoppers, however, may be handled immediately after bottling and may be stored in a vertical position, saving space and volume, and do not require a damp environment.
  • cork stoppers depend on numerous factors, including the region of origin, the thickness and density of the bark, the ageing after harvesting and the degree of processing and finishing. Stoppers which are nominally identical, but which in practice differ notably from each other, create problems during the automatic bottling step and are unpredictable as regards sealing of the bottled product over time. Stoppers made of plastic material are generally manufactured by means of injection moulding with dimensional tolerances smaller than those of cork and using a highly repeatable process. This ensures more reliable results as regards automatic handling of the stoppers and constant sealing of the bottled wine over time.
  • Cork is an organic material and, as such, may in many cases be attacked by mould.
  • the smell of mould contaminates the contents of the bottle with an incidence which varies between 0.5% and 10%.
  • the plastic materials used to make stoppers, however, are inert and free from contamination.
  • the material used for said annular elements must therefore embrace various properties, such as high elasticity, low gas permeability, high compatibility for alimentary use and a cost which is not excessively high. It is difficult to achieve a good compromise between these properties without affecting the sealing action of the stopper.
  • a composite stopper (a stopper with O-ring) made of synthetic materials, particularly for bottles and similar containers, comprising a substantially cylindrical central body made of thermoplastic material and defining a longitudinal axis, with a side surface and two substantially flat end faces, and at least two elastic rings located in corresponding annular seats on said side surface.
  • the claimed invention differs from such embodiment because the elastic rings are made of plastic materials which are different from each other and from the base material of the central body.
  • a primary object of the present invention is that of eliminating the abovementioned drawbacks by providing a stopper made of plastic material, which stopper is effective and has a relatively low unit cost.
  • a particular object is that of providing a stopper which has optimum features as regards sealing action, prevention of loss of the liquid contents and instantaneous elastic recovery after bottling.
  • a further object of the invention is that of providing a stopper which allows the bottles to be laid down or handled immediately after bottling and be stored in avertical position, saving space and volume.
  • a further particular object is that of providing a stopper which does not require a damp environment in order to guarantee the sealing action preventing the passage of air and gas.
  • a further object of the invention is that of providing a stopper whose dimensions, surface characteristics and compactness are repeatable and suitable for automatic handling.
  • a composite stopper made of synthetic materials in particular for bottles and similar containers, comprising a substantially cylindrical central body made of thermoplastic material and defining a longitudinal axis, with a side surface and two substantially flat end faces, and at least two elastic rings located in corresponding annular seats on said side surface, characterized in that the elastic rings are made of elastomeric materials which are different from each other and from the base material of the central body, the base materials of the elastic rings are non-toxic and at least one of them is made of nitrile rubber and the other of silicone rubber.
  • the minimum diameter of the annular seats is slightly greater than the inner diameter of the elastic rings at rest. In this way, the elastic rings are retained in the corresponding annular seats without adhesives and only by virtue of their elastic properties.
  • a stopper is shown according to the invention, denoted in its entirety by reference number 1 and suitable in particular for bottles and similar containers.
  • the stopper 1 comprises a substantially cylindrical central body 2 made of thermoplastic material defining a longitudinal axis L.
  • This central body 2 has a side surface 3 and two substantially flat end faces 4, 4' which are mutually parallel and perpendicular to the axis L.
  • At least two elastic rings 5, 6 are housed in corresponding annular seats 7, 7' on the side surface 3. Said elastic rings 5, 6 are both made of non-toxic material.
  • the central body 2 and the two elastic rings 5, 6 are made of three different plastic materials.
  • the central body 2 is made of thermoplastic material, preferably polypropylene, while a nitrile rubber is used for the elastic ring 5 and a silicone rubber for the ring 6.
  • the nitrile rubber used is a butadiene/acrylonitrile copolymer and is such that it ensures optimum air and gas impermeability. Further formulations are possible in order to increase in particular the gas impermeability of the nitrile rubber.
  • the silicone rubber used is a polysiloxane polymer and has a formulation able to guarantee complete compatibility for alimentary use, a very high resistance to ageing, physiological and biological non-toxicity, and almost total resistance to micro-organisms, such as bacteria and fungi.
  • the elastic rings 5, 6 have a roughly toroidal form with an internal diameter DI which, at rest, is smaller than the minimum diameter DM of the annular seats 7, 7'.
  • the elastic rings 5, 6 are stretched and then inserted into the seats 7, 7', where they remain elastically under tension owing to the fact that the internal diameter DI of the elastic rings 5, 6 increases until it is the same as the minimum diameter DM of the annular seats 7, 7'.
  • the elastic rings 5, 6 are retained in their seats 7, 7' only by virtue of their elastic properties and the use of any adhesive is not envisaged.
  • the elastic ring 5 made of nitrile rubber and the elastic ring 6 made of silicone rubber form a first pair 8 of elastic rings arranged longitudinally staggered at a predetermined distance.
  • the pair 8 of elastic rings 5, 6 is located close to one of the two flat faces 4, 4' of the central body 2.
  • the stopper 1 comprises a further elastic ring 9 made of nitrile rubber and a further elastic ring 10 made of silicone rubber.
  • These further elastic rings 9, 10 are arranged longitudinally staggered at a predetermined distance in two further annular seats 11, 11' on the side surface 3 so as to form a second pair 12 of elastic rings 9, 10.
  • the second pair 12 is positioned on the side surface 3 so as to form a mirror image of the pair 8 of elastic rings with respect to a central plane P of said central body 2, said central plane being parallel to said flat faces 4, 4'.
  • This mirror-image arrangement of the two pairs 8, 12 and the total interchangeability between the rings 5, 9 and the rings 6, 10 mean that the stopper 1 may be inserted into the neck of the container or bottle irrespective of which end faces inwards.
  • the elastic rings 6, 10 made of silicone rubber of both the pairs 8, 12 are located closer to the flat faces 4, 4' than the elastic rings 5, 9 made of nitrile rubber.
  • the stopper 1 is inserted by means of pressure into the neck of the container or bottle so that all the elastic rings 5, 6, 9, 10 are compressed against the inner surface of the neck of the bottle.
  • the elastic rings 5, 6, 9, 10, despite being under tension in the respective annular seats 7, 7', 11, 11', retain a certain residual elasticity, which allows them to deform elastically on coming into contact with the inner wall of the neck of the bottle. This means that the elastic rings 5, 6, 9, 10 adhere completely to the bottle neck along their entire circumference.
  • the elastic rings 6, 10 made of silicone rubber as opposed to the elastic rings 5, 9 made of nitrile rubber, have been positioned at the ends.
  • the liquid contained may only come into contact with one of the two elastic rings 6, 10 made of silicone rubber, which is distinguished by the complete absence of toxicity and the high degree of compatibility for alimentary and even sanitary use. Therefore, the ideal positioning of the elastic rings 6, 10 is in the areas of the stopper which may interact most easily with the contents of the bottle on one side and with the external environment on the other side, namely the portions close to the longitudinal ends of the stopper 1.
  • the elastic rings 5, 9 made of nitrile rubber are distinguished by their optimum air and gas impermeability and may therefore perform their tasks in an optimum manner when positioned further inside longitudinally.
  • the stopper according to the invention achieves the predetermined objects and, in particular, guarantees a high performance in terms of sealing action and preventing losses of the liquid inside the bottle. Moreover, the stopper has a low unit cost because it may be manufactured easily and handled automatically, and its manufacturing process results in low dimensional tolerances, a reduced number of rejects and low degree of non-conformity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Materials For Medical Uses (AREA)
EP03722898A 2002-05-08 2003-05-08 Composite stopper made of synthetic materials Expired - Lifetime EP1503941B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2002VI000088A ITVI20020088A1 (it) 2002-05-08 2002-05-08 Tappo composito in materiali sintetici
ITVI20020088 2002-05-08
PCT/IB2003/001783 WO2003095318A2 (en) 2002-05-08 2003-05-08 Composite stopper made of synthetic materials

Publications (2)

Publication Number Publication Date
EP1503941A2 EP1503941A2 (en) 2005-02-09
EP1503941B1 true EP1503941B1 (en) 2006-04-12

Family

ID=29416489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03722898A Expired - Lifetime EP1503941B1 (en) 2002-05-08 2003-05-08 Composite stopper made of synthetic materials

Country Status (10)

Country Link
US (1) US20050173371A1 (zh)
EP (1) EP1503941B1 (zh)
CN (1) CN1652979A (zh)
AT (1) ATE323033T1 (zh)
AU (1) AU2003230057A1 (zh)
DE (1) DE60304570D1 (zh)
IT (1) ITVI20020088A1 (zh)
RU (1) RU2004132184A (zh)
WO (1) WO2003095318A2 (zh)
ZA (1) ZA200408433B (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2299340B1 (es) * 2006-04-18 2009-04-01 Edmundo Rodriguez Bombin Tapon acondicionador.
ES2349100B1 (es) * 2009-01-14 2011-10-24 Sistemas Especiales De Inyeccion (S.E.I.) S.L. Tapon para botellas.
US9199768B1 (en) 2015-02-11 2015-12-01 Ryan M. Casey Two-piece stopper
ITUB20155962A1 (it) * 2015-11-27 2017-05-27 Candusso Aldo "tappo composito per bottiglie, in particolare di vino, con effetto barrique"
EP3431542B1 (en) * 2016-03-18 2020-09-02 Zeon Corporation Nitrile rubber composition and rubber cross-linked product
US10597199B1 (en) * 2016-07-01 2020-03-24 Christopher Joseph Manning Closure and an assembly of the closure with a container
CN110803390A (zh) * 2019-11-26 2020-02-18 湖北辰诺医药包装科技有限公司 一种体外诊断试剂瓶用橡胶塞及其制备方法
US11760541B2 (en) 2021-06-25 2023-09-19 Phillip James Fricano Tamper resistant reusable wine bottle stopper compatible with cork-screw-extractors

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434615A (en) * 1967-09-11 1969-03-25 Int Equipment Co Centrifuge bottle and closure therefor
US4420076A (en) * 1982-06-29 1983-12-13 Beveridge Lois M Moisture resistant, quick release pill container
JPH10501783A (ja) * 1994-03-18 1998-02-17 デューコ インヴェストメンツ ピーティワイ エルティディ 閉止栓
DE29501432U1 (de) * 1995-01-30 1995-06-08 Schima Mirko Wein- bzw. Sektflaschenverschluß
AT404317B (de) * 1996-08-02 1998-10-27 Greiner & Soehne C A Verschlussvorrichtung, trennvorrichtung sowie aufnahmebehälter für eine aufnahmeeinrichtung
AU3067000A (en) * 1999-02-02 2000-08-25 Royal Packaging Industries Van Leer N.V. Improved container closures
US6478178B2 (en) * 2001-03-08 2002-11-12 Donald C. Montgomery Fermentation lock for wine barrel

Also Published As

Publication number Publication date
WO2003095318A3 (en) 2004-03-04
AU2003230057A1 (en) 2003-11-11
ATE323033T1 (de) 2006-04-15
EP1503941A2 (en) 2005-02-09
CN1652979A (zh) 2005-08-10
RU2004132184A (ru) 2005-06-27
US20050173371A1 (en) 2005-08-11
ZA200408433B (en) 2005-09-27
WO2003095318A2 (en) 2003-11-20
ITVI20020088A1 (it) 2003-11-10
DE60304570D1 (de) 2006-05-24

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