WO2005056413A1 - Fermetures anti-effraction pour recipients - Google Patents

Fermetures anti-effraction pour recipients Download PDF

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Publication number
WO2005056413A1
WO2005056413A1 PCT/ZA2004/000154 ZA2004000154W WO2005056413A1 WO 2005056413 A1 WO2005056413 A1 WO 2005056413A1 ZA 2004000154 W ZA2004000154 W ZA 2004000154W WO 2005056413 A1 WO2005056413 A1 WO 2005056413A1
Authority
WO
WIPO (PCT)
Prior art keywords
cap
band
skirt
moulded
cavity
Prior art date
Application number
PCT/ZA2004/000154
Other languages
English (en)
Inventor
Jan Petrus Human
Original Assignee
Jan Petrus Human
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 Jan Petrus Human filed Critical Jan Petrus Human
Priority to US10/582,291 priority Critical patent/US20070131642A1/en
Publication of WO2005056413A1 publication Critical patent/WO2005056413A1/fr

Links

Classifications

    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3461—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure
    • B65D41/3466—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure and being integrally connected to the closure by means of bridges
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0049—Heat shrinkable
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure

Definitions

  • THIS INVENTION relates to tamper evident closures for containers such as bottles.
  • the most commonly used type of tamper evident threaded closure has a series of protrusions which project inwardly from a skirt and interlock with a bead of the container.
  • the protrusions are on a band which forms part of the skirt and which is joined along a line of weakening to the remainder of the skirt.
  • the band itself has a transverse line of weakening extending across it. It is intended that any attempt to remove the cap causes the band to break along its transverse line of weakening. However, it is possible with care to remove such a closure without damaging it, and then screw it back onto the bottle again without damaging it. It consequently does not reveal tampering.
  • the present invention provides an improved tamper evident closure.
  • a method of manufacturing a cap for closing a container comprising moulding the cap with a skirt which is subdivided by a circumferentially extending line of weakening into a main part and a band, at least the band being of heat shrinkable material.
  • the method of manufacturing can comprise moulding the cap and subsequently expanding the moulded band thereby to increase its diameter.
  • the band can be expanded mechanically by means of movable components of the mould, or can be subjected to air pressure which expands the band.
  • a cap which comprises a transverse end wall and a cylindrical skirt, an end portion of the skirt being in the form of a band which is connected to the skirt along a line of weakening, the band being of heat shrinkable material.
  • a method of closing a container which comprises fitting a cap as defined above onto the container, and subjecting the band to heating to shrink it onto the container.
  • a tamper evident cap which comprises a transverse end wall and a cylindrical skirt, the end portion of the skirt being in the form of a band joined to the remainder of the skirt by a series of bridges, the band having been stretched during manufacture and being of a material which shrinks when it is heated.
  • a tool for use in the manufacture of a tamper evident cap comprising a female mould and a mandrel which together define a mould cavity having the shape of the cap to be moulded, the mould cavity having a first part in which the greater part of the length of the skirt of the cap and a transverse end wall of the cap are moulded, a second part in which a band forming the end part of the skirt of the cap is moulded, and notches arranged in a circle, the notches joining the cavity parts and a series of bridges between the band and the remainder of the skirt being moulded in these notches, the inner diameter of at least a portion of the subsidiary cavity part being less than the inner diameter of at least a portion of the main cavity part.
  • a method of moulding a cap which comprises feeding synthetic plastics material to a mould cavity defined between surfaces of a mandrel and surfaces of a female mould, the mould cavity having the shape of the cap to be moulded, the mould cavity having a first part in which the greater part of the length of a skirt of the cap and a transverse end wall of the cap are moulded, a second part in which a band forming the end part of the skirt is moulded, and notches arranged in a circle and which join the cavity parts, the inner diameter of at least a portion of the subsidiary cavity part being less than the inner diameter of at least a portion of the main cavity part, and removing the moulded cap from the mandrel in such manner that the band is stretched as it passes over the part of the mandrel which defines the first part of the mould cavity.
  • Figure 1 is a section through a cap at an intermediate state in the moulding procedure;
  • Figure 2 is a similar section showing the cap at a later stage in the moulding procedure;
  • Figure 3 is a pictorial view showing the cap being presented to a bottle for fitting;
  • Figure 4 is a pictorial view showing the cap on the bottle;
  • Figure 5 is a diagrammatic section, to a larger scale, showing the cap and bottle of Figure 4;
  • Figure 6 is a view similar to that of Figure 4 and showing the cap after heat treatment;
  • Figure 7 is a diagrammatic section similar to that of Figure 5 and showing the cap after heat treatment;
  • Figure 8 is a section through a further cap;
  • Figure 9 is an axial section through a closed tool for use in manufacturing the cap of Figure 8;
  • Figure 10 shows the tool immediately after it has been opened; and
  • Figures 11a, 11b and 11c are sequence drawings showing a cap being rotated off a mandrel forming part of the tool of Figures 9 and 10.
  • the cap 10 shown in Figures 1 to 7 comprises a transverse end wall 12 and a skirt 14.
  • the skirt has internal threading at 16 which matches external threading of the neck (see Figures 5 and 7) of a container 18 which, in the illustrated embodiment, is in the form of a bottle.
  • the free end portion of the skirt 14 is in the form of a band 20.
  • the band is joined to the main part 22 of the skirt 14 by a series of circumferentially spaced bridges 24.
  • the effect of this is to provide a circumferentially extending line of perforations 26 which alternate with the bridges 24.
  • the line of perforations 26 is interrupted by a non-perforated zone 28 ( Figures 2 and 3) at which the band 20 is joined to the main part 22 of the skirt 14.
  • the non-perforated zone 28 constitutes a bridge which is wider than the bridges 24.
  • the band 20 has a line of weakening 30 which extends from the free edge thereof to the line of perforations 26.
  • the line of weakening 30 can comprise a series of perforations or a line where the band 20 is of reduced thickness.
  • the band 20 is thinner than the main part 22 of the skirt 14, and there is an internal step at 32 where the change in thickness occurs.
  • the cap is moulded with its band 20 tapering inwardly as shown in Figure 1.
  • the band 20 is stretched so that it takes on the cylindrical configuration shown in Figure 2. This can be achieved either mechanically by means of parts of the mould which expand forcing the still soft band 20 outwardly or by applying air pressure. This latter method is a technique known as stretch blow moulding.
  • PET is the preferred material for the cap but any other heat shrinkable plastics material can be used.
  • the cap 38 shown in Figure 8 has a transverse end wall 40 and a cylindrical skirt designated 42.
  • the skirt comprises a main part 44 and a subsidiary part in the form of a band 46.
  • the band 46 is joined to the skirt part 44 by way of a series of bridges 48.
  • the configuration of the cap 38 will be described in more detail hereinafter.
  • the tool 54 illustrated in Figures 9 and 10 comprises a female mould 56 and a male mandrel 58.
  • the mould 56 comprises two parts designated 60, 62.
  • the mould 56 has a cavity 64 (see particularly Figure 10) bounded by a transverse end surface 66 and a cylindrical side surface 64.
  • the part 62 of the female mould 56 has a runner 66 through it and a sprue 68 connecting the runner 66 to the cavity 64 of the mould 56.
  • the mandrel 58 comprises a cylindrical core 70 with a stem 72 protruding from it.
  • the mandrel 58 also comprises a rod 74 which is co-axial with the core 70 and the stem 72 and is both rotatable and axially shiftable relative thereto.
  • the final component of the mandrel 58 is a ring 76 which encircles the core 70 and the stem 72.
  • the core 70 and rod 74 define a composite end surface 78 which faces the surface 66 of the female mould 56.
  • the core 70 also has a cylindrical side surface 80 which faces the surface 64 of the mould 56.
  • the surface 80 has one or more helical grooves 82 cut into it.
  • the surfaces 66, 78 are parallel and spaced apart. Likewise the surfaces 64 and 80 are parallel and spaced apart.
  • the surface 80 of the core 70 intersects a conical surface 84 of the core along a circular line of intersection 86.
  • the surface 84 tapers from the circular line of intersection 86 towards a flat, annular surface 88 where the stem 72 protrudes from the core 70.
  • the ring 76 has a bore 90 through it.
  • the bore 90 has an inner surface 92 which tapers at an angle which is somewhat less than the angle of taper of the surface 84.
  • the surface 92 extends from one end face 94 of the ring 76 to an internal transverse surface 96.
  • the tapering surface 92 has a series of notches 98 therein immediately adjacent the end face 94.
  • the circular edge 86 touches the surface 92 of the ring 76.
  • the greater part of the length of the skirt of the cap and a transverse end wall are moulded in part MP1 and a band forming the end part of the skirt of the cap is mounted in part MP2.
  • the end of the rod 74 is formed with a cross shaped indentation 100 (see particularly Figure 11c).
  • Synthetic plastics material of a type which can be shrunk by the application of heat is injected through the runner 66 and sprue 68.
  • PET polytetrafluoroethylene
  • the main cavity part MP1 fills with material which eventually flows through the notches 98 and into the subsidiary cavity part MP2.
  • the mould is opened by separating the mould 56 and mandrel 58.
  • the mandrel 58, but not the mould 56, is shown in Figure 11a with a cap 38 on the mandrel 58.
  • the ring 76 is displaced axially with respect to the core 70.
  • Such linear motion is converted by threading or other suitable means to rotary and translational motion of the rod 74.
  • the cap 38 and rod 74 are at this time interconnected due to the plastics material in the indentation 100.
  • the cap 38 is turned with respect to the core 78 ( Figure 11 b) and is eventually screwed off the stationary core 70 by virtue of the helical thread 52 which the threading 82 has moulded into the inside surface of the skirt 42 of the cap (see Figure 8).
  • the band 46 has to be expanded outwardly to permit the cap to be taken off the core 70 of the mandrel 58.
  • the band 46 is thus stretched during manufacture and consequently, at the time the cap reaches the bottling plant, the band 46 is cylindrical and forms an extension of the main part 44 of the skirt 42.
  • the band 46 shrinks back to its unstretched condition (as shown in Figure 8) and tightly grips the container. Re-heating makes the band 46 and bridges 48 brittle. There is usually a protruding circumferentially extending bead between the open mouth of the container and the band, and the band pulls tightly under this bead.
  • the core 70 can taper very slightly from top to bottom (as viewed in Figure 10).
  • the thread 82 can taper so that its dimensions reduce in the top to bottom direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

L'invention concerne un bouchon (10) comprenant une paroi d'extrémité transversale (12) et une jupe (14). La jupe (14) est divisée par une ligne d'affaiblissement (24, 26) en une partie principale (22) et une bande (20). Au moins la bande (20) est faite de matériau thermorétrécissant. Lorsque la bande est chauffée après avoir été ajustée au récipient (18), elle rentre à l'intérieur sous la moulure circulaire (36) qui entoure le goulot du récipient.
PCT/ZA2004/000154 2003-12-12 2004-12-08 Fermetures anti-effraction pour recipients WO2005056413A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/582,291 US20070131642A1 (en) 2003-12-12 2004-12-08 Tamper evident closures for containers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ZA2003/9654 2003-12-12
ZA200309654 2003-12-12
ZA200400618 2004-01-27
ZA2004/0618 2004-01-27

Publications (1)

Publication Number Publication Date
WO2005056413A1 true WO2005056413A1 (fr) 2005-06-23

Family

ID=34681760

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2004/000154 WO2005056413A1 (fr) 2003-12-12 2004-12-08 Fermetures anti-effraction pour recipients

Country Status (2)

Country Link
US (1) US20070131642A1 (fr)
WO (1) WO2005056413A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2908746A1 (fr) * 2006-11-20 2008-05-23 Tetra Laval Holdings & Finance Bouchon pour un col de recipient et procede de fabrication d'un tel bouchon
CN108381864A (zh) * 2018-01-31 2018-08-10 广州中甲智能包装机械有限公司 一种免切防盗环的塑料瓶盖高效成型模具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019122359A1 (de) * 2019-08-20 2021-02-25 Schreiner Group Gmbh & Co. Kg Sicherungskappe zum Sichern eines Deckels, Kopfes oder Verschlusses an einem pharmazeutischen Gefäß

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1384370A (en) * 1971-01-11 1975-02-19 United Glass Ltd Closures for containers
US4378893A (en) * 1979-09-21 1983-04-05 H-C Industries, Inc. Composite closure
US4476987A (en) * 1982-04-20 1984-10-16 Maxcap, Inc. Bottle caps
EP0366198A1 (fr) * 1988-10-25 1990-05-02 Kornelis' Kunsthars Producten Industrie B.V. Fermeture pourvue d'une bande de garantie

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206851A (en) * 1979-02-23 1980-06-10 Ethyl Products Company Tamperproof closure
US4369889A (en) * 1981-06-08 1983-01-25 Ethyl Products Company Tamperproof closure
DE3233805A1 (de) * 1982-09-11 1984-03-15 Hans 8801 Schillingsfürst Heinlein Verschlusskappe, insbesondere fuer flaschenartige behaelter, mit einem orginalitaetssicherungselement
US4509654A (en) * 1983-03-24 1985-04-09 Maguire Daniel J Tamperproof closure
US4485934A (en) * 1983-03-24 1984-12-04 Maguire Daniel J Tamperproof closure
US4805792A (en) * 1984-04-17 1989-02-21 Continental White Cap, Inc. Litterless tamper indicating closure
US4923073A (en) * 1989-01-30 1990-05-08 H-C Industries, Inc. Tamper-indicating plastic closure
DE19705717A1 (de) * 1997-02-14 1998-08-20 Bericap Gmbh & Co Kg Kunststoffschraubverschluß
US7281638B2 (en) * 2001-07-24 2007-10-16 Obrist Closures Switzerland Gmbh Snap-hinge closure with tamper-evident lid and method of making

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1384370A (en) * 1971-01-11 1975-02-19 United Glass Ltd Closures for containers
US4378893A (en) * 1979-09-21 1983-04-05 H-C Industries, Inc. Composite closure
US4476987A (en) * 1982-04-20 1984-10-16 Maxcap, Inc. Bottle caps
EP0366198A1 (fr) * 1988-10-25 1990-05-02 Kornelis' Kunsthars Producten Industrie B.V. Fermeture pourvue d'une bande de garantie

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2908746A1 (fr) * 2006-11-20 2008-05-23 Tetra Laval Holdings & Finance Bouchon pour un col de recipient et procede de fabrication d'un tel bouchon
WO2008071860A3 (fr) * 2006-11-20 2008-10-02 Tetra Laval Holdings & Finance Bouchon pour un col de recipient et procede de fabrication d'un tel bouchon
US8808593B2 (en) 2006-11-20 2014-08-19 Tetra Laval Holdings & Finance S.A. Cap for the neck of a container and method for producing one such cap
CN108381864A (zh) * 2018-01-31 2018-08-10 广州中甲智能包装机械有限公司 一种免切防盗环的塑料瓶盖高效成型模具

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