EP0147404A1 - Bande de garantie pour fermeture de conteneur - Google Patents

Bande de garantie pour fermeture de conteneur

Info

Publication number
EP0147404A1
EP0147404A1 EP19840901318 EP84901318A EP0147404A1 EP 0147404 A1 EP0147404 A1 EP 0147404A1 EP 19840901318 EP19840901318 EP 19840901318 EP 84901318 A EP84901318 A EP 84901318A EP 0147404 A1 EP0147404 A1 EP 0147404A1
Authority
EP
European Patent Office
Prior art keywords
closure
guarantee band
guarantee
webs
section
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Withdrawn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
EP19840901318
Other languages
German (de)
English (en)
Inventor
Walter Wiedmer
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.)
WIEDMER Ernst
Original Assignee
WIEDMER Ernst
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 WIEDMER Ernst filed Critical WIEDMER Ernst
Publication of EP0147404A1 publication Critical patent/EP0147404A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B65D41/46—Snap-on caps or cap-like covers
    • B65D41/48—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics
    • 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

Definitions

  • the invention relates to a guarantee band on a container closure made of plastic, at least this guarantee band being heat-shrinkable and being connected to the closure via a plurality of webs which adjoin the front edge of the closure and run parallel to the axis of rotation of the closure and from there in its outer diameter over a part of its height either constant or then different over several sub-areas, but also constantly increasing within each sub-area.
  • guarantee strips As is well known, the purpose of such guarantee strips is to indicate a first opening, namely an unauthorized one, either by destroying the guarantee band or then by tearing the webs that connect the closure.
  • closures that are made of thermoplastic plastic to use such a plastic that is also heat shrinkable.
  • the container neck usually has a slightly smaller diameter than the area immediately adjacent to the container mouth.
  • the closure is matched to the normally standardized bottles in such a way that the guarantee band fits tightly on the bottle neck with the smaller diameter after it has been put on and heat shrunk. When the closure is opened, there is therefore inevitably an expansion of the guarantee band and thus the above-mentioned tearing of the connecting webs.
  • such a guarantee band is characterized by the features of claim 1.
  • this band or its cross section is divided into three partial areas 61, 62, 63.
  • the inner diameter d is constant in all of these partial areas.
  • the outer diameter D is variable; it increases steadily in the upper and middle sections 61 and 62, however, in section 61 more than in section 62.
  • the two sections could also be combined into a single one, in which the outer diameter then increases uniformly over the entire height ⁇ men would. In any case, one or more, here two conical sections are created in this way.
  • the taper is an absolute technical necessity, which is to be explained using the briefly described demolding process.
  • the upper part 7 and the lower part 8 of an injection mold are shown schematically in dashed lines; the inner core of it is omitted for the sake of dearness.
  • the upper part 7 is shown at the moment when it is lifted in the direction of arrow 9 from the lower part 8 after the injection process has ended, so that the entire closure body 1 is essentially exposed.
  • a further intermediate step which is not essential here, it is also ejected in the same direction.
  • the largest outer diameter of the partial region 62 is larger than the inner diameter of the part 8 of the injection mold; this has a clearly visible undercut 81.
  • the entire guarantee band must slide upwards along this undercut when ejecting, it being compressed for a short time.
  • the lowest partial area 63 has a constant outer diameter D over its entire height and therefore, in view of the already constant inner diameter d, has a constant cross section.
  • a relatively large amount of plastic material is concentrated in this subarea, which then contracts the most when heat shrinks (see dash-dotted line). In this way, a secure contact with the container neck is achieved in spite of the short period of exposure to heat, the upper sections 61, 62 with their smaller cross-section also bending more easily.
  • the height h of the partial area 63 can increase up to half the height of the guarantee band 6, but is expediently limited to a value corresponding to the wall thickness s of this partial area 63 for the reasons explained above. In this case, this partial area is therefore of square cross section.

Abstract

La bande de garantie (6) reliée par des parts minces (4) à la fermeture (1) possède différentes parties (61, 62, 63). Les deux parties supérieures (61, 62) présentent un diamètre extérieur (Dvar) décroissant vers le bas, ce qui est indispensable en raison de la déformation de la bande de garantie à partir de la partie inférieure (8) du moule par injection. La partie inférieure (63) est en revanche de section transversale rectangulaire, de préférence carrée. Ainsi y est concentré relativement beaucoup de matériau qui se contracte avec force lors du rétrécissement à chaud et qui assure de la sorte un positionnement sûr de la bande de garantie contre le conteneur.
EP19840901318 1983-06-02 1984-04-12 Bande de garantie pour fermeture de conteneur Withdrawn EP0147404A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH301483 1983-06-02
CH3014/83 1983-06-02

Publications (1)

Publication Number Publication Date
EP0147404A1 true EP0147404A1 (fr) 1985-07-10

Family

ID=4246693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840901318 Withdrawn EP0147404A1 (fr) 1983-06-02 1984-04-12 Bande de garantie pour fermeture de conteneur

Country Status (2)

Country Link
EP (1) EP0147404A1 (fr)
WO (1) WO1984004736A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE34145T1 (de) * 1984-07-31 1988-05-15 Verpackungssysteme Ag Garantieband fuer behaelterverschlusskappen.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206852A (en) * 1979-01-26 1980-06-10 Aluminum Company Of America Linerless closure for pressurized container
EP0067650B1 (fr) * 1981-06-08 1986-08-20 Tredegar Molded Products Company Capsule de bouchage à bague de garantie
EP0076778A1 (fr) * 1981-10-05 1983-04-13 Crown Obrist AG Bouchon de fermeture en matière plastique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8404736A1 *

Also Published As

Publication number Publication date
WO1984004736A1 (fr) 1984-12-06

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB LU NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850507

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WIEDMER, WALTER