EP0169923A1 - Bande de garantie pour fermeture de récipient - Google Patents

Bande de garantie pour fermeture de récipient Download PDF

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Publication number
EP0169923A1
EP0169923A1 EP84109066A EP84109066A EP0169923A1 EP 0169923 A1 EP0169923 A1 EP 0169923A1 EP 84109066 A EP84109066 A EP 84109066A EP 84109066 A EP84109066 A EP 84109066A EP 0169923 A1 EP0169923 A1 EP 0169923A1
Authority
EP
European Patent Office
Prior art keywords
guarantee
band
cap
guarantee band
container
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.)
Granted
Application number
EP84109066A
Other languages
German (de)
English (en)
Other versions
EP0169923B1 (fr
Inventor
Ag Verpackungssysteme
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP84109066A priority Critical patent/EP0169923B1/fr
Priority to AT84109066T priority patent/ATE34145T1/de
Priority to DE8484109066T priority patent/DE3471070D1/de
Publication of EP0169923A1 publication Critical patent/EP0169923A1/fr
Application granted granted Critical
Publication of EP0169923B1 publication Critical patent/EP0169923B1/fr
Expired 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
    • 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 for container closure caps made of thermoplastic materials in injection molds, the guarantee band comprising a bead on the container by means of hot deformation and being integrally connected to the container closure cap by at least one web.
  • Guarantee tapes for container closure caps of the type mentioned are known.
  • the starting point for creating such container closure caps equipped with guarantee tapes is the fact that mass production of liquids, in particular beverages, and their filling in containers, mostly bottles. It is now a question of providing a closure which, on the one hand, meets high requirements for the secure closability of the container, on the other hand can be produced in large quantities as a genuine mass article, and in particular can also be securely applied to the container as easily as possible. Another requirement is to indicate the original packaging condition to the buyer of a container using the undamaged guarantee band. When the original sealed container is opened for the first time, the guarantee tape breaks off at the intended tear points and provides clear information about the opening of the container. As already stated above, such ver conclude about pronounced mass articles, which are used in quantities in hundreds of millions a year above all in the beverage industry.
  • Container closures of the type mentioned include known from DE-PS 25 59 827 and GB-PS 651 238.
  • the problems which show in the manufacture and handling of such a guarantee closure are u. a. justified in the use of thermoplastic as a material for closure and / or guarantee tape. Parts made from such a material can be produced in injection molds, but there are problems with the molding of the closures.
  • the injection point is usually on the lid surface. The filling process in the injection mold therefore begins at the lid or the top of the closure cap and fills the areas of the guarantee band at the end of the injection process.
  • Guarantee bands with a wedge-shaped course the wedge being attached to the cap with its tip, consequently with the thinnest point of the guarantee band, it is above all difficult to inject because they both have very long webs, because of the slender one
  • the wedge course of the growing guarantee band and also because these webs cannot be reinforced arbitrarily, since they have to tear when the container is opened before the entire guarantee band rotates on the container and there is insufficient resistance.
  • the object of the invention is to provide a guarantee tape of the type mentioned, which can be demolded vertically with optimal freedom from interference, and can include the container bead with little heating, and its guarantee band function both in storage, transport and use of the closed container guaranteed.
  • the guarantee tape preferably made of polyethylene
  • the connection between the cap and the guarantee band is shaped and reinforced in such a way that the larger shrinkage of the cap inevitably takes the guarantee band, which in itself is less shrinking, radially inwards, thereby not only making the demolding considerably easier but also making it practically unproblematic.
  • the small horizontal surface area following the inner groove or the inner radius of the guarantee band leads to the desired deformation or. Shrinkage behavior of the tape so that the vertical demolding can be carried out due to the targeted radial shrinkage of the plastic.
  • the bridge is thin enough to further support the unproblematic removal from the mold, on the other hand it has exactly the strength that guarantees the necessary durability of the guarantee band on the one hand, but on the other hand the necessary handling. It is particularly important that the contact of the tape on the bottle, which is known to be necessary from the prior art, is not necessary for better heat dissipation, since there is no fear of a burn-out due to the full cross-section of the web. Ultimately, it can be rightly said that a container closure cap according to the invention can be mass-produced cheaply and inexpensively by injection molding, without having to use the tool with radially opening slides or jaws.
  • a targeted shrinkage advantage with regard to the shrinkage behavior of the guarantee band after the manufacturing process consists in the application of reinforcements on the guarantee band, which is cylindrical in itself. Such reinforcements can have a positive influence on the shrinkage behavior, but are not absolutely necessary, since the geometrical formations of the web and the guarantee band mean that problem-free demolding can be provided.
  • FIG. 1 shows in cross-section a guarantee band 2 attached to a cap 1, the cap 1 surrounding a bead 4 of a container (not shown in more detail).
  • a web 3 extends from the cap 1 to the guarantee band 2, the cap 1, web 3 and guarantee band 2 being made in one piece by injection molding from thermoplastic, preferably polyethylene.
  • thermoplastic preferably polyethylene
  • the upper edge of the guarantee tape 2 is equipped with an inner throat 7 and an adjoining horizontal surface 5.
  • the horizontal surface 5 can merge into an outer throat 6.
  • the outer throat 6 can have a small radius as well as end in a sharp edge.
  • the radius of the inner throat 7 corresponds approximately to the thickness of the guarantee band, the radius of this inner throat 7 not running up tangentially.
  • the guarantee tape 2 does not rest on the bottle bead 4 - as is the case from the stand the technology is known - rather protrudes beyond the bead and therefore can shrink slightly radially and can be guided around the bead.
  • the horizontal surface 5 supports the radial rumping of the plastic after the injection step, so that a slight vertical removal from the mold is ensured.
  • the horizontal surface 5 and inner throat 7 lead to extremely easy demoldability, which is essential for successful rapid mass production.
  • the guarantee band 2 itself is essentially cylindrical over its entire course.
  • the already mentioned inner throat 7 is located in the areas between the webs. This shows that the full band profile is already present in the area of the web and is maintained over the entire area of the guarantee band in the manner of a hollow cylinder.
  • Fig. 2 shows a variant of the guarantee tape according to the invention with a thickening 8.
  • This thickening 8 can be crowned in the form shown, or also flattened.
  • the area of the thickening 8 can be varied, from the lower edge of the guarantee band upwards.
  • web 3 and guarantee band 2 run against cap 1 with essentially the same cross section.
  • the horizontal surface 5 is to be chosen in terms of its width so that it corresponds approximately to the difference between the shrinkage of the cap diameter and the shrinkage of the guarantee strip diameter.
  • the optimal Entformun mentioned, g seigen- companies one. It is also important to ensure that the guarantee tape 2 start with the web 3 in an area on the cap 1, which facilitates shaping in that the thicker cap shrinks considerably more than the thinner guarantee band and consequently the guarantee band takes radially inward during the cap shrinkage and thereby considerably facilitates the removal from the mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP84109066A 1984-07-31 1984-07-31 Bande de garantie pour fermeture de récipient Expired EP0169923B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP84109066A EP0169923B1 (fr) 1984-07-31 1984-07-31 Bande de garantie pour fermeture de récipient
AT84109066T ATE34145T1 (de) 1984-07-31 1984-07-31 Garantieband fuer behaelterverschlusskappen.
DE8484109066T DE3471070D1 (en) 1984-07-31 1984-07-31 Anti-tamper strip for a container closure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84109066A EP0169923B1 (fr) 1984-07-31 1984-07-31 Bande de garantie pour fermeture de récipient

Publications (2)

Publication Number Publication Date
EP0169923A1 true EP0169923A1 (fr) 1986-02-05
EP0169923B1 EP0169923B1 (fr) 1988-05-11

Family

ID=8192086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109066A Expired EP0169923B1 (fr) 1984-07-31 1984-07-31 Bande de garantie pour fermeture de récipient

Country Status (3)

Country Link
EP (1) EP0169923B1 (fr)
AT (1) ATE34145T1 (fr)
DE (1) DE3471070D1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2261936A1 (fr) * 1974-02-25 1975-09-19 Leer Koninklijke Emballage
EP0113642A1 (fr) * 1983-01-07 1984-07-18 Crown Obrist AG Capuchon de fermeture pour un récipient et procédé de fabrication de celui-ci
WO1984004736A1 (fr) * 1983-06-02 1984-12-06 Ernst Wiedmer Bande de garantie pour fermeture de conteneur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2261936A1 (fr) * 1974-02-25 1975-09-19 Leer Koninklijke Emballage
EP0113642A1 (fr) * 1983-01-07 1984-07-18 Crown Obrist AG Capuchon de fermeture pour un récipient et procédé de fabrication de celui-ci
WO1984004736A1 (fr) * 1983-06-02 1984-12-06 Ernst Wiedmer Bande de garantie pour fermeture de conteneur

Also Published As

Publication number Publication date
EP0169923B1 (fr) 1988-05-11
ATE34145T1 (de) 1988-05-15
DE3471070D1 (en) 1988-06-16

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