EP0299170A1 - Fermeture à vis pour un réceptacle - Google Patents

Fermeture à vis pour un réceptacle Download PDF

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Publication number
EP0299170A1
EP0299170A1 EP88108186A EP88108186A EP0299170A1 EP 0299170 A1 EP0299170 A1 EP 0299170A1 EP 88108186 A EP88108186 A EP 88108186A EP 88108186 A EP88108186 A EP 88108186A EP 0299170 A1 EP0299170 A1 EP 0299170A1
Authority
EP
European Patent Office
Prior art keywords
ring
ring part
cap
container
closure
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Withdrawn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
EP88108186A
Other languages
German (de)
English (en)
Inventor
Kurt Fernholz
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.)
METALLWARENFABRIK GmbH
Original Assignee
METALLWARENFABRIK GmbH
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 METALLWARENFABRIK GmbH filed Critical METALLWARENFABRIK GmbH
Publication of EP0299170A1 publication Critical patent/EP0299170A1/fr
Withdrawn legal-status Critical Current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
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3438—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being formed separately but connected to the closure

Definitions

  • the invention relates to a screw closure for containers according to the preamble of patent claim 1.
  • Containers in particular bottles, are provided with screw caps which have a cap made of metal. At the lower end of the cap, a locking ring is provided, which tears when screwed on.
  • the circlip on the one hand forms a safeguard against unintentional opening of the container and on the other hand also a visible indication of the first opening of the container, and thus it has a guarantee function for the originality of the container contents.
  • Screw closures are known in which the locking ring of the closure cap is formed in one piece and consists of metal. With these screw caps, the tear line is a round cut, or All-round cut with one or more vertical notches, which are separated from each other by webs. The lower end of the cap is pressed under the bead of the container and thus held on the container.
  • Screw closures are also known, in which the closure cap is made of metal, the locking ring being a separate plastic part, the upper ring part of which is surrounded by a flanged edge of the metallic closure cap and is held in the closure cap, while the lower ring part which is connected to the upper ring part a tear line is connected, protrudes downward from the metallic closure cap in order to engage under the container bead with an obliquely upward and inward lip (DE-GM 82 31 160).
  • the upper ring part of the locking ring is inserted into an outwardly projecting collar ring of the closure cap and then the lower boundary edge of the collar ring is flanged to hold the upper ring part.
  • the ring collar has a conical shape in order to compress the upper end of the upper ring part more radially than the lower end. This provides the locking ring with an internal tension so that the lower ring part shoots outwards when torn off compared to the upper ring part. This makes opening the screw cap easier to see.
  • the known screw closures have the disadvantage, in part, that a flanging operation with the circlip inserted is required for the assembly of the retaining ring on the closure cap.
  • Another disadvantage is that the circular blanks, from which the caps are made by deep drawing, have different dimensions than blanks for one-piece screw caps, in which the locking ring consists of the metal of the cap.
  • different round blanks have to be punched than for two-piece screw caps, in which the locking ring is made of plastic.
  • the aluminum sheets are printed before punching. Different plate sizes therefore also require different print layouts or different printing plates of a printing press.
  • the invention has for its object to provide a screw cap of the type specified in the preamble of claim 1, in which no deformations must be carried out on the cap for the assembly of the locking ring on the cap, with a fixed defined hold of Circlip on the cap under tension is guaranteed.
  • the lower boundary edge of the sleeve ring is bent inward and upward in a V-shape, so that it forms a conical ring guide for the insertion of the upper ring part of the locking ring.
  • the closure cap can be prepared so that the upper ring part of the retaining ring can be inserted into the closure cap by a pushing-in movement and snaps into place there.
  • the upper ring part is temporarily elastically deformed. As soon as the head has passed the lower boundary edge of the cuff ring, it snaps out over the edge of the lower boundary edge in order to be held under axial tension in the interior of the cuff ring.
  • the tear line which is arranged at the lower end of the neck is not or only slightly stressed by the deformation of the head, so that there is no risk that the lower ring part tears off from the upper ring part.
  • the securing ring is thus fastened to the closure cap by simply pressing it in, without a deformation process on the closure cap being necessary.
  • the shape of the sealing cap is carried out preparatively before the securing ring is inserted. Then the thread has to be rolled into the cap on a container or glass bottle.
  • the feature of claim 3 causes the lower ring part to receive a stop by the bending of the sleeve ring against which the contact surface is pressed.
  • the part of the lower ring part which engages under the container bead presses the contact surface against the bend.
  • the lower ring part receives a tension and when the lower ring part is torn circumferentially, the latter is pressed outward to indicate the opening of the container.
  • the position of the lower ring part is also stabilized by the abutment of the contact surface against the bending of the sleeve ring.
  • the circular blanks from which the caps are made with a two-part screw cap have the same dimensions as with a one-piece screw closure in which the metallic locking ring of the closure cap is integrally formed.
  • the aluminum sheets can be prefabricated and printed in the same format sizes for both types of closures, and it is only later decided whether these sheets are used for a two-part or for a one-part screw closure.
  • the screw cap according to the invention can also be designed so that the total height of the cap and the locking ring used is substantially equal to the total height of a one-piece screw cap.
  • the same sealing machines and feeders can be used for one-piece and two-piece screw caps. In the case of two-part screw closures, only the device for flanging the edge of the closure cap around the container bead is to be left out or put out of operation.
  • the closure cap 10 contains a plastic sealing layer 13 below the boundary wall 12 and in the region of the transition between the boundary wall 12 and the jacket 11.
  • An inwardly directed bead 14 is provided on the jacket 11.
  • the cuff ring 15 which is bulged outwards and has a frustoconical upper boundary wall 16 which runs obliquely upwards and inwards and a lower boundary wall 17 which likewise runs obliquely upwards and inwards.
  • the cone angle of the lower boundary wall 17 is smaller than that of the upper boundary wall 16.
  • the sleeve ring 15 with the two boundary walls 16 and 17 encloses an annular space 18.
  • FIGS. 1 and 2 Of the container 19, which is to be closed with the closure, is shown in FIGS. 1 and 2 only the container neck 20 with the external thread 21 and the bead 22 below of the external thread.
  • This container 19 is a glass bottle, for example for drinks.
  • a pressure tool presses the closure cap firmly against the container neck from above and the thread 23 is rolled into the jacket 11 with thread rolls so that the thread 23 of the closure cap adapts the thread 21 of the container neck 20.
  • the locking ring 24 is attached at the lower end of the metal, e.g. Aluminum, existing cap 10.
  • This locking ring is made of plastic and it has an upper ring part 25 protruding into the annular space 18 and a lower ring part 26 connected to it in one piece and projecting from the lower end of the closure cap 10.
  • the upper ring part 25 consists of the annular neck 27 of relatively small wall thickness and the head 28 adjoining it at the top, which protrudes outwards from the neck 27 to form a step 29.
  • the inner sides of neck 27 and head 28 are flush with one another and form a common cylindrical inner surface.
  • the head 28 has at its upper outer end a bevel 30, the cone angle of which is smaller than that of the upper boundary wall 16, so that the upper end of the head 28 abuts against the inside of the boundary wall 16, while the upward edge 31 from below against the throat formed by level 29.
  • the tear line 32 adjoins the neck 27 at the bottom.
  • This tear line is a line of weakness that extends around the entire circumference of the securing ring 24 extends.
  • the line of weakness 32 can be interrupted at least at one point by a retaining web if the lower ring part 26 is interrupted circumferentially by tear lines.
  • the tear line 32 is at the same height as the bend 33 at which the cuff ring 15 merges into the lower boundary wall 17.
  • the bend 33 runs at an acute angle, which is preferably less than 45 ° and in particular about 20 ° to the collar ring 15.
  • the bend 33 is designed as a relatively sharp bend, in contrast to a flanged edge which has a larger radius of curvature.
  • the lower ring part 26 has an almost square block 34 with a rectangular cross section, the inner wall of which is flush with the inner walls of the neck 27 and head 28.
  • the upper surface of the block 34 forms a contact surface 35, which lies against the bend 33 from below.
  • the outer circumferential surface of the block 34 lies approximately flush with the outer surface of the sleeve ring 15.
  • An elastic tongue 36 projects upwards and inwards from the lower region of the inner surface of the block 34. This tongue 36 slides along the outside of the bead 22 when the closure cap is pushed onto the container neck 20. As soon as the upper end of the tongue 36 has passed the bead 22, the tongue 36 lies down under FIG. 2 the lower limit of the bead 22 to form an anchor for the container closure on the container 19.
  • the snap ring 24 is attached to the cap 10 by inserting its head 28 into the lower end of the cap.
  • the lower boundary wall 17 forms a guide slope on which the bevel 30 of the locking ring slides.
  • the upper ring part 25 of the locking ring 24 is thereby radially deformed.
  • the head 28 snaps over the edge 31 of the boundary wall 17, so that the upper ring part 25 can expand radially again.
  • the distance between the shoulder 29 and the contact surface 35 is slightly smaller than the axial height of the lower boundary edge 17, so that the retaining ring is kept taut by the boundary edge 17, but without the tear line 32 being excessively stressed.
  • Fig. 2 the course of the jacket 11 'is shown in dashed lines, which would result if the sleeve ring 5 together with its boundary edges 16 and 17 are not formed from the stamped blank would. It can be seen that the jacket 11 'would protrude the lower end of the container bead 22.
  • the course of the shell 11 ' corresponds to that of a one-piece cap, including the retaining ring.
  • the additional representation of the jacket 11 ' is intended to clarify that the cap blank, and thus also the blank from which the blank is made, in the two-part screw closure has the same dimensions as in a one-piece screw closure with an integrally formed locking ring. In the case of a one-piece screw closure, the lower end of the casing 10 would be flanged around the lower end of the bead 22.
  • the punch blank 10A shown in FIG. 3 with the jacket 11 and the boundary edge 12 is produced from a flat blank, the sleeve ring 15 with the oblique boundary edge 16 already being formed.
  • an inward bevel 40 of approximately 45 ° is rolled onto the collar ring 15 in accordance with FIG. Furthermore, a knurled grip 41 and adjoining it an inwardly directed bead 42 are rolled onto the casing 11.
  • the next process consists in that the slope 40 produced according to FIG. 4 is pressed flat in the step shown in FIG. 5, so that an inwardly directed flange 44 is created.
  • This flange 44 is bent according to FIG. 6 to produce the boundary edge 17 described above even further by approximately 60 °, so that it points obliquely inwards and is bent by approximately 150 ° relative to the cuff ring.
  • Fig. 7 shows the insertion of the locking ring 24 into the sleeve ring 15, the locking ring being pressed axially against the open end of the closure cap prepared in the manner described.
  • the bevel 30 slides along the inclined boundary wall 17 until the head 25 engages in the space 18 of the sleeve ring 15.
  • the screw cap prepared in this way is ready to be placed on the container neck and to roll the thread 23.
  • the boundary edge 17 is shorter than the boundary edge 16.
  • the boundary edge 17 forms a barb protruding into the space 18 for supporting the locking ring.
  • the locking ring tears along tear line 32. If the lower ring part 26 consists of several segments, these also tear open. In this case, the lower ring member 26 is connected to the upper ring member 25 via retaining webs (not shown) which cause each of the segments of the lower ring member to remain on the upper ring member.
  • the lower ring part is torn in that the cap 10 is rotated axially on the bottle thread is moved while the lower ring part 26 is anchored with the tongue 36 under the bead 22.
  • the tongue 36 protrudes from the block 34 at an acute angle, which increases the spreading action when opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP88108186A 1987-07-09 1988-05-21 Fermeture à vis pour un réceptacle Withdrawn EP0299170A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3722603 1987-07-09
DE19873722603 DE3722603C1 (de) 1987-07-09 1987-07-09 Schraubverschluss fuer Behaelter

Publications (1)

Publication Number Publication Date
EP0299170A1 true EP0299170A1 (fr) 1989-01-18

Family

ID=6331165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108186A Withdrawn EP0299170A1 (fr) 1987-07-09 1988-05-21 Fermeture à vis pour un réceptacle

Country Status (2)

Country Link
EP (1) EP0299170A1 (fr)
DE (1) DE3722603C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2008221078B2 (en) * 2007-02-27 2012-07-12 Guala Closures International B.V. Tamper evident closure for containers provided with a threaded neck

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3833945C2 (de) * 1988-10-05 1994-10-20 Alcoa Gmbh Verpackwerke Sicherungsring aus Kunststoff für einen Schraubverschluß für Behälter
GB9005417D0 (en) * 1990-03-10 1990-05-09 Metal Box Plc Screw closures for containers
ES2343442T3 (es) * 2007-01-29 2010-07-30 Guala Closures S.P.A. Anilla de evidencia de manipulacion para cierres metalicos.
AT516972B1 (de) * 2015-04-02 2019-02-15 Red Bull Gmbh Flasche mit einer Verschlusskappe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8231160U1 (de) * 1982-07-23 1983-03-03 Alcoa Deutschland Gmbh Verpackungswerke, 6520 Worms Verschlusskappe insbesondere aus Metall mit einem Kunststoffring
FR2528393A1 (fr) * 1982-06-10 1983-12-16 Stericric Sa Flacon pour liquides apte a supporter une sterilisation terminale, muni d'un dispositif de fermeture inviolable
US4598833A (en) * 1985-08-29 1986-07-08 Kerr Glass Manufacturing Corporation Tamper-evident child-resistant closure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2233305A1 (de) * 1972-07-06 1974-01-31 Bender Werke Gmbh Schraubverschluss mit originalitaetssicherungsring
FR2291915A2 (fr) * 1974-11-19 1976-06-18 Astra Plastique Perfectionnements aux dispositifs d'obturation du type inviolable
DE3206245A1 (de) * 1982-02-20 1983-09-01 Alcoa Deutschland Gmbh Verpackungswerke, 6520 Worms Bausatz fuer einen kappenverschluss
IT8329017V0 (it) * 1983-06-15 1983-06-15 Bormioli Metalplast Spa Capsula inviolabile per bottiglie realizzata in due parti tra di loro assemblabili, perfezionata

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528393A1 (fr) * 1982-06-10 1983-12-16 Stericric Sa Flacon pour liquides apte a supporter une sterilisation terminale, muni d'un dispositif de fermeture inviolable
DE8231160U1 (de) * 1982-07-23 1983-03-03 Alcoa Deutschland Gmbh Verpackungswerke, 6520 Worms Verschlusskappe insbesondere aus Metall mit einem Kunststoffring
US4598833A (en) * 1985-08-29 1986-07-08 Kerr Glass Manufacturing Corporation Tamper-evident child-resistant closure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2008221078B2 (en) * 2007-02-27 2012-07-12 Guala Closures International B.V. Tamper evident closure for containers provided with a threaded neck

Also Published As

Publication number Publication date
DE3722603C1 (de) 1988-07-14

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