EP2276675B1 - Capuchon vissé - Google Patents

Capuchon vissé Download PDF

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Publication number
EP2276675B1
EP2276675B1 EP09722270.7A EP09722270A EP2276675B1 EP 2276675 B1 EP2276675 B1 EP 2276675B1 EP 09722270 A EP09722270 A EP 09722270A EP 2276675 B1 EP2276675 B1 EP 2276675B1
Authority
EP
European Patent Office
Prior art keywords
section
cross
thread
screw cap
flank
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.)
Not-in-force
Application number
EP09722270.7A
Other languages
German (de)
English (en)
Other versions
EP2276675A2 (fr
Inventor
Klaus Bereuter
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.)
Z-Werkzeugbau-Gmbh
Original Assignee
Z-Werkzeugbau-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 Z-Werkzeugbau-Gmbh filed Critical Z-Werkzeugbau-Gmbh
Publication of EP2276675A2 publication Critical patent/EP2276675A2/fr
Application granted granted Critical
Publication of EP2276675B1 publication Critical patent/EP2276675B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
    • B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges

Definitions

  • the invention relates to a screw cap produced by plastic injection molding with a cap base, a cap wall and a cap opening, wherein on the cap wall, an internal thread with at least one thread is formed, wherein further the thread is formed over its length with different cross-section, and, starting at the Cap opening, extending over 360 ° or more.
  • screw caps complex requirements are made. They are applied by machine to bottles, so they should be easy to handle in terms of the required forces. Often, such screw caps are also connected to a guarantee strip. In the course of unscrewing an effective separation of the guarantee band should be made. In addition, they should as possible safely on the containers such as bottles in particular can be applied. Last but not least, they should be easy to handle by the consumer.
  • an object is to provide a manufactured in plastic injection molding screw cap that meets as much as possible the complex requirements that are placed on such screw caps in machine application and in the consumer application.
  • the thread over a length starting corresponding to a circumferential angle of 120 ° or more, seen from the cap opening (4, 4 ') starting, a second cross-section (Q 2 ), which is larger in area than the first cross section (Q 1 ), which first cross section (Q 1 ) over a length corresponding to 50 ° or more, starting at the cap opening (4,4 ') is formed, that the flanks of the second cross section with a horizontal (H) different angles ( ⁇ 5, ⁇ 6) include that the cap opening (4,4 ') facing edge of the second cross section (Q 2 ) (lower edge) a larger angle ( ⁇ 6) with the horizontal (H) includes as the flank facing the cap bottom (upper flank) and that the first cross-section (Q 1 ) has a lower flank angle ( ⁇ 1) which includes a smaller angle with a horizontal than the upper flank W Inlet ( ⁇ 2) of the first cross section (Q 1 ).
  • this measure also gives "grip" in the screwing motion, which is favorable, for example, with regard to a maximum torque that can be adjusted thereafter.
  • the flanks of the second cross-section close with the horizontal different angles. They are formed asymmetrically with respect to the horizontal. So can be adjusted specifically to the vote on the mating thread.
  • the edge facing the cap opening may be between 30 and 60 °, preferably at 50 °.
  • the angle of the upper flank can be between 20 and 35 °, preferably 25 °.
  • the first cross section has a lower flank angle which includes a smaller angle with the horizontal than the upper flank angle of the first cross section.
  • the second cross section is given only after 90 ° -200 ° or more. Ie preferably about half a turn or a little more when screwing another cross-section (initially alone) with mating thread engaged.
  • the lower flank angle of the first cross section is preferably between 0 ° and 20 °, more preferably at 5 °.
  • the first cross section extends over 50 ° to 100 ° or more. Preferably even over 120 °. The latter in any case, if, as explained below, a segmentation of the thread is provided and this peripheral portion corresponds to a segment. Should a segment be chosen to be larger, the first cross section mentioned is preferably also selected over a longer section.
  • a third cross section is formed between the first and the second cross-section.
  • This third cross-section preferably corresponds to the "standard" cross section customary so far for screw caps. It is preferred in this case that the third cross section has flanks with the same flank angles relative to a horizontal.
  • the flank angle of the third cross-section is in detail preferably between 20 ° and 35 °, more preferably at 25 °.
  • the second cross section is followed by a section corresponding to the third cross section, that is to say a section corresponding to the standard cross section.
  • the thread is divided into individual segments.
  • the interspaces thus provided are used in a known manner to allow overpressure reduction in the course of unscrewing or screwing the screw cap.
  • a segment may preferably extend over 100 ° to 140 °, more preferably over 120 °.
  • a segment is formed in each case according to a first, second or third cross-section. In this case, however, it is not excluded, although preferably not provided, for a segment outside one or more of the areas defined above to have yet another cross-sectional shape.
  • the invention also provides a screw cap produced by a plastic injection molding method with a cap base, a cap wall and a cap opening, where n the cap wall is an internal thread with one or more threads, wherein further the screw cap is formed opening side with a tamper-evident ring, the tamper evident ring inwardly Blocking cam and has a blocking cam two circumferentially adjacent bumps or the blocking cam is formed in the circumferential direction as a blocking rib.
  • the invention has the object to form such a screw cap with tamper evident ring.
  • the bumps have a different height in relation to an extension inwards or the blocking rib has over its extension at least two regions which differ in terms of their extent inwards.
  • the bumps or ribs are used in the course of unscrewing, at a corresponding radial projection of the associated mouth, such as a bottle to come to rest and be prevented by this concern then in a further vertical movement, whereupon the tearing takes place.
  • this attack must first be overcome in the course of unscrewing.
  • the cam has different distances in the starting area to a plane forming the cap opening such that one of the bumps or one of the rib sections starts closer to the opening plane than the other.
  • the individual cams provided in the circumferential direction are thus again formed at different distances from the cap opening. This can be a stepwise offset or a skew be. This results in a favorable influence on the required torque when screwing.
  • the desired interaction with the counter-projection when unscrewing results, since the interaction with the bottle-side projection, which leads to the tearing off of the closure ring for unscrewing the guarantee ring, with respect to all humps on the same level.
  • the bump or rib portion of greater height begins closer to the opening plane.
  • this does not mean that at the beginning of unscrewing necessarily a higher torque is required immediately.
  • the wedge angle is the same in each case, which is accompanied by the fact that the humps starting closer to the cap opening extend further radially inward than the other humps
  • a screw cap 1 produced by plastic injection molding with a cap base 2 and a cap wall 3. Opposite to the cap base 2 is a cap opening 4, or, if one includes the guarantee strip, 4 ', see. FIG. 2 , educated.
  • an internal thread 5 is formed, which in the embodiment has a (single) continuous, although, as described below, divided into segments, thread.
  • the thread is formed over its length, that is different in the embodiment depending on the segment or a number of multiple segments, with different cross-section. This is in particular on the Figures 2 and 3 to refer.
  • the thread initially starts with a section a (see FIG. FIG. 3 ), which in the embodiment corresponds to a first segment of the thread, which region a has a first cross-section.
  • This first cross-section Q1 is in FIG. 2 to recognize, but also in FIG. 3 shown separately again.
  • FIG. 3 shows a development of the thread, with, for clarity, exaggerated slope or pitch (angle ⁇ ).
  • angle ⁇ for the pitch is about 2 °.
  • the cross sections of the thread or the segments are basically each V-shaped, with a rounded merge at the V-tip, which points radially inward. Also at the V-ends are rounded, viewed from the inside of the cap, concave curves resulting outlets of V-flanks.
  • the cross section Q1 has a flank angle ⁇ 1 with respect to its lower flank F1, which is comparatively small.
  • the flank angle ⁇ 1 is about 5 ° - 5.5 °.
  • This comparatively small flank angle, which the flank encloses with the horizontal H, leads to an approximately horizontal course of the outer surface of the lower flank of the cross section Q1. Since this region of the thread when screwing first comes into contact with the mating thread on the bottle mouth, for example, this has a favorable effect with regard to a possible tilt-free placement of the screw cap on the thread.
  • the upper flank angle of the cross section Q1 includes with the horizontal one of the flank angle ⁇ 1 preferably different, larger flank angle ⁇ 2.
  • the flank angle ⁇ 2 is about 28 ° - 29 °.
  • a second section b As seen in the circumferential direction of the cap wall 3, which is referred to in the present description in each case in the circumferential degree numbers, closes after about 120 °, a second section b.
  • the second section b is given by a practically (so far for a total thread turn) usual third cross-sectional profile Q3, wherein also here with respect to a horizontal H flank angle ⁇ 3 and ⁇ 4 are given.
  • the flank angles ⁇ 3 and ⁇ 4 are chosen differently in the exemplary embodiment in the region of the section b. You can also choose the same. They are at 20 ° - 21 ° ( ⁇ 3) and 35 ° - 36 ° ( ⁇ 4).
  • a thread region c follows, which is formed in the embodiment by three individual segments.
  • a second profile Q2 is formed, which is characterized by an area comparatively large profile. In the exemplary embodiment, it is larger in area than the profile Q1 and also preferably larger in area than profile Q3.
  • the profile Q2 is characterized in that two further flank angles ⁇ 5 and ⁇ 6 are formed, where ⁇ 5 is the upper flank angle and ⁇ 6 is the lower flank angle, which preferably differ from one another.
  • the lower flank angle ⁇ 6 is preferably selected larger than the upper flank angle ⁇ 5.
  • ⁇ 6 is about 46 ° -47 ° and ⁇ 5 is about 28 ° -29 °.
  • this region c extends over three segments, that is to say over 360 °, approximately the circumference of the cap wall, meaning just one complete revolution. Due to the large area selected cross-section and also by the aforementioned asymmetry, a good clawing with the mating thread can be achieved in this area. By this over an entire circumferential length extending portion c ensures that the entire cap when unscrewing the screw pitch also immediately implemented in tear height with respect to an example molded guarantee ring. The design is also important without the guarantee ring.
  • the area c is adjoined by an end area d.
  • the end region d is formed in the embodiment by a segment, which corresponds here to a circumferential extent of about 120 °.
  • the segment of the region d in each case has a cross section Q3, as already explained.
  • angles ⁇ 1 etc. were determined in such a way that straight flank areas extending in cross-section were lengthened graphically, up to an intersection point. Through this point of intersection then the horizontal H is placed.
  • the illustrated screw cap is further characterized by the molded-on tamper evident ring 6.
  • the tamper-evident ring 6 is sprayed in the usual way via tear-off webs 6 of the same material with the screw cap 1.
  • the tamper-evident ring 6 has inwardly projecting blocking cams 7, wherein a blocking cam 7 is composed in detail of two cusps 8, 9 formed in the circumferential direction next to each other. These humps 8,9 go over a sidecut 10 into each other.
  • the humps 8, 9 have a different height, ie a different extent radially inward in the direction of arrow P in FIG. 2 , In principle, a larger deformation is therefore required in the region of a hump 8 when screwing the screw cap over a corresponding counter-projection on the bottle or container mouth than in the hump 9 of the embodiment.
  • the actual extent of a bump radially inward is between 0.3-0.5 mm (smaller bump) and 0.6-0.9 mm (larger bump).
  • the bumps 8, 9 have different distances x and y to a plane forming the cap opening.
  • the hump 8 begins on the other hand, the areas that are most radially inward are basically preferably located on a plane E, so that the further projection in the sense of a wedge formation, as shown, starting from the Plane E a smaller wedge angle or - at different extent radially inward - a smaller wedge length with respect to the hump 8 results as compared with the hump 9. Insofar a balance in terms of the necessary Aufschraub structure is reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (12)

  1. Capuchon à visser (1) réalisé dans un procédé de moulage par injection de matière plastique, comportant un fond (2) de capuchon, une paroi (3) de capuchon et une ouverture (4, 4') de capuchon, un filetage intérieur (5) avec, en tout cas, un pas de vis étant réalisé sur la paroi (3) de capuchon, en outre, le pas de vis étant réalisé sur toute sa longueur avec des sections transversales (Q1, Q2, Q3) différentes, et s'étendant sur 360° ou plus en commençant à l'ouverture de capuchon, caractérisé en ce que le pas de vis, sur une longueur commençant conformément à un angle inscrit de 120° ou plus considéré à partir de l'ouverture (4, 4') de capuchon, comporte une deuxième section transversale (Q2) dont la surface est supérieure à celle de la première section transversale (Q1), laquelle première section transversale (Q1) est réalisée sur une longueur correspondant à 50° ou plus en partant de l'ouverture (4, 4') de capuchon, en ce que les flancs de la deuxième section transversale forment avec une horizontale (H) des angles (α5, α6) différents, en ce que les flancs de la deuxième section transversale (Q2), orientés vers l'ouverture (4, 4') de capuchon (flancs inférieurs), forment avec l'horizontale (H) un angle (α6) supérieur à celui formé par les flancs orientés vers le fond de capuchon (flancs supérieurs), et en ce que la première section transversale (Q1) comporte un angle de flanc inférieur (α1) qui forme avec une horizontale un angle inférieur à celui formé par l'angle de flanc supérieur (α2) de la première section transversale (Q1).
  2. Capuchon à visser selon la revendication 1, caractérisé en ce que la deuxième section transversale (Q2) est définie seulement après 90° ou plus.
  3. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce que l'angle (α6) des flancs inférieurs de la deuxième section transversale (Q2) se situe entre 30° et 60° et/ou en ce que l'angle (α5) des flancs supérieurs se situe entre 20° et 35°.
  4. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce que l'angle de flanc inférieur de la première section transversale (Q1) se situe entre 0° et 20°.
  5. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce que la première section transversale (Q1) s'étend sur 50° à 100° ou plus.
  6. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce qu'une troisième section transversale (Q3) est formée entre la première et la deuxième section transversale (Q1, Q2).
  7. Capuchon à visser selon la revendication 6, caractérisé en ce que la troisième section transversale (Q3) possède des flancs avec des angles de flanc (3α', α3") identiques par rapport à une horizontale (H).
  8. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce que l'angle de flanc (α3, α4) de la troisième section transversale (Q3) se situe entre 20° et 95°.
  9. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce qu'une partie correspondant à la troisième section transversale (Q3) est formée dans le prolongement de la deuxième section transversale (Q2).
  10. Capuchon à visser selon l'une des revendications précédentes, caractérisé en ce que le pas de vis (17) est divisé en segments individuels.
  11. Capuchon à visser selon la revendication 10, caractérisé en ce qu'un segment s'étend sur 100° à 140°.
  12. Capuchon à visser selon la revendication 11, caractérisé en ce qu'un segment est réalisé dans chaque cas conformément à une première, une deuxième ou une troisième section transversale (Q1, Q2, Q3).
EP09722270.7A 2008-03-19 2009-03-12 Capuchon vissé Not-in-force EP2276675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810014952 DE102008014952A1 (de) 2008-03-19 2008-03-19 Schraubkappe
PCT/EP2009/052901 WO2009115443A2 (fr) 2008-03-19 2009-03-12 Capuchon vissé

Publications (2)

Publication Number Publication Date
EP2276675A2 EP2276675A2 (fr) 2011-01-26
EP2276675B1 true EP2276675B1 (fr) 2015-02-25

Family

ID=40801851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09722270.7A Not-in-force EP2276675B1 (fr) 2008-03-19 2009-03-12 Capuchon vissé

Country Status (3)

Country Link
EP (1) EP2276675B1 (fr)
DE (1) DE102008014952A1 (fr)
WO (1) WO2009115443A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009044896B3 (de) * 2009-12-15 2011-05-26 Kunststofftechnik Waidhofen An Der Thaya Gmbh Verschlusskappe zum Verschließen eines Behältnisses
DE102010038854A1 (de) * 2010-08-03 2012-02-09 Bericap Holding Gmbh Schraubverschluss mit verbessertem Gewinde
US9254941B2 (en) 2014-03-25 2016-02-09 Basf Corporation Resealable container and closure package
DE102015111245A1 (de) * 2015-07-10 2017-01-12 Bericap Holding Gmbh Verschlusskappe mit optimiertem Innengewinde
CH716855A2 (de) 2019-11-20 2021-05-31 Alpla Werke Alwin Lehner Gmbh & Co Kg Behälterverschluss.
DE102022112981A1 (de) 2022-05-23 2023-11-23 Bericap Holding Gmbh Verschlusselement zum Verringern und Festhalten von Flüssigkeitsrückständen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH226897A (de) * 1942-08-01 1943-05-15 Wagner Guenter Flaschen-Verschlusskappe.
US4147268A (en) 1976-09-24 1979-04-03 Patel Chandrakant S Pilfer-proof closure for containers
DE8408411U1 (de) * 1984-03-20 1984-04-26 Schmalbach-Lubeca AG, 3300 Braunschweig Schraubkappe aus Kunststoff als Spritzgussteil
DE4126418C2 (de) * 1991-08-09 2002-08-29 Michael Hertrampf Schraubkappe zum Verschließen einer Flasche oder dergleichen
US6123212A (en) 1999-08-27 2000-09-26 Alcoa Closure Systems International Plastic closure with rotation-inhibiting projections
DE20120965U1 (de) 2001-12-27 2002-03-21 Georg Menshen Gmbh & Co Kg Originalitätsverschluss

Also Published As

Publication number Publication date
WO2009115443A3 (fr) 2009-12-10
DE102008014952A1 (de) 2009-09-24
WO2009115443A2 (fr) 2009-09-24
EP2276675A2 (fr) 2011-01-26

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