EP3774568A1 - Tamper-proof screw cap - Google Patents
Tamper-proof screw capInfo
- Publication number
- EP3774568A1 EP3774568A1 EP19715886.8A EP19715886A EP3774568A1 EP 3774568 A1 EP3774568 A1 EP 3774568A1 EP 19715886 A EP19715886 A EP 19715886A EP 3774568 A1 EP3774568 A1 EP 3774568A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- strip
- tear
- tear strip
- screw
- 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- Withdrawn
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
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3404—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element
- B65D41/3409—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element the tamper element being integrally connected to the closure by means of bridges
-
- 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
- B65D2401/25—Non-metallic tear-off strips
Definitions
- the present invention relates to a plastic screw cap with a top plate and a downwardly extending from the top plate, cylindrical cap skirt having an internal thread, and with a guarantee strip, which is integrally connected to the lower edge of the cap skirt and the with radially inwardly projecting retaining elements provided that define a smallest inner diameter of the guarantee strip in such a way that it can engage behind a retaining ring of larger diameter, which is arranged on a container neck, to remain after separation from the cap shell - if desired - to the container neck.
- the tear line between the guarantee strip and the lower edge of the cap skirt can be designed in different ways. It may, for example, be a deliberately thin-walled section in the cap coat and guarantee strip. Often, however, the connection between the cap skirt and the guarantee strip is completely separated along larger portions of the circumference, the length of these sections being limited by narrow, easily rupturable bridges interrupting the circumferential parting line.
- the tear along a tear line correspondingly weak connection between the cap jacket and warranty strip is therefore relatively easy to tear because when unscrewing the screw, the thread effectively provides a gear ratio analogous to a worm gear, since the thread trace is relatively flat and acting in the circumferential direction torque in a comparatively strong axial force between cap skirt and guarantee strip is implemented.
- the frictional forces between container neck and guarantee strip and thereby caused relative rotation of the cap skirt relative to the guarantee strip shear forces, which facilitate tearing off the cap from the guarantee strip.
- a snap closure which has no screw thread, but is locked only by axial pressure on the container neck, and which consists essentially of a cap with snap edge and a retaining ring, which are pivotally connected to each other via a hinge portion ,
- the retaining ring with a relatively smaller diameter engages behind an annular enlargement with a relatively larger diameter at the container neck and thus holds the closure permanently on the container neck.
- the closure is selectively brought into the closed or in the open position by pivoting the closure cap relative to the retaining ring.
- a connection between retaining ring and cap similar to the tear line between the cap jacket and the guarantee strip in a screw cap is not useful because an average consumer would not be able to tear this compound alone by lifting the cap.
- a tear strip is provided on the snap closure according to DE 10 2006 001 323 between closure cap and retaining ring that over two parallel tear lines on the one hand with the cap and on the other hand connected to the retaining ring and is torn off with a grip tab before opening the cap radially outward, and so the connection between the retaining ring and cap outside the hinge section separates.
- tear lines by a tear-off tear-off tape is carried out in snap closures so mainly for the reason that tear line can be separated by shear forces transverse to the axial direction of the closure easier than by lifting the cap.
- a tear strip which is arranged between the cap casing and the holding ring, and provides an indirect connection between cap casing and holding band, appears. unnecessarily expensive.
- tear-off band indirectly establishes a connection between the cap jacket and the holding band, but is not yet known of screw caps since there is no corresponding need for screw caps to reduce the force required to separate the guarantee band from the cap jacket by providing a tear-off band.
- the closest prior art is considered to be a conventional plastic screw cap with a guarantee band.
- the present invention Compared to this prior art, the present invention, the object of providing a screw cap with the features mentioned above, which excludes the manipulations described above as much as possible and can guarantee even greater security for the container contents.
- This object is achieved in that extends between the trained as a holding and guarantee band lower end portion of the screw cap and the upper part, which is designed as a screw cap, a circumferential tear strip, which each have a tear line on the one hand with the cap jacket and on the other hand with the guarantee band / Tether is connected, wherein the tear strip is configured in such a way and connected to the cap casing and / or the guarantee strip that it deforms as irreversibly when torn off.
- the closure of the invention thus consists of three integrally connected and substantially cylindrical or annular elements namely a screw cap, in turn consisting of a top plate and cap jacket with internal thread, the tear strip and the guarantee strip.
- the screw cap according to the present invention accordingly has a completely circumferential tear-open strip between the cap casing and the guarantee strip, which exclusively establishes the connection between the cap casing and the guarantee strip via two tear lines, and thus completely at least either from the guarantee strip or from the cap casing, or from both is separable, and thus leaves after tearing off a clearly visible and not closable gap between the guarantee strip and cap coat.
- the tear strip thus has a significant share of the warranty function of the screw cap by its presence or absence between the designated as "guarantee strip" lower part of the screw cap and the lower edge of the cap skirt is very clear and in particular even more noticeable than the gap between the guarantee strip and cap jacket , which arises in conventional screw caps after tearing off a directly connected to the lower edge of the cap skirt guarantee strip, but which can also be closed again by moving the separated from the screw cap guarantee strip.
- the gap between the cap coat and the guarantee strip in the closure according to the invention is no longer readily to close by moving the guarantee strip and sticking to the bottom of the cap skirt, as in the usual and coordinated dimensions of Screw cap and container neck of the retaining ring for the guarantee strip at the neck of the container holds the guarantee strip at a distance to the cap jacket.
- the tear strip is therefore connected both to the lower edge of the cap skirt and to the upper edge of the guarantee strip via a tear line, wherein the tear strip at a suitable circumferential position (at one end of the tear strip) has a grip tab and the tear strip along both Tear lines torn open by a radially outward tensile force wholly or partially and, if desired, can be separated from the closure shell.
- the tear strip is not closed in the circumferential direction, but has a free end, which is connected to the grip tab.
- a shearing force can be exerted on the tear lines at points at the transition between an already loosened and a still connected section of the tear strip so that the material tears progressively along the tear line until Finally, the entire tear strip can be removed or remains connected via a residual segment of the circumference with one of the T guarantee strap or screw cap.
- the force to be expended is relatively small and significantly lower than would be required for the axial stretching and tearing of the tear lines simultaneously along the entire circumference.
- the tear strip which in most cases is no longer needed after tearing and is discarded as waste by the consumer, also makes it much more difficult for fraudsters to completely remove the tear strip to restore the closure to the apparent original condition.
- the tear strip being designed in such a way and connected to the cap casing and / or the guarantee strip in such a way that it irreversibly deforms when torn off.
- the irreversible deformation can then no longer be undone, so that even in the attempt to restore the connection between tear strip and cap coat and warranty strip, the deformation of the tear strip provides a clear indication that the closure has been opened once and is no longer in its original condition ,
- the tear strip of one of the closure parts can not be completely separated and, for example, remain connected to a portion of the guarantee strip. Nevertheless, however, the originally one-piece screw cap is so disassembled and in particular the tear strip deformed so that it is not possible to reassemble the parts without this being easily visible.
- An irreversible deformation of the tear strip can be achieved, inter alia, that the tear strip along its circumference of alternately relatively lighter and less easily stretched sections. During tearing, the less easily stretched portions will resist the tearing forces and the more extensible portions will be stretched more.
- the extensibility of at least the slightly stretchable sections is understood adapted to the tear strength of the tear line, so that the force required to tear the tear lines in any case also causes an elongation of the easily stretchable sections.
- the irreversible deformation can be u.a. nor support one or both tear lines in the region of the less easily stretchable sections slightly more resistant than in the region of the easily stretchable sections, which further enhances the difference in elongation. This can be achieved for example by different cross sections of the connection points between easily rupturable bridges between tear strip and cap coat or guarantee strip or by an alternating wall thickness of a circumferential line of weakness.
- Another feature of an embodiment of a closure according to the invention is that the tear strip and / or the guarantee strip have on its inside a toothing, which upon engagement with a corresponding toothing on a container neck rotation of tear strip or guarantee strip together with the screw cap of the closure in Opening direction prevented.
- the gearing makes it difficult to open the closure solely by rotating the screw cap because a plurality of teeth are engaged simultaneously and rotation of the closure cap would require tearing of the tear line simultaneously along its entire circumference.
- the toothing between tear strip and container neck thus forces the consumer to first tear off the tear strip and dispose of it,
- the individual teeth in the region of the tear strip and the guarantee strip may have the same or different circumferential angular distances.
- the consumer should be more or less forced to first close the tear strip Remove before the screw cap can be rotated in the opening direction.
- the tear strip is interrupted along its circumferential direction in the circumferential direction, so that it completely dissolves from the container neck after the closure has been completely opened and, moreover, it already irreversibly deforms during the separation along the tear lines.
- the tear line can be provided in various ways, in particular by forming a tear line or a circumferential interruption with axial webs in the injection molding process or also after injection molding of the closure as a unit with tear tape and tamper evident band, by cutting the connection area between tear strip and cap coat and the guarantee strip , Wherein the connection between the tear strip and the adjacent elements along individual peripheral sections can also be completely separated, so that only individual, easily rupturable webs remain standing.
- a circumferential incision along a tear line can also be at different circumferential positions to a different Depth made to provide easier tearable and less easily tearable sections that support irreversible deformation of the tear strip.
- the tear strip can even seen in the circumferential direction consist of alterna tely relatively light and less easily stretchable sections.
- the alternately relatively lighter and less easily stretched sections may in particular consist of alternately radially thinner and thicker areas of the tear strip.
- the alternately relatively lighter and less easily stretched sections may continue to be measured in the circumferential direction differently, i. has varying width from section to section.
- the extensibility of the tear strip can vary and also this variation of the extensibility, in particular due to different wall thickness of the tear strip can also be limited to one or more peripheral portions, which in turn may have different extent in the circumferential direction. For example, areas of under defenceli cher wall thicknesses of the tear strip along a zigzag line between the tear line for Ga rantieband out and between the tear line to the cap skirt out along the circumference of the tear strip extend.
- One of the free ends of the tear strip may also have a tear tab which can be gripped from the outside to pull off the tear strip along the entire circumference before turning the screw cap to open the closure, thus allowing the closure to open and substantially To be able to accomplish less force, than it would be if the tear lines had to be separated by the rotary motion of the screw cap alone.
- the tear lines could preferably also be designed so tightly that opening the closure without first loosening the tear strip along the entire circumference hardly, that is to say solely by turning the closure cap, would not be possible or only with great difficulty, while shearing off by external forces in that it is relatively easy to grasp the tear lines when gripping a tear tab and moving the tab radially away, because the force to break the tear lines when they are only selectively in the range from an already dissolved to a still connected part of the tear strip and after all along the circumference is applied, much lower than the force required to, for example, when unscrewing the cap, the tear lines virtually simultaneously along the entire circumference to separate.
- the tear strip either from the cap coat or from the guarantee band or both, either by turning the cap or preferably by previously tearing off the tear strip, completely separated.
- the tear strip extends along the entire circumference of the closure, except for an interruption limited to less than 5 ° circumferential angle.
- the tear strip thus has two directly opposite free ends. One of the ends can be provided with a grip tab which covers the other end radially outward.
- the tear strip for example, first be produced by injection molding as a completely circumferentially closed tear strip together with the screw cap and the guarantee strip, wherein after demolding the tear strip is severed by an axial cut shortly before the approach of the grip tab.
- An additional security feature is a hard-to-fake printing of the closure cap, in particular with a print image that extends on the outside of the closure cap over one or both tear lines and thus over the cap skirt, the tear strip and / or the guarantee strip.
- Such a printed image is preferably produced by a laser printer or another, similarly elaborate printing press, which can print curved surfaces of 3-dimensional bodies in such a way that counterfeiting is very difficult.
- the cap skirt may also have an outer gripping ribbing.
- FIG. 1 shows a side view of a closure according to the invention
- FIG. 2 shows a sectional view containing the axis of the closure
- FIG. 3 shows a sectional view of the closure from below along the line VV in FIG. 2.
- FIG. 4 shows the side view of a closure applied to an associated container neck
- FIG. 5 shows a sectional view of the closure applied to a container neck and containing the axis;
- FIG. 7 shows the side view of an associated container neck
- Figure 8 a, b are two sectional views of the tear strip and the adjacent parts in the
- FIG. 9 a, b is a side view and a perspective view of a closure without tear tape on a container neck
- a screw cap 10 with a screw cap 1 which consists of a top plate 2 and a cap casing 3, which in turn is connected via a tear line 8 with a tear strip 7, which has a further tear line 8 'with a Warranty band 5 is connected.
- the screw cap consists of a single plastic part, that is, the screw cap 1 (consisting of cap casing 3 and the top plate 2) is in one piece together with the tear strip 7 and the guarantee strip 5 by injection molding Herge. the material remaining in the region of the tear lines 8, 8 ', if necessary after further processing, establishes the connection between all three parts
- the gripping tab 13 may optionally also have a slightly tearable connection to the other end of the tear strip 7, which is directly opposite to the end provided with the grip tab.
- the tear strip 7 has two directly opposite free ends. For example, it can first be produced as a completely circumferentially closed tear-off strip 3 with the screw cap 1 and the guarantee strip 5 and then be severed by an axial cut shortly before the approach of the grip flap 13.
- the cap casing 3 of the screw cap 1 on its inner side has a thread 4, which may be interrupted by ventilation grooves 4 '
- the tear line 8 is formed in this case by a circumferential parting line, the only easily breakable Bridges 12 is interrupted, which holds the tear strip 7 and the cap shell 3 together.
- the tear line 8 ' is formed by a circumferential dividing line, which is precisely interrupted by easily breakable bridges 12' between tear strip 7 and tether 5.
- the individual bridges 12 'are torn and the tear strip 7 is thus separated from the cap skirt 3 and the guarantee strip 5 and can be removed along the circumference of the screw cap 10 so that thereafter between the cap casing 3 and the guarantee strip 5, a wide gap separates the cap casing 3 from the guarantee strip 5 and no connection between the cap casing and the guarantee strip exists anymore.
- the guarantee strip has in turn on its inside a so-called folded-Flexband 6, which prevents displacement or removal of the guarantee strip 5 upwards in the direction of the cap skirt 3.
- the easily breakable connection along the tear lines 8 and 8 'could therefore be made comparatively stronger than the connection between the guarantee strip and cap jacket in conventional screw caps, since the bridges 12, 12' are torn apart one after the other during radial withdrawal of the tear strip.
- FIG. 4 shows the screw closure 10 applied to a container neck 20 and FIGS. 5 and 6 show the screw closure 10 applied to the container neck 20 in a section containing the axis of the closure or in a section perpendicular to this axis.
- FIG. 5 shows that the distance between the tamper-evident band and the lower edge of the cap is initially bridged by the tear-off band, but that this distance can not be appreciably reduced after removal of the tear-off band 7, because the retaining ring 25 only adjoins the circumference of the container neck low axial play of the guarantee strip 5 allows.
- a special feature of this container neck 20 is to provide a matching counter teeth 19 to the teeth 9 on the inside of the tear strip 7, the rotation of the tear strip 7 in the opening direction together with the screw cap. 1 prevented.
- the retaining ring 25 is located below this counter-toothing 19 at a distance from the upper opening edge of the container neck, which is as usual slightly smaller than the clear distance between the inside of the top plate and the top of retaining elements on the guarantee band, which engage with the underside of the retaining ring, so that Guarantee tape 5 of the screw cap 10 has only a small axial play of movement, this is also necessary with conventional closures to prevent easy access from the outside to the guarantee strip, which would allow manipulation of the screw cap.
- Figure 8 shows two sectional views through the region of a tear strip 7 in each axis containing cutting planes, but at different circumferential positions 7 ', 7 "of the tear strip 7. It can be seen in section respectively the tear strip 7 and the two tear lines 8 and 8', the form the transition on the one hand to the cap casing 3 and on the other hand to the guarantee strip 5. As you can see, the cross sections of the tear strip 7 at the different circumferential positions differ significantly from each other and also the immediately adjacent portions of the cap skirt 3 and the guarantee strip 5 are adapted in terms of thickness and position to the respective course of the cross section of the tear strip 7.
- the tear strip 7 when torn off from the closure cap, deforms more or less depending on the local cross section, whereby the adjacent sections of cap casing and guarantee strip 5 are also at least partially affected.
- the tear strip 7 can be configured so that it When tearing off the tear strip forces occurring clearly visible and irreversibly deformed. It is then practically impossible to place a tear-off strip once it has been torn off again on a closure and to connect it to the cap casing 3 and the guarantee strip 5, without this manipulation being easily recognizable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018108491.9A DE102018108491A1 (en) | 2018-04-10 | 2018-04-10 | Counterfeit-proof screw cap |
PCT/EP2019/058262 WO2019197214A1 (en) | 2018-04-10 | 2019-04-02 | Tamper-proof screw cap |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3774568A1 true EP3774568A1 (en) | 2021-02-17 |
Family
ID=66049209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19715886.8A Withdrawn EP3774568A1 (en) | 2018-04-10 | 2019-04-02 | Tamper-proof screw cap |
Country Status (6)
Country | Link |
---|---|
US (1) | US20210024258A1 (en) |
EP (1) | EP3774568A1 (en) |
CN (1) | CN111954630A (en) |
BR (1) | BR112020017783A2 (en) |
DE (1) | DE102018108491A1 (en) |
WO (1) | WO2019197214A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020119383A1 (en) * | 2020-07-22 | 2022-01-27 | Contexo Gmbh | Device for manufacturing a closure cap |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1863909U (en) * | 1962-10-18 | 1962-12-13 | Hans Rohrbeck | PLASTIC PLASTIC CLOSURE FOR BOTTLES, TUBES, CANS AND THE LIKE. WITH A Beaded RING. |
GB1598303A (en) * | 1977-12-14 | 1981-09-16 | Strollcroft Ltd Abley M B | Closure cap |
EP0050490B1 (en) * | 1980-10-17 | 1986-08-27 | U.G. CLOSURES & PLASTICS LIMITED | Sterile pack |
EP0056730B1 (en) * | 1981-01-20 | 1985-10-30 | Johnsen & Jorgensen (Plastics) Limited | Improved container assembly |
DE8520754U1 (en) * | 1985-07-18 | 1985-08-29 | Tubex GmbH Tuben- und Metallwarenfabrik, 7451 Rangendingen | Can |
US4738375A (en) * | 1986-08-19 | 1988-04-19 | Rockwell Valve Corporation | Tamper resistant and tamper indicating closure |
JP2557434B2 (en) * | 1986-09-24 | 1996-11-27 | アルプラスト・ソシエタ・ペル・アチオーニ | Tamper-evidence lid |
GB8817365D0 (en) * | 1988-07-21 | 1988-08-24 | Metal Closures Ltd | Container closure |
GB2236099A (en) * | 1989-09-07 | 1991-03-27 | Metal Box Plc | Containers |
US5307946A (en) * | 1993-03-24 | 1994-05-03 | Northern Engineering & Plastics, Corp. | Neck finish for a container and a matching registering multiple thread pattern in a flexible cap for engagement on neck said finish |
GB2304337B (en) * | 1993-03-24 | 1997-10-29 | Northern Eng & Plastics | Container neck and multiple thread tamper evident flexible cap |
US5711443A (en) * | 1993-11-24 | 1998-01-27 | Bennett; Paul H. | Tamper-evident container closure |
DE10318454B4 (en) * | 2002-04-23 | 2005-02-03 | Kunststoff-Technik Helmstedt Gmbh | Screw cap for containers |
US7303088B2 (en) * | 2005-03-11 | 2007-12-04 | Berry Plastics Corporation | Tamper-evident closure |
DE102006001323A1 (en) | 2006-01-09 | 2007-07-12 | Bericap Gmbh & Co. Kg | Cap with snap hinge and retaining ring |
US20080078736A1 (en) * | 2006-09-29 | 2008-04-03 | Clayton Corporation | Tamper evident cover for an aerosol can |
GB0620483D0 (en) * | 2006-10-17 | 2006-11-22 | Martin Peter J | The re:tie |
DE102010001120A1 (en) * | 2010-01-22 | 2011-07-28 | Bericap GmbH & Co. KG, 55257 | Printed container closure and method of printing the same |
-
2018
- 2018-04-10 DE DE102018108491.9A patent/DE102018108491A1/en not_active Withdrawn
-
2019
- 2019-04-02 CN CN201980025018.8A patent/CN111954630A/en not_active Withdrawn
- 2019-04-02 BR BR112020017783-0A patent/BR112020017783A2/en not_active IP Right Cessation
- 2019-04-02 WO PCT/EP2019/058262 patent/WO2019197214A1/en unknown
- 2019-04-02 US US17/042,295 patent/US20210024258A1/en not_active Abandoned
- 2019-04-02 EP EP19715886.8A patent/EP3774568A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
BR112020017783A2 (en) | 2020-12-22 |
WO2019197214A1 (en) | 2019-10-17 |
US20210024258A1 (en) | 2021-01-28 |
DE102018108491A1 (en) | 2019-10-10 |
CN111954630A (en) | 2020-11-17 |
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