CA2041078A1 - Screw cap with a guarantee strip which is expandable when being screwed on for the first time - Google Patents
Screw cap with a guarantee strip which is expandable when being screwed on for the first timeInfo
- Publication number
- CA2041078A1 CA2041078A1 CA002041078A CA2041078A CA2041078A1 CA 2041078 A1 CA2041078 A1 CA 2041078A1 CA 002041078 A CA002041078 A CA 002041078A CA 2041078 A CA2041078 A CA 2041078A CA 2041078 A1 CA2041078 A1 CA 2041078A1
- Authority
- CA
- Canada
- Prior art keywords
- guarantee strip
- screw cap
- cap according
- breakage point
- exhibits
- 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.)
- Abandoned
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
- B65D41/3442—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
-
- 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
- B65D2401/30—Tamper-ring remaining connected to closure after initial removal
-
- 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
- B65D2401/35—Vertical or axial lines of weakness
Abstract
Abstract The guarantee strip (3) of the screw cap (1) possesses a nominal breakage point (11) at which the guarantee strip is able to be separated though its entire width. A preferably window shaped relief opening (12) is arranged near to the nominal breakage point which improves the expandability of the guarantee strip when the cap is being screwed on for the first time. The nominal breakage point comprises at least two material ribs, of which a lower is arranged at the lower edge of the screw cap. When screwing off for the first time, a flow of forces is achieved in the guarantee strip, during which the relief openings are no longer effective.
(Figure 2)
(Figure 2)
Description
PCC012/15.03.91 Crown Cork AG, CH-4153 Reinach Screw cap ~ith a guarantee strip which is expandable when being screwed on for the first time.
~he invention concerns a screw cap made of plastic for closure of a container opening according to the preamble of Claim 1. These types of screw caps have a guarantee function, in that a first time unscrewing of the cap is displayed by tearing of the guarantee strip. Screw caps of this type have been known and in use for a long time, especially in the area of soft drinks.
A problem with known caps is, in particular, that during closure of the container opening the guarantee strip must be somewhat expanded in order that the retention element can be pushed over the bead on the bottle opening. Since, at the same time, the screw cap carries out a rotating movement, there is thereby the danger that the nominal breakage point will already tear, or will remain deformed in such a way that the guarantee strip can no longer fulfil its function. On the other hand, the nominal breakage point must be so dimensioned that screwing off of the cap for the first time is possible without excessive exertion of force.
It is therefore a purpose of the invention to create a screw cap of the type mentioned in the introduction with which the guarantee strip can expand on closure of the container opening without damage to the nominal breakage point, whereby the guarantee function will not be adversely effected when unscrewing for the first time. According to the invention, this purpose is fulfilled with a screw cap which exhibits the features of Claim 1.
~he invention concerns a screw cap made of plastic for closure of a container opening according to the preamble of Claim 1. These types of screw caps have a guarantee function, in that a first time unscrewing of the cap is displayed by tearing of the guarantee strip. Screw caps of this type have been known and in use for a long time, especially in the area of soft drinks.
A problem with known caps is, in particular, that during closure of the container opening the guarantee strip must be somewhat expanded in order that the retention element can be pushed over the bead on the bottle opening. Since, at the same time, the screw cap carries out a rotating movement, there is thereby the danger that the nominal breakage point will already tear, or will remain deformed in such a way that the guarantee strip can no longer fulfil its function. On the other hand, the nominal breakage point must be so dimensioned that screwing off of the cap for the first time is possible without excessive exertion of force.
It is therefore a purpose of the invention to create a screw cap of the type mentioned in the introduction with which the guarantee strip can expand on closure of the container opening without damage to the nominal breakage point, whereby the guarantee function will not be adversely effected when unscrewing for the first time. According to the invention, this purpose is fulfilled with a screw cap which exhibits the features of Claim 1.
2 ~
The invention is based on the knowledge that the forces exerted when screwing on for the first time are not the same as when unscrewing for the first time. The relief aperture, when screwing on for the first time, now causes the guarantee strip to be able to expand circumferentially in a particularly advantageous way r without the material ribs on the nominal breakage point being endangered. On the other hand, when unscrewing, the lower material rib at the nominal breakage point causes a progression of forces which in practice does not affect the relief aperture, and thus causes expansion of the guarantee strip to occur to much less a degree than when screwing on for the first time. This has the result that the guarantee strip does actually tear, and thus displays first tLme unscrewing.
The relief aperture can, according to the type of application, exhibit entirely differing forms. It can, for example, take the form of an approximately vertical slit, open towards the lower edge of the guarantee strip, which extends through a part of the guarantee strip~ The relief aperture can, however, also be formed as a window which is arranged at a distance from the lower edge o~ the guarantee strip. With that, the lower edge of the guarantee strip remains uninterrupted over its entire circumference, which can improve the guarantee function~ The window can be formed approximately as a rectangle, but could also be polygonal, round or exhibit another configuration. In certain cases the arrangement of numerous neighbouring relief openings would also be conceivable.
It is of particular advantage if the guarantee strip exhibits a section on its circumference on which it i5 connected coherently with the lower edge of the cap, and if it exhibits a complementary section on which it is connected to the lower edge of the cap by ribs which are able to tear off, whereby the nominal breakage point is arranged on one or each of the two bordering regions between the sections. With that, the relief aperture is preferably arranged in a section of the circumference which is relatively firmly connected to the cap. If the guarantee strip exhibits a strengthened retention element on the inner side of the complementary section, for example in the form of a bead, when unscrewing, the ribs between the guarantee strip and the cap will tear first, while the lower material rib of the nominal breakage point will still hold. In the process of the further unscrewing procedure, the lower material rib will also tear without any appreciable expansion taking place at the same time. The material ribs can run parallel or inclined to the direction of the circumference of the guarantee strip. In particular, good results can also achieved with two neighbouring relief openings.
Further individual features and advantages arise out of the following description of an embodiment and out of the drawings. Namely:
Figure 1 A view of a container opening and a cap with torn guarantee strip after unscrewing, Figure 2 a very enlarged cross section through a screw cap according to the invention, Figure 3 a still more enlarged cross section through the nominal breakage point along the line I-l, Figure 4 a cross section through the nominal breakage point along the line II-II, Figure 5 a view of the screw cap from below, according to figure 2, Figure 6 a plan view from above onto the nominal breakage point, with the relief aperture before the cap has been screwed on, respectively with engaged guarantee strip before unscrewing, Figure 7 the nominal breakage point according to figure 6 at closure of the container opening, Figure 8 the nominal breakage point according to figure 6 in its first stage, when screwing off for the first time, Figure 9 The nominal breakage point according to figure 8 at a further stage, with torn upper material rib, Figure 10 a modified embodiment with slit shaped relief aperkure, and Figure 11 a further embodiment with two neighbouring relief apertures.
Figure 1 shows a plastic sGrew cap 1 with an inside thread 5 which serves as a closure for a conkainer opening 2 with an outside thread 6. These types of caps are prefered as a closure for fresh drinks bottles, whereby, as a rule, reuseable glass bottles with a standardised bottle opening are employed. However, disposable glass or plastic bottles can also be used. As opposed to disposable plastic bottles, it is, with that, of greater significance that the guarantee strip 3 does not remain beneath the bead 4, since this would mean increased additional effort when cleansing the bottles.
The recycling of plastic bottles is also facilitated. For this reason, the guarantee strip exhibits a nominal breakage point 11 throuqh its circumference, which has the effect that the guarantee strip can be removed from the bottle opening and preferably remains attached to the screw cap~ A thin film connection 22 for the tearable connection with the rest of the cap is also conceivable, however.
The guarantee strip 3 comprises a circumferential section 9 which is relatively firmly connected to the lower edge of the screw cap and a complementary section 10 which is able to tear away ~rom the cap, respectively is not firmly connected to the cap. On the inner side 7 of the guarantee strip, preferably on the complementary section 10, a retention element is arranged in the form of a bead 8 which, when screwing on the cap for the first time, snaps under the bead 4 on the container opening 2 and causes the necessary tension in order to tear the guarantee strip when unscrewing for the first time~
Details of the screw cap are more closeLy described in figures 2 to 5. An inner seal 16 is arranged on the base of the cap 15 which engages with the container opening. In the place of this type of seal, the screw cap could be provided with an seal insert. The cap side wall 17 is preferably provided with a knurl to increase the grip.
The guarantee strip 3 is connected with the lower edge 18 of the cap in the region of the complementar~ section 10 by ribs 20. A strengthened bead 8, which serves as a retention element, is also arranged on this complementary section. It can be seen in figure 5 that the bead ~ extends through an approximate angle of ~ and, with that, blends at both ends into an engaging edge 21 which is arranged on the section of the circumference which is firmly connected to cap edge.
r~
The nominal breakage point 11 lies in the bordering area between both the sections 9 and lO. It is formed by an upper material rib 13 and a lower material rib 14, which is arranged on the lower edge l9 of the guarantee strip. As can be seen in figures 3 and 4, both the material ribs 13 and 14 are, in cross section, displaced ver~ically to one another and indeed in such a way that the inner wall of the upper material rib 13 exhibits approximately the same diameter as the outer wall of the lower material web 14. This arrangement facilitates ejection of the closure cap from the injection molding tool without damage to the material ribs 13 and 14 occuring at the same time. The guarantee strip runs, in the complementary section 10, approximately wedge shaped along its upper edge in a known way, which likewise serves to provide better deformability when exiting the tool. In the circumferential area 9I the guarantee strip is relatively firmly connected to the lower edge 18 of the cap, which is particularly visible on the right side of figure 2.
The window shaped relief apertures 12 coul~ be formed in a similar way to the intermediate space between the material ribs 13 and 14. With a total height of the guarantee strip of approx. 5 mm, the relief aperture evidently possesses a very small dimension. The optimum arrangement and configuration of the relief aperture, in particular its relative position to the nominal breakage point 11, are dependent upon different parameters. Thereby, the elasticity of the material, the dimensions of the nominal breakage points and the wall thickness of the guarantee strip all play an essential part.
Figures 6 to 9 show the action of the relief aperture at different stages. Figure 6 shows the guarantee strip in an unloaded condition, in particular before the cap is screwed on for the first time. The material ribs 13 and 14 of the nominal breakage point are free of tension and the window $
shaped relief aperture 12 runs rectangulary, without distortion.
During closure of the container opening, the cap is turned in the direction of rotation a. With that, the bead 8, on the inner side of the guarantee strip, slips over the surrounding bead 4 of the container opening, which obviously causes an expansion of the guarantee strip in the direction of its circumference. The expansion involves the material ribs 13 and 14 as well, which thereby are somewhat deformed. The expandability isV however, increased through the relief aperture, which itself likewise expands at the same time, as can be observed in figure 7. After engagement of the retention element 8 beneath the bead 4, the guarantee strip assumes again the tension ree position, as is shown in figure 6.
When unscrewing the cap for the first time, this is turned in the opposite direction, as shown by the arrow b. Since the retention element 8 is no longer able to slip over the bead 4, the ribs 20 on the complementary section 10 will tear. The nominal breakage point is, at this stage of unscrewing, indeed submitted to greater expansion, as can be seen in figure 8, however the two material strips 13 and 14 are not yet torn. Starting at the end of the retention element 8, different lines of force c run on the one hand in the direction of the circumference and on the other hand inclined against the lower edge 18 of the cap, however without the relief apertures 12 at the same time being affected. These forces can thus cause no appreciable expansion, so that the tensile forces are fully effective on the nominal breakage points.
Figure 9 shows a further stage of the unscrewing procedure, with which the upper material rib 13 is already torn. The complementary section 10 now assumes an even greater angle to the lower cap edge 18, respectively to the section of the circumference 9 which is firmly connected to the cap edge.
The lines of force now run only through the lower material rib 14 and indeed likewise inclined in such a way that the relief aperture will not be adversely affected on completion of the tearing off procedure. Further expansion of the screw cap in the direction of unscrewing b will also cause tearing of the lower material rib 14 so that the condition shown in figure 1 is reached.
Figure 10 shows a modified embodiment of the invention with a relief opening in the form of a slit 22 which is open below.
The effect is similar to the window shaped relief aperture, whereby, naturally, the flow of forces in the direction of the circumference at the lower edge of the guarantee strip is interrupted by the slit 22.
Finally, figure 11 shows one more variation with two relief apertures 12 and 12', which are formed as upright rectangles.
Further relief apertures could be arranged on the fixed section of the circumference 9, in particular on its other end.
The invention is based on the knowledge that the forces exerted when screwing on for the first time are not the same as when unscrewing for the first time. The relief aperture, when screwing on for the first time, now causes the guarantee strip to be able to expand circumferentially in a particularly advantageous way r without the material ribs on the nominal breakage point being endangered. On the other hand, when unscrewing, the lower material rib at the nominal breakage point causes a progression of forces which in practice does not affect the relief aperture, and thus causes expansion of the guarantee strip to occur to much less a degree than when screwing on for the first time. This has the result that the guarantee strip does actually tear, and thus displays first tLme unscrewing.
The relief aperture can, according to the type of application, exhibit entirely differing forms. It can, for example, take the form of an approximately vertical slit, open towards the lower edge of the guarantee strip, which extends through a part of the guarantee strip~ The relief aperture can, however, also be formed as a window which is arranged at a distance from the lower edge o~ the guarantee strip. With that, the lower edge of the guarantee strip remains uninterrupted over its entire circumference, which can improve the guarantee function~ The window can be formed approximately as a rectangle, but could also be polygonal, round or exhibit another configuration. In certain cases the arrangement of numerous neighbouring relief openings would also be conceivable.
It is of particular advantage if the guarantee strip exhibits a section on its circumference on which it i5 connected coherently with the lower edge of the cap, and if it exhibits a complementary section on which it is connected to the lower edge of the cap by ribs which are able to tear off, whereby the nominal breakage point is arranged on one or each of the two bordering regions between the sections. With that, the relief aperture is preferably arranged in a section of the circumference which is relatively firmly connected to the cap. If the guarantee strip exhibits a strengthened retention element on the inner side of the complementary section, for example in the form of a bead, when unscrewing, the ribs between the guarantee strip and the cap will tear first, while the lower material rib of the nominal breakage point will still hold. In the process of the further unscrewing procedure, the lower material rib will also tear without any appreciable expansion taking place at the same time. The material ribs can run parallel or inclined to the direction of the circumference of the guarantee strip. In particular, good results can also achieved with two neighbouring relief openings.
Further individual features and advantages arise out of the following description of an embodiment and out of the drawings. Namely:
Figure 1 A view of a container opening and a cap with torn guarantee strip after unscrewing, Figure 2 a very enlarged cross section through a screw cap according to the invention, Figure 3 a still more enlarged cross section through the nominal breakage point along the line I-l, Figure 4 a cross section through the nominal breakage point along the line II-II, Figure 5 a view of the screw cap from below, according to figure 2, Figure 6 a plan view from above onto the nominal breakage point, with the relief aperture before the cap has been screwed on, respectively with engaged guarantee strip before unscrewing, Figure 7 the nominal breakage point according to figure 6 at closure of the container opening, Figure 8 the nominal breakage point according to figure 6 in its first stage, when screwing off for the first time, Figure 9 The nominal breakage point according to figure 8 at a further stage, with torn upper material rib, Figure 10 a modified embodiment with slit shaped relief aperkure, and Figure 11 a further embodiment with two neighbouring relief apertures.
Figure 1 shows a plastic sGrew cap 1 with an inside thread 5 which serves as a closure for a conkainer opening 2 with an outside thread 6. These types of caps are prefered as a closure for fresh drinks bottles, whereby, as a rule, reuseable glass bottles with a standardised bottle opening are employed. However, disposable glass or plastic bottles can also be used. As opposed to disposable plastic bottles, it is, with that, of greater significance that the guarantee strip 3 does not remain beneath the bead 4, since this would mean increased additional effort when cleansing the bottles.
The recycling of plastic bottles is also facilitated. For this reason, the guarantee strip exhibits a nominal breakage point 11 throuqh its circumference, which has the effect that the guarantee strip can be removed from the bottle opening and preferably remains attached to the screw cap~ A thin film connection 22 for the tearable connection with the rest of the cap is also conceivable, however.
The guarantee strip 3 comprises a circumferential section 9 which is relatively firmly connected to the lower edge of the screw cap and a complementary section 10 which is able to tear away ~rom the cap, respectively is not firmly connected to the cap. On the inner side 7 of the guarantee strip, preferably on the complementary section 10, a retention element is arranged in the form of a bead 8 which, when screwing on the cap for the first time, snaps under the bead 4 on the container opening 2 and causes the necessary tension in order to tear the guarantee strip when unscrewing for the first time~
Details of the screw cap are more closeLy described in figures 2 to 5. An inner seal 16 is arranged on the base of the cap 15 which engages with the container opening. In the place of this type of seal, the screw cap could be provided with an seal insert. The cap side wall 17 is preferably provided with a knurl to increase the grip.
The guarantee strip 3 is connected with the lower edge 18 of the cap in the region of the complementar~ section 10 by ribs 20. A strengthened bead 8, which serves as a retention element, is also arranged on this complementary section. It can be seen in figure 5 that the bead ~ extends through an approximate angle of ~ and, with that, blends at both ends into an engaging edge 21 which is arranged on the section of the circumference which is firmly connected to cap edge.
r~
The nominal breakage point 11 lies in the bordering area between both the sections 9 and lO. It is formed by an upper material rib 13 and a lower material rib 14, which is arranged on the lower edge l9 of the guarantee strip. As can be seen in figures 3 and 4, both the material ribs 13 and 14 are, in cross section, displaced ver~ically to one another and indeed in such a way that the inner wall of the upper material rib 13 exhibits approximately the same diameter as the outer wall of the lower material web 14. This arrangement facilitates ejection of the closure cap from the injection molding tool without damage to the material ribs 13 and 14 occuring at the same time. The guarantee strip runs, in the complementary section 10, approximately wedge shaped along its upper edge in a known way, which likewise serves to provide better deformability when exiting the tool. In the circumferential area 9I the guarantee strip is relatively firmly connected to the lower edge 18 of the cap, which is particularly visible on the right side of figure 2.
The window shaped relief apertures 12 coul~ be formed in a similar way to the intermediate space between the material ribs 13 and 14. With a total height of the guarantee strip of approx. 5 mm, the relief aperture evidently possesses a very small dimension. The optimum arrangement and configuration of the relief aperture, in particular its relative position to the nominal breakage point 11, are dependent upon different parameters. Thereby, the elasticity of the material, the dimensions of the nominal breakage points and the wall thickness of the guarantee strip all play an essential part.
Figures 6 to 9 show the action of the relief aperture at different stages. Figure 6 shows the guarantee strip in an unloaded condition, in particular before the cap is screwed on for the first time. The material ribs 13 and 14 of the nominal breakage point are free of tension and the window $
shaped relief aperture 12 runs rectangulary, without distortion.
During closure of the container opening, the cap is turned in the direction of rotation a. With that, the bead 8, on the inner side of the guarantee strip, slips over the surrounding bead 4 of the container opening, which obviously causes an expansion of the guarantee strip in the direction of its circumference. The expansion involves the material ribs 13 and 14 as well, which thereby are somewhat deformed. The expandability isV however, increased through the relief aperture, which itself likewise expands at the same time, as can be observed in figure 7. After engagement of the retention element 8 beneath the bead 4, the guarantee strip assumes again the tension ree position, as is shown in figure 6.
When unscrewing the cap for the first time, this is turned in the opposite direction, as shown by the arrow b. Since the retention element 8 is no longer able to slip over the bead 4, the ribs 20 on the complementary section 10 will tear. The nominal breakage point is, at this stage of unscrewing, indeed submitted to greater expansion, as can be seen in figure 8, however the two material strips 13 and 14 are not yet torn. Starting at the end of the retention element 8, different lines of force c run on the one hand in the direction of the circumference and on the other hand inclined against the lower edge 18 of the cap, however without the relief apertures 12 at the same time being affected. These forces can thus cause no appreciable expansion, so that the tensile forces are fully effective on the nominal breakage points.
Figure 9 shows a further stage of the unscrewing procedure, with which the upper material rib 13 is already torn. The complementary section 10 now assumes an even greater angle to the lower cap edge 18, respectively to the section of the circumference 9 which is firmly connected to the cap edge.
The lines of force now run only through the lower material rib 14 and indeed likewise inclined in such a way that the relief aperture will not be adversely affected on completion of the tearing off procedure. Further expansion of the screw cap in the direction of unscrewing b will also cause tearing of the lower material rib 14 so that the condition shown in figure 1 is reached.
Figure 10 shows a modified embodiment of the invention with a relief opening in the form of a slit 22 which is open below.
The effect is similar to the window shaped relief aperture, whereby, naturally, the flow of forces in the direction of the circumference at the lower edge of the guarantee strip is interrupted by the slit 22.
Finally, figure 11 shows one more variation with two relief apertures 12 and 12', which are formed as upright rectangles.
Further relief apertures could be arranged on the fixed section of the circumference 9, in particular on its other end.
Claims (12)
1. Screw cap (1) made from plastic, for closure of a container opening (2), with a surrounding guarantee strip (3) which is arranged on the lower edge of the cap and which is formed in one piece and which serves, in the case of an attached cap, to engage beneath an annular bead (4) on the container opening, and which for this purpose exhibits at least one retention element (8) on the inner side (7) which, when screwing on the cap for the first time, is able to be slid over the bead (4) and that, when unscrewing the cap for the first time, causes tearing of the guarantee strip, whereby the guarantee strip exhibits at least one nominal breakage point (11) in the direction of the circumference at which it is able to be separated through its entire height, characterized in that the nominal breakage point (11) is formed by at least two material ribs (13, 14) which connect opposite ends of the guarantee strip, whereby a lower material rib (14) is arranged at the lower edge of the guarantee strip and that at least one relief aperture (12) is arranged next to the nominal breakage point (11) in the guarantee strip (3), for increasing the ability of the guarantee strip to expand when being screwed on for the first time.
2. Screw cap according to Claim 1, characterized in that the relief aperture exhibits the form of an approximately vertical slit, open towards the lower end of the guarantee strip, which extends over a part of the guarantee strip.
3. Screw cap according to Claim 1, characterized in that the relief aperture is formed as a window (12) which is arranged at a distance from the lower edge (19) of the guarantee strip.
4. Screw cap according to claim 3, characterized in that the window (12) is formed approximately as a rectangle or approximately as a polygon.
5. Screw cap according to one of the Claims 1 to 4, characterized in that the guarantee strip exhibits a circumferential section (9) on which it is coherently connected to the lower edge (18) of the cap and that it exhibits a complementary section (10) on which it is connected to the lower edge of the cap by ribs (20) which can be torn away, whereby a nominal breakage point (11) is arranged on one or on each of the two border regions between the sections (9, 10).
6. Screw cap according to Claim 5, characterized in that the guarantee strip exhibits, on the inner side (7), a strengthened retention element (8) on the complementary section (10).
7. Screw cap according to Claim 6, characterized in that the strengthened retention element is a bead which extends over a large part of the complementary section.
8. Screw cap according to one of the claims 5 to 7, characterized in that the relief aperture (12) is arranged on the circumferential section (9).
9. Screw cap according to Claim 8, characterized in that a relief aperture (9) is arranged, one on each end of the circumferential section (9).
10. Screw cap according to one of the claims 1 to 9, characterized in that two relief apertures are arranged next to the nominal breakage point (11).
11. Screw cap according to one of the claims 1 to 10, characterized in that both the material ribs (13, 14) of the nominal breakage point (11) are, in cross section, arranged to be displaced vertically in relation to one other.
12. Screw cap according to one of the Claims 1 to 11, characterized in that at least one of the two material ribs (13, 14) runs inclined to the direction of the circumference of the guarantee strip (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH145390 | 1990-04-27 | ||
| CH1453/90-5 | 1990-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2041078A1 true CA2041078A1 (en) | 1991-10-28 |
Family
ID=4210824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002041078A Abandoned CA2041078A1 (en) | 1990-04-27 | 1991-04-24 | Screw cap with a guarantee strip which is expandable when being screwed on for the first time |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0459941B1 (en) |
| JP (1) | JPH04242555A (en) |
| AR (1) | AR246911A1 (en) |
| AT (1) | ATE95785T1 (en) |
| AU (1) | AU648546B2 (en) |
| BR (1) | BR9101686A (en) |
| CA (1) | CA2041078A1 (en) |
| DE (1) | DE59100477D1 (en) |
| ES (1) | ES2046033T3 (en) |
| NO (1) | NO911503L (en) |
| ZA (1) | ZA913157B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5111947A (en) * | 1990-12-04 | 1992-05-12 | Patterson Michael C | Tamper proof cap and container |
| US5937726A (en) * | 1991-06-29 | 1999-08-17 | Alcoa Deutschland Gmbh | Method for cutting vertical incision in container cap |
| EP0521389A1 (en) * | 1991-06-29 | 1993-01-07 | Alcoa Deutschland GmbH Verpackungswerke | Plastic closure for containers with a tamper-proof element |
| DE4211992A1 (en) * | 1992-04-09 | 1993-10-14 | Mouldtec Pvg Ag Meilen | Bottle cap with locking ring |
| EG21314A (en) | 1992-07-16 | 2000-10-31 | Driutt Rodney Malcolm | Tamper evident closure |
| JP3051637B2 (en) * | 1993-07-19 | 2000-06-12 | 株式会社吉野工業所 | cap |
| CN1064628C (en) * | 1994-06-24 | 2001-04-18 | 皇冠塞公开股份有限公司 | Screw cap with warranty strip |
| IT1290532B1 (en) * | 1996-05-02 | 1998-12-04 | Alcan Rorschach Ag | COVER WITH SCREW CLOSURE FOR A METAL PACKAGE AND PROCEDURE TO CONNECT THE SCREW CLOSURE WITH THE ELEMENT OF |
| AUPO788597A0 (en) | 1997-07-14 | 1997-08-07 | Closures And Packaging Services Limited | Closure |
| DE19730324A1 (en) * | 1997-07-15 | 1999-01-28 | Mouldtec Kunststoff Gmbh | Screw cap with guarantee band |
| DE19827242A1 (en) | 1998-06-18 | 1999-12-30 | Mouldtec Kunststoff Gmbh | Sealing cap, in particular screw cap made of plastic with a guarantee band |
| BR202012020634U2 (en) * | 2012-08-17 | 2018-12-11 | Alberto Llahuet Saura | canned improvement of beverages and the like |
| JP7102095B2 (en) * | 2016-12-27 | 2022-07-19 | 株式会社吉野工業所 | Screw cap with seal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH653307A5 (en) * | 1981-12-11 | 1985-12-31 | Walter Wiedmer | SCREW CAP WITH GUARANTEE STRIP FOR CONTAINERS. |
| DE3345775A1 (en) * | 1983-12-17 | 1985-06-20 | Owens-Illinois, Inc., Toledo, Ohio | Anti-theft package |
| GR850153B (en) * | 1984-02-06 | 1985-03-29 | Obrist Ag Crown | |
| DE3762328D1 (en) * | 1986-07-11 | 1990-05-23 | Interplastic Ag | SECURITY TAPE ON A CLASP. |
| ATE65229T1 (en) * | 1986-09-24 | 1991-08-15 | Alplast Spa | COUNTERFEIT-PROOF SCREW CAP. |
-
1991
- 1991-04-17 NO NO91911503A patent/NO911503L/en unknown
- 1991-04-18 AU AU75099/91A patent/AU648546B2/en not_active Ceased
- 1991-04-19 ES ES91810294T patent/ES2046033T3/en not_active Expired - Lifetime
- 1991-04-19 EP EP91810294A patent/EP0459941B1/en not_active Expired - Lifetime
- 1991-04-19 DE DE91810294T patent/DE59100477D1/en not_active Expired - Fee Related
- 1991-04-19 AT AT91810294T patent/ATE95785T1/en not_active IP Right Cessation
- 1991-04-24 CA CA002041078A patent/CA2041078A1/en not_active Abandoned
- 1991-04-24 AR AR91319519A patent/AR246911A1/en active
- 1991-04-26 BR BR919101686A patent/BR9101686A/en not_active IP Right Cessation
- 1991-04-26 JP JP3096616A patent/JPH04242555A/en active Pending
- 1991-04-26 ZA ZA913157A patent/ZA913157B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04242555A (en) | 1992-08-31 |
| BR9101686A (en) | 1991-11-26 |
| AR246911A1 (en) | 1994-10-31 |
| EP0459941B1 (en) | 1993-10-13 |
| ES2046033T3 (en) | 1994-01-16 |
| ATE95785T1 (en) | 1993-10-15 |
| AU7509991A (en) | 1991-11-07 |
| EP0459941A1 (en) | 1991-12-04 |
| NO911503D0 (en) | 1991-04-17 |
| DE59100477D1 (en) | 1993-11-18 |
| NO911503L (en) | 1991-10-28 |
| AU648546B2 (en) | 1994-04-28 |
| ZA913157B (en) | 1992-01-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19990426 |