KIESER, Wolfgang (Sulzhofer Strasse 15, Hohenollen, 67744, DE)
ADLER, Nils Peter (Hogtunveien 12, Asker, N-1383, NO)
KIESER, Wolfgang (Sulzhofer Strasse 15, Hohenollen, 67744, DE)
CLAIMS
1. A method comprising: - providing a pour spout device comprising an externally threaded pour spout, an internally threaded cap for closing said pour spout, and a tamper-evidence arrangement attached to said cap, attachingly applying said device to a wall of a container, and attaching said arrangement to said pour spout and/or to said wall, said attaching of said arrangement being substantially simultaneous with said attachingly applying of said device. 2. A method according to claim 1, wherein said attachingly applying of said device and said attaching of said arrangement are performed by one-and-the-same ultrasonic sealer .
3. A method according to claim 1 or 2, wherein said attachingly applying of said device is attachingly applying said device to an internal surface of said wall round a hole through said wall and said attaching of said arrangement is attaching of a part of said arrangement between said internal surface and said pour spout to said internal surface and said pour spout.
4. A pour spout device for applying to a wall of a container, comprising an externally threaded pour spout having a flange projecting outwardly from a lower end zone thereof, and an internally threaded cap for closing said pour spout, said cap including a substantially L- section means projecting downwardly from a body of said cap, the lower limb of the substantially L-section being weldable to an upper surface of said flange, and the upper limb of said substantially L-section including a frangible, tamper-evident bridge.
5. A device according to claim 4, wherein said lower limb comprises a ring.
6. A device according to claim 5, wherein said ring consists of a plurality of discrete ring segments. 7. A device according to any one of claims 4 to 6, wherein said ring includes substantially radial flanging.
8. A device according to claim 7, wherein said pour spout includes an upwardly and outwardly protruding annular shoulder at an inner periphery of said flange, and said ring includes an upper zone, and a lower zone relatively thin radially compared with said upper zone, joining said upper zone to said flanging and located immediately radially outwardly of said shoulder.
9. A device according to claim 8 and further comprising a barrier disc, wherein said pour spout includes a countersink corresponding to said shoulder and seating an outer periphery of said barrier disc.
10. A device according to any one of claims 4 to 9, wherein said bridge is one of a multitude of relatively tall, frangible, tamper-evident bridges distributed round said cap ..
11. A device according to claim 10 as appended to claim 6, wherein the segments are substantially co-extensive in peripheral width with respective said bridges. 12. In combination, a container and a pour spout device applied to a wall of said container, said device comprising an externally threaded pour spout having a flange projecting outwardly from a lower end zone thereof, and an internally threaded cap for closing said pour spout, said cap including a substantially L-section means projecting downwardly from a body of said cap, the lower limb of the substantially L-section being welded to an upper surface of said flange and/or said wall, and the upper limb of said substantially L-section including a frangible, tamper-evident bridge.
13. A combination according to claim 12, wherein said lower limb comprises a ring.
14. A combination according to claim 13, wherein said ring consists of a plurality of discrete ring segments. 15. A combination according to any one of claims 12 to 14, wherein said ring includes substantially radial flanging.
16. A combination according to claim 15, wherein said pour spout includes an upwardly and outwardly protruding annular shoulder at an inner periphery of said flange, and said ring includes an upper zone, and a lower zone relatively thin radially compared with said upper zone, joining said upper zone to said flanging and located immediately radially outwardly of said shoulder.
17. A device according to claim 16 and further comprising a barrier disc, wherein said pour spout includes a countersink corresponding to said shoulder and seating an outer periphery of said barrier disc.
18. A device according to any one of claims 12 to 17, wherein said bridge is one of a multitude of relatively tall, frangible, tamper-evident bridges distributed round said cap .
19. A device according to claim 18 as appended to claim 14, wherein the segments are substantially co-extensive in peripheral width with respective said bridges. 20. A combination according to any one of claims 12 to 19, wherein said lower limb is located between and welded to said flange and an internal surface of said wall round a hole through said wall.
21. A combination according to claim 20, wherein said flange is weldingly attached to said internal surface radially outwardly of said lower limb. |
IMPROVEMENTS IN OR RELATING TO POUR SPOUT DEVICES
This invention relates to a method of applying a pour spout device to a container and also relates to a pour spout device itself. According to one aspect of the present invention, there is provided a method comprising :- providing a pour spout device comprising an externally threaded pour spout, an internally threaded cap for closing said pour spout, and a tamper-evidence arrangement attached to said cap, attachingly applying said device to a wall of a container, and attaching said arrangement to said pour spout and/or to said wall, said attaching of said arrangement being substantially simultaneous with said attachingly applying of said device.
Owing to this aspect of the invention, it is possible to simplify the production apparatus and process, since the attachingly applying of the device to the wall and the attaching of the tamper-evidence arrangement can be performed by one-and-the-same piece of equipment, in particular by an ultrasonic sealer.
According to a second aspect of the present invention, there is provided a pour spout device for applying to a wall of a container, comprising an externally threaded pour spout having a flange projecting outwardly from a lower end zone thereof, and an internally threaded cap for closing said pour spout, said cap including a substantially L-section means projecting downwardly from a body of said cap, the lower limb of the substantially L-section being weldable to an upper surface of said flange, and the upper limb of said substantially L-section including a frangible, tamper-evident bridge . According to a third aspect of the present invention,
there is provided in combination, a container and a pour spout device applied to a wall of said container, said device comprising an externally threaded pour spout having a flange projecting outwardly from a lower end zone thereof, and an internally threaded cap for closing said pour spout, said cap including a substantially L-section means projecting downwardly from a body of said cap, the lower limb of the substantially L-section being welded to an upper surface of said flange and/or said wall, and the upper limb of said substantially L-section including a frangible, tamper-evident bridge .
In a preferred embodiment of the invention, the lower limb comprises a ring, which may consist of a plurality of discrete ring segments, and the ring includes substantially radial flanging.
In one version, where the device includes a barrier disc, the pour spout includes an upwardly and outwardly protruding annular shoulder at an inner periphery of the flange of the pour spout, and also includes a countersink corresponding to the shoulder and seating an outer periphery of the barrier disc. In that version, the ring includes an upper zone and a lower zone relatively thin radially compared with the upper zone, joining the upper zone to the flanging and located immediately radially outwardly of the shoulder. In the preferred embodiment, the bridge is one of a multitude of relatively tall bridges. The discrete ring segments may be substantially co-extensive in peripheral widths with the respective bridges.
In order that the invention may be clearly and completely disclosed, reference will now be made, by way of example, to the accompanying drawings, in which: -
Figure 1 is an axial sectional view of a pour spout device attached to a packaging carton, the device being in a condition following production thereof by moulding and following welding thereof to the inside surface of a wall of
the carton;
Figure 2 is a top plan view of the device but with the carton wall omitted for the sake of clarity;
Figure 3 is a view similar to Figure 1 but of a modified version of the device;
Figure 4 is a top plan view of the version of Figure 3;
Figure 5 is a detail X of Figure 1 or Figure 3;
Figure 6 is a view similar to Figure 5, but showing a modification; Figure 7 is a view similar to Figure 1 of another modified version of the device;
Figure 8 is a top plan view of that other modified version;
Figure 9 is a partly sectional side elevation of that other modified version, prior to opening thereof;
Figure 10 is a view similar to Figure 9, but of that other modified version at a time during opening thereof;
Figure 11 is a view similar to Figure 9, but of a further modified version of the device; Figure 12 is a top plan view of a still further modified version of the device; and
Figure 13 is a view similar to Figure 9 of that still further modified version.
Referring to Figures 1, 2 and 5, the pour spout 2 takes the form of a fitment which, in the condition shown, is applied to a wall 4 of a packaging carton for a flowable substance, the wall 4 comprising a paperboard layer 4A coated at its inner and outer surfaces with thermoplastics layers 4B and 4C. The layers 4B and 4C may be of a moisture barrier plastics material, particularly low density polyethylene
(LDPE) , and there is an oxygen barrier layer 4D of, for example, aluminium foil or ethylene vinyl alcohol (EVOH) between the layers 4A and 4B. The flowable substance contained may be a liquid, such as fruit juice, or a powder. The device 2 comprises an externally threaded pour spout
6 and a screw cap 8 for closing the spout 6. The pour spout 6 includes a pour spout body 10 encircling a pouring outlet 12 and having an inflow mouth 14 and an outflow mouth 16. A skirt 18 of the cap 8 fits sealingly into the outflow mouth 16. The pour spout 6 also includes a flange 20 which protrudes radially outwards from the body 10 and whereby the spout 6 is welded in a fluid-tight manner to the layer 4B, the device 2 being of a thermoplastics material suitable for being ultrasonically welded to the layer 4B. The device 2 is moulded in two pieces, with one piece being the spout 6 and the other piece being the cap 8. The cap 8 consists of a cap body 8A, a flanged ring 8B co-axial with the body 8A, and tamper-evident bridges 8C interconnecting the body 8A and the ring 8B. At some time after moulding, the two pieces 6 and 8 are axially pressed together such that internal screw-threading of the cap 8 rides over external screw-threading of the spout 6, to bring the pieces 6 and 8 to the condition shown in Figures 1, 2 and 5. In this condition, the flange 22 of the ring 8B, which flange 22 is significantly thinner than an upper part of the ring 8B, arrives in an annular hollow 24 between an energy ring 26 on the upper surface of the flange 20 and an annular shoulder 28 of the spout 6. A web 29 of the ring 8B interconnects that upper part and the flange 22 and is thin in order to enable the wall 4 to approach as closely as possible to the body 10. Upon ultrasonic welding of the device 2 to the wall 4, the flange 22 is welded to both the layer 4B and the flange 20. The shoulder 28 exists in this version because the pouring outlet 12 is countersunk at its inflow mouth 14 to receive a barrier disk 30 which may comprise a thermoplastics sealing layer 30A for attaching the disk 30 to the spout 6 and an oxygen barrier layer 30B of, for example, aluminium foil or EVOH.
The version of Figures 3 and 4 differs from that of Figures 1 and 2 solely in that the ring 8B is segmented, so
that there are four arcuate segments 32, each subtending almost a right-angle at the axis of the device 2, with short gaps 34 among them. Again, the arcuate segments 32 are connected to the cap body 8A by the tamper-evident bridges 8C.
The provision of the oxygen barriers 4D and 3OB are particularly preferred in the long-life packaging of otherwise short-life products, such as fruit juices.
In circumstances where an oxygen barrier layer 3OB (and even the oxygen barrier layer 4D) is not required, then the versions of Figures 1 to 4 may each be modified as illustrated in Figure 6, in which the shoulder 28 is omitted, as is the thin web 29 joining the flange 22 to the remainder of the ring 8B. Instead of there being four segments, there may be more or less than four; even a single arcuate segment is a possibility.
With the versions shown in Figures 1 to 6, where the bridges 8C are very short in proportion to the total height of the device 2, it can be difficult reliably to mould them repetitively in such a way that the bridges remain thin, i.e. that the gaps among them do not reduce in size. This makes its more difficult for consumers to open the device, because the opening torque required could thus be greater than the designed torque. Furthermore, the shortness of the bridges makes it difficult for consumers immediately to ascertain whether the tamper-evident bridges have already been broken.
The version shown in Figures 7 to 10 differs from that shown in Figures 1 and 2 as modified by Figure 6 solely in that the bridges 8C are relatively tall, whereby not only is reduction in the size of the gaps among them during moulding less likely, so that the opening torque required is very likely to be the designed torque, but also the consumer can more readily see when the bridges have been broken. Furthermore, a relative saving of material is achieved.
Figure 10 illustrates the anticlockwise turning of the cap body 8A in order to commence breaking of the bridges 8C.
The version shown in Figure 11 differs from that shown in Figures 7 to 10 solely in that it has, instead of the ring 8B, segments 32 corresponding to those of the version of Figures 3 and 4.
The version of Figures 12 and 13 differs from that of
Figure 11 solely in that the segments 32 have each been reduced in peripheral width to that of each of the bridges 8C, so that the tamper evident bridges 8C are, in effect, provided by L-shaped arms 36.
The height of the bridges 8C in the versions of Figures 7 to 13 is at least 10%, preferably about 20%, if not more, of the height of the device 2.