WO2018172722A1

WO2018172722A1 - Pour spout fitment and method for opening said fitment

Info

Publication number: WO2018172722A1
Application number: PCT/GB2017/000036
Authority: WO
Inventors: Frode Enemark
Original assignee: Elopak AS
Current assignee: Elopak AS
Priority date: 2017-03-18
Filing date: 2017-03-18
Publication date: 2018-09-27
Anticipated expiration: 2019-09-18
Also published as: EP3595983A1; EP3595983B1

Abstract

A pour spout fitment comprises an externally threaded, tubular pour spout (4), an internally threaded cap (12), a tamper-evident band (16) co-axially and frangibly attached to an inner end of the cap (12), an annular slot (20) co-axial with the spout (4), an annular flange (18) co-axial with and provided by the band (16) and projecting into the slot (20), at least one detent in the slot (20), at least one detent on the flange (18), a first external reference on the cap (12), a second external reference on the band (16) and in a predetermined relationship with the first external reference. The arrangement is such that, upon unscrewing of the cap (12), the at least one detent on the spout (4) co-operates with the at least one detent on the band (16) to detain the band (16) against turning movement relative to the spout (4) and to detain the band (16) in a position relative to the substantially fully reclosed cap (12) such that the reference on the band (16) remains out of the predetermined relationship. A method of providing tamper evidence is also disclosed.

Description

POUR SPOUT FITMENT AND METHOD FOR OPENING SAID FITMENT

This invention relates to a pour spout fitment and a method of providing tamper evidence.

According to one aspect of the present invention, there is provided a method comprising opening a pour spout fitment, wherein said opening comprises turning a cap of said fitment carrying a first reference relative to a pour spout of said fitment so as to cause a tamper-evident band carrying a second reference initially in a predetermined relationship to said first reference to be detained against turning with said cap. According to another aspect of the present invention, there is provided a pour spout fitment comprising an externally threaded, tubular pour spout, an internally threaded cap whereof the threading co-operates with the external threading of the spout, a tamper-evident band co-axially and frangibly attached to an inner end of said cap, a substantially annular slot substantially co-axial with and in one of said spout and said band, a substantially annular flange substantially co-axial with and provided by the other of said spout and said band and projecting into said slot, at least one detent in said slot, at least one detent on said flange, a first external reference on said cap, a second external reference on said band and in a predetermined relationship with said first external reference, the arrangement being such that, upon unscrewing of said cap, said at least one detent on the spout co-operates with said at least one detent on the band to detain the band against turning movement relative to the spout and to detain the band in a position relative to the substantially fully reclosed cap such that the reference on the band remains out of said predetermined relationship. Owing to these aspects of the invention, it is possible to provide a tamper- evidence system which is relatively cheap and not easy to overcome.

The flange is preferably provided by the tamper-evident band. The detents preferably comprise teeth on the band and on the spout. Alternatively, the detents could comprise teeth on one of the band and the spout and notches in the other of the band and the spout.

Advantageously, the at least one detent on the band faces substantially radially inwards and the at least one detent on the spout faces substantially radially outwards.

Of course, the internal threading and the external threading each have at least one start. In a preferred embodiment, the internal threading and the external threading each have a plurality of starts, particularly at least three. It is especially advantageous if the number of starts and the effective height of the internal threading on the cap and the external threading on the spout are such that, upon reclosing, the cap cannot be turned sufficiently for the two references to re-enter the predetermined relationship. Each of the references may be coloured, contrastingly with the colour(s) of the cap and the band, with the references having been printed onto the cap and the band. The same or other references may be tactile to assist the blind or partially sighted.

In reclosing the cap, it is turned in a sense opposite to its opening sense and, upon the cap being fully reclosed, the first reference is out of the predetermined relationship relative to the second reference, owing to the band's having been detained against movement with the cap.

In order that the invention may be clearly and completely disclosed, reference will now be made, by way of example, to the accompany drawings, in which:-

Figure 1 is a top perspective view of a pour spout fitment in a condition before first opening; Figure 2 is a view similar to Figure 1 of the fitment following opening and full reclosing thereof; Figure 3 shows a longitudinal part-section through the fitment- Figure 4 is a horizontal sectional view through the fitment at a level of a tamper- evident band on the line IV - IV of Figure 3; and

Figure 5 shows a detail of Figure 4. Referring to the drawings, a pour spout fitment 2 comprises a tubular pour spout 4 incorporating an external flange 6 at its lower end. The flange 6 may be sealed to the outside of a wall of a packaging container round a location at which a pouring hole is formed, or will be formed by the fitment; alternatively, it may be sealed to the inside of the wall and the fitment protrude externally from a hole through the wall.

The spout 4 is formed with multi-start, external threading 8 which meshes with multi-start, internal threading 10 of a screw cap 12 of the fitment. The cap 12 is connected via bridges 14 to a tamper-evident band 16 of the fitment, the bridges 14 being distributed around the periphery of the cap 12. The band 16 includes an annular flange 18 which projects into an annular slot 20 in the outside of the spout 4. At a predetermined location around the slot 20 there projects radially outwardly from the spout into the slot at least two (in this case a group of four) tooth-form detents 22, for co-operating with at least one of a plurality (in this case three) of tooth-form detents 24 equispaced around and projecting from the inner periphery of the flange 18. The detents 22 are in a single group spaced peripherally through 15° from each other, while the detents 24 are, of course, spaced peripherally from each other through 120°. The intention is that, upon unscrewing of the cap 12, the bridges 14 should break at the time when one of the detents 24 interdigitates with two of the dents 22. Although, thus only two detents 22 would appear to be required, the tolerances in moulding of the ribs and thus the angle of turning of the cap 12 relative to the spout 4 necessary to assure complete breaking of the bridges is relatively large, which is why four detents 22 are provided over an angle of 45°. Of course, with tighter tolerances in moulding of the bridges 14, three, or maybe even two, detents 22 could be sufficient. The number (three) of detents 24 equals the number (three) of starts of each threading 8 and 10. The angle of turning required before complete breaking depends on the number of detents 24 and of the thread starts. For example, one detent 24 and one thread might require an angle of 360°.

As seen in Figure 1, the external peripheral surfaces of the cap 12 and the band 16 are formed with a vertical coloured printed mark 26 consisting of a part 26' on the cap and a part 26" on the band. The colour (e.g. red) of the mark 26 contrasts with the colour(s) (e.g. white) of the cap and the band. The external peripheral surface of the cap 12 is formed with knurling 28.

The method of opening and reclosing of the fitment 2 is as follows.

The cap 12, accompanied by the band 16, is turned relative to the spout 4. As its turning increases beyond about 60°, the bridges 14 are broken, because the flange 18 remains detained against axial movement by the upper surface 20' of the slot 20. Once a detent 22 is engaged between a pair of detents 24, the band 16 remains held in a limited peripheral position relative to the spout 4. As illustrated by Figure 2, upon full reclosing of the cap 12, the mark part 26' is visually identifiably displaced through about 60° relative to the mark part 26".

Claims

1. A method comprising opening a pour spout fitment, wherein said opening comprises turning a cap of said fitment carrying a first reference relative to a pour spout of said fitment so as to cause a tamper-evident band carrying a second reference initially in a predetermined relationship to said first reference to be detained against turning with said cap.

2. A method according to Claim 1, and further comprising reclosing said cap, in which said cap is turned in a sense opposite to its opening sense and upon said cap being fully reclosed, said first reference is out of said relationship relative to said second reference, owing to said band's having been detained against turning movement with said cap.

3. A method according to Claim 1 or 2, wherein frangible bridges

interconnecting said band and said cap are broken when at least one detent on said band is securely detained by at least one detent on said spout.

4. A pour spout fitment comprising an externally threaded, tubular pour

spout, an internally threaded cap whereof the threading co-operates with the external threading of the spout, a tamper-evident band co-axially and frangibly attached to an inner end of said cap, a substantially annular slot substantially co-axial with and in one of said spout and said band, a substantially annular flange substantially co-axial with and provided by the other of said spout and said band and projecting into said slot, at least one detent in said slot, at least one detent on said flange, a first external reference on said cap, a second external reference on said band and in a predetermined relationship with said first external reference, the

arrangement being such that upon unscrewing of said cap, said at least one detent on the spout co-operates with said at least one detent on the band to detain the band against turning movement relative to the spout and to detain the band in a position relative to the substantially fully reclosed cap such that the reference on the band remains out of said predetermined relationship.

5. A fitment according to Claim 4, wherein said flange is provided by said

tamper-evident band. A fitment according to Claim 4 or 5, wherein the detents comprise teeth operating with each other.

7. A fitment according to any one of Claims 4 to 6, wherein said at least one detent on said band faces substantially radially inwards and said at least one detent on said spout faces substantially radially outwards.

8. A fitment according to any one of Claims 4 to 7, wherein said internal threading and said external threading each have a plurality of starts.

9. A fitment according to Claim 8, wherein said plurality of starts is at least three.

10. A fitment according to any one of Claims 4 to 9, wherein each of the

references is coloured contrastingly with the colour(s) of the cap and the band.

11. A fitment according to any one of Claims 4 to 10, wherein said references have been printed onto said cap and said band.