IMPROVEMENTS IN OR RELATING TO CLOSURES

Abstract

A dispensing closure is provided and comprises a base and a lid. The base comprises a dispensing spout defining a dispensing orifice and a self-closing valve is provided to control fluid flow out of the orifice in use. The lid comprises a spout sealing arrangement including an external seal for sealing against an outer face of the spout and an internal seal for sealing against an inner face of the spout.

Claims

1. A dispensing closure comprising a base and a lid, the base comprising a dispensing spout defining a dispensing orifice and a self-closing valve is provided to control fluid flow out of the orifice in use, the lid comprising a spout sealing arrangement including an external seal for sealing against an outer face of the spout and an internal seal for sealing against an inner face of the spout, in which the external seal and the spout outer face include cooperating retention beads which engage when the lid is closed on the base and in which the internal seal comprises a spud.

2. A closure as claimed in claim 1, in which the internal seal includes a portion which engages an exterior face of the valve to retain the valve in a closed position.

3. A closure as claimed in claim 2, in which the portion is contoured to match the contour of the valve exterior face.

4. A closure as claimed in claim 2, in which the valve comprises one or more slits defining flaps and in which the portion prevents the flaps from opening when the lid is closed.

5. A closure as claimed in claim 2, in which the portion has a generally cruciform shape.

6. A closure as claimed in claim 5, in which the portion has three limbs.

7. (canceled)

8. (canceled)

9. A closure as claimed in claim 1, in which the outer seal is generally annular.

10. A closure as claimed in claim 1, in which the spout includes an angled lead-in.

11. A closure as claimed in claim 1, in which the valve is carried by a valve retention body.

12. A closure as claimed in claim 9, in which the body is retained in the spout.

13. A flip-top dispensing closure comprising a base and a lid connected by a hinge so that the lid is movable between a closed position and an open position with respect to the base, the base comprising a generally annular dispensing spout defining a dispensing orifice and a self-closing valve is provided in the spout to control fluid flow out of the orifice in use, the lid comprising a spout sealing arrangement including a generally cylindrical external seal for sealing against an outer face of the spout and an internal spud seal for sealing against an inner face of the spout.

14. (canceled)

15. A closure as claimed in claim 1 in combination with a container.

Description

[0026] The present invention is more particularly shown and described, by way of example, with reference to the accompanying drawings, in which:

[0027] FIG. 1 is a perspective view of a closure of the type formed in accordance with the present invention and shown in a closed position;

[0028] FIG. 2 is a plan view of the closure of FIG. 1 shown in an open position;

[0029] FIG. 3 is a section of the closure of FIG. 2 taken along line A-A;

[0030] FIG. 4 is a magnified section of a closure formed according to the present invention shown in the region of a dispensing orifice;

[0031] FIG. 5 shows the region of FIG. 4 with a self-closing valve removed;

[0032] FIG. 6 is a further view of the region of FIG. 5;

[0033] FIG. 7 is a magnified view of a sealing arrangement of FIGS. 4 to 6; and

[0034] FIG. 8 is a magnified view of the dispensing spout of the FIGS. 4 to 6.

[0035] The example embodiments are described in sufficient detail to enable those of ordinary skill in the art to embody and implement the systems and processes herein described. It is important to understand that embodiments can be provided in many alternate forms and should not be construed as limited to the examples set forth herein.

[0036] Accordingly, while embodiment can be modified in various ways and take on various alternative forms, specific embodiments thereof are shown in the drawings and described in detail below as examples. There is no intent to limit to the particular forms disclosed. On the contrary, all modifications, equivalents, and alternatives falling within the scope of the appended claims should be included. Elements of the example embodiments are consistently denoted by the same reference numerals throughout the drawings and detailed description where appropriate.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein are to be interpreted as is customary in the art. It will be further understood that terms in common usage should also be interpreted as is customary in the relevant art and not in an idealised or overly formal sense unless expressly so defined herein.

[0038] Referring first to FIGS. 1 to 3 there is shown a closure generally indicated 10. The closure 10 comprises a generally cylindrical body with a base 15 and a lid 20. The base 15 and lid 20 are connected to each other by a hinge 25.

[0039] The lid 20 comprises a circular, disc-shape top plate 30 and a generally cylindrical side wall 35 which depends from the periphery of the plate 30.

[0040] A double plug seal arrangement 40 depends from the centre of the underside of the lid top plate 30.

[0041] The seal arrangement 40 comprises a generally cylindrical outer seal 45 and an inner spud 47 which includes an outer wall 48 and an inner plug 49.

[0042] Opposite the hinge the lid side wall 35 includes an arcuate recess 50 an at the centre of the recess 50 a hook 55 projects from the open end of the skirt 35.

[0043] The base 15 comprises a generally circular-disc shape top deck 60 which is gently convexly curved. A generally cylindrical outer skirt 65 depends from the periphery of the deck 60. A further, cylindrical inner skirt 70 depends from the deck 60 radially inwardly of the outer skirt 65. At the open end of the skirt 70 a discontinuous annular snap bead 75 is positioned.

[0044] A sealing spigot 85 depends from the deck radially inwardly of the skirt 70.

[0045] At the centre of the deck 60 an annular spout 90 projects and defines a central dispensing orifice 91. Within the spout 90 a self-closing valve 92 is carried (see FIG. 4).

[0046] Opposite the hinge 25 an arcuate tamper-evident band 80 upstands from the deck 60 and is connected thereto by a plurality of frangible bridges 81. At one end of the band 80 is a pull tab 82 which is not directly connected to the platform 60. At the centre of the band a notch 83 is provided.

[0047] The closure 10 is representative of the general type of closure suitable for use with the present invention, as described in more detail below.

[0048] Referring now to FIG. 4 there is shown a magnified view of the region of a closure dispensing spout 190.

[0049] Within the spout 190 is fitted a self-closing valve sub-assembly 100, comprising a valve 102 and a retaining member 101 which shall be referred to hereinafter as a retaining ring 101.

[0050] The ring 101 consists of a moulded single-piece article/body with a so-called “chimney” in the form of a circular wall 116. This chimney 116 provides a surface for assembly machinery to handle the retaining ring 101. At the outer radial end of the chimney wall 116 another circular wall 112, which has the same rotational axis as chimney 116, extending upwards. This end of the wall also includes an inner ring 109 that forms a seat 107.

[0051] Along the circumference of the radially outer surface of wall 112 is a projection in the form of an external snap bead 113. At the end of wall 112 is a crimping flange 114 which in its uncrimped condition is an upstanding wall.

[0052] The flexible self-closing valve 102 has a head portion 103, which is thicker towards the edge than the centre and which has at least one slit 104 therein. The head portion 103 is concave with respect to a container (not shown). This pre-stresses the valve so that it self-closes more easily.

[0053] A side-wall or connecting wall portion 106 connects the head portion 103 with a flange 108. Flange 108 is typically shaped such that it has a relatively substantial size in the form of a rim. It is this flange 108 which rests on the inner ring 109 and sits in the seat 107 of the retaining ring 101 when it is located correctly. This forms a self-closing valve sub-assembly 100 that can easily be manipulated.

[0054] In this embodiment, to crimp the valve 102 in place, the crimping flange 114 is bent over until it sandwiches the flange 108 between itself 114 and the sloping surface 111.

[0055] Although in this embodiment the crimping flange 108 is shown as being bent over by 90 degrees radially inwards it should be understood that the angle through which it need be bent is not fixed.

[0056] The sub-assembly 100 is formed separately from the closure and also from the container.

[0057] The end of the spout wall which merges into the base deck 160 is provided with an annular snap bead 192. The bead 192 cooperates with the body bead 113 to allow the sub-assembly 100 to be fitted into the spout 190.

[0058] FIGS. 5 to 8 show the spout/sealing arrangement in more detail.

[0059] The sealing arrangement 140 comprises a generally cylindrical outer wall 145 formed with a bead 146 at its free end. An inner sealing spud 147 is provided and includes an outer sealing wall 148 and an inner sealing plug 149.

[0060] The inner sealing plug 149 is a generally cruciform- or Y-shape with, in this embodiment, three legs 143a, 143b, 143c. Each of the legs includes a curved terminal face 144a, 144b, 144c.

[0061] The spout 190 comprises a generally cylindrical main wall 195. One end of the wall 195 merges into the base top deck 160; at this end an annular internal snap bead 192 is provided. The other end of the wall 195 is provided with an external annular snap bead 193. The wall 195 continues with a radially inwardly directed shoulder 194 at the centre of which a terminal orifice portion 196 is provided. The portion 196 comprises a triangular section annular upstand 197 with an inclined inner face 198. An annular wall 199 depends from the free end of the wall 195.

[0062] In use, when the lid is closed onto the base, the outer wall 145 seals against the spout wall 195 and the beads 146, 193 engage. The sealing arrangement wall 148 seals against the interior of the upstand 197. The faces 144a, 144b, 144c press against the valve head 103 and prevent the petals from opening so that leakage of product out of the valve is prevented when the lid is closed.

[0063] Although illustrative embodiments of the invention have been disclosed in detail herein, with reference to the accompanying drawings, it is understood that the invention is not limited to the precise embodiments shown and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope of the invention.