Beverage capsule

Abstract

A perforable beverage capsule is provided and comprises a generally frustoconical body having a sidewall closed at one end by a piercable inlet wall through which hot water can be injected in use. The end of the sidewall opposite the inlet wall has a rim, and a sealing ring is provided.

Claims

1. A perforable beverage capsule comprising a generally frustoconical body having a sidewall closed at one end by a piercable inlet wall through which hot water can be injected in use, an intermediate wall joining the sidewall and the piercable inlet wall, wherein the piercable inlet wall includes a generally central disc and the intermediate wall includes a first circumferential array of generally triangular contiguous facets surrounding the generally central disc, wherein the sidewall is formed by a second circumferential array of generally triangular, contiguous facets with alternating facets being oppositely oriented, wherein facets included in the second circumferential array of generally triangular, contiguous facets of the sidewall share vertices with facets included in the first circumferential array of generally triangular, contiguous facets of the intermediate wall, and wherein the facets included in the second circumferential array of generally triangular, contiguous facets of the sidewall have linear side edges.

2. The perforable beverage capsule of claim 1, wherein each of the first circumferential array of generally triangular contiguous facets of the intermediate wall provides an isotoxal star polygonal shape.

3. The perforable beverage capsule of claim 2, wherein the first circumferential array of generally triangular contiguous facets includes isosceles triangles.

4. The perforable beverage capsule of claim 1, wherein the perforable beverage capsule further comprises a rim.

5. The perforable beverage capsule of claim 4, wherein a closure is applied over the rim.

6. The perforable beverage capsule of claim 5, wherein the closure is a foil seal.

7. The perforable beverage capsule of claim 1, wherein the first circumferential array of generally triangular contiguous facets of the intermediate wall includes faceted ridges alternating with faceted rebates.

8. The perforable beverage capsule of claim 1, wherein each neighboring facet included in the generally triangular contiguous facets of the intermediate wall is oppositely oriented relative to one another.

9. A perforable beverage capsule comprising a generally frustoconical body having a sidewall closed at one end by a piercable inlet wall through which hot water can be injected in use, and an intermediate wall coupled between the sidewall and the piercable inlet wall, wherein the piercable inlet wall comprises a generally central disc and the intermediate wall is formed by a plurality of generally pyramidal, hollow, tri-faceted ridges alternating with hollow tri-faceted rebates, wherein the sidewall is formed by a circumferential array of generally triangular, contiguous facets with alternating facets being oppositely oriented, and wherein facets of the sidewall share vertices with each of the tri-faceted ridges of the intermediate wall.

10. The perforable beverage capsule of claim 9, wherein the plurality of tri-faceted ridges provides an isotoxal star polygonal shape.

11. The perforable beverage capsule of claim 10, wherein the isotoxal star polygonal shape includes isosceles triangles.

12. The perforable beverage capsule of claim 9, wherein the perforable beverage capsule further comprises a rim.

13. The perforable beverage capsule of claim 12, wherein a closure is applied over the rim.

14. A perforable beverage capsule comprising a generally frustoconical body having a sidewall closed at one end by a piercable inlet wall through which hot water can be injected in use, wherein the piercable inlet wall includes a generally central disc, and an intermediate wall surrounding the generally central disc, the intermediate wall is formed of generally triangular contiguous facets alternating with generally triangular shaped rebates, wherein the sidewall is formed by a circumferential array of generally triangular, contiguous facets, wherein each of the generally triangular, contiguous facets of the sidewall share a vertex with a corresponding facet included in the intermediate wall, and wherein each of the generally triangular, contiguous facets of the sidewall is planar.

15. The perforable beverage capsule of claim 14, wherein the generally triangular contiguous facets of the intermediate wall provide an isotoxal star polygonal shape.

16. The perforable beverage capsule of claim 15, wherein the isotoxal star polygonal shape includes isosceles triangles.

17. The perforable beverage capsule of claim 14, wherein the perforable beverage capsule further comprises a rim.

18. The perforable beverage capsule of claim 17, wherein a closure is applied over the rim.

19. The perforable beverage capsule of claim 18, wherein the closure is a foil seal.

Description

(1) Embodiments of the present invention are shown, by way of example, in the accompanying drawings.

(2) 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.

(3) Referring first to FIGS. 1 and 2 there is shown a beverage capsule 10.

(4) The capsule 10 comprises a generally frustoconical body having a sidewall 15 closed at one end by a piercable inlet wall 20 through which hot water can be injected in use.

(5) The sidewall 15 comprises a plurality of generally triangular, contiguous facets 17, with alternating facets being oppositely oriented.

(6) The inlet wall 20 and the sidewall 15 are joined by an intermediate wall section 25 which is formed by a circumferential array of a plurality of generally triangular, contiguous facets 19, with alternating facets being oppositely oriented.

(7) The end of the sidewall opposite the inlet wall has a rim/flange 30 that projects radially outwards from the free end of the sidewall.

(8) A separate sealing ring/disc 35 is provided. In this embodiment the ring 35 is formed from a foamed material.

(9) The ring 35 is fixed to the rim 30. Fixation could be achieved, for example, by clamping, bonding or welding (e.g. heat or ultrasonic).

(10) In FIG. 3 a rim 130 is provided with an undercut 132. The ring 135 is assembled into the undercut 132.

(11) Production Steps:

(12) 1. Injection capsule (for example injection moulding of a plastics material) 2. Ring assembly 3. Filling 4. Sealing

(13) Production and ring assembly may be conducted in one assembly line.

(14) In FIG. 4 sealing discs 235 are stamped from a sheet of material 237. In other embodiments discs are formed by injection or compression moulding.

(15) FIGS. 5 to 12 shows a capsule 310 formed according to a further embodiment.

(16) The capsule 310 is similar to the capsule 10, having a sidewall 315 closed at one end by a piercable inlet wall 320.

(17) The sidewall 315 comprises a plurality of generally triangular, contiguous hollow facets 317, with alternating facets being oppositely oriented. In this embodiment there are thirty-two facets in total; sixteen in each longitudinal orientation. Other numbers of facets are possible.

(18) The inlet wall 320 and the sidewall 315 are joined by an intermediate wall section 325 which is formed by a circumferential tooth-like array comprising a plurality of generally pyramidal, hollow, tri-faceted ridges 328 alternating with hollow tri-faceted rebates 329. In this embodiment there are sixteen triangular shapes and sixteen rebates which serve to reinforce the base against collapse during piercing. Other numbers of reinforcement shapes and rebates are possible.

(19) The end of the sidewall opposite the inlet wall 320 has a rim/flange 330 that projects radially outwards from the free end of the sidewall.

(20) The rim 330 includes a circumferential recess/channel 334 which can receive a sealing ring (not shown).

(21) Radially inboard of the recess 334 is an annular raised surface formation pattern 340. In this embodiment the pattern is formed from a plurality of letters 342. The pattern is formed from a plurality of different letters and in this embodiment the pattern is non-repeating.

(22) FIGS. 13A and 13B shows a magnified view of a further embodiment in which a repeating pattern 440 of three letters 442 is used (all letters in the circumferential array are therefore not the same).

(23) FIG. 14 shows a perforable beverage capsule 510 formed according to the present invention.

(24) The capsule 510 comprises a generally frustoconical body having a sidewall 515 closed at one end by a piercable inlet wall 520 through which water or other fluid can be injected in use.

(25) The generally disc-like piercable inlet wall 520 includes a generally central star like structure 550 to provide rigidity. The structure is an isotoxal star polygonal shape.

(26) In this embodiment the perimeter of the bottom wall 520 is also formed as a star-like structure.

(27) Moving from radially inwards to outwards, therefore, the bottom wall 520 comprises: a central recessed disc 560; a circumferential array of inwardly facing tri-faceted ridges/triangular castellations 565 alternating with tri-faceted rebates 570 surrounds the disc 560; an annulus 575; a circumferential array of outwardly facing tri-faceted ridges 580 alternating with tri-faceted rebates 585 surrounds the annulus 575.

(28) In this embodiment the sidewall is generally smooth. In alternative embodiments the sidewall may comprise a plurality of facets, such as generally triangular, contiguous facets.

(29) FIG. 15 shows a capsule 610 formed according to a further embodiment. The capsule is similar to the capsule 510 except that the central recessed disc 660 is smaller and the annulus 675 is larger. In addition there are more inwardly facing ridges 665 and rebates 670 and more outwardly facing ridges 680 and rebates 685.

(30) FIG. 16 shows a capsule 710 formed according to a further embodiment. The capsule 710 is similar to the capsule 610 except that the outer ridges 780 and rebates 785 are inwardly facing.

(31) FIGS. 17 to 20 show a capsule 810 formed according to a further embodiment. The capsule 810 is similar to the capsule 610.

(32) FIGS. 21 to 24 show a capsule 910 formed according to a further embodiment. In this embodiment there is no central recessed disc; the inlet wall 920 has a generally flat central disc surrounded by a peripheral annular belt of triangular castellations 990.

(33) 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 as defined by the appended claims and their equivalents.