POURING ATTACHMENT

Abstract: A pouring spout attachment (12) is applied to a pourable-product-carrying container (10) over a location where the container (10) has one of a partial depth cut (16) and an opening formed therein. The attachment (12) includes a body (20) and may have a removable cap (46) mounted thereon. The body (20) includes an internal projection (28), an external mounting flange (22), and an internal end wall (30) having a web segment (39) cut therein so as to be movable as a flap about a pivot axis (40). A minor segment (41) of the flap (39) acts as a projection such that, upon a major segment (43) of the flap (39) being pivoted inwardly, the projection (41) is pivoted so as to snap past the internal projection (28) to retain a fully open condition.

Description: PO.TRTNK ΆTTAΠHMKNT This invention relates generally to pouring devices for containers and, more particularly, to spout attachments for liquid-carrying cartons. Heretofore, pouring spout attachments have been used on liquid-carrying containers. Such attachments mounted on an outside carton surface are shown and described in US-A- 5,088,643; US-A-4,813,578; and US-A-4,964,562. Attachments having flanges secured on inside surfaces and extending out through openings in a container panel and each including a pull tab are disclosed in US-A-4, 948,015; US-A-4,795,065; and US-A-4,669,640. US-A-5,292, 025 and US-A-4, 600,127 disclose attachments having rotatable members having tapered ends for breaking rupturable, tapered panel segments when rotated and depressed. Push-in tabs for breaking weakened panel zones in order to open containers are disclosed in EP-A-0577867; GB-A- 2267896; US-A-5, 101, 999; US-A-4, 934,590; US-A-4, 925,034; US- A-4,892,217; US-A-3, 938, 693; US-A-3, 924,777; and US-A- 3,871,552. In GB-A-2267896 for example, the tab, as it is pressed open, latches behind portions of the carton panel wall to retain it in its open condition. However, since the lines of tearing of the wall can vary undesirably and since those portions are relatively flexible, attainment and maintenance of the open condition of the tab is unreliable. US-A-4, 934,590 discloses a package including a lever having a forward portion and a rearward portion, and a U- shaped lip having oppositely disposed locking arms, wherein the forward portion is pushed downwardly, breaking a frangible connection and pivoting the rearward portion upwardly. Pivoting of the lever is continued until the rearward portion is locked by an interference fit with an edge of the lip and, additionally, pressed below the locking arms to provide a one-way locking means. However, this is a relatively bulky and complex arrangement. According to one aspect of the present invention, there is provided a pouring attachment for attaching to a wall of a container, comprising an inner body in the form of a flap, an outer body bounding a pouring zone and extending around said flap, and hinge means nearer one side of said pouring zone than the opposite side of said pouring zone and mounting said flap in said outer body for turning, about an axis extending transversely of said outer body, between a flow- obturating position in said pouring zone and a flow-enabling position, and a detent on said outer body, characterized in that said detent is nearer said one side than said opposite side and said flap has a portion adapted to engage said detent whereby said flap is retained in said flow-enabling position following turning of said flap from said flow- obturating position to said flow-enabling position. According to another aspect of the present invention, there is provided a combination comprising: ( i) a container having a wall, and (ii) a pouring device at the outside of said wall and comprising an inner body in the form of a flap, an outer body bounding a pouring zone and extending around said flap, which occupies a flow-obturating position in said pouring zone, hinge means nearer one side of said pouring zone than the opposite side of said pouring zone and mounting said flap in said outer body for turning, about an axis extending transversely of said outer body, between said flow-obturating position in said pouring zone and a flow-enabling position, and a detent on said outer body, characterized in that said detent is nearer said one side than said opposite side and said flap has a portion adapted to engage said detent, whereby said flap is retained in said flow-enabling position following turning of said flap from said flow-obturating position to said flow-enabling position. Owing to the invention, it is possible to provide a flapped pouring attachment which is both simple and compact and yet retains the flap reliably in its open condition. The present attachment is applicable to containers having partial depth cuts or openings formed in walls thereof. The attachment may be applied to the outside of a selected container panel. In one preferred embodiment, a pouring spout attachment for a container having a U-shaped or C-shaped cut formed partially through a selected panel thereof, includes an integrally moulded unit with a projection formed at an inner surface thereof and a mounting flange formed at a lower end thereof enclosing a central bottom web having oppositely disposed U-shaped or C-shaped cuts formed therethrough, one of these being substantially aligned with the partial cut in the container panel, a pivot or hinge being formed by the omission of a cut between the oppositely disposed U-shaped or C-shaped cuts in the web, such that by pushing down on the central bottom web segment defined by the one U-shaped or C- shaped cut the underlying partial cut in the container panel is broken, and, in a fulcrum-and-lever fashion, the pivoting of that segment causes the central bottom web segment defined by the other U-shaped or C-shaped cut to snap past the projection and be retained thereby. The pouring spout attachment body may be adapted to receive a screw-on cap, or alternatively, a snap-on cap. In another preferred embodiment, a pouring spout attachment for a container having an opening formed in a selected panel thereof, includes a body with a shoulder-form projection at the inner surface thereof, a mounting flange at the lower end thereof, and a cover web on the upper end thereof, partially-cut perforations being formed between the cover web and the body for approximately two-thirds of the periphery thereof, a hinge line being formed laterally across the cover web, and an inwardly extending projection being formed on the cover web adjacent the hinge line, the shoulder at the inner surface of the body bounding a retaining pocket with the cover web for retaining the inwardly extending projection upon the latter being snapped past the shoulder when the cover web is pushed inwardly breaking the perforations. In order that the invention may be clearly understood and readily carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:- Figure 1 is a perspective view of a liquid-carrying container with a pouring spout attachment; Figure 2 is a perspective view of the Figure 1 container having a partial depth cut formed therein prior to having the pouring spout attachment secured thereon; Figure 3 is an enlarged cross-sectional view taken along the plane of the line 3-3 of Figure 1, and looking in the direction of the arrows; Figure 4 is a top view of the Figure 3 structure, with an end cap removed; Figure 5 is a bottom view of the Figure 3 structure taken along the plane of the line 5-5, and looking in direction of the arrows; Figure 6 is a view similar to Figure 3, but illustrating a different operational condition; Figure 7 is a view similar to Figure 3, illustrating an alternative embodiment of the body and end cap portions of the attachment; Figure 8 is a perspective view similar to Figure 1 but of a modified embodiment of the container and the pouring spout attachment; Figure 9 is a perspective view of the Figure 8 embodiment of the container showing an opening formed in a top panel thereof; Figure 10 is an enlarged cross-sectional view taken along the plane of the line 10-10 of Figure 8, and looking in the direction of the arrows; and Figure 11 is a top view of the Figure 10 embodiment. Referring now to the drawings in greater detail, Figure 1 illustrates a carton 10 including a pouring spout attachment 12 mounted on an upper panel 14 thereof. Prior to mounting the spout attachment 12 on the panel 14, as shown in Figure 2 a U-shaped partial depth cut 16 is made on the panel and formed in any suitable manner, such as by either a laser or a die. The partial depth cut 16 defines a panel segment 18. The pouring spout attachment 12 is illustrated more specifically in Figures 3-5 as including a cylindrical body 20 having a mounting flange 22 formed thereon and secured to the panel 14 to surround the periphery of the U-shaped cut 16. A shoulder 24 is formed adjacent the flange 22. Threads 26 are formed around the outer surface of the cylindrical body 20. A tang or projection 28 of a predetermined width is formed on the inner surface of the body 20 at a predetermined height therein. Moulded as an integral end wall of the Figures 3-5 structure inward of the mounting flange 22 is a web 30 having cuts formed therethrough consisting of parallel sides 32 and 34, with arcuate ends 36 and 38, defining a flap 39. A pivot or hinge axis 40 is formed by virtue of oppositely disposed thicker moulded segments 42 remaining uncut at a predetermined location along the sides 32 and 34. The axis 40 imaginarily divides the flap 39 into a minor segment 41 and a major segment 43. A rib 44 is formed on the flap 39 along the longitudinal centre line thereof. The spout attachment 12 is seated on the carton panel 14, with the cut edges 32, 34 and 36 positioned adjacent the U-shaped cut 16. An internally threaded cap 46 is threadedly mounted on the external threads 26, abutting against the shoulder 24. An alternative embodiment is shown in Figure 7, as including a shorter cylindrical body 48 than the above mentioned body 20, with the same mounting flange 22 and adjacent shoulder 24. An outwardly protruding annular bead 50 is formed adjacent the upper end of the body 48. A snap cap 52 includes an inwardly extending annular ridge 54 formed a predetermined distance below the top end thereof. The predetermined distance is such that the internal ring 54 is adapted to snap over the external bead 50 of the body 48, to seat the cap 52 on the shoulder 24. A tamper-evident full-round strip 56 is formed around either the threaded cap 46 or the snap cap 52 just above the shoulder 24. An optional tab 58 or like means may be formed on a selected edge portion of the mounting flange 22 to facilitate the proper orientation of the cut 32, 34 and 36 directly over the partial depth cut 16 on the container panel 14. After the carton 10 has been filled and sealed in the usual manner, the pouring spout attachment 12 can be opened as shown in Figure 6 as follows: The tamper-evident ring 56 is broken. The screw cap 46 is then threadedly removed from the threaded body 20. (In case of the alternative embodiment, the snap cap 52 is pried off the bead 50 of the body 48) . Thereafter, downward force is applied to the rib 44 at the point P (Figure 3) . Such force causes the flap 39 to pivot downwardly in a counterclockwise movement about the axis 40, breaking the remaining thickness beneath the cut 16 of the carton panel 14, around the carton panel segment 18. The counterclockwise movement about the axis 40 is such that the minor segment 41 of the flap 39 is pivoted upwardly until its end at 38 snaps past the projection 28, thereby to retain the flap 39 in the fully open position. Any closure thereafter, before the carton's contents are emptied, is by replacing the screw cap 46 or the snap cap 52, with the enclosed rib 44, flap 39, and carton panel segment 18 retained in the open condition. Referring now to Figures 8-11, a further embodiment of a pouring spout attachment 60 (Figure 8) for a carton 62 is disclosed. Prior to mounting the spout attachment on an upper panel 64, an opening 66 (Figure 9) is formed in the panel. The pouring spout attachment 60, as more clearly shown in Figure 10, includes a cylindrical body 68 having a mounting flange 70 formed thereon and secured to the panel 64 to surround the periphery of the opening 66. A cover web 72 is integrally formed on the upper end of the cylindrical body 68. Partial depth cuts 74 (Figure 11) form a common edge between the cover web 72 and the body 68 for approximately two-thirds of the periphery thereof. A score line or stepped edge forms a flexible hinge 76 (Figure 11) laterally across the cover web 72 between the ends of the arcuate line of perforations 74. A downwardly extending projection 78 (Figure 10) is formed on the inner surface of the cover web 72 on the perforation side of the flexible hinge 76. A shoulder 80 bounds a retaining pocket 82 at the inner surface of the cylindrical body 68 directly opposite the centre of the line of perforations 74. The pouring spout attachment 60 is opened by manually pressing down on the cover web 72 at the middle of the perforations 74, as shown by the arrow F in Figure 10. Once the major portion of the cover web 72 reaches a substantially vertical attitude, as shown in phantom in Figure 10, the projection 78 will have snapped past the shoulder 80 to become confined in the retaining pocket 82 and, thus, retain the flap 72/78 in an open condition. It should be apparent that the pouring spout attachments described with reference to the drawings may be readily forced inwardly while automatically providing an interference engagement of two components which retain the spout in an open condition. It should be further apparent from Figures 1 to 6 that the flap which provides a fulcrum-and-lever effect of opening at one inwardly forced end and causing an interference connection at the other outwardly projecting end may have its outer surface formed in the same plane as that of the external mounting flange. It should be still further apparent that the pouring spout attachments of the drawings are substantially simpler and more compact than the prior art arrangement disclosed in US-A-4, 934,590 referred to above.

Claims: CLAIMS 1. A pouring attachment for attaching to a wall of a container, comprising an inner body (39; 72,78) in the form of a flap (39;72,78), an outer body (20;48;68) bounding a pouring zone and extending around said flap (39;72,78), and hinge means (42;76) nearer one side of said pouring zone than the opposite side of said pouring zone and mounting said flap (39;72,78) in said outer body (20;48;68) for turning, about an axis (40;76) extending transversely of said outer body (20;48;68), between a flow-obturating position in said pouring zone and a flow-enabling position, and a detent (28;80) on said outer body (20;48;68), characterized in that said detent (28;80) is nearer said one side than said opposite side and said flap (39;72,78) has a portion (41;78) adapted to engage said detent (28;80) whereby said flap (39;72,78) is retained in said flow-enabling position following turning of said flap (39;72,78) from said flow- obturating position to said flow-enabling position. 2. An attachment according to claim 1, wherein said flap (39;72,78) comprises a major segment (43;72) at one side of said axis (40;76) and a minor segment (41;78) at another side of said axis (40;76) and wherein said minor segment (41;78) serves to engage said detent (28;80) on upward movement of the minor segment (41;78) to retain said flap (39;72,78) in said flow-enabling position. 3. An attachment according to claim 2, wherein said minor segment (41) is substantially co-planar with said major segment (43) . 4. An attachment according to claim 2, wherein said minor segment (78) is inclined to said major segment (72) . 5. An attachment according to claim 4, wherein said outer body (68) includes a pocket (82) containing said detent (80) and serving to receive said minor segment (78) in said flow- enabling position of said flap (72,78). 6. An attachment according to claim 5, wherein said outer body (68) includes a tubular part (68) encircling said pouring zone and closed at one end by a web comprised of said major segment (72) and a wall of said pocket (82) , said hinge means (76) being at a junction between said major segment (72) and said wall of said pocket (82) , and a line of weakness (74) extending along a junction between said tubular part (68) and said major segment (72) and being frangible to permit turning of said flap (72,78) about said hinge means (76) from said flow-obturating position towards said flow- enabling position. 7. An attachment according to any one of claims 1 to 5, wherein a through-cut (32-38) is formed between adjacent inner and outer peripheral edges of said outer body (20;48) and said flap (39), respectively. 8. An attachment according to any one of claims 1 to 5, wherein a partial-depth cut (74) is formed between adjacent inner and outer peripheral edges of said outer body (68) and said flap (72,78), respectively. 9. A combination comprising: ( i) a container (10; 62) having a wall (14; 64), and (ii) a pouring device (12; 60) at the outside of said wall (14; 64) and comprising an inner body (39;72, 78) in the form of a flap (39;72,78), an outer body (20;48;68) bounding a pouring zone and extending around said flap (39;72,78), which occupies a flow-obturating position in said pouring zone, hinge means (42;76) nearer one side of said pouring zone than the opposite side of said pouring zone and mounting said flap (39;72, 78) in said outer body (20;48; 68) for turning, about an axis (40;76) extending transversely of said outer body (20;48;68), between said flow-obturating position in said pouring zone and a flow-enabling position, and a detent (28;80) on said outer body (20;48;68), characterized in that said detent (28;80) is nearer said one side than said opposite side and said flap (39;72,78) has a portion (41;78) adapted to engage said detent (28;80), whereby said flap (39;72,78) is retained in said flow-enabling position following turning of said flap (39;72,78) from said flow- obturating position to said flow-enabling position. 10. A combination according to claim 9, wherein said flap (39;72, 78) comprises a major segment (43;72) at one side of said axis (40;76) and a minor segment (41;78) at another side of said axis (40;76) and wherein said minor segment (41;78) serves to engage said detent (28;80) on upward movement of said minor segment (41;78) to retain said flap (39;72,78) in said flow-enabling position. 11. A combination according to claim 10, wherein said minor segment (41) is substantially co-planar with said major segment (43) . 12. A combination according to claim 10, wherein said minor segment (78) is inclined to said major segment (72) . 13. A combination according to claim 12, wherein said outer body (68) includes a pocket (82) containing said detent (80) and serving to receive said minor segment (78) in said flow- enabling position of said flap (72,78) . 14. A combination according to claim 13, wherein said outer body (68) includes a tubular part (68) encircling said pouring zone and closed at its outer end by a web comprised of said major segment (72) and a wall of said pocket (82) , said hinge means (76) being at a junction between said major segment (72) and said wall of said pocket (82), and a line of weakness (74) extending along a junction between said tubular part (68) and said major segment (72) and being frangible to permit turning of said flap (72,78) about said hinge means (76) from said flow-obturating position towards said flow- enabling position. 15. A combination according to any one of claims 9 to 13, wherein a through-cut (32-38) is formed between adjacent inner and outer peripheral edges of said outer body (20;48) and said flap (39) , respectively, and a weakened, but imperforate, portion (18) of said wall (14) is present in said pouring zone. 16. A combination according to any one of claims 9 to 13, wherein a partial-depth cut (74) is formed between adjacent inner and outer peripheral edges of said outer body (68) and said flap (72,78), respectively, and an opening (66) is formed through said wall (64) in said pouring zone.

Inventors: OWEN BARRY CHARLES, PAPE LESLIE, OWEN, BARRY, CHARLES, PAPE, LESLIE
Applicants: ELOPAK SYSTEMS, ELOPAK SYSTEMS AG
Application year: 1996
Main classification: B65D5
IPC codes: B65D5, B65D47