Closure assembly with a cap having corrugated wings
A closure assembly for a container, comprises a spout ( 1, 3 ) and a rotational cap ( 2 ) injection moulded of plastic material. The cap comprises a top wall ( 2 a ) and a downward depending skirt ( 2 b ). The cap has two wings ( 5 ), which are integrally moulded of plastic material and extend vertically and outward in a lateral direction over a wing length in substantially opposite directions from an inner end to a tip. The wings each have a base portion, a center portion, a top portion, and opposite front and back sides. At least the center portion of each wing is connected to the skirt of the cap. The base portion and the top portion of each wing are substantially flat. The center portion of each wing comprise at least one corrugation ( 12, 12′, 12 ″) that extends along a part of the length of the wing and forms a groove on both sides of the wing, which grooves of the corrugation, as seen from a sideways view of the wing, together form an alternating waveform, e.g. a sinusoidal shape.
1 . A closure assembly for a container, comprising:
a spout having a spout body that is injection moulded from a plastic material, the spout body having, an attachment portion configured to be sealed or sealed to a container, a tubular neck, wherein a product passage extends through the attachment portion and the tubular neck of the spout, the tubular neck having a vertical main axis and forming a mouth at a top end of the product passage allowing dispensing of a product from the container, the tubular neck having an exterior side;
a rotational cap that is injection moulded from a plastic material and that is secured on or is to be secured on the tubular neck of the spout in a closed position of the rotational cap on the tubular neck such that the rotational cap seals the product passage, and removal of the rotational cap from the tubular neck of the spout by a user, tewill open the product passage, wherein the rotational cap is adapted to be manually rotated in an opening direction from the closed position to an open position;
wherein the rotational cap comprises a top wall and a downward depending skirt, the skirt having an interior side, an exterior side, and a lower edge remote from the top wall,
wherein the rotational cap has two wings, which are integrally moulded from a plastic material and extend vertically and outward in a lateral direction over a wing length in substantially opposite directions from an inner end to a tip,
wherein the two wings each have a base portion, a center portion, a top portion, a front side and a back sides, wherein the front side is opposite the back side, wherein the base portion is located below the center portion and the top portion is located above the center portion,
wherein at least the center portion of each wing is connected to the skirt of the rotational cap,
wherein the base portion and the top portion of each wing are substantially flat,
and wherein the center portion of each wing comprises at least one corrugation that extends along a part of the length of the wing and forms a groove on both sides of the wing, which the grooves of the corrugation, as seen from a sideways view of the wing, together form an alternating waveform.
2 . The closure assembly according to claim 1 , wherein, seen in a view from above, the at least one corrugation in the center portion of the wing tapers off towards the tip of the wing.
3 . The closure assembly according to claim 2 , the at least one corrugation in the center portion of the wing merges with the substantially flat base portion and the substantially flat top portion of the wing.
4 . The closure assembly according to claim 1 , wherein the at least one corrugation is substantially parallel to the lateral extending direction of the wings.
5 . The closure assembly according to claim 1 , wherein the one or more corrugations are perpendicular to the vertical main axis of the tubular neck at least in a closed configuration of the closure assembly.
6 . The closure assembly according to claim 1 , wherein the one at least one corrugation extends at an angle of less than 60 degrees with respect to the lateral extending direction of the wings.
7 . The closure assembly according to claim 1 , wherein the at least one corrugation extends at an angle of less than 45 degrees with respect to the lateral extending direction of the wings.
8 . The closure assembly according to claim 1 , wherein the at least one corrugation tapers off towards the tip of the wing along the length of the wing.
9 . The closure assembly according to claim 8 , wherein the tapering of the corrugation towards the tip of the wing along the length of the wing is such that the tip of the wing is substantially flat.
10 . The closure assembly according to claim 1 , wherein the largest height of the one or more corrugations is less than 80% of the largest height of the wing.
11 . The closure assembly according to claim 1 , wherein the one or more corrugations span the length of the center portion of the wing.
12 . The closure assembly according to claim 1 , wherein the depth and/or height of the one or more corrugations is largest at an inner part of the wing.
13 . The closure assembly according to claim 1 , wherein the largest depth and/or height of the one or more corrugations is around-2 mm to 5 mm.
14 . The closure assembly according to claim 1 , wherein the center portion of the wings is larger than the top portion and/or the base portion.
15 . The closure assembly according to claim 1 , wherein the center part of the wing comprises at least two corrugations.
16 . The closure assembly according to claim 1 , wherein the center part of the wing comprises corrugations formed in opposite directions, wherein the corrugations are offset from a main surface of the wing such that one of the two sides of the wing does not have any protrusions past its surface as a result of the corrugations.
17 . The closure assembly according to claim 1 , wherein the one or more corrugations, as seen from the side of the wing, have a sinusoidal shape.
18 . The closure assembly according to claim 1 , wherein the corrugations, as seen from the side of the wing, have a shape similar to a square wave.
19 . A container provided with the closure assembly according to claim 1 .