Hinged closure device and a container
A closure device comprising a plastic lid which is articulated to a skirt that is designed to surround a neck of a container. A majority of the surface of the lid is made up of an external convex surface that is provided with a concave recess which is disposed more or less opposite an area in which the lid is articulated to the skirt. One section of the lid can rest against a heel which is provided close to an upper edge of the skirt so as to lock the lid in a position in which the device is completely open.
1. A closure device for a container provided with a neck, said closure device comprising; a lid made of plastic material, articulation means for connecting said lid along a portion thereof to a skirt designed to surround and be mounted to the neck, said lid including at least one projection along said portion thereof that engages against a tongue member provided along an upper edge of said skirt when said lid is moved from a closed position relative to the neck of the container to a completely open position relative to the neck, and whereby said tongue is thereby forced against the neck to thereby create a reactive force against said at least one projection to retain said lid in said completely open position.
2. The device according to claim 1 wherein a geometry and positioning of said projection and of said tongue member are such that an angle of said lid relative to said closed position, when said lid is completely open and retained, is greater than or equal to 180°.
3. The device according to claim 2 wherein said projection is formed between two elastic lamellae that form said articulation means and function as hinges connecting said lid ( 11 ; 511 ; 811 ) and said skirt ( 12 ; 512 ; 812 ).
4. The device according to claim 1 wherein said tongue member is in one piece with said skirt and extends upwardly from an upper edge ( 123 ) of said skirt.
5. The device according to claim 4 wherein said tongue member is adapted to come into abutment, least one under the effect of an effort (F 5 ), exerted by said at least one projection of said lid ( 11 ), against an outer radial surface of said neck ( 502 ) and to transmit to said at least one an effort of reaction (F 6 ) generated by said neck.
6. The closure device of claim 1 wherein said lid includes a convex outer face over a major part of a surface thereof, said outer face being provided with a concave depression made substantially opposite said portion thereof where said articulation means connects said lid on said skirt.
7. The device according to claim 6 wherein surface characteristics of said depression are different from surface characteristics of said convex part of said outer face.
8. The device according to claim 7 wherein said depression has a rougher surface than said convex part.
9. The device according to claim 6 wherein said depression is connected to an upper face ( 116 ) of a nose projecting radially from said lid.
10. A container comprising a container body provided with a neck, and a closure device according to claim 6 .
11. A container comprising a container body provided with a neck, and a closure device according to claim 1 .
12. The device according to claim 3 wherein an elastic effort (F 5 ) is exerted by said lamellae urging said at least one projection against said tongue member.