Screw-type closure systems with magnetic feature
A closure-container system comprising a screw-threaded inner cap that mounts to a screw threaded container, and an overshell that is enabled to rotate and translate relative to the inner cap. As the overshell rotates relative to the inner cap, one or more metallic magnets located in the overshell pull the cap toward one or more metallic elements associated with the container. The overshell and container make direct contact, so there is no unsightly gap. Also, the contact produces a satisfying, reassuring metallic “click” sound, accompanied by a luxurious tactile sensation that, together, dispel the silent ennui normally associated with rotating closures.
1. A container-closure system comprising:
a container ( 1 ) that comprises:
an internal reservoir ( 1 d ) that is suitable for holding a product,
a threaded neck ( 1 b ),
a shoulder ( 1 c ),
an opening ( 1 e ) in the neck of the container, and
one or more ferromagnetic elements ( 2 ) located in the area below the threads ( 1 a ) of the threaded neck ( 1 b );
a closure ( 11 ) that comprises:
an overshell ( 9 ) that comprises:
an interior surface ( 9 a ),
one or more cutouts ( 9 d ) located on the interior surface, wherein each cut comprises a taller section ( 9 t ), a shorter section ( 9 s ), and a ledge ( 9 j ); and
an inner shell ( 8 ) firmly connected to the interior surface ( 9 a ) of the overshell ( 9 ), such that it cannot move relative to the overshell;
an inner cap ( 6 ) that comprises:
screw threads ( 6 a ) for mounting to the container ( 1 ),
an outer surface ( 6 h ) that has one or more raised portions ( 6 d ) and snap fitments ( 6 e ), each raised portion and snap fitment being confined within one of the cutouts ( 9 d ) of the overshell ( 9 ); and
a rod ( 5 ) that depends from the inner cap into the internal reservoir ( 1 d ) of the container ( 1 ), the rod having an applicator head ( 4 ) attached thereto;
a spring ( 7 ) located between the inner cap ( 6 ) and the inner shell ( 8 ), that tends to bias the ledges ( 9 j ) against the snap fitments ( 6 e );
one or more magnets ( 10 ) firmly connected to the interior surface ( 9 a ) of the overshell ( 9 ), that tend to bias the overshell toward the ferromagnetic elements ( 2 );
wherein:
the overshell ( 9 ) is able to translate up and down relative to the inner cap ( 6 ) only when the raised portions ( 6 d ) of the inner cap are located in the taller sections ( 9 t ) of the cutouts ( 9 d ), and not when the raised portions are located in the shorter sections ( 9 s ).
2. The container-closure system of claim 1 wherein the one or more ferromagnetic elements ( 2 ) is a metal ring placed over the neck ( 1 b ) of the container ( 1 ), and resting on the shoulder ( 1 c ) of the container.
3. The container-closure system of claim 1 wherein each magnet is retained in a channel ( 9 b ) that is cut into the interior surface ( 9 a ) of the overshell ( 9 ), and that opens up onto the opened end ( 9 c ) of the overshell.
4. The container-closure system of claim 3 wherein the bottom of each magnet extends slightly below the opened end ( 9 c ) of the overshell ( 9 ).
5. The container-closure system of claim 1 wherein the magnet is a neodymium-iron-boron (NdFeB) magnet, having a magnetization grade of N45.
6. The container-closure system of claim 4 wherein when the inner cap ( 6 ) is fully seated on the container ( 1 ), there is a gap between the bottom ( 6 c ) of the inner cap and the shoulder ( 1 c ) of the container.
7. The container-closure system of claim 1 further comprising a lower shoulder ( 1 h ) and a metal collar ( 1 g ) that fits around the neck ( 1 b ) of the container ( 1 ), and rests on the lower shoulder to hide the metal ring ( 2 ).