Closure system for lidded containers

A closure system for lidded containers, the system comprising:

• a body (1) having a neck (4) that includes at least one opening (2) and at least one mouth (7) defining the opening (2), and a recess (5) formed in an outer wall of the neck (4), both the mouth (7) and the recess (5) being entirely elliptical in shape with a major axis of the elliptical mouth (7) and the recess (5) being 5-15% longer than a minor axis thereof;
• and
• an elliptical lid (3) including a corresponding elliptical extension (6) directed towards an inner part of the lid (3), a major axis of the elliptical extension (6) being 5-15% longer than a minor axis thereof;
• wherein:
• the ellipse of the mouth (7) is smaller than the ellipse of the lid (3),
• the entire recess (5) has a frustoconical configuration that defines an angle α, and
• the extension (6), in its inner face (9), which is located opposite the recess (5), has an inverted frustoconical configuration with respect to the frustoconical configuration of the recess (5), having an angle β, said extension (6) comprising a salient flank (8) that is located in the recess (5), which when in a closed position at least part of the extension (6) rubs against the recess (5) and locks the lid (3 to the body (1), when in an open position, when rotating the lid (3) around the rotation axis (14) of the body (1) in an opposite direction to the one that had been applied for closing, the lid (3) is released from the body (1), and when continuing the rotation in the same direction the lid (3) is locked again to the body (1) rubbing a section of the extension (6) with the recess walls (5).