Patent ID: 7618209

Claim:
A roll-on dispenser for a liquid comprising a bottle and a removable cap, the bottle having an interior and a first end which defines a housing for a rotatable roller, said housing having a chamber within which the roller can rotate having an inward end in fluid communication with the interior of the bottle and comprising a lateral sealing shelf dimensioned to prevent the roller being urged into the interior of the bottle when subject to inward axial force, an opposed outward end dimensioned to retain the roller and a side-wall having an interior surface extending between the outward end and the inward end the roller having a segment projecting outside the housing, the cap having means to urge the roller axially towards the sealing shelf, wherein the sealing shelf comprises an annular ring having a multiplicity of axially extending notches at its upward edge, wherein the notches in the sealing shelf cause fluid flow perturbation.