Resumen
Roll-on type device for the application of exact doses of liquid and/or semi-solid formulations. The present invention relates to a roll-on device with which exact doses of liquid and/or semi-solid formulations can be dispensed on a surface, from a multi-dose container. The invention includes a non-return valve (4) that allows the filling of a volumetric space (2) prevents the dose, or part of it, from returning to the multi-dose container. The volumetric space (2) is delimited by a sphere (1) contained in a cylinder (3) and by a base (11), and houses an exact dose of the substance of interest. Also, the invention relates to a filling material that is included in the volumetric space (2) of the roll-on type device to allow the application of both liquid and semi-solid formulations, in exact doses and in a constant manner. (Machine-translation by Google Translate, not legally binding)