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AssigneeLumson S.p.A.
InventorMatteo Moretti
Estimating the term…
A method for making a fluid substance container starting from a preform, the container coupled by a ring nut to a hermetic pump to form a fluid substance dispensing device, including heating and blow-moulding the preform to obtain the container; the preform formed of an external body and an internal body mutually assembled before being blow-moulded, the external body being cup-shaped with a first free end, the internal body being cup-shaped with a second free end having a flange whereby, when the internal body and external body are assembled, the flange abuts the first free end and protrudes a distance along an external perimeter of the external body near the free end, the external body being configured to form—once blow-moulded—the external recipient of the container while the internal body is configured to form a deformable bag housed inside the container, the ring nut having a undercut which engages the flange so that when the ring nut is removed the now empty deformable bag comes with it, in addition to the pump.
A method of making a container (1) of a fluid substance starting from a preform (2), the container (1) being associated by a ring nut (9) to a hermetic pump (P) to form a dispensing device of a fluid substance (30), comprising the steps of heating the preform and blowing it to obtain the container (1), the preform (2) being formed by an external body (3) and an internal body (4) mutually assembled via a coupling step before being blown, the external body (3) being cup-shaped and equipped with a first free end (5), the internal body (4) being cup-shaped and having a second free end (6) which has a flange (7) configured so that, when the internal body (4) is assembled to the external body (3), the flange (7) abuts against the first free end (5) and perimetrically protrudes (S) with respect to an external perimeter of the external body (3) in proximity of said free end (5), the external body (3) being configured to form, once blown, an outer vessel (3A) of the container (1) while the internal body (4) being configured to form a deformable bag (4A) housed inside the container (1), the ring nut (9) having an undercut (9A) which engages the flange (7) so that, when the ring nut (9) is removed from the container (1), after that it has been assembled on the container (1) to hold the pump (P), brings with it the empty deformable bag (4A) together with the pump (P), wherein the ring nut (9) and the pump (P) are associated with the container (1) already formed, characterized in that the inner body (4) and the outer body (2) are heated together and blown in a single step to form the container (1), and during blowing, the wall of the deformable bag (4A) only partially adheres to the outer vessel (3A) due to the presence of an air gap present in the preform (2), wherein suitable air passages (11A, 11B) allow air to be discharged during the coupling step between the outer body (3) and the inner body (4) to form the preform (2), wherein the same air passages (11A, 11B), during the blowing phase of the tube (2), are closed to ensure the maintenance of an air gap during the bottle forming.
Dependencies are inferred from the claim text.