Method for making a container for a fluid substance dispensing device and dispensing device for the said fluid substance

Patent metadata

Field	Value
Publication number	US-12005625-B2
Application number	US-202217847451-A
Country	US
Kind code	B2
Filing date	Jun 23, 2022
Priority date	Jul 2, 2021
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

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.

First claim

The invention claimed is:

1. 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 ( 3 A) of the container ( 1 ) while the internal body ( 4 ) being configured to form a deformable bag ( 4 A) housed inside the container ( 1 ), the ring nut ( 9 ) having an undercut ( 9 A) 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 ( 4 A) 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 ( 4 A) only partially adheres to the outer vessel ( 3 A) due to the presence of an air gap present in the preform ( 2 ), wherein suitable air passages ( 11 A, 11 B) 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 ( 11 A, 11 B), during the blowing phase of the tube ( 2 ), are closed to ensure the maintenance of an air gap during the bottle forming.

2. The method according to claim 1 , in which the external body ( 2 ), near the first free end ( 5 ), has a thread ( 8 ) for coupling with a counter-thread ( 9 B) of the ring nut ( 9 ).

3. The method according to claim 2 , wherein the undercut ( 9 A) is defined at the top of the counter-thread ( 9 B) of the ring nut ( 9 ).

4. The method according to claim 1 , in which air passages ( 11 A, 11 B) are provided between the internal body ( 4 ) and the external body ( 3 ) which put the exterior of the internal body ( 4 ) in communication with the outside of the container ( 1 ).

5. The method according to claim 4 , wherein the air passages ( 11 A) open on an upper surface ( 12 ) of the flange ( 7 ) or on a lower surface ( 13 ) of the flange ( 7 ) in abutment against said first free end ( 5 ) of the external body ( 3 ).

6. The method according to claim 1 , in which channels ( 12 ) are provided between the internal body ( 4 ) and the external body ( 3 ), located in correspondence with an area that will form a neck ( 13 ) of the container ( 1 ), the channels communicating with said passages ( 11 A, 11 B).

7. The method according to claim 1 , wherein between the pump (P) and the deformable bag ( 4 A) there is provided a sealing gasket ( 14 ) equipped with a first sealing lip ( 14 A) on the pump body (P) and a second sealing lip ( 14 B) on an internal surface of the deformable bag ( 4 A), or in which the sealing gasket ( 14 ) is equipped with its own flange ( 14 C) housed in a seat ( 15 ) provided on the flange ( 7 ) of the internal body ( 3 ).

8. The method according to claim 1 in which the inner body ( 3 ) is formed by two external layers ( 20 ) and a further layer ( 21 ) sandwiched between the external layers ( 20 ).

9. The method according to claim 1 , wherein the outer body ( 3 ) or the inner body ( 4 ) are made by injection molding.

Assignees

• Lumson Spa

Inventors

• Moretti Matteo

Classifications

• B29L2031/7158

  Bottles · CPC title

• B29L2009/001

  the layers being loose · CPC title

• B29C2045/1601

  the injected materials not being adhered or bonded to each other (B29C45/0017 takes precedence) · CPC title

• B29C45/16

  Making multilayered or multicoloured articles {(B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816)} · CPC title

• B05B11/1047

  the pump being preassembled as an independent unit before being mounted on the container · CPC title