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EP-4739441-A1 - CAP FOR DISPENSERS OF PRODUCT IN VAPORIZED OR AEROSOL FORM, CAP/PRODUCT DISPENSERS ASSEMBLY AND METHOD FOR MANUFACTURING SUCH A CAP

EP4739441A1EP 4739441 A1EP4739441 A1EP 4739441A1EP-4739441-A1

Abstract

The invention relates to a cap (10) for a dispenser (20) of product in vaporized/aerosol form, the cap (10) being made of at least one material based on plant fibre and in particular based on paper, the cap comprising an axisymmetric cylindrical skirt (11), one base (12) of which is closed and the other base (13) of which is open to receive an end (21) of the dispenser (20). The cylindrical skirt (11) has successive first and second circumferential portions respectively having first and second internal diameters (d2, d3) of reduced size with respect to a mean internal diameter (d1) of the rest of the cylindrical skirt, the first and second circumferential portions being arranged spaced apart from one another in such a way as to be able to receive a rib (22) formed on the end (21) of the dispenser (20) when the cap (10) closes the end of the dispenser (20).

Inventors

  • WIMBEE, François
  • MEIGNAN, MICHEL

Assignees

  • Cartonnages et Plastiques Wimbee

Dates

Publication Date
20260513
Application Date
20240705

Claims (9)

  1. 1. Cover (10) for a dispenser (20) of product in vaporized/aerosol form, the cover (10) being made of at least one material based on plant fiber and in particular based on paper, the cover comprising a cylindrical skirt (11) of revolution of which one base (12) is closed and the other base (13) is open to receive one end (21) of the dispenser (20), the cover (10) being characterized in that the cylindrical skirt (11) has a first and a second successive circumferential portion having respectively a first and a second internal diameter (d2, d3) whose dimension is reduced with respect to that of an average internal diameter (dl) of the rest of the cylindrical skirt, the first and the second circumferential portion being arranged spaced from each other in such a way as to be able to accommodate a rib (22) arranged on the end (21) of the dispenser (20) when the cover (10) closes the end of the dispenser (20).
  2. 2. A cover (10) for a dispenser (20) according to claim 1, wherein the dispenser (10) is an aerosol canister and wherein the rib (22) is a rolled neck of the aerosol canister.
  3. 3. Cover (10) for dispenser (20) according to claim 1 or 2, in which the at least one plant fiber-based material from which the cover is made is spiral cardboard.
  4. 4. Cover (10) for dispenser (20) according to any one of claims 1 to 3, in which the plant fiber-based material is at least partly coated with a finishing layer and/or a layer of a waterproofing material, such as a varnish or a resin.
  5. 5. A cover (10) for a dispenser (20) according to any one of claims 1 to 4, wherein the first and second internal diameters are both less than the average internal diameter of the remainder of the cylindrical skirt of at least 0.5 mm, preferably at least 0.8 mm, even more preferably at least 1.2 mm.
  6. 6. Cover (10) for dispenser (20) according to any one of claims 1 to 5, in which the first and second circumferential portions (15, 16) are separated from each other by a distance of between 1 and 8 nm, preferably between 2 and 6 mm and can advantageously be separated by a distance substantially equal to 4 mm.
  7. 7. A cap (10)/dispenser (20) assembly for a spray/aerosol product comprising a cap according to any one of claims 1 to 6 and a dispenser (20) for a spray/aerosol product, the dispenser (20) for a spray/aerosol product having an end intended to be received by an open base (13) of the skirt (11) and a rib (22) provided on the end (21) of the dispenser (20), wherein the first and second circumferential portions are spaced apart to be able to receive the rib (22) provided (22) on the end (21) of the dispenser (20) when the cap (10) closes the end of the dispenser (20).
  8. 8. Assembly according to claim 7, in which the product dispenser (20) is an aerosol can, the rib (22) being a rolled neck of the aerosol can.
  9. 9. Method for manufacturing a cover for a dispenser (20) of product in vaporized/aerosol form comprising the following steps: providing a cylindrical skirt (11) of revolution made of at least one material based on plant fiber and in particular based on paper, forming on the skirt a first and a second successive circumferential portion having respectively a first and a second internal diameter (d2, d3) whose dimension is reduced with respect to that of an average internal diameter (dl) of the rest of the cylindrical skirt, the first and the second circumferential portion being arranged spaced apart from each other so as to be able to accommodate a rolled neck of the dispenser (20) between them, wherein the cover thus formed has its cylindrical skirt (11) which comprises a closed cylinder base, the other base (13) being open to receive one end of the dispenser (20).

Description

Description Title: Cover for dispensers of product in vaporized or aerosol form, cover/product dispenser assembly and method of manufacturing such a cover Technical field [001] The invention relates to the field of closing dispensers of products in vaporized or aerosol form and in particular aerosol cans. [002] Thus the invention relates more specifically to a cover for a dispenser of product in vaporized or aerosol form, a cover/product dispenser assembly and a method of manufacturing such a cover. State of the prior art [003] The closure of dispensers of products in vaporized or aerosol form, such as aerosol cans, is generally made from plastic caps. However, if such dispensers, when made of tinplate or aluminum, can be easily recycled, this is not the case for their caps. [004] In order to limit the carbon footprint of such covers and promote their recycling, it has been considered to produce them in materials based on plant fiber and in particular paper. It is this type of solution which is described in particular in documents KR2023040367A and JP2021160774A. [005] According to these documents, such a plant fiber cover comprises a cylindrical skirt of revolution, one base of which is closed, the other base of which is open to accommodate the distributor. The cover is held on the end of the distributor by providing at the open base of the skirt an edge rolled inwards in order to reinforce the skirt at the latter base. [006] In such a configuration, it is this single rolled edge which abuts on the spherical dome of the aerosol cans on the basis of a wedge effect during vertical compression. Thus, if such caps allow easy recycling, since they are made in plant fibers, they do not have a perfect hold, since it is only obtained by this unique corner effect. Disclosure of the invention [007] The invention aims to remedy this drawback and thus has as its object the provision of a cover which, while allowing easier recycling compared to covers made of plastic material, has better support on the end of a dispenser of product in vaporized or aerosol form when this cover closes said end. [008] The invention relates to this end to a cover for a dispenser of a product in vaporized or aerosol form, the cover being made of at least one material based on plant fiber and in particular based on paper, the cover comprising a cylindrical skirt of revolution of which one base is closed and the other base is open to receive one end of the dispenser, the cylindrical skirt having a first and a second successive circumferential portion having respectively a first and a second internal diameter whose dimension is reduced with respect to that of an average internal diameter of the rest of the cylindrical skirt, the first and the second circumferential portion being arranged spaced from each other in such a way as to be able to accommodate a rib arranged on the end of the dispenser when the cover closes the end of the dispenser. [009] With such first and second circumferential portions of reduced diameter of the cylindrical skirt, the rib of the dispenser, such as a rolled neck of a dome of an aerosol can, is retained by the latter. This results in a better retention of the cap on the end of the dispenser than that obtained by simple wedge effect implemented by the plant fiber caps of the prior art. In addition, the present cap being made of plant fiber, its recycling is facilitated. [010] According to the invention, each of the first and second circumferential portions can take the form of a groove arranged on the outer periphery of the cylindrical skirt. [011] The dispenser may be an aerosol canister and wherein the rib is a rolled neck of the aerosol canister. [012] Such an aerosol canister particularly benefits from the cover according to the invention, since it comprises, by its structure, a rib capable of cooperating with the cover which is the rolled neck of the aerosol canister. [013] The at least one plant fiber-based material from which the cover is made may be spiral cardboard. [014] Such spiral-wound cardboard is particularly suitable for forming the skirt of the hood since with such a design the skirt is unlikely to deform under radial stresses. [015] The plant fiber-based material is at least partly coated with a finishing agent and/or a waterproofing material, such as a varnish or a resin. [016] Such a coating makes it possible to adapt the finish of the cover according to the needs and appearance of the dispenser and, if necessary, to provide it with protection against humidity and possible accidental releases of product. [017] The first and second internal diameters may both be less than the average internal diameter of the remainder of the cylindrical skirt by at least 0.5 mm, preferably at least 0.8 mm, even more preferably at least 1.2 mm. [018] Such a dimension of the first and second diameter provides a particularly optimized hold of the cover on the distributor. [019] The first and second circumferential p