US 10,414,550 B2 · Closure for a product-retaining container

Abstract

The disclosure relates to a synthetic closure for a product-retaining container constructed for being inserted and securely retained in a portal-forming neck of said container, said closure comprising at least a core member comprising at least one thermoplastic polymer, and at least one peripheral layer at least partially surrounding and intimately bonded to at least one surface of the core member, said peripheral layer comprising at least one thermoplastic polymer, wherein the synthetic closure is formed by extrusion, and at least one of the core member and the peripheral layer comprises a plurality of cells, and wherein the synthetic closure comprises cork powder.

Claims27

Dependent claims

A synthetic closure for a product-retaining container constructed for being inserted and securely retained in a portal-forming neck of said container, said closure comprising:

a. a core member comprising at least one low density thermoplastic polymer having an unfoamed density in a range of from 0.7 g/cm3 to 1.5 g/cm3, and
b. at least one peripheral layer at least partially surrounding and intimately bonded to at least one surface of the core member, said peripheral layer comprising at least one thermoplastic polymer, wherein
the synthetic closure is formed by extrusion,
at least one of the core member and the at least one peripheral layer comprises a plurality of cells, and the synthetic closure comprises cork powder.

1 more element

A closure produced according to a method comprising:

a. providing a core member composition comprising at least one low density thermoplastic polymer having an unfoamed density in a range of from 0.7 g/cm3 to 1.5 g/cm3;
b. combining the core member composition with cork powder to obtain a core member—cork powder composition;
c. providing at least one blowing agent to the core member composition or to the core member—cork powder composition to obtain a composition comprising the at least one low density thermoplastic polymer and the at least one blowing agent;
d. heating one of the core member composition or the core member—cork powder composition to obtain a heated composition;
e. extruding a continuous, elongated, substantially cylindrically shaped length of the heated composition to obtain, as a core member, a continuous, elongated length of thermoplastic polymer having a cylindrical surface;
f. providing a peripheral layer composition comprising at least one thermoplastic polymer;
g. combining the peripheral layer composition with cork powder to obtain a peripheral layer—cork powder composition;
h. extruding a separate and independent peripheral layer of the peripheral layer—cork powder composition separately to, co-axially to and in intimate bonded engagement with the continuous, elongated length of thermoplastic polymer, said separate and independent peripheral layer peripherally surrounding and substantially enveloping the cylindrical surface of the continuous, elongated length of thermoplastic polymer to obtain a multi-component elongated structure having a cylindrical surface;
i. cutting the continuous, elongated length of thermoplastic polymer or the multi-component elongated structure in a plane substantially perpendicular to a central axis of said multi-component elongated structure to obtain a closure;
and
j. printing, coating, or post-treating at least one of the continuous elongated length of thermoplastic polymer, the multi-component elongated structure and the closure.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/175,266Filed 7 Feb 2014 · us provisional application

Priority

8 Feb 2013

Published

US 2014/0224759 A114 Aug 2014

Granted

17 Sep 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification33 codes

B65D 39/0011
Made in one piece: from natural or synthetic cork, e.g. for wine bottles or the like
B32B 1/08
Layered products having a non-planar shape: tubular products
B32B 3/04
Characterised by features of form at particular places, e.g. in edge regions: characterised by at least one layer folded at the edge, e.g. over…
B32B 25/045
Comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of foam

Closure for a product-retaining container

Life of this patent

Closure for a product-retaining container

Life of this patent

Abstract

Claims27