Beverage container havinging interior secondary chamber for foam generation and method for producing same
AssigneeCarlsberg-Tetley Brewing Limited
InventorsGraham Fuller, Anthony John Banks, Raymond Gale Anderson
Life of this patent
Estimating the term…
Abstract
A container of beverage sealed under pressure is provided with a secondary chamber in the form of a hollow insert adapted to provide a flow of gas through an orifice into the beverage when the container is opened. The insert is in the form of an elongate tubular member whose axis extends around an axis corresponding generally to the axis of the container.
Claims19
A cylindrical container of beverage sealed under pressure, the container having means defining a secondary chamber in the form of a hollow insert adapted to store a gas therewithin and forming an orifice therein, the insert having means for providing a flow of the gas through the orifice into the beverage when the container is opened, wherein the insert is in the form of an elongated tubular member whose axis extends around a central axis of the container.
A method of manufacturing an insert for use in a cylindrical container of beverage sealed under pressure, the insert having means provided with a supply of a pressurized inert gas to provide a flow of the inert gas into a beverage in the container when the container is opened so as to promote formation of foam;
- forming a continuous tube;
- providing the tube with an inert gas atmosphere;
- sealing the tube at intervals to define a plurality of elongate gas filled inserts;
- and separating the inserts from each other when desired.
Apparatus for manufacturing an insert for use in a cylindrical container of beverage sealed under pressure, the insert having means provided with a supply of a pressurized inert gas to provide a flow of the inert gas into a beverage in the container when the container is opened so as to promote formation of foam, the apparatus comprising in combination:
- means for extruding a plastic tube, a mandrel over which the tube is passed into a moving mold having a corrugated profile, means connected to a source of the inert gas for blowing the inert gas into the tube in the mold, and means for sealing the gas filled tube into a plurality of elongate tubular inserts.
An insert for use in a cylindrical container of beverage sealed under pressure, the insert having means provided with a supply of a pressurized inert gas to provide a flow of the inert gas into a beverage in the container when the container is opened so as to promote formation of foam, wherein the insert is in the form of an elongate hollow tube of food grade material, the tube being sealed at both ends and provided with a restricted orifice intermediate its ends, the insert being filled with an inert gas and being sufficiently rigid to resist collapse when subjected to a pressure difference of 2 bar between its exterior and interior.
Dependencies are inferred from the claim text.