Food or edible material: processes – compositions – and products – Packaged or wrapped product – Having consumer oriented diverse utility
Patent
1995-08-17
1997-11-04
Derakshani, Philippe
Food or edible material: processes, compositions, and products
Packaged or wrapped product
Having consumer oriented diverse utility
426131, B65D 8500
Patent
active
056837321
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a liquid container which is designed to deliver a liquid, for example, a high quality carbonated beverage such as beer, ale, stout or lager, so that a rich creamy foam is formed on top of the liquid by virtue of gas under pressure which is forced through at least one restricted orifice in an insert in the container so that the discharge of the gas into the main body of liquid in the container causes fine gas bubbles to enter the liquid in the container to assist in the formation of such rich creamy foam. The present invention is also applicable to other carbonated liquids and non-carbonated liquids leg soft drinks such as, for example, fruit juices, squashes, colas, lemonades, milk and milk-based drinks, and other alcoholic drinks such as, for example, spirits, liqueurs, wine or wine-based drinks) where it is desired to produce release of a stream of gas bubbles into the liquid on opening of the container. The present invention further relates to a method of manufacturing such a liquid container.
GB-A-1266351 discloses a number of designs of beverage container where a secondary chamber is located in the beverage container and contains gas charged to a pressure substantially above atmospheric pressure. A number of embodiments are described. In one embodiment, the secondary chamber is permanently in communication with the container via the restricted orifice and is charged with gas under pressure at the time of filling of the container. In another embodiment, the secondary chamber is filled with gas and the restricted orifice sealed with gelatine or other non-toxic substance which is intended to retain the gas under pressure within the secondary chamber but which dissolves when in contact with the beverage in the container so as to open the restricted orifice. In a further embodiment, the restricted orifice is provided in a flexible wall of the chamber which is exposed to the pressure in the main body of the container, the arrangement being such that pressure in the main body of the container holds the region of the wall around the restricted orifice sealed against a grommet until the container is opened, whereupon the resultant release of pressure results in the seal being broken and permits the gas under pressure from the secondary chamber to jet into the beverage through the restricted orifice. For a variety of reasons, none of these designs have met with commercial success.
EP-A-0227213 discloses a beverage container wherein, instead of gas being jetted from the secondary chamber by way of a restricted orifice, carbonated beverage or carbonated beverage followed by gas is jetted through the restricted orifice in order to induce fine bubble formation in the main body of the beverage. The secondary chamber may be in the form of a moulded plastics hollow insert which, before use, is flushed with nitrogen to displace air therefrom which would otherwise cause oxidative spoilage of the beverage. The insert (with the restricted orifice facing downwardly) is then secured in place at the bottom of the container which at this stage is open at the top. The container is partially filled with the carbonated beverage, and then dosed with liquid nitrogen and sealed so that the liquid nitrogen evaporates to pressurise the sealed container. As a result of pressure equalisation, beverage derived from the main body of the container is forced into the insert so as to leave a pressurised headspace above the beverage in the insert. The sealed and pressurised container is then pasteurised, packaged and stored before distribution and sale. Such an insert is specifically designed to discharge beverage through the restricted orifice for the stated purpose of providing a greater efficiency in the development of the head in a liquid supersaturated with gas than will ejection of gas alone through the restricted orifice. However, it is now recognised that ejection of gas through the restricted orifice does produce better results, as acknowledged in EP-A-0520646 which discloses a similar insert to that used i
REFERENCES:
patent: 4524078 (1985-06-01), Bardsley et al.
patent: 4832968 (1989-05-01), Forage et al.
patent: 5584165 (1996-12-01), Wright
Anderson Iain Wallace
Baxter William Ronald Stuart
Edgson Raymond Anthony
Bass plc
Derakshani Philippe
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