Carbonated beverage container

Details Carbonated beverage container Carbonated beverage container

1992-07-13

1994-03-01

Tentoni, Leo B.

Food or edible material: processes, compositions, and products

Packaged or wrapped product

Having consumer oriented diverse utility

206222, 220270, 220501, 220521, 426115, 426123, 426131, B65B 3100, B65D 1700, B65D 2500

Patent

active

052905748

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

When dispensing carbonated beverages, particularly draught stout, it is desirable to obtain a close-knit creamy head. This contributes to a creamy taste and adds considerably to the customer appeal. Traditionally such heads are only obtained when dispensing such beverages from draught. Another factor that considerably enhances the appeal is the way in which, when dispensing from draught, small bubbles are intimately mixed with the body of the beverage as it is dispensed and then, after completion of dispensing they gradually separate out to form this close-knit creamy head.
The formation of such small bubbles liberated throughout the body of the beverage during dispensing can 5 be encouraged by causing shear of the liquid with resulting local pressure changes which causes release of small bubbles of controlled and uniform size. Over the years many proposals have been made to increase and control the generation of such heads on beverages. Our own earlier British Patent specification 1378692 describes the use of an ultrasonic transducer to subject the beer to shear immediately before it is dispensed into a drinking vessel and describes the way that by subjecting the initially dispensed portion of beer to ultrasonics the small bubbles released from this initial portion then gradually float up through the remainder of the beer forming nucleation sites and triggering the generation of further small bubbles of controlled size.
There have been many other proposals such as those described in GB-A-1280240, GB-A-1588624 and GB-A-2211854 to encourage the formation of the required close-knit creamy head on beers and other carbonated beverages. However, most of these proposals are concerned with formation of head as the beer is dispensed from draught.
GB-A-1266351 describes a system for producing a draught type head when dispensing beer, or other carbonated beverage, from a can or bottle. In the arrangement described in this specification, the container includes an inner secondary chamber which is charged with gas under pressure either as part of the filling process in which the container is filled with beverage or by pre-charging the secondary compartment with gas under pressure and sealing it with a soluble plug made from a material such as gelatine which, dissolves shortly after filling. The secondary chamber includes a small orifice and the overall arrangement is such that, upon opening the container and so reducing the pressure in the main body of the container, gas from the secondary chamber is jetted via the orifice into the beer in the main body of the container so causing shear and liberating the required small bubbles which in turn act as nucleation sites to trigger release of similar bubbles throughout the entire contents in the can or other container. The arrangements described in this patent specification are somewhat complex mainly requiring the use of a separate charging step after filling to pressurize the secondary chamber with the result that this technique has not been adopted commercially.
GB-A-2183592 describes a different technique which has recently achieved success in the market place. In this system the container of a beverage includes a separate hollow insert with an orifice in its side wall. As part of the container filling process beer is deliberately introduced into the inside of the hollow insert through the orifice and the pressures of the inside of the insert and the main body of the container are in equilibrium. Upon opening the container the beer is jetted out through the orifice into the body of the beer and again acts to shear liquid in the container with the result that a number of small bubbles are liberated which, in turn, act as nucleation sites to generate a number of small bubbles throughout the entire contents of the container. When dispensing a beverage from such a container into a drinking vessel the liberation of small bubbles throughout the entire volume of the beverage as it is dispensed gives a similar appearance to dispensing the same bevera

REFERENCES:
patent: 3494141 (1970-02-01), Irwin et al.
patent: 3494142 (1970-02-01), Beck
patent: 3779372 (1973-12-01), de Lloret
patent: 4832968 (1989-05-01), Forage et al.

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