초록 ▼

Devices are described for fitting into pressurized individually packaged beverages (typically canned beers, ales and stouts), by which gas at high pressure is stored within the package for jetting into the beverage as the package is opened to atmosphere. One embodiment comprises a length of tube (10

Devices are described for fitting into pressurized individually packaged beverages (typically canned beers, ales and stouts), by which gas at high pressure is stored within the package for jetting into the beverage as the package is opened to atmosphere. One embodiment comprises a length of tube (10) having a gas jetting orifice (14) which in use is submerged below the beverage in a pressurized can having a gaseous headspace, which can be used to charge the tube with gas during the passage of the filled can (16) along a conventional canning line, on which the can is inverted after filling which brings the orifice into the gaseous headspace. A more preferred design of device comprises a molded plastics capsule (34; 50;78) secured near the bottom of a can (20, 88) with an internal, preferably central, pipe (56; 62; 80) to provide a liquid seal to prevent loss of gas when the can is inverted from the upright position, and an airlock when the can is upright, to prevent beverage which has entered the capsule from leaving it when the can is opened to atmosphere. A further design of capsule (96) having a central internal pipe (98) and adapted to be pressurized solely by the ingress of beverage, which is fitted midway down the can (94) but which still only jets gas on opening, is also described.

대표청구항 ▼

A gas jetting device for fitting within a first beverage containing chamber which is to be sealed and pressurized in use and includes a base end on which it will normally stand upright, comprising a capsule defining a second chamber of smaller volume than the first chamber, which is adapted to be se

A gas jetting device for fitting within a first beverage containing chamber which is to be sealed and pressurized in use and includes a base end on which it will normally stand upright, comprising a capsule defining a second chamber of smaller volume than the first chamber, which is adapted to be secured within the first chamber at a position such that it will be wholly covered by a beverage when the first chamber has been filled and is standing on its base, an orifice permitting communication between the first and second chambers and through which gas trapped in the upper end of the capsule will be emitted as a jet of fine bubbles into the beverage to form or assist in the formation of a head thereon, when the first chamber pressure is reduced to atmospheric pressure as by opening it to dispense beverage therefrom, wherein the capsule is secured within the first chamber such that when the first chamber is upright: (1) the orifice is situated in the region of a lower end of said second chamber, and (2) internal passage means extends downwardly from just below an upper closed end of the second chamber to the said orifice so as to communicate the orifice directly with said upper end of the second chamber and any gas above any beverage which may have entered the second chamber.