The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2003
Filed:
Dec. 29, 1997
Carole Jane Dodd, Whitchurch, GB;
Robert Purdham, St. Albans, GB;
Vivien Jane Sargeant, Waltham Abbey, GB;
Guinness Brewing Worldwide Limited, London, GB;
Abstract
A method of packaging a beverage having gas in solution and a beverage package has a container containing the beverage to form a headspace . Floating on the beverage is a hollow spherical capsule having a restricted aperture . During sealing of the container by a top the headspace is pressurised (by a nitrogen dose ) and during such pressurisation the insert is raised relative to its natural floating position on the beverage to ensure that the aperture communicates with the headspace to pressurise the chamber of that insert. The aforementioned raising of the insert is preferably achieved by subjecting the insert to a centrifugal force during rotation of the container in seaming the top thereto or by magnetic attraction. Following pressurisation of the headspace the insert is lowered to float naturally on the beverage with its aperture submerged. During pressurisation the insert may take in a minimal volume of beverage from the container. When the container is opened by ring pull a pressure differential develops causing fluid under pressure to be ejected from the insert through the aperture into the beverage for liberating gas from solution and the development of froth on the beverage.