Patent ID: 6810788
Filing Date: 2004-11-02
Classification: B65D

Abstract:
A beverage cartridge comprising:a container having a sidewall extending from a first surface and a lip provided at an open end of the container; a cover coupled to the lip of the container to cover the open end and seal the container; a step formed in the sidewall; a laminated filter structure coupled to the step, the laminated filter structure subdividing the container to form a brewing chamber and a beverage receiving chamber, the laminated filter structure having a first filter element with a first edge portion, the first filter element being comprised of cellulose fibres, a second filter element with a second edge portion, the second filter element being comprised of strands of extruded polypropylene fibres that are joined together to inhibit separation of the strands, and a seal provided between the first edge portion and the second edge portion, the second filter element having a higher wet strength than the first filter element and the second filter element being located downstream of the first filter element, such that the elasticity of the second filter element permits expansion of the second filter element under pressure while providing support for the first filter element; and a beverage powder contained in the brewing chamber, wherein the container is pierceable to allow injection of liquid into the brewing chamber and to allow prepared beverage to be extracted from the container.