×

Extraction of coffee contained in sealed cartridges

  • US 5,242,702 A
  • Filed: 07/02/1991
  • Issued: 09/07/1993
  • Est. Priority Date: 07/27/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for extracting roast and ground coffee contained in a sealed cartridge comprising:

  • placing a cartridge, wherein the cartridge has a frustoconical shape and contains roast and ground coffee between a first cartridge face and a cartridge filter which separates the coffee from a second cartridge face, in a holder to support each of the second face and filter at their peripheries and so that the second face is positioned at a distance of up to 5 mm from a finger which is substantially centrally positioned relative to the second face, wherein the second face has a strength sufficient to deform and withstand, without tearing, a pressure in the cartridge upon extraction of greater than 1 bar but less than 10 bar; and

    piercing the first face with an injector and injecting a mixture of water and air from the injector under a pressure of from 1 bar to 10 bar into the cartridge and coffee to deform the second face in a direction away from the filter and towards the finger such that the second face is applied against the finger, against which it tears, to enable extraction liquid to flow through the filter without tearing the filter, and out the cartridge.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×