JPS6449514A - Coffee extractor - Google Patents

Abstract

PURPOSE: To establish a uniform brewing condition and enhance the brewing efficiency by equipping the bottom member of a vessel with a notch to be blocked with a substance exhibiting physical behavior for the heat applied, and generating a level difference at the notch by the pressure of water accommodated in the vessel when the notch blocked is opened. CONSTITUTION: When hot water is poured in, a covering material 4 for the bottom part la is melted or softened, and a notch 3 which has been blocked is opened. A lid piece 1c is depressed by the water pressure to generate a large gap (flow port) in the bottom 1a, so that the hot water in the body vessel 1 flows down into the brewing part 5. When the hot water contacts with coffee powder and they are mixed together, the coffee liquid having passed through a filter drips onto a cup, and at the same time, the coffee powder 6 generates a large quantity of bubbles to cause volume expansion gradually, so that an internal pressure is produced in the brewing part 5, and when a certain period of time has passed, the lid piece 1c is lifted against the water pressure. At the same time, the bubbles generated in the brewing part 5 are released into the body vessel 1, so that hot water passage in the part 5 becomes better to ensure that the brewing is executed uniformly.