| 摘要 |
PURPOSE:To simplify extraction of coffee with high body and aroma by roasting coffee beans, grinding the roasted coffee beans, then containing the ground coffee powder together with water in a hermetically sealed container, decompressing the interior of the aforementioned container and subsequently returning the interior of the container to ordinary pressure. CONSTITUTION:Coffee powder (A) after roasting and grinding, together with water (B), is placed in a container 2 and an operating handle 38 is pressed and rotated with a shaft (38B) as the center of rotation. A piston 24 is then retreated into a cylinder 10 to open a suction valve body 21 of a suction valve 19. Air in the container 2 is subsequently passed through a suction port 9 to the outside to decompress the interior of the above-mentioned container. The aforementioned operating handle 38 is operated several times to regulate the internal pressure of the container to <=400mmHg and extraction is carried out. An opening operating part 17 is then lifted to open the top of a through- hole 15 and return the interior of the container 2 to ordinary pressure. Thereby, the objective extraction is carried out. |
