| 摘要 |
<p>The machine includes a motor-driven conveyor screw (66) provided in a supply duct (62) connecting the coffee grinder (52) to a percolation chamber (78) to move the ground coffee at a rate higher than that of its supply from the coffee grinder. Preferably the percolation chamber (78) has an associate prechamber (64) into which the supply duct (62) opens. Means for closing the percolation chamber (78) and compressing the charge (C) of coffee comprise a tamper (92) which is reciprocable between a withdrawn position in which it does not occupy the prechamber and closes its side opposite the percolation chamber and an advanced position of compressing the charge in the chamber and sealing the chamber. The percolation chamber (78) is a through-chamber with open ends, one being a continuation of the through-chamber and the other, as part of the means for closing the chamber, being associated with a counter-tamper obturator (94) movable towards and away from an advanced position in which it closes the other end both to allow the compression of the charge of ground coffee in the chamber by means of the tamper (92) and to seal the chamber. The tamper (92) is movable to an even further advanced position beyond the said other end of the chamber to expel the compressed coffee.</p> |
