Ultra-fine high speed grinder for e.g. coffee - grinds at high pressure between fixed and rotary grinding members

摘要

Coarse pieces of e.g. coffee or cocoa alone, or mixed with other material, of a size between 0.104 and 0.469 mm are fed into the space between an upper fixed grinding member and a rotary grinding member opposite it and inside a cylindrical housing, through a feed opening in the fixed member. The rotary member is raised and lowered by a drive spindle passing through the centre by spring force, to give a very fine powder.