Plaston Ag, Kunststoffwerke Hans Frei & Sohne

Peter Koeppel

Franz Gutmann

Roland Frei

Peter Sieber

A filter for liquids and particularly coffee comprises a container having a planar horizontal base formed with at least one filtrate drainage opening, and on its inner face formed with a plurality of radial ribs and a central support member which together support a generally planar filter element of thin sheet material in spaced parallel relationship to the base. In use the arrangement produces a toroidal circulation of liquid which prevents compaction of the filter cake and reduces clogging of the filter element.

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Widnau, Switzerland

Peter Koeppel