Braun Aktiengesellschaft

Braun Gmbh

Dieter Friedrich

Christof Kleemann

Uwe Bielfeldt

Bernd Trebitz

Christian Ziesch

Horst Emmerich

Frank Roland Gliemroth

Gunther Seidel

Michael Machlitt

Rolf Eimecke

Christof Miltenberger

Reinhard St&uuml;cher

Robert Wirsing

Reinhard Stucher

Dieter Koch

The invention is directed to a filtering device, a filter element therefor and a method of manufacturing the filter element (,) from filter paper. The filter element (,) has a receiving cavity (,) to be filled with extractable materials such as coffee grounds or tea leaves. Following contact with hot water, the extractable materials deliver extractive substances to the water, resulting in a brewed beverage that is drained from the filter element (,). During this process, the filter element (,) is held by the filter support (,) by way of a supporting member which includes a rim (,) formed on the filter element (,) and having a bearing surface (,), and a supporting surface (,) formed on the filter support (,). The rim (,) of the filter element (,) is reinforced mechanically by providing the filter paper with exposed pleats (,) which cooperate with corresponding elevations (,) and recesses (,) formed on the supporting surface (,) of the filter support (,). Such a filtering device of the present invention enables its manipulation and manufacture to be significantly facilitated. At the same time, improved brewing results are obtained. The operations of inserting such a filter element (,) in a filter housing (,) and filling it with coffee grounds, for example, are also improved. It is possible to manufacture a plurality of filter elements (,) in a single operation. At the same time, the filter elements are stackable in a minimum of space. The filter element is held in the filtering device without any additional fastening.

Filtering device, filter element and method of manufacturing the filter element used for the preparation of brewed beverages

Filter paper

A filter for the filtration of extraction beverages includes a disk having a plurality of apertures through which the beverage extracted from the material to be extracted passes form the afflux side to the efflux side. Each aperture is formed by cut edges in the disk and by bending a cut edge away from the surface of the disk to form a roof-shaped dome. The filter is formed by a single punching, bending and embossing operation without scrap slug being produced.

Filtering means for the filtration of extraction beverages, in

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Eppstein, Germany

Dieter Friedrich