Filter

Abstract

A filter comprises first and second adjacent filter material layers. The first filter material layer is joined to the second material layer along only a partial circumferential section of the second filter material layer to form an essentially disk shaped receptacle for holding coffee or tea. The second filter material layer includes a pocket. A section of the first filter material layer not joined to the second filter material layer presents a foldable tongue that is insertable into the pocket.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features and advantages of the invention will be further understood from the following detailed description, considered in conjunction with the accompanying drawings.

FIG. 1 is a top view of a filter according to the invention.

FIG. 2 is a side sectional view of the filter according to FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to the drawings, a filter 1 comprises a disk-shaped filter material layer 2, which is arranged adjacent to a disk-shaped second filter material layer 5.

The filter material layers 2 and 5 are joined along the circumference with an embossed seam 4. This embossed seam 4 does not extend along the complete circumference, but only along a partial section thereof, up to the ends 6 of the embossed seam. The ends 6 of the embossed seam are arranged such that approximately 10% to 40%, preferably 20% to 30%, of the complete circumference is not provided with an embossed seam. In other words, the embossed seam 4 covers slightly more than half the circumference of the disk-shaped filter material layers 2 and 5.

A disk-shaped receptacle 3 is formed between the filter material layers 2 and 5, which can be filled with tea or ground coffee. For this, the filter material layer 2 is provided with a foldable tongue 8 that can be folded up in the region where the filter material layers 2 and 5 are not joined, so that a filling opening is formed between the filter material layers 2 and 5. Once the ground coffee or tea is filled in, the filter 1 can be closed by inserting the foldable tongue into a pocket 11.

The pocket 11 is formed by connecting a filter material section 10 along the circumferential edges with an embossed seam 12 to the filter material layer 5, approximately up to the ends 6. An opening edge 13 of the pocket 11 consequently extends adjacent to a folding edge 7 of the tongue 8 when the tongue is folded upward in the opened state.

Once the ground coffee or tea is filled in, the filter 1 can be closed again by inserting the tongue 8 into the pocket 11, wherein an edge 9 of the tongue 8 rests against the inside of the pocket 11.

As seen from above, the filter 1 is embodied disk shaped since the edge of the tongue 8 conforms to the edge of the lower filter material layer 5.

For the illustrated embodiment, the filter 1 with the filter material layers 2 and 5 consists of paper.

However, different fluid-permeable materials such as a non-woven or a multi-layer filtering material can also be used. The paper layers, however, can be joined easily with embossed seams along the edges.

For the illustrated embodiment, the dimensions for the tongue 8 are approximately the same as for the pocket 11, thus making it easy to secure the tongue 8. Of course, it is also possible to embody the pocket 11 slightly larger than the tongue 8 to permit a more loose insertion.

It will be understood that the above description of the present invention is susceptible to various modifications, changes and apaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims.

Claims

1. A filter, comprising: first and second adjacent filter material layers, the first filter material layer being joined to the second material layer along only a partial circumferential section of the second filter material layer to form an essentially disk shaped receptacle for holding coffee or tea, wherein the second filter material layer includes a pocket, and a section of the first filter material layer not joined to the second filter material layer presents a foldable tongue that is insertable into the pocket.

2. The filter according to claim 1, wherein the pocket has dimensions that are approximately the same as those for the foldable tongue.

3. The filter according to claim 1, further including a filter material section connected to the second filter material layer along the circumference of the second filter material layer to form the pocket.

4. The filter according to claim 1, wherein the tongue has a folding edge arranged adjacent to an opening edge of the pocket.

5. The filter according to claim 1. wherein the first and second filter material layers are comprised of paper and are joined with an embossed seam.