DE8004003U1 - DEVICE FOR SEPARATING SOLID PARTICLES AND LIQUID - Google Patents

Description

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The invention relates to a device for separating solid particles and liquid, in particular for brewing beverages, such as ^■: tea, coffee and the like, comprising a funnel-shaped from an approximately, widening to be as fill port serving mouth open towards the housing, the orifice-remote at its Has at least one passage opening for the filtrate at the end, and one that can be inserted into the housing. its shape adapted .. filter insert, where the:; The filter insert is formed from a dimensionally stable plastic body, which is only open on the mouth side, but closed on the bottom side, and the wall of which preferably has large window-like recesses that are metallized! Filter films are covered with in particular galvanically generated slots as a passage for the filtrate.

Such a device is known from an earlier utility model owned by the applicant. So far _; was a filter foil used for these?

had a uniform slit or perforation over its entire surface. The disadvantage this device is that either with a large slot or. Hole size also solids, for example Coffee grains that can be run through or that if the hole width is too small Filtering process takes too long. The filter film can even become completely clogged. This is particularly disadvantageous in the case of filter devices for electrical devices, e.g. coffee machines, because the filter is then flooded by the automatically running, boiling water and this passes by on the outside.

The invention has set itself the task of providing a device of the type indicated at the outset, in which a spatially and not only flatly extending filter film is used, too create, which on the one hand with the greatest security prevents fine-grained grist from the filter cake gets into the filtrate and still a largely rapid and even rate Filtering allows, largely independent of the bed height of the filled Grist or the like.

According to the invention, this object is in principle solved in that the slot width BEZW for elongated slots. the slot diameter at about round slots seen from the mouth of the plastic body in the direction of the bottom is less. The uneven formation of the slots and / or holes ensures that that the filter material or the like, which is inevitably so according to grain size when filling classified that the fine grain fraction near the bottom is greater than near the mouth, as far as possible Remains in the filter during the filtering process and does not get into the filtrate. This effect is regardless of the amount of substance 'that is put into the filter. In addition, a longer residence time of the filled water or the like in the lower part of the filter, without clogging the entire filter and thus overflowing the automatic Filling with water or the like can occur. Rather, it is in the upper filter area a rapid throughput achieved despite sufficient enrichment.

If this solution is considered in relation to a conventional coffee filter, it should be noted that

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regardless of the amount of ground coffee (e.g. for two cups or for 12 cups) a good, undisturbed filtering of high throughput speed and good productivity is achieved.

It has proven to be advantageous if it is ensured in this device that the slot width BEZW. whose diameter measures at most about 200 i "? and at least about Soyun . The maximum or minimum dimensions do not have to be reached, so that, for example, filters with the extrema 1 BO / O-nx up to 80 ^". can be used well, while exceeding the maxima has the disadvantage that either there is no more measurable throughput (below 60 _.

It is also advantageous if the slot width BEZW. the diameter steadily from the mouth decreases towards the bottom, with the slot length also decreasing to a maximum of 60 <: ■ <»> ι. This arrangement corresponds essentially to the statistical distribution and arrangement of the one filled in from above Filter flour or the like and is

therefore preferred.

If necessary, it can be advantageous if the slot width or its diameter is zone-wise decreases. That is, there are several equally sized rows of slots and / or holes arranged in zones, only these zones decreasing in relation to others Have slot width.

It can also be provided that the filter film is arranged in the manner of a hollow cylinder

It is more advantageous if the filter film according to Artjj

a cone standing on the tip respectively. a pyramid is arranged.

An exemplary embodiment is shown in drawing i and is described in more detail below. ■ It shows:

1 shows a view of a filter insert;

Fig. 2 shows a detail on a considerably larger scale.

The filter insert consists of a mouth-side (top) open, dimensionally stable and heat-

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Resistant plastic body 1, which has a flat: closed bottom 1 ^a and window-like recesses 1, in which filter films are tightly held.

In Fig. 1, some zones of the filter film 2 are circled. These are shown enlarged in FIG. It can be seen that the slots (v) are wider in the area close to the curve. For example 200. '' ·, where the slots are changed zone by zone, so that at: 160 ^f i / »are reached, at y 120,""'and at 6θ.π.> i. A steady decrease in the slots is also possible, with the slot length also decreasing according to vxyz.

The filter insert 1 is oval in plan view and has at least two or more filter foils 2, the body 1 only being used for stabilization and handling.

Claims (6)

8ooo Munich Registration for Richard Steding Buschweg 9 588 Lüdenscheid "Device for separating solid particles and liquids" Protection claims: 1. Device for separating solid particles and liquid, in particular for brewing Beverages, such as tea, coffee and the like, consisting of an approximately funnel-shaped, to themselves widening, serving as a filling opening towards the open housing that is remote from the mouth End has at least one passage opening for the filtrate, and one insertable into the housing, adapted to its shape. Filter insert, whereby the filter insert consists of a dimensionally stable Plastic body is formed, the only The mouth side is open, but the bottom side is closed, and the wall preferably has large window-like recesses which are covered by metallic filter foils with in particular galvanically generated slots as a passage for the filtrate, characterized in that the slot width BEZW for elongated slots. the slot diameter is smaller in the case of approximately round slots from the mouth of the plastic body (1) in the direction of its bottom (1 ^a ). 2. Apparatus according to claim 1, characterized in that the slot width BEZW. whose diameter measures at most about 200: '<<> and at least about 60 / & ⁷ ^. 3. Apparatus according to claim 1 and / or 2, characterized in that the slot width BEZW. whose diameter is constant from the mouth to the in addition, the bottom (1) decreases, A being the length of the slot decreases 60mm at most. 4. Device according to one of claims 1 to 3 »characterized in that the slot width respectively whose diameter decreases in zones. 5. Device according to one of claims 1 to 4, characterized in that the filter film (2) is arranged in the manner of a hollow cylinder. 6. Device according to one of claims 1 to 4, characterized in that the filter film (2) in the manner of a cone standing on the tip respectively. is arranged in a pyramid. No. 4.1.4. 91/80 (§ 46 PaUnwO)