DE7705357U1 - DEVICE FOR THE CONTROLLED FILTRATION OF COFFEE - Google Patents

Description

_{it t} , »a ·» «*» β »βββ

Hans C. Schmidt, 2feOO Bremen? _r Contrescarpe 63

February 5, 1977

Device for the controlled filtering of

coffee

The invention relates to a device for controlled Filtering coffee, tea and other items to be filtered, consisting of a filter vessel with a permeable wall, an external drain for draining the filtered extract solution into a collecting vessel and an external drain that optionally blocks the drain Furnishings.

A known filter device consists of an approximately cylindrical Vessel and an intermediate wall made of sieve material which divides the volume of the vessel into two areas, onto which a filter paper is placed, a drain attached below the partition and a valve-like device, to optionally open or close the process for the purpose of regulating the extraction time. The partition is with some known devices evenly, in others cylindrical and coaxial with the cylindrical vessel. The locking mechanism consists of two mutually rotatable parts with eccentric holes or one rotatable or slidable one Chicken in the drainage channel.

What all these devices have in common is that the filter material is distributed on the filter when the brewing water is poured on becomes uneven, in that the filter material is compressed in some places, is washed away on others. As a result, the extraction time for the parts of the filter material is despite one exposure time regulated by the process control different, which has a negative effect on the utilization of the filter material and the quality of the extract.

7705357 6/16/77

It Il '

ι I ι I ·
II
l: tt

Further disadvantages of the known filter devices relate to the complexity of construction and the resulting high production costs, the awkwardness in dealing with \ the same, and especially the difficulty of cleaning.

The invention is based on the object of a new and improved To create a filter device for coffee, tea and other filter material, which has the advantages of a simple, easy The construction that can be dismantled and cleaned is combined with that of an effective distribution of the filter material.

This object is achieved in a device for the controlled filtering of coffee and the like of the type specified above according to the invention achieved in that the device consists of three nested conical funnels, of those in the middle for receiving the filter material and possibly a paper filter with several funnels, preferably slot-shaped openings is provided in the cone wall, the inner funnel by means of a flange, which over the Edges of the middle and outer funnel overlaps, leaves a distance from the middle funnel and a lower one has opening for filling water in the central funnel. The middle funnel has an outwardly protruding one Nose, and the outer funnel a suitable recess for receiving this nose, which are dimensioned such that at in the recess of the inserted nose the lower area of the middle funnel the lower outlet opening of the outer one Funnel and at the same time the conical surface of the outer funnel closes the openings in the central funnel.

This ensures that when pouring boiling Water through the opening of the inner funnel as a result of the water coming in concentrated in the middle at the bottom and at the Funnel wall of the middle funnel creates a vortex, which washes up the coffee grounds vigorously and washes around every grinding particle and this almost evenly from below onto the wall of the bag

7705357 6/16/77

j: ϊϊ Ji ie ■ · **** «»

deposited. Because all openings of the outer and middle funnel can remain closed in this position the exact amount of water poured into the central funnel and, if necessary, measured precisely, including dimensions on the inner and middle funnel can be provided. This state can be maintained as long as the duration of the drawing is desired in order to achieve optimal use of the coffee grounds.

After the brewing time has elapsed, the middle funnel is turned in the indicated direction, the nose of the middle funnel rises out of the recess to become the bottom of the middle funnel and the side walls of the outer funnel separated from each other so far that the drainage of the coffee stock is ensured through the bag and the side slits. the three funnels can be easily separated from each other and cleaned after the end of the filtering process.

Further developments and refinements of the invention are characterized in the protection claims and in conjunction below with the figures representing an embodiment. Corresponding parts are shown in the figures provided with the same reference numerals.

It shows;

1 shows a filter device in vertical section with the closed Procedure,

2 shows the same filter device in section when it is open Outlet and

3 shows a filter device in a perspective view, disassembled into its parts.

7705357 6/16/77

The filter device shown in section in FIG from an outer funnel 1, a middle funnel 2 and an inner funnel 3 with a circular ring-shaped, a kind Flange forming the cover. The funnel 1 is provided with a flange 4 for placing on a vessel for receiving the filter fluid is determined. An outlet nozzle directs the liquid into this vessel. The middle funnel 2 has a closed bottom 6, however, has on his Conical shell has a plurality of openings 7 and 9, which can be circular or slot-shaped. One movement 11 on the upper edge enables the funnel to be lifted off the funnel 1. On the upper edge of the middle funnel 2 there is a cross over the outer funnel Part 12 comprising the nose connected to the hopper 2. In the position shown here, this nose engages in a recess 14 at the edge of the outer funnel, which is covered here, but can be clearly seen in Figure 3. In addition, a handle be provided opposite the recess 14 on the outer funnel 1.

The interior of the funnel 1 is essentially covered by the cover-like flange 15 of the inner funnel 3. This flange 15 is provided with a grip edge 16. The free opening of the funnel through which the brewing water is poured can be covered with a further cover, not shown. A paper filter 19 is inserted into the central funnel.

When the brewing time for the coffee powder poured onto the filter paper 19 has expired, the middle funnel becomes slightly twisted with the handle 11, the nose 12 being lifted out of the recess by the tangentially acting force and is placed on the upper edge of the funnel 1. The middle cylinder moves out of the axis of symmetry of the outer funnel, as shown in Figure 2. To-

7705357 1B.06.77

1 ι> I till

■ "5 '" ·

the openings 7, 9 in the wall of the middle funnel and the one that penetrates the filter paper are immediately opened Coffee extract can drain into the outer funnel 1.

In Figure 3, the filter device according to the invention is disassembled Representation reproduced in perspective. One recognises on the upper edge of the outer funnel 1, the recess 14 provided for receiving the nose 13, on the middle funnel the nose 13 that fits into the recess, which is here from the overlapping part 12 is covered. A cover 20 is placed on top of the inner funnel 3.

The shapes of incision 14 and nose 13 can be modified be that intermediate positions of the central funnel are adjustable. This can reduce the flow time of the filtrate can be varied by the filter. To avoid heat loss, the outer funnel and the lid can be double-walled be trained.

7705357 6/16/77

Claims (9)

»A«! •• * -t ι ι · · ι S chut ζ sun sayings 1. Device for controlled filtering of coffee, tea and other filter material, consisting of a filter vessel with a permeable wall, a drain for discharge the filtered extract solution in a collecting vessel and a device that optionally blocks the drain, characterized in that the Device consists of three conical funnels (1,2,3) placed one inside the other, of which the middle one is for receiving the filter material and possibly a paper filter certain funnels (2) with several, preferably slot-shaped openings (7,9) is provided, the imvare funnel . (3) by means of a flange (15) which extends over the edges of the central and outer funnel, a distance from the central funnel (2) and a lower opening for filling water into the central funnel (2) and that the central funnel (2) has an outwardly projecting nose (13), and the outer funnel (1) has a recess (14) suitable for receiving this nose and dimensioned in such a way that that when the nose is inserted into the recess, the lower area of the central funnel is the lower outlet opening of the outer funnel and at the same time the conical surface of the outer funnel the openings in the middle funnel locks. 2. Apparatus according to claim 1, characterized in that the middle funnel (2) at least two evenly along of the circumferential projecting lugs (13) and the outer funnel for the simultaneous reception of these Has noses suitable recesses (14). 3. Apparatus according to claim 1, characterized in that the middle funnel (2) one over the edge of the outer Has funnel (1) cross part (12). 7705357 6/16/77 I C '> »Ρ a ι * -7 - '"■■ ^!: 4. Device n <? _t ch claims 1 to 3 / characterized, öa, ß the outer funnel (1) and an inner one .; Funnel (3) closing dachshund (20) double-walled I are performed (Fig. 3). i 5. Device according to claims 1 to 4, characterized marked I is characterized in that the central hopper (2) an upwardly and I advance on the outside over the other two funnels (1,3): g £ " _n a _e n \ Handle (11) carries. I. 6. Device according to claims 1 to 5, characterized in that I draws that the handle (11) in the immediate vicinity of the I attached the protruding nose (13) to the central funnel I and is preferably connected to this in the material. i 7. Device according to one of the preceding claims, characterized l characterized in that the funnel (1,2,3) from preferably I consist of transparent plastic. I. 8. Device according to one of the preceding claims, characterized I marked that on the flanks of the recess (14) ; Steps are provided so that intermediate positions of the nose (13) I are adjustable. ■ '■ 9. Device according to one of the preceding claims, characterized i marked that the outer funnel (1) at the top a substantially vertical, preferably cylindrical guide surface and the middle funnel (2) corresponding Has mating guide surfaces, so that when the central funnel (2) is raised one of these concentric to the outer one I funnel (1) leading device is formed. 7705357 6/16/77