EP0660683A1 - Agencement et dispositif de filtration utile pour preparer des boissons a base de cafe et/ou de the - Google Patents

Agencement et dispositif de filtration utile pour preparer des boissons a base de cafe et/ou de the

Info

Publication number
EP0660683A1
EP0660683A1 EP93919216A EP93919216A EP0660683A1 EP 0660683 A1 EP0660683 A1 EP 0660683A1 EP 93919216 A EP93919216 A EP 93919216A EP 93919216 A EP93919216 A EP 93919216A EP 0660683 A1 EP0660683 A1 EP 0660683A1
Authority
EP
European Patent Office
Prior art keywords
filter
capsule
openings
filter device
inflow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93919216A
Other languages
German (de)
English (en)
Inventor
Otto Dr. Stemme
Rosalind Stemme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STEMME Otto
Original Assignee
STEMME Otto
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19934302899 external-priority patent/DE4302899A1/de
Priority claimed from DE19934304691 external-priority patent/DE4304691A1/de
Priority claimed from DE19934317902 external-priority patent/DE4317902A1/de
Application filed by STEMME Otto filed Critical STEMME Otto
Publication of EP0660683A1 publication Critical patent/EP0660683A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/18—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container
    • A47J31/20—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container having immersible, e.g. rotatable, filters

Definitions

  • the present invention relates to a filter device for preparing coffee and / or tea beverages, which has a space for receiving filter material and is immersed in operation in a liquid in a container which circulates through the filter device. Furthermore, the invention relates to a device equipped with the filter device for preparing coffee and / or tea beverages.
  • a coffee machine in which a filter device with a disk-like filter capsule which holds the coffee powder is immersed in a container filled with liquid up to close to the container bottom provided with a heating device.
  • the filter capsule has filter openings on its lower and upper filter surfaces.
  • the filter material is to be extracted by the self-forming convection of the water heated above the radiator from bottom to top through the filter capsule be, so that the initially clear water in the container is gradually enriched with the extraction substances from the filter material.
  • this extraction process based on the convection of the water is not sufficient to obtain a coffee brew of the desired concentration in a sufficiently short time. This means that there is practically no possibility to adjust the strength and taste of the coffee stock by varying the extraction time in the desired way.
  • a coffee machine in which a cylindrical filter body containing the coffee powder is placed on the inside and bottom of a liquid-filled container with filter bases on the bottom and top. While the filter body is also at rest during operation, radially directed nozzles rotate in a chamber above the head-side filter screen and push the liquid vertically through the filter device.
  • the nozzles are driven by an electric motor, the housing of which is connected to the filter device via a hollow axis in which a drive shaft for the nozzles rotates.
  • this device Because of the axial flow through the filter material to obtain an extraction result that can be achieved in a reasonable time, this device requires either a large diameter of the filter body to reduce the flow resistance caused by the filter material or a very high liquid pressure, which requires a high speed for the nozzles.
  • the construction of the device is relatively complicated and requires great effort to change the filter material and to clean it.
  • a coffee machine is known from US Pat. No. 4,401,014, in which a cylindrical filter body which is also stationary during operation and which has filter openings on the lateral surface is also used.
  • a motor-driven propeller rotates in the filter material, which causes the coffee powder in the filter body to be continuously swirled without a stable flow exchange with the liquid surrounding the filter body. This leads to relatively long extraction times and disturbing sentence formation in the finished brew.
  • the structure of this device is also relatively complicated and requires great effort to change the filter material and to clean it.
  • the coffee powder is in a centrifugal filter.
  • the coffee powder is first distributed and compressed as evenly as possible on the filter wall at high filter speeds of, for example, 4000 to 8000 revolutions per minute, whereupon from a water storage container hot water is introduced into the interior of the filter, which penetrates the coffee powder and is thrown as a brew against a surrounding collecting wall, from which the brew drains into a separate collecting vessel.
  • the invention has for its object to provide a filter device for preparing coffee and / or tea drinks of the type mentioned, which manages with a simple and compact design with short extraction times.
  • the invention has for its object to provide a device equipped with this filter device for preparing coffee and / or tea beverages.
  • the filter material initially distributed approximately uniformly in the filter capsule of the filter device collects on the inner wall of the filter capsule due to the centrifugal force and the radial flow directed to the filter openings of the lateral surface and quickly assumes a hollow cylindrical shape, the filter material volume being comparatively small in thickness and forms a large flow area.
  • the filter material through which the fluid flows axially the filter material through which the liquid flows radially forms a low flow resistance in the filter device according to the invention, whereby even at low speeds of the filter device, a strong circulation or a high volume flow (volume per unit of time) of liquid through the filter material and thus a high degree of extraction is achieved within a short extraction time.
  • the filter device according to the invention can also be manufactured compactly and with low weight, including the liquid container, which furthermore has the advantage of inexpensive production.
  • the filter device according to the invention can be designed as a "coffee stick" in conjunction with any liquid container available to the user, eg. B. coffee cups, coffee pots, thermos, etc. can be used.
  • the filter device according to the invention is easy to handle and clean.
  • the beverage prepared with the filter device according to the invention is highly aromatic.
  • the coffee drink prepared with it also has a relatively high pH, which is why it is well tolerated by sensitive consumers.
  • Fig. 1 shows a first embodiment of the invention
  • FIG. 1A the filter device of the device according to FIG. 1 with filter cover in a perspective, exploded and partially cut-open representation
  • FIG. 1B shows a second embodiment of the filter device of the device according to FIG. 1 with a filter cover in a perspective, exploded and partially cut-open representation
  • FIG. 1 shows the device according to FIG. 1 with a third embodiment of the filter device
  • FIG. IC the filter device according to FIG. IC in a perspective, exploded and partially cut-open representation
  • FIG. 1E shows an embodiment of a device in which the filter device according to the invention is used
  • FIG. 1F shows an embodiment of the filter device according to the invention
  • IH shows a further embodiment of the filter device according to the invention
  • 1J shows an embodiment of the u. a. II usable filter device
  • FIG. 1K shows a further embodiment of the filter device according to the invention
  • FIG. 2 shows a further embodiment of the filter device and device according to the invention
  • FIG. 2A shows a further embodiment of the filter device and device according to the invention.
  • FIG. 2B shows a further embodiment of the filter device and device according to the invention
  • FIG. 2C shows a further embodiment of the filter device and device according to the invention
  • Fig. 3 shows a further embodiment of the filter device and device according to the invention.
  • Fig. 4 shows a further embodiment of the filter device and device according to the invention.
  • the filter device comprises in particular the following elements: a filter shaft 1-15, 2-15, 2-15 ', 3-63, 4-63 and / or connected or connectable to a drive device a clutch device for transmitting the rotary movement of a filter or drive shaft, a filter cover 1-17, 2-17, 3-71, 4-71, a filter body 1-19, 2-19, 3-19, 4-19, one Filter bottom 1-27, 2-27, 3-27, 4-27, at least one inflow zone 1-29, 1-29 ', 2-29, 2-29', 3-35, 4-35 and a filter area 1- 23, 2-23, 3-23, 4-23 with filter openings 1-25, 2-25, 3-25, 4-25.
  • a device in connection with the filter device, it comprises in particular a liquid container 1-1, 2-1, 3-1, 4-1 for receiving liquid 1-21, 2-21, 3-21, 4-21 which is transformed into Sud 1-22, 2-22, 3-22, 4-22 when the filter device immersed in the liquid is operated.
  • a liquid container 1-1 designed as a kettle with a preferably plate-shaped electrical heating device 1-3, a handle 1-5, a caster 1-7 and a container lid 1-9.
  • the filter device projects into this liquid container 1-1 from above. It has an electric motor 1-11, which forms a drive unit and is connected via connecting elements 1-011 to the container lid 1-9, with a drive shaft 1-13, and a filter shaft 1-15, which is fixedly or detachably connected to the drive shaft 1-13 of the drive unit and is guided through the container lid 1-9.
  • a filter cover 1-17 is attached to the filter shaft 1-15 by means of a screw connection or another connecting device.
  • the filter cover 1-17 has a closed cover surface, apart from degassing openings 1-34 explained in more detail below.
  • the filter shaft 1-15 can also be reduced to a short connection element, as shown in FIG.
  • connection element contained in the filter cover 1-17 in which the drive shaft 1-13 of the drive unit engages firmly or releasably.
  • the connection between drive shaft 1-13 and filter shaft 1-15 is, as shown in FIG. 1, preferably outside the container 1-1 for protection against liquid splashes and water vapor. This area can also be ventilated like a fan. Additional protection against liquid splashes and water vapor is achieved by a preferably disc-shaped attachment 1-015, which is attached to the filter shaft 1-15 and is arranged in the vicinity of the container lid 1-9.
  • the filter device comprises a drum-shaped filter body 1-19 which is detachably connected to the filter cover 1-17 and is preferably designed as a cylindrical hollow body.
  • a screw thread 1-18 or a bayonet (not shown) on the filter body 1-19 and a corresponding thread 1-36 or bayonet (not shown) on the filter cover 1-17 are preferably used to connect the filter cover and filter body.
  • 1A further shows that the peripheral filter surface 1-23 formed by the outer surface of the hollow cylindrical filter body 1-19 has small filter openings 1-25, which is close in height over the area of the filter surface 1-23 from the lower edge to an upper edge the screw thread 1-18 or B jonet closure of the filter body are largely evenly distributed.
  • the filter body 1-19 has a filter bottom 1-27 forming an end face with a central, preferably approximately circular inflow zone 1-29.
  • the annular area of the filter base surrounding the inflow zone is closed up to its edge, apart from a few additional openings 1-28, which are explained in more detail below.
  • an inflow tube 1-3 is inserted fixedly or releasably by means of a screw connection and is arranged largely coaxially in the filter body 1-19. It has a lower inlet pipe opening 1-35 and along the pipe wall small filter openings 1-33, which are arranged in their arrangement from below approximately up to the height of the upper edge of the area of the filter surface 1-23 provided with filter openings 1-25 of the filter body 1-19 pass.
  • the entirety of the filter openings 1-25 of the filter body 1-19 and the entirety of the filter openings 1-33 of the inflow pipe 1-31 are thus opposite.
  • the inflow pipe 1-31 In its upper area, the inflow pipe 1-31 is closed by an inflow pipe cover 1-37, which is bevelled in the manner of a dome.
  • the annular space formed between the inflow pipe 1-31 and the filter surface 1-23 of the filter body 1-19 serves to receive the filter material 1-39 to be extracted, for example roasted coffee ground into powder.
  • the filter body 1-19 with the filter bottom 1-27 with its inflow zone 1-29 and possibly with the inflow pipe 1-31 together with the filter cover 1-17 form a filter capsule 1-100.
  • analog units are also referred to as filter capsules.
  • the filter capsule 1-100 formed after attaching the filter body 1-19 to the filter cover 1-17, filled with filter material, is immersed in the liquid container 1-1 completely or at least partially after it has been placed on the container cover 1-9 Water 1-21 or in the Sud 1-22.
  • the inflow zone 1-29 in the area of the filter base 1-27, the inflow of water 1-21 or broth 1-22 into the inflow tube 1-31 is advantageously, and thus the formation of a circulating, the rotation of the filter capsule Filter material 1-39 predominantly radially penetrating circulation flow corresponding to the flow lines 1-44 and 1-45 shown schematically in Fig. 1 ensured, even if the filter capsule 1-100 is not completely immersed in the water 1-21 or in the broth 1-22 .
  • the inflow zone 1-29 and the inflow pipe 1-31 can instead of the filter base 1-27 be attached in a corresponding manner to the filter cover 1-17 (not shown), but this means that the filter capsule 1-100 including the filter cover 1-17 is completely immersed in the water 1-21 or in the brew 1-22.
  • the circulation of the water then runs in the vertical direction opposite to the illustration in FIG. 1, while the horizontal direction of flow through the filter material 1-39 remains unchanged.
  • the mode of operation of the embodiment according to FIGS. 1 and 1A is as follows.
  • water 1-21 is first filled into the container 1-1.
  • coffee powder or tea leaves are filled as filter material 1-39 into the filter body 1-19 previously detached from the filter cover 1-17, which is facilitated by the outer bevel of the inflow tube cover 1-37.
  • the filter body 1-19 is attached to the filter cover 1-17, whereby the filter material 1-39 in the cross-sectionally annular receiving space that is perpendicular to the axis of rotation 1-41 of the filter surface 1-23 and the jacket part of the inflow pipe 1-31 and is determined in the direction of the axis of rotation 1-41 by two end faces formed by the filter base 1-27 and the filter cover 1-17, is encapsulated like a capsule on all sides.
  • the container lid 1-9 is placed on the liquid container 1-1 so that the filter capsule 1-100 is immersed in the water 1-21 in the container 1-1 and the inside of the filter capsule 1-100 also fills with water the filter openings 1-25 or 1-33 penetrate into the interior of the filter body 1-19.
  • the filter material 1-39 located in the filter capsule 1-100 is then also in water.
  • the heating device 1-3 is switched on and preferably simultaneously the motor 1-11 is energized, so that the filter capsule 1-100 rotates in the heating phase of the water 1-21 in the water about the vertical axis 1-41.
  • a strong one which is schematically illustrated in FIG. 1 by the flow lines 1-44 and 1-45, rapidly forms and circulates the water 1-21
  • Circulation flow which flows through the filter material 1-39 from the inside to the outside in a predominantly radial direction. Water flows from the bottom through the inflow zone 1-29 into the inflow pipe 1-31 and rises there. Since the inflow pipe 1-31 is closed at the top by the inflow pipe cover 1-37, the rising water flows through the filter openings 1-33 of the inflow pipe into the interior of those formed by the filter capsule 1-100 with filter base 1-27 and filter cover 1-17 Capsule 1-100.
  • the water which has penetrated from the inflow tube 1-31 into the interior of the capsule flows through the filter material 1-39 to the filter surface 1-23 of the filter body 1-19 and enters through the filter openings 1-25 Space between the outer walls of the filter capsule and the inner wall of the liquid container 1-1.
  • the rotating filter capsule thus acts as a circulation pump.
  • the filter material 1-39 in the filter body 1-19 is flowed through essentially radially and increasingly extracted, the water 1-21 subjected to the circulation quickly becoming a coffee or tea drink desired brew 1-22.
  • the rotating filter capsule ensures rapid mixing and rapid concentration equalization of the substances introduced into the water 1-21 or the broth 1-22.
  • the filter surface 1-23 with its filter openings 1-25 is formed by a seamless piece of pipe or a bushing or by a rounded band, the ends of which are joined together along a seam, 1B, the filter surface 1-23 of the filter body 1-19 is divided into a plurality of filter segments 1-20 which are separate from one another.
  • the filter body 1-19 has a carrier body 1-24 with belts which run around the lower and upper edge and between which perpendicular webs 1-26 extend. This creates window-like cutouts or openings, in each of which filter segments 1-20 are inserted.
  • the insertion of the filter segments 1-20 into these window-like cutouts of the carrier body 1-24 is expediently carried out by injection or extrusion molding around the edge, for which purpose the filter segments 1-20 are inserted as injection-molded inserts into the injection mold during injection molding of the carrier body 1-24 .
  • the carrier body 1-24 can form a one-piece molded plastic part with the filter base 1-27.
  • This construction has the advantage that the filter segments 1-20 can be manufactured and processed in the form of a flat band or a film or the like before being inserted into the carrier body 1-24 and can be provided with the filter openings in a still flat state. Only then are the individual cut and rounded Filterele duck according to the shape and size of the window-like openings of the filter support 1-24.
  • the rounding of the filter segments 1-20 can be omitted if the filter carrier 1-24 is formed instead of a circular cross-section with a polygonal cross-section, the webs 1-26 being arranged at the corners of the polygon and as a rib with an angular profile, the filter carrier 1-24 give great mechanical strength (not shown).
  • a cylindrical, rounded wire or film sieve with filter openings 1-25 can also advantageously be placed as an insert in the injection mold, which is then stabilized by the webs 1-26 and the filter body 1-19 divided into filter segments 1-20.
  • the inflow pipe 1-31 with its filter openings 1-33 is reduced to the inflow zone 1-29 'with inflow openings 1-33', in which case the inflow zone 1-29 'is, for example, in the level of the filter bottom is 1-27.
  • the inflow zone 1-29 'with its filter openings 1-33' can also be formed by a separately manufactured plate or film 1-31 'which is inserted into a correspondingly large central opening in the filter base 1-27 and which is produced in a similar manner as the filter segments 1-20 of the embodiment according to FIG. IB.
  • this third embodiment of the filter unit corresponds to the embodiment according to FIG. 1A or the embodiment according to FIG. IB.
  • the filter cover 1-17 contrary to the illustration in FIG. IC, forms a closed end face, apart from the degassing openings 1-34, in accordance with the configuration of the filter cover according to FIG. 1A or IB.
  • FIG. IC shows, it is also possible to provide a central inflow zone 1-29 "with openings 1-33" also in the filter cover 1-17, possibly in the form of a plate or film similar to the plate or film 1-31 ' in the filter bottom 1-27. Then, with the onset of the rotational movement of the filter capsule 1-100, a strong circulation flow through the water, which is schematically illustrated in FIG. IC by the flow lines 1-44 and 1-45 and the further flow lines 1-12 and 1-14, is formed Filter material 1-39 therethrough, the streamlines penetrating the bottom-side inflow openings 1-33 'and the cover-side inflow openings 1-33 "as well as any additional cutouts 1-6 in the upper region of the filter cover 1-17.
  • the filter material 1-39 initially evenly distributed in the filter body 1-19 condenses toward the inside of the filter surface 1-23 and forms a hollow cylinder, a flow zone 1-21 'of water 1-21 or brew 1-22 running in the filter body 1-19 along the turning axis 1-41 being formed, which quickly becomes free of filter material.
  • FIGS. IC and 1D prove particularly effective at a somewhat higher speed of the filter capsule.
  • additional filter openings 1-28 can be provided in the embodiments according to FIGS. 1A and 1B near the inflow zone 1-29, through which water 1-21 or broth 1- 22 flows into the filter material in this area.
  • Their dimensions preferably correspond to those of the filter openings 1-25 and 1-33.
  • 1A, 1B, IC and 1D can be modified in such a way that it no longer takes on the function of filtering the liquid flowing through the filter material itself, but preferably in the form of a cage or basket in the form of a strip Filter paper that is introduced into the interior of the filter body by the user of the device before the respective beverage preparation and the inside of the filter surface 1-23 is completely or partially lined in a ring.
  • the arrangement of the small filter openings 1-25 on the filter surface 1-23 can be omitted.
  • the filter surface in this case forms larger passage openings for the liquid penetrating the strip-shaped filter paper.
  • this solution also has the advantage of simpler production due to the strip shape and a far lower amount of material used to form the filter paper strips.
  • the filter strip can also be supplemented to a cylinder or pot shape which leaves the area of the inflow opening 1-29 or the inflow openings 1-29 'in the filter base 1-27 free or has its own inflow openings.
  • cup-shaped paper filters with a closed bottom it is expedient to provide a paper quality with greater liquid permeability for the filter paper lying on the bottom surface of the filter basket than for the filter paper lying against the outer surface of the filter basket. If a prefabricated pot-shaped paper filter with a base and jacket part is provided, then in this case too, a higher liquid permeability can be provided for the base part than for the jacket part.
  • Liquid permeability can be provided as for the jacket part.
  • This part can also have additional degassing openings - corresponding to the degassing openings 1-34 located in the filter cover 1-17 - as well as the bottom part of the coffee bag corresponding to the openings 1-33 '.
  • the lid part and / or bottom part of the coffee bag can be formed by solid, perforated parts, e.g. B. plastic, can be replaced, which can be connected by webs.
  • the coffee bags are advantageously packed or sealed in a film during storage until they are used as intended, preferably under vacuum or protective gas.
  • sieve material instead of filter paper, e.g. B. as a wire mesh or screen, both preferably made of food-grade metal such. B. stainless steel or plastic. In this case, an approximately round cross section is preferred for the webs 1-26.
  • the axis of rotation 1-41 of the filter body 1-19 lies preferably outside the central axis 1-43 of the container 1-1. Furthermore, it has been shown that any turbulence in the water 1-21 or broth 1-22 can be reliably suppressed by at least one arm 1-47, which is preferably on the lid 1-9 with a view to easy cleaning of the inner wall of the container 1-1 is attached and from there protrudes below into the interior of the container 1-1 surrounding the filter body 1-19.
  • the at least one boom can advantageously also be located in the area of the inner wall of the container 1-1.
  • the filter capsule 1-100 with the filter cover 1-17 can be provided with a connection device for releasable coaxial attachment of the filter capsule to a coupling device of the filter shaft 1-15 or the drive shaft 1-13 (not shown).
  • FIG. 1E shows a device for using the filter device according to the invention according to FIG. 1F, IG or IH.
  • This device has a liquid container 1-1 as a large container with, for example, an electric heating device 1-3 on the bottom and a tap 1-72.
  • a removable container lid 1-9 fixedly or detachably connected is an electric motor 1-11 forming a drive unit with a drive shaft 1-13, which forms an axis of rotation 1-41, which is arranged eccentrically to a central axis 1-43 of the container 1-1 .
  • the container preferably has an oval, rectangular or otherwise deviating from the circular shape in order to reduce disturbing turbulence in the liquid 1-21 or brew 1-22.
  • brackets or inserts 1-47 are used, which preferably have a perforation 1-47 'and can be fastened to the container lid 1-9.
  • a filter shaft 1-15 Detachably connected to the drive shaft 1-13 of the drive unit is a filter shaft 1-15, on which a filter device according to the invention with a cylindrical hollow body, drum-shaped filter body 1-19, a filter base 1-27 and a filter cover 1-17 described in more detail below Can be attached in order to transmit a rotational movement emanating from the drive unit to the filter capsule 1-100 comprising the aforementioned elements when this is inserted into the container filled with water or other liquid according to FIG. 1E.
  • the structure of the filter device according to FIG. 1E or according to FIG. IF, IG or IH of the accompanying drawings corresponds to the structure of the filter device according to FIG. 1, 1A, 1B or FIG. IC and 1D. Deviations from this result, however, primarily with regard to the connection between filter body 1-19 and filter cover 1-17 and with regard to the connection between filter shaft 1-15 and drive shaft 1-13, which will be discussed in more detail below.
  • the structure, use and function of the device according to FIG. 1E also correspond in principle to the structure, use and function of the device according to FIG. 1.
  • FIGS. IF, IG and IH are described in more detail below, in particular insofar as they differ from the embodiments according to FIGS. 1, 1A, 1B or IC and 1D or go beyond them.
  • the filter shaft 1-15 is formed in the upper section as a hollow shaft with which the filter shaft with the entire filter unit is plugged onto the drive shaft 1-13 or can be removed from it.
  • the drive shaft z. B. have a spring, in the legs of which the filter shaft engages with a kind of groove.
  • the drive shaft can also have a preferably collar-like stop 1-30.
  • the filter cover 1-17 is preferably firmly connected to the filter body 1-19 after the filter material 1-39 has been introduced, similar to the embodiment according to FIG. IF.
  • the section through the filter material 1-39 is highlighted by puncturing.
  • the filter body 1-19 forms a basket or cage for receiving strip-shaped filter paper 1-40, which lies against the inner surfaces of the filter body 1-19.
  • transverse webs 1-26 are also present to form the basket or cage shape.
  • the filter shaft 1-15 is also hollow in the embodiment according to FIG. IG and can be plugged onto the drive shaft 1-13, for which purpose the drive shaft in turn has a collar-like stop 1-13 ', which is shown in FIG IF is designated 1-30.
  • a radially protruding pin of the drive shaft and and an angular slot The filter shaft together form a bayonet lock 1-13 ", with which the filter unit can be secured to the drive shaft.
  • the locking can also take place, for example, by latching devices.
  • the filter cover 1-17 is preferably firmly connected to the filter body 1-19 after the filter material 1-39 has been introduced, similarly to the embodiments according to FIGS. IF and IG.
  • the filter shaft 1-15 is formed in one piece with the filter cover 1-17 and forms a pin which is inserted into an end recess of the drive shaft, not shown.
  • similar locking elements can be provided as in the embodiment according to FIG. IG.
  • IC, II, 2, 2A, 2B and 2C - filter cover 1-17 or filter shaft 1-15 and / or drive shaft 1-13 also counter-pole permanent magnets - e.g. B. made of a material such as ferrite or rare earth alloys (e.g. neodymium, samarium) or Alnico - by the adhesive force of the filter cover 1-17 or filter body 1-19 is coupled to the drive shaft or held axially, one of the permanent magnets can be replaced by a body made of soft magnetic material.
  • the permanent magnets can also have a soft magnetic flux return.
  • the torque is transmitted via slots and teeth or pins engaging therein, which are preferably provided on parts of a magnetic capsule connected to the drive shaft 1-13 or filter shaft 1-15.
  • the magnetic capsule can also function as the 1-015 approach 1 embodiment. The arrangement and mode of operation of such magnets are shown and explained in detail in FIG. 1K described below.
  • the drive shaft 1-13 and filter shaft 1-15 are located with opposite ends on both sides of the container cover 1-, which is now closed in this area. 9. Both ends carry multipolar magnetized magnets and form a magnetic face or central rotary coupling (not shown). The information in the previous paragraph applies analogously to particularly suitable materials.
  • the embodiments described above are also suitable for the preparation of coffee and tea beverages in larger quantities, for example in hotel and restaurant businesses and larger offices, in a particularly simple manner and with little expenditure of time, without the need for specially trained personnel.
  • the device according to FIG. 1E can also be operated with a filter device according to FIGS. 1A to 1D.
  • the filter unit according to FIG. IF can be used with devices according to FIG. 1 or according to FIGS. 2 to 4.
  • IG and IH filter units with devices according to FIG. 1 can also be used.
  • the basic structure of the embodiment according to FIG. II is that of the embodiment according to FIG. IC Similar and comprises a liquid container 1-1 designed as a kettle with a handle 1-5, a caster 1-7 and, for example, a plate-shaped electrical heating device 1-3 'or a bowl-shaped electrical heating device 1-3 ", which is in a base or housing 1
  • the liquid container 1-1 is fixed or detachably placed or inserted on the base or the housing 1-87
  • the base or the housing 1-87 can also be used for other electrical components such as power supply units, circuits, switches and / or take plug.
  • the heater may II of FIG. Also in the manner of an immersion heater 1-3, "formed and a z. B. designed as a clamping device connector with the container 1-89 1-1 or by means of a transition piece with a 1-91 removable container lid 1-9 can be fixed or detachably connected, or high-frequency or microwave heating can also be provided.
  • An electric motor 1-11 forming a drive unit with a drive shaft 1-13 is fixedly or detachably connected to the removable container lid 1-9.
  • the electric motor 1-11 and the heating device 1-3 'or 1-3 "or 1-3"' are equipped with electrical connection cables, which are not shown in Fig. II.
  • a filter capsule is preferably detachably attached to the drive shaft 1-13.
  • the filter unit according to FIGS. II and 1J comprises a filter cover 1-17, which is connected to a filter shaft 1-15, which is attached to the drive shaft 1-13 or can be detachably attached.
  • Fixed or detachable with the filter cover 1-17 is a drum-shaped filter body 1-19, preferably designed as a cylindrical hollow body.
  • a screw thread 1-18 or a bayonet (not shown) on the filter body 1-19 and a corresponding thread or bayonet (not shown) on the filter cover 1-17 are preferably used to connect the filter cover and filter body.
  • the filter body rotates 1-19, 2-19 during the rotation z.
  • the peripheral filter surface 1-23 formed by the outer surface of the hollow cylindrical filter body 1-19 has small filter openings 1-25, which have an arrangement similar to that of the embodiment according to FIG ID.
  • the filter body 1-19 has a filter bottom 1-27 which forms an end face and, similar to the embodiment according to FIG. 1D, has a multiplicity of inflow openings 1-33 'which are distributed essentially over the entire area of the filter bottom 1-27, which thus forms the inflow zone 1-29 '.
  • a The narrow outer ring area of the surface of the filter base 1-27 is kept free of inflow openings 1-33 '(not shown in FIG. 1J), although this does not appear to be absolutely necessary either.
  • the inner edge of this ring area can be circular, oval or polygonal.
  • webs or other areas without inflow openings can also be located between regions with inflow openings 1-33 '.
  • a bearing axis 1-83 can be provided which, when the device is inserted into the container 1-1, dips from above into a bearing shell 1-85, which can be provided on the bottom of the container 1-1 .
  • the heating device 1-3 'on the lower surface of the bottom of the container 1-1 which, especially in this case and also in other embodiments, can also be made of stainless steel.
  • the filter cover 1-17 of the filter capsule 1-100 is attached to rods 1-200 which are resilient to the outside or inside, whereby the filter cover 1-17 engages behind thickenings 1-203 at the end of the rods 1-200.
  • the rods 1-200 are bent inwards in their upper area by gripping them by hand and the filter cover is then removed.
  • the filter cover 1-17 sealingly engages in a cylindrical filter film forming the filter surface 1-23 - preferably made of food-grade stainless steel.
  • the filter film or filter surface 1-23 has filter openings 1-25, which are preferably produced by photoetching.
  • the inflow zone 1-29 ' has a preferably circular filter film 1-31' - preferably made of food-grade stainless steel - with inflow openings 1-33 ', which are preferably produced by photoetching.
  • the filter foil 1-33 ' together with the lower edge of the cylindrical filter foil forming the filter surface 1-23, is held in an annular base plate 1-201 by means of a ring 1-202.
  • the bottom plate 1-201 also carries the rods 1-200.
  • a space between the rods 1-200 and the filter surface 1-23 ensures that no coffee residues are deposited in this area, which could later lead to an undesirable taste influence of the brew.
  • the filter cover 1-17 with degassing openings 1-34 is connected to the filter shaft 1-15.
  • the filter shaft 1-15 has at its opposite end a permanent magnet 1-204 in a capsule 1-205, the front and / or radial teeth 1-206, preferably in an arrangement as a ring gear.
  • a permanent magnet 1-207 is located in a capsule 1-208 on the drive shaft 1-13 of the drive unit 1-11.
  • the capsule 1-208 has slot-like depressions 1-209.
  • the permanent magnets 1-204 and 1-207 are used in their capsules - e.g. B. injected into plastic apples - that when the filter shaft is attached to the drive shaft, opposite poles face each other and a strong attraction between the permanent magnets and thus a strong axial holding force occurs between the drive shaft and the filter shaft.
  • the teeth 1-206 fall or engage in the corresponding recesses 1-209, so that the torque of the drive unit 11 is transmitted to the filter capsule 1-100.
  • the filter device in the liquid container 2-1 is not held by components of a device, but is attached to a type of stirring rod and is held by the user in operation in the liquid container 2-1 via a handle of this stirring rod.
  • the filter body 2-19 is connected via its filter cover 2-17 and the filter shaft 2-15 to the drive shaft 2-13 of the electric motor 2-11, which is located in a handheld device 2-49.
  • the drive shaft 2-13 is preferably not the drive shaft of the motor 2-11 itself, but rather the drive shaft of a gear unit 2-12 which is mechanically connected downstream of the electric motor 2-11.
  • the electric motor 2-11 is operated with one or more electric batteries or accumulators, which are located in a handle 2-51 in a battery compartment under a battery compartment cover 2-53.
  • the engine 2-11 comes with With the help of a switch 2-55 temporarily energized.
  • the filter capsule 2-100 with the filter body 2-19 and the filter cover 2-17 are essentially identical to the filter capsule of the embodiment according to FIGS. 1 and 1A formed from corresponding components.
  • the filter body 2-19 has the filter surface 2-23 with the filter openings 2-25 and the inflow pipe 2-31 with the filter openings 2-33 and the inflow pipe opening 2-35 and the inflow pipe cover 2-37.
  • the filter body 2-19 advantageously has a ring 2-57 with (not shown) side openings, through which water 2-21 or brew 2-22 into the inlet pipe opening 2-35 and that Inflow pipe 2-31 flows if the filter body 2-19 is accidentally placed on the bottom 2-59 of the container 2-1 by the user of the device while holding the handheld device 2-49.
  • the container 2-1 in the case of the embodiment according to Fig. 2 is preferably a cup, e.g. with a handle 2-5, or a glass jar.
  • the filter shaft 2-15 similarly to hand mixers known per se, is preferably detachably connected to the drive shaft 2-13.
  • filter cover 2-17 which is designed, for example, as a screw cap, is placed back on the filter body 2-19 and the filter capsule 2-100 is connected again via the filter shaft 2-15 to the handheld device 2-49 or its drive shaft 2-13.
  • the cover 2-17 has degassing openings 2-34.
  • the filter shaft 2-15 ' can be designed as a hollow shaft and attached to the filter cover so that the air contained in the filter capsule 2-100 and possibly other therein contained gases in the hollow shaft 2-15 'and through radial or axial (not shown) openings 2-6' and 2-6 "of this hollow shaft can escape to the outside.
  • a propeller 2-8 can also be arranged on the bottom of the filter capsule 2-100, which is connected to the filter body 2-19 and rotates together with the filter capsule.
  • the fins of the propeller are positioned so that the flow of the liquid from below through the inflow openings 2-33 'of the filter base 2-27 into the interior of the filter capsule 2-100 is increased.
  • Such a propeller can also be provided in the other embodiments of the filter device.
  • FIG. 2A shows an embodiment of the device according to the invention, in which the filter device in the container 2-1 'is preferably arranged centrally.
  • the longitudinal webs 2-2 can be formed, for example, by corresponding indentations in the container wall, which is particularly useful when the container is made of glass, ceramic, metal or plastic and the indentations forming the baffles can already be produced during the manufacture of the container.
  • the longitudinal webs 2-2 make it unnecessary to provide a bracket 1-47 shown in FIG. 1 on the lid 1-9 of the container.
  • the longitudinal webs can also on a common, for. B. annular plate, and be inserted with it into the liquid container 2-1 'or removed from it (not shown).
  • a collar-shaped extension 2-87 can be provided on the underside of the handle part 2-51 'which, when the filter capsule 2-100 fastened to the handle part via the filter shaft 2-15' is inserted into the container 2-1 'comes to rest through a correspondingly wide central opening 2-4 of the container lid 2-9' on a collar-shaped seat 2-89 of the container lid 2-9 '. This ensures that the handheld device inserted in the container 2-1 'is mounted on the container lid in the correct operating position and does not have to be held manually during operation.
  • the wide opening 2-4 of the container lid is closed in this way, so that a completely safe splash guard is formed, which in the event of turbulence when pumping around the liquid contained in the container 2-1 'or in the event of other operational disturbances Liquid through the lid opening 2-4 prevented, so that the operator is also protected from the risk of scalding from hot coffee and the risk of contamination of the clothing. Even if the handheld device is not placed on the lid 2-9 ', the lid still provides adequate splash protection.
  • the lid opening 2-4 can be closed by an additional lid (not shown).
  • the container lid 2-9 'as a whole can also be replaced by a decorative lid.
  • a sleeve 2-93 surrounding the filter capsule 2-100 of the filter device with peripheral openings 2-91 can also be used to suppress disturbing turbulence, which at the same time the filter capsule 2-100 and the inner wall of the liquid container 2-1 ' protects against damage.
  • the openings 2-91 can, for example, have a diameter of approximately 5 mm to approximately 8 mm.
  • the sleeve 2-93 furthermore has a guide 2-97 for the filter shaft 2-15 'and preferably degassing openings 2-95 in the form of larger cutouts and is fixedly or releasably connected to the device 2-49' via connecting elements 2-99.
  • the connecting elements can also be designed as a tube and / or telescopically displaceable (not shown).
  • the circulation movement in the water or brew is only greatly weakened in the area outside the sleeve 2-93 and is no longer noticeable as turbulence there.
  • a spilling of the water or brew over the upper edge of the liquid container 2-1 ' is thereby reliably prevented even at high speeds of the filter capsule 2-100.
  • This also makes it possible to use the filter device as a rod-shaped handheld device in containers of any design, such as. B. coffee cups, thermos and the like, use, with a lid-like splash guard or on the lid 2-9 'can also be dispensed with.
  • the handheld device can be with the lower edge of the sleeve 2-93 on the bottom of the Place the liquid container 2-1 'without significantly restricting the circulation of the liquid flow.
  • the lower edge of the sleeve z. B. arched recesses (not shown).
  • the sleeve 2-93 can have baffle-like longitudinal webs on its outer surface (not shown).
  • the connecting elements 2-99 can also be omitted in a simplified version of the filter device, so that the sleeve 2-93 sits loosely on the upper area of the filter cover 2-17.
  • the sleeve 2-93 takes part in the rotation of the filter capsule 2-100 at a lower speed and also dampens the turbulence outside the sleeve in this case. In both cases, the sleeve 2-93 is not firmly connected to the filter capsule 2-100.
  • the sleeve 2-93 acts as a splash guard against the operator and the working environment, since the brew tangentially thrown off by the filter capsule 2-100 is at the Inner wall of the sleeve 2-93 accumulates and drains from there. Brew losses can thus be avoided.
  • the filter material remaining in the filter capsule as a filter cake can be spun dry and thus easily disposed of.
  • a collar-shaped seat 2-87, 2-89 can also be provided for the filter device during operation.
  • FIG. 2C shows an exemplary embodiment with a commercially available coffee, tea or thermo jug as a liquid container 2-1 '.
  • the motor 2-11 ' is mounted on a support plate 2-101.
  • longitudinal slots of the support plate 2-101 are preferably pin-like holding elements 2-103 radially displaceable and are fixed after moving within the can opening 2-4 'until it stops at the edge of the can opening with screws 2-102 on the support plate 2-101 and thus on an individual jug permanently adapted.
  • the filter device in this case designed as a coffee stick, can also be firmly attached laterally in any can after insertion until the support plate 2-101 stops at the edge of the can opening 2-4 '.
  • the pins 2-103 can also rest resiliently.
  • the carrier plate 2-101 and the pins 2-103 of the filter device form a can adapter.
  • the construction of the filter device according to FIG. 2B or 2C corresponds to the construction according to FIG. 2A. However, additional degassing openings 2-6 "'are provided.
  • FIGS. 2A and 2B show, in a further embodiment of the filter device according to the invention, a device 2-49 'with a handle 2-50', which may also be designed as a knob, which drives the drive motor 2-11 'and an on / off switch 2- 55 'or timer and possibly a power supply, circuits and / or other electrical components.
  • the handle part 2-51 ' can be electrically connected via a cable 2-54 (can also contain the on / off switch 2-55' or timer), preferably to a low-voltage power supply (with or without switching elements), so that the handle is fast for safety reasons, no mains voltage, but only a low voltage of up to approx. 12 V, for example.
  • the container 2-1 ' is in this case designed without a heating device, so that the extraction liquid (water, milk, etc.) is filled into the container in the heated state during hot extraction.
  • the extraction liquid water, milk, etc.
  • Such a design is also particularly suitable in the embodiment according to FIG. 2C.
  • the circulation of the water or broth in the tank 1-1 or 2-1 is brought about by rotation of the filter unit, which in this case acts as a circulating pump, the circulation can take place with a fixed filter capsule, including an associated one Inflow pipe can also be brought about by an additionally provided circulation pump.
  • the filter unit which in this case acts as a circulating pump
  • FIGS. 3 and 4 Such further embodiments of the invention are shown in FIGS. 3 and 4.
  • the filter body 3-19 forms the filter capsule 3-100 with a cover 3-71 designed as a hold-down device.
  • this contains a propeller 3-61, which is arranged in the inflow pipe 3-31 in the region of the inflow zone 3-29 or inflow pipe opening 3-35.
  • the propeller shaft 3-63 has a sealing cylinder or ring 3-69, preferably made of a plastic material, which seals the interior 3-70 of the inflow pipe 3-31 or a protective pipe 3-73 connected to the motor unit 3-10 and at the same time to guide the propeller axis 3-63 in the inlet pipe 3-31.
  • the sealing cylinder or sealing ring 3-69 is connected to the drive shaft 3-13 of the electric motor 3-11.
  • the electric motor is 3-11 Via a holding arm 3-65 and a connection 3-67, which is preferably designed as a torsion-proof plug connection, detachably connected to the container lid 3-9.
  • the container lid 3-9 closes the container 3-1 for the water 3-21 or for the brew 3-22 and is particularly removable for cleaning the container.
  • the container 3-1 is equipped with an electrical heating device 3-3. Through an opening 3-75 in the protective tube 3-73, any water 3-21 or broth 3-22 escaping from the interior 3-70 flows back into the tank 3-1.
  • the propeller shaft 3-63 is advantageously detachably connected to the motor 3-11 or the drive shaft 3-13. This makes it easy to use different propellers, e.g. Propellers with different angles of the propeller blades for optimization at different operating speeds.
  • the protective tube 3-73 is used to protect the propeller 3-61 from damage when the motor unit 3-10 is replaced.
  • the lid 3-71 which takes over the function of a hold-down device, is placed or placed on the fresh filter material 3-39, which advantageously has lateral openings 3-77 for the passage of water 3-21 or brew 3-22.
  • the filter capsule 3-100 together with fresh filter material 3-39 and the holding-down device 3-71 put back into the lid 3-9, whereby a detachable connection between the filter capsule 3-100 and lid 3-9 is established. Then the heater 3-3 and the motor 3-11 are turned on.
  • the propeller 3-61 feeds liquid into the inflow pipe 3-31, so that a strong circulation water that circulates the water 3-21 through recesses 3-79 of the protective pipe 3-73, the filter openings 3-33 of the Inflow pipe 3-31, the filter material 3-39 and the filter openings 3-25 of the filter surface 3-23 are formed.
  • the filter surface 3-23 forms an outer surface which is essentially coaxial with the axis of rotation or central axis 3-41. Due to the circulation of the liquid, the filter material 3-39 is increasingly extracted and the water 3-21 is transformed into the brew desired as a coffee or tea drink.
  • the circulation flow passes through the filter material in a predominantly radial direction and is schematically illustrated in FIG. 3 by flow lines 3-44 and 3-45.
  • the finished drink can be removed through a drain 3-72 with a tap.
  • the propeller 3-61 can run at a very high speed - for example approx. 8,000 to 12,000 revolutions / minute - without disturbing side effects, such as unbalance movements of the entire device or turbulence in the water 3-21 or brew 3-22. This means that even very large quantities of strong drinks can be produced in the shortest possible time.
  • the device described above according to the embodiment according to FIG. 3 is particularly suitable for professional use, for example in restaurants.
  • FIG. 4 shows a further embodiment in which, compared to the embodiment according to FIG. 3, the propeller 3-61 has been replaced by a screw conveyor 4-81.
  • This is characterized by high robustness, so that a protective tube corresponding to the protective tube 3-73 of the embodiment according to FIG. 3 can be dispensed with.
  • the sealing cylinder or ring 4-69 lies directly on the inner wall of the inflow pipe 4-31. Otherwise, the description of the embodiment according to FIG. 3 also applies analogously to the embodiment according to FIG. 4.
  • the screw conveyor 4-81 can also be replaced by a screw.
  • a diagonal pump can also be provided in the interior of the filter capsule 3-100, 4-100.
  • the drive unit can be designed as an electric motor with battery or mains power supply or as a spring drive.
  • the circulating pump can also be provided outside the filter device and arranged in a circulating circuit which feeds the circulated liquid, preferably via a line, into the inflow zone or into the inflow pipe of the filter device (not shown).
  • z. 1B inserted or injected into the filter body 1-19 filter segments 1-20, these can be in one or more pieces and can also be designed as a wire screen.
  • the filter shaft 1-15, 2-15, 2-15 ', 3-63, 4-63 can also be attached to the filter base of the filter capsule instead of the filter cover, the filter capsule then after the filter cover and Rotation through 180 ° is coupled to the drive shaft 1-13, 2-13, 3-13, 4-13 located above with respect to the liquid container.
  • the rotation through 180 ° is omitted if the drive shaft is arranged in the bottom region of the container and, for example, projects through the bottom in a liquid-tight manner.
  • a bottom-side magnetic coupling can also be provided (not shown).
  • the filter capsule 1-100, 2-100, 3-100, 4-100 of the filter device does not necessarily have to be cylindrical, but can also have, for example, a cone or bell shape or have other double-curved outer surfaces (including spherical and ellipsoidal shape) (not shown) .
  • the filter body 1-19, 2-19, 3-19, 4-19 and other parts of the filter device consist, for example, of food-grade aluminum, e.g. B. with oxide or paint coatings, or made of food-grade stainless steel or plastic, e.g. B. polycarbonate, polyacetals such as polyoxyethylene, polyethylene, polypropylene or fluoropolymers, optionally also as a coating.
  • food-grade aluminum e.g. B. with oxide or paint coatings
  • food-grade stainless steel or plastic e.g. B. polycarbonate, polyacetals such as polyoxyethylene, polyethylene, polypropylene or fluoropolymers, optionally also as a coating.
  • the filter surface 1-23, 2-23, 3-23, 4-23 of the filter body or the filter segments 1-20 are preferably made of metal foils or sheets made of food-grade metal, e.g. B. stainless steel or titanium.
  • the filter openings 1-25, 2-25, 3-25, 4-25 can advantageously be produced by punching, drilling, by means of laser beams or electron beams or by etching. It is also possible to produce the filter surface or filter segments with the filter openings in an electroplated manner. The use of such manufacturing techniques also makes it possible to design the filter openings with a cross section which widens conically outwards, as a result of which any blockage of the filter openings is reliably prevented even during prolonged operation.
  • the number of filter openings 1-25, 2-25, 3-25, 4-25 is selected as a function of their diameter and can be approximately 600 with an opening diameter of preferably 0.2 mm
  • the approximately square filter openings preferably have a side length of about
  • filter bodies 1-19, 2-19, 3-19, 4-19 with an outer diameter of approximately 24 mm to approximately 70 mm and a filter surface 1-23, 2-23, 3-23 , 4-23 with an axial height of about 25 mm to about 60 mm. It turned out to be advantageous not to provide the ratio of height to diameter significantly greater than 1.
  • the volume of the beverages produced thereby ranged from approximately 70 ml to approximately 1.5 liters.
  • the degassing openings 1-33 ", 2-33", 1-34, 2-34 on the filter cover, and possibly also the inflow openings 1-33 ', 2-33' in the filter base 1-27 or 2-27, to be larger (e.g. about 0.5 mm to about 0.7 mm in diameter) than the filter openings 1-25, 2-25 (e.g. about 0.1 mm, about 0.2 mm or 0.35 mm diameter) on the outer surface of the filter body 1-19, 2-19.
  • the inflow openings can thus be about twice as large or even larger than the filter openings with respect to their diameter or their clear width.
  • the temperature of the liquid when filling is in the range from approximately 90 ° C. to approximately 95 ° C. before extraction.
  • the extraction proves to be at lower temperatures while extending the extraction time, e.g. B. about 20 min at 20 ° C (cold extraction) as advantageous.
  • the liquid is preferably held on a thermostatic or by means of a heating element positive temperature coefficient (PTC) achieved final temperature of about 90 ° C to about 95 ° C, at which extraction is carried out in a preselected time by means of a timer.
  • PTC heating element positive temperature coefficient
  • the heating device can advantageously be used to keep the finished beverage in the liquid container warm, preferably by reducing the average heating power over time.
  • a switch (not shown) can be provided which, for. B. reacts to the removal of the filter unit from the container.
  • Bayonet connections in the filter device can also be provided with push-fit connections.
  • rotation can also take place in alternating directions, the cycle times being adjustable.
  • the filter device and device according to the invention is suitable not only for the preparation of coffee or tea beverages, but also for the preparation of other beverages which are obtained from the filtration of filter material, e.g. B. for the preparation of drinks with cocoa ingredients. It can be used as a liquid instead of water also other liquids intended for beverage preparation, e.g. B also milk.
  • this is obtained from the water or another extraction liquid 1-21, 2-21, 3-21, 4-21 by enrichment with extraction substances from the filter material 1-39, 2-39, 3-39, 4- 39 beverage obtained is also referred to as "brew” if there is no boiling process when the beverage is prepared.
  • the filter device By circulating liquid through the filter capsule it is achieved that in the water 1-21, 2-21, 3-21, 4-21 or Sud 1-22, 2-22, 3-22, 4-22 outside the Any filter device particles such as coffee powder particles are sucked in through the inflow openings 1-33, 1-33 ', 2-33, 2-33', 3-33, 4-33 or through the degassing openings and in the filter unit as filter goods on or in Coffee powder or other filter material is accumulated and thus removed from the water or brew.
  • the filter device also acts as a cleaning filter for the water or the brew. This effect - as well as a self-filtering effect of the filter material forming during the extraction to a filter cake - ensures an extremely low-coffee beverage.
  • the coffee beverages obtained with the filter device described above in various embodiments have pH values which are up to a difference of approximately 0.5 above the There are pH values of coffee beverages that are obtained when using the same types of coffee with conventional coffee machines.
  • the above-mentioned difference in pH values of approx.0.5 is of great importance in terms of taste for beverages such as coffee with a bitter taste component that does not mix with an acid taste component to give a resulting overall taste, with a decreasing pH value - that is to say increasing acidity - can increasingly be perceived as unpleasant.
  • the increase in the pH value of about 0.5 achieved with the filter device according to the invention is also of great importance with regard to digestibility, especially for stomach-sensitive people who usually respond to symptoms with increasing acidity in coffee.
  • the above-described influencing of the coffee beverages in the direction of higher pH values and the intensive extraction as a result of the strong circulation not only achieve a high, aromatic flavor quality of the coffee beverages that is adequate for the freshly ground roasted coffee.
  • up to about 50% of ground coffee can be saved compared to the preparation in conventional devices.
  • the coffee powder can be used as filter material for the production of coffee beverages with a special taste note.
  • B. cinnamon and vanilla are added and extracted together with the coffee powder. Viscous or liquid flavor-forming components such.
  • B. cocoa concentrate, condensed milk or Alcoholic beverages can be added to the liquid, preferably the brew, shortly before the beverage is made, which are then quickly and completely mixed with the coffee components of the brew by the rotation of the filter capsule.
  • liquid containers without a heating device as a thermal vessel, e.g. B. as a double-walled glass vessel or with a surrounding container, for. B. made of plastic, an air cushion, for. B. also with the help of foamed plastics such as polystyrene or polyurethane.
  • a handle is preferably located on the surrounding container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

Un agencement de filtration utile pour préparer des boissons à base de café ou de thé dans un récipient (2-1) de réception d'un liquide est submergé dans le liquide et comprend une capsule de filtration (2-100) qui contient les matières à filtrer (2-39); le liquide dans le récipient circule à travers la capsule de filtration. Cette dernière (2-100) avec les matières à filtrer qu'elle contient peut être entraînée en rotation et/ou comprendre un tube d'amenée (2-31) pourvu d'orifices d'amenée (2-33) par lesquels le liquide est amené aux matières à filtrer dans un sens surtout radial. Un dispositif de préparation de boissons à base de café ou de thé comprend un récipient de liquide (2-1') et un agencement de filtration du type décrit.
EP93919216A 1992-09-01 1993-08-30 Agencement et dispositif de filtration utile pour preparer des boissons a base de cafe et/ou de the Withdrawn EP0660683A1 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DE4229130 1992-09-01
DE4229130 1992-09-01
DE19934302899 DE4302899A1 (de) 1992-09-01 1993-02-02 Vorrichtung zum Zubereiten von Getränken, vorzugsweise Kaffee- oder Teegetränken und vorzugsweise für diese Vorrichtung geeignete Filtereinheit
DE4302899 1993-02-02
DE19934304691 DE4304691A1 (de) 1993-02-02 1993-02-16 Filtereinheit, insbesondere für eine Vorrichtung zum Zubereiten von Getränken, vorzugsweise Kaffee- oder Teegetränken und Verfahren zur Herstellung dieser Filtereinheit
DE4304691 1993-02-16
DE4317902 1993-05-28
DE19934317902 DE4317902A1 (de) 1993-02-02 1993-05-28 Vorrichtung zum Zubereiten von Getränken, vorzugsweise Kaffee- oder Teegetränken, und vorzugsweise für diese Vorrichtung geeignete Filtereinheit
PCT/EP1993/002338 WO1994005191A1 (fr) 1992-09-01 1993-08-30 Agencement et dispositif de filtration utile pour preparer des boissons a base de cafe et/ou de the

Publications (1)

Publication Number Publication Date
EP0660683A1 true EP0660683A1 (fr) 1995-07-05

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Application Number Title Priority Date Filing Date
EP93919216A Withdrawn EP0660683A1 (fr) 1992-09-01 1993-08-30 Agencement et dispositif de filtration utile pour preparer des boissons a base de cafe et/ou de the

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Country Link
EP (1) EP0660683A1 (fr)
AU (1) AU5540894A (fr)
WO (1) WO1994005191A1 (fr)

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US5515366A (en) * 1994-11-17 1996-05-07 International Business Machines Corporation Method and apparatus for direct communication in a TDMA radio communication system
DE102011009429A1 (de) 2011-01-26 2012-07-26 Ravinder Issar Heißgetränkezubereiter
CN103860022B (zh) * 2012-12-18 2016-12-28 主力智业（深圳）电器实业有限公司 全自动泡茶器
DE102014222999A1 (de) * 2014-11-11 2016-05-12 Wmf Ag Flüssigkeitsdurchlässiger Kolben eines Kaffeebereiters
US11000145B2 (en) * 2016-05-20 2021-05-11 Louis Ballezzi Device for brewing beverages in reduced time by means of physical motion

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Publication number Priority date Publication date Assignee Title
BE660397A (fr) *
US1572861A (en) * 1925-07-27 1926-02-09 Larrey Elisa Rotary percolator
GB421950A (en) * 1934-06-23 1935-01-02 Otto Thieme An improved beverage maker
DE693951C (de) * 1938-10-19 1940-07-22 Franz Reinholz Vorrichtung zur Herstellung von Getraenken, z. B. Kaffee
US2355094A (en) * 1940-09-21 1944-08-08 Emmett B Moore Apparatus for making beverages
DE1454235A1 (de) * 1964-12-03 1968-11-21 Guenther Zschernitz Geraet zur Herstellung von Kaffeegetraenk
US3595623A (en) * 1967-05-09 1971-07-27 Inst Divi Thomae Foundation Apparatus for extracting flavoring elements from vegetable matter
NL6813628A (fr) * 1967-09-25 1969-03-27

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Title
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AU5540894A (en) 1994-03-29
WO1994005191A1 (fr) 1994-03-17

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