EP3749510B1 - Schneckenpresse zum kaltpressen von ölsaaten - Google Patents

Schneckenpresse zum kaltpressen von ölsaaten Download PDF

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Publication number
EP3749510B1
EP3749510B1 EP19816507.8A EP19816507A EP3749510B1 EP 3749510 B1 EP3749510 B1 EP 3749510B1 EP 19816507 A EP19816507 A EP 19816507A EP 3749510 B1 EP3749510 B1 EP 3749510B1
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EP
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Prior art keywords
press
housing
screw
nozzle hole
header
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EP19816507.8A
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English (en)
French (fr)
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EP3749510A1 (de
Inventor
Yordan Kirilov IROV
Zdravko Ivanov MARINOV
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.)
Bio Oils Ingenering Eood
Remont Injenering 2000 Ad
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Bio Oils Ingenering Eood
Remont Injenering 2000 Ad
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/221—Extrusion presses; Dies therefor extrusion dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/14—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with only one screw or worm
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00—Production of fats or fatty oils from raw materials
    • C11B1/06—Production of fats or fatty oils from raw materials by pressing

Definitions

  • the invention relates to a screw press for cold pressing of oilseeds, which is used for producing vegetable oils.
  • EP 3459400 A1 discloses a food processor, in particular a home juicer.
  • the food processor comprises a first barrel body and a second barrel body arranged at an angle, and communicating through a communication opening.
  • the first barrel body is provided with a feed inlet and a crushing spiral device. Longitudinal grooves and/or convex ribs are arranged on the inner side of the wall of the first barrel body for better crushing the food.
  • the second barrel body includes a hollow barrel seat and a barrel lid fixed thereto.
  • the barrel seat is provided with a communication opening arranged in the front part of the barrel seat, and juice discharge openings arranged in the lower end part of the barrel seat. A residue discharge opening is formed on the end face of the barrel lid.
  • the second barrel body is provided with an extruder screw with a rounded end which protrudes out of the residue discharge opening. Both crushing spiral device and the extruder screw are connected to a driving component. Guide and residue discharge ribs are distributed along the axial direction of the barrel lid to prevent the rotation of the food residue along the extrusion screw.
  • the extruder screw has a cylindrical part located in the barrel seat, and a conical part located in the barrel lid.
  • the extruder screw includes a rod body and threads arranged thereon, and the area of the cross section of the rod body firstly gradually increases and then gradually decreases from the feed end to the discharge end.
  • the inner diameter of the barrel lid gradually decreases to the discharging end, and the distance between the extruder screw and the inner side wall of the barrel lid decreases gradually.
  • the inclination angle of the barrel lid is within the range of 4° to 30°.
  • This food processor relates to the field of kitchen utensils and is meant for squeezing juice from fruits, vegetables, root plants etc. It is simple in structure, and easy to assemble and clean, and provides higher yield than the yield of previously known home juicers.
  • WO 2013/135303 discloses a screw press for cold pressing of oilseeds, comprising a cylindrical housing, having a screw for conveying and compressing the oilseeds, from which the oil is extracted.
  • An inlet opening connected to a hopper for charging of oilseeds is provided in the front upper part of the housing.
  • a zone of outlet openings for taking out the pressed out oil is provided in the housing between its rear end and the inlet opening.
  • the screw ends with a slightly rounded screw header coaxially placed against a press head, said press head having a central opening and a front header bevelled towards the central opening.
  • the known press includes also a nozzle with a hole converting into a discharge opening for taking out the solid residue. Oilseeds, entering through the inlet opening, fall onto the screw, which conveys them forward, pressing them to the inner wall of the housing, and as a result, part of the oilseeds are smashed and/or chopped up, when getting in contact with the edges of the spline ways.
  • the seed mass passes between the screw header and the press head and some of the seed oil is being pressed out.
  • the oil flows back through the spline ways and through the porous seed mass to the outlet zone of the housing, and the seed mass, in the form of a thick compact cylinder, enters the nozzle, where the actual pressing takes place. Due to the thickness and density of the material, a great part of the oil pressed out in the nozzle cannot flow back to the outlet zone despite the difference in the pressure, and remains in the solid residue, thus reducing the yield. Productivity is also low. For example, for standard sunflower with oil content of 42%, the yield of the known press is 28-30%, with productivity up to 50-70 kg/h.
  • the indexes are even lower when pressing hard seeds, for example rosehip seeds, as a big part of the seeds cannot be cut and crushed, and remain whole in the solid residue.
  • the yield of rosehip seeds with oil content of 4.8-7% is 1-1.3%, the productivity is 50-70 kg/h.
  • the low yield and productivity of the known press reduces the profitability of the pressing process and increases the cost of the pressed out oil. Besides, the high oil content of the solid residue shortens its storage life, and makes its usage difficult.
  • EP 1 629 965 A2 discloses a screw press in accordance with the preamble of claim 1, for cold pressing of vegetable oil, such as rapeseed oil, sunflower oil, linseed oil.
  • the press is considered to be the closest prior art. It comprises a cylindrical housing with an O-axis and tooth-shaped depressions provided on the inner wall of the rear part of the housing.
  • An extruder screw with a slightly rounded header is arranged in the housing, said extruder having a cross-section which decreases towards the screw's header.
  • An inlet opening connected by a feed funnel to a feed hopper for oilseeds is provided in the front part of the housing, and radial outlet openings for discharging the pressed out oil are provided in the rear part of the housing.
  • An axially adjustable press head is fixed to the rear end of the housing.
  • the press head is a solid cylinder with a central opening and a front header located coaxially against the screw header. Tooth-shaped recesses extending radially from the central opening and ending at a distance of 1/3 from the outer wall of the press head are provided in the front header of said press head.
  • the screw header is provided with a small screw tip which purpose is to direct the seed mass to the central opening of the press head.
  • the press comprises also a nozzle shaped as a truncated cone converting to a discharge opening for discharging the solid residue and a cracker for breaking the solid residue emerging from the nozzle hole.
  • This press is meant for pressing of soft-shell seeds with high oil content, such as rapeseed oil, sunflower oil, linseed oil.
  • the seeds enter the housing through the inlet and fall onto the extruder screw which pushes them towards its end.
  • the pressure gradually raises.
  • a small part of the seeds, the ones that are pressed between the edges of the extruder screw and the inner wall of the housing are crushed and smashed and the seed mass becomes oily and slippery.
  • Reaching the end of the extruder screw the seed mass is pushed into the space between the screw header and the front header of the press head where the oilseeds are crashed and smashed and part of their oil content is pressed out, the seed mass resulting into a compact greasy cake with a slippery surface.
  • Part of the pressed out oil flows back where the pressure is lower and leaves the press through the outlet openings, the rest of the pressed out oil remains in the material which is pushed further on to the central opening of the press head.
  • the tooth-shaped depressions provided on the inner wall of the rear part of the housing, and the tooth-shaped recesses provided in the front header of the press head prevent the co-rotation of the material in the respective zones by building up a counter pressure.
  • the co-rotation of the material is one of the main challenges when pressing seeds with high oil content, such as rapeseed, sunflower seeds, linseeds.
  • the material enters the nozzle hole where the pressure sharply rises and the crushed but not yet smashed seeds are smashed and their oil content is pressed out.
  • the primary object of the invention is to make a screw press for cold pressing of any type of oilseeds, including very hard ones, ensuring high productivity and yield; a low temperature of the pressed out oil; low oil content of the solid residue, and easy to operate.
  • a press for cold pressing of oilseeds having a cylindrical housing with an O-axis.
  • the inner wall of the housing is provided with longitudinal spline ways.
  • An inlet opening connected to a hopper for seeds is provided in the front part of the housing.
  • a zone of outlet openings for taking out the pressed out oil is provided in the middle part of the housing.
  • a screw with a slightly rounded screw header is provided in the housing.
  • a press head is fixed to the housing, said press head is a solid cylinder with a central opening and a front header, located coaxially against the screw header.
  • the front header of the press head is provided with triangular splines with a triangular cross section, which extend radially from the central opening and are located symmetrically to it, and the apexes of said triangular splines lie close to the outer wall of the press head.
  • the press includes also a nozzle with a nozzle hole converting into a discharge opening for discharging the solid residue.
  • the nozzle hole and the discharge opening are truncated circular cones with a small common base.
  • the generant k 1 of the nozzle hole forms an angle ⁇ with the axis of the housing.
  • a screw tip which includes a cylindrical part, located into the central opening of the press head and the very beginning of the nozzle hole, and a conical part, located in the nozzle hole and the front part of the discharge opening.
  • the cylindrical part of the screw tip is shaped as a multiple thread screw, and the conical part - as a truncated circular cone.
  • the generant k 2 of the conical part of the screw tip forms an angle ⁇ with the axis of the housing, whereby angle ⁇ is smaller than angle ⁇ .
  • a conical gap with width b which decreases towards the narrowest part of the nozzle hole.
  • the triangular splines are 3 to 8. In one preferred embodiment triangular splines are 4.
  • the outlet openings for the pressed out oil are located close to the inlet opening.
  • angle ⁇ is preferable to be smaller than angle ⁇ by 2° to 3°.
  • the width b of the conical gap in the narrowest part of the nozzle hole is within the range 0.5 mm ⁇ 1.0 mm.
  • the screw tip is secured to the screw by a detachable screw joint.
  • the advantages of the press for pressing oilseeds according to the invention are that it has high productivity and provides high yield at low temperature of the pressed out oil. What is more, the press is effective for all kind of seeds, including very hard ones, such as rosehip seeds. The solid residue has a low residual oil content, which facilitates its storage and use.
  • the press according to the invention is easy for maintaining and working with different kind of oilseeds and no special qualification of the operators is required.
  • Fig. 1 - 6 clarify a preferred embodiment of a press for pressing out of oilseeds, according to the invention.
  • the press comprises horizontally located cylindrical housing 1 with longitudinal O-axis. Longitudinal spline ways 2 are provided in the inner wall of the housing 1.
  • An inlet opening 3 connected to a hopper 4 for oilseeds is provided in the front upper part of the housing 1. Close to the inlet opening 3 in the housing 1 there are outlet openings 5 for discharging of the pressed out oil.
  • the outlet openings 5 are located transversely to the wall of the housing 1 and have the shape of truncated circular cone, where the small base of the cone is in the middle of the longitudinal spline ways 2, and the large base is on the outer surface of the housing 1.
  • a screw 6 connected to an electric motor through a gear unit (not shown in the figure) is provided in the housing 1.
  • the screw 6 has a slightly rounded screw header 7.
  • a press head 8 is located coaxially against the screw header 7 of the screw 6, said press head 8 is a solid cylinder with a central opening 9 and a front header 10.
  • Triangular splines 11 with a triangular cross section are provided in the front header 10 of the press head 8.
  • the triangular splines 11 extend radially from the central opening 9 and are located symmetrically to it with apexes lying next to the outer wall of the press head 8. In this preferred embodiment, there are four triangular splines.
  • the press head 8 is fixed to the housing 1 by a front flange 12.
  • the front flange 12 holds a nozzle holder 13 in which a nozzle 14 with a nozzle hole 15 is mounted, said nozzle hole 15 converts to a discharge opening 16 to discharge the solid residue.
  • the nozzle hole 15 and the discharge opening 16 are shaped as truncated circular cones with a small common base.
  • the generant k 1 of the nozzle hole 15 forms an angle ⁇ with the longitudinal O-axis of the housing 1.
  • a screw tip 17 which comprises a cylindrical part 18 in the form of a multiple thread screw, and a conical part 19 in the form of a truncated circular cone.
  • the cylindrical part 18 is placed in the central opening 9 of the press head 8 and the very beginning of the nozzle hole 15, and the conical part 19 is placed in the rear part of the nozzle hole 15 and the front part of outlet opening 16.
  • a generant k 2 of the conical part 19 of the screw tip 17 forms an angle ⁇ with the longitudinal O-axis of the housing 1, whereby angle ⁇ is smaller than angle ⁇ by 2° to 3°, thus forming a conical gap between the conical part 19 and the nozzle hole 15, the width b of the conical gap, decreasing towards the narrowest part of the nozzle hole 15.
  • the press can be conditionally divided into several zones in view of the processes going on in the zones, as shown in fig. 6 .
  • Zone A covers the section from the inlet opening 3 to the end of the outlet openings 5. Oilseeds are put into the hopper 4 and through the inlet opening 3 enter the housing 1 and fall onto the screw 6. The quantity of oilseeds in the hopper 4 provides some 800-900 mm seed column on the inlet opening 3. In its rotation the screw 6 drags the seed mass forward and conveys it to the rear end of the housing 1, repeatedly loosening it at low pressure, thus making the seed mass porous.
  • Zone B covers the section between the zone for taking out the pressed oil, where the outlet openings 5 are located, and the end of the screw 6.
  • the pressure in this zone is higher than the pressure in zone A and steadily raising towards the end of the screw 6 to reach values of about 50 bar.
  • Smashing, chopping and crushing of the oilseeds continues in this zone.
  • the seed mass is porous as it is subjected to repeated loosening by the screw 6 and is of a low temperature, as the pressure in this zone is low - up to about 50 bar.
  • the pressed out oil in this zone flows back through the porous seed mass because the pressure there is lower, and leaves the housing 1 through the outlet openings 5. Passing through the porous seed mass, the pressed out oil is filtered and cooled to a temperature close to that of the incoming raw material.
  • Zone C covers the section between the screw header 7 of the screw 6 and the front header 10 of the press head 8.
  • the seed mass pushed out by the screw 6 enters the space between the screw header 7 of the screw 6 and the front header 10 of the press head 8, where it is subjected to repeatedly and consecutively pressing into a thin layer of about 1-2 mm, and loosening by the radially located triangular splines 11 in the front header 10 of the press head 8.
  • the pressure in this zone rises sharply to about 300 bar.
  • When pressed onto the edges of the triangular splines 11 the remaining whole oilseeds are cut and/or fragmented.
  • the oil pressed out in this zone returns in a backward flow to zone A, where filtered and cooled the oil exits the press through the outlet openings 5.
  • Zone D covers the section from the front header 10 of the press head 8 to the middle of the central opening 9 where the cylindrical part 18 of the screw tip 17 is located. As it passes through this zone the material is repeatedly loosened by the cylindrical part 18 which is in the form of a multiple thread screw, thus retaining its porosity. The pressure in this zone rises to reach about 400 bar at the end of the zone, and the temperature of the material also rises. The remaining whole seeds are pressed against the edges of the multiple thread screw and are cut and/or crushed. The pressed out oil returns backwards to the outlet openings 5 and exits filtered and cooled.
  • Zone E covers the section from the middle of the central opening 9 to the end of the nozzle hole 15.
  • the material enters the gap between the nozzle hole 15 and the conical part 19 of the screw tip 17, which narrows towards the end of the nozzle hole 15.
  • the pressing continues in a thin layer of 0.3 to 0.5 mm at high pressure, reaching about 700 bar at the end of the nozzle hole 15, where the gap is smallest. Due to the small thickness of the layer and the large difference in the pressure the pressed out oil flows backwards to zone D and from there through the porous seed mass reaches the outlet openings 5 through which it exits filtered and cooled to a temperature of 20°C - 40°C depending on the temperature of the raw material.
  • Zone F covers the section of the discharge opening 16.
  • the solid residue enters the discharge opening 16 in the form of a thin-walled hose, which sputters as it exits the discharge opening 16, since the oil content is very low.
  • the press can run in a continuous mode of operation for up to 11 months, after which the screw tip needs to be replaced as because of the great friction it wears out faster than other parts of the press.
  • the press can press all types of oilseeds by changing the speed of the motor depending on the hardness of the seeds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Fats And Perfumes (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)

Claims (9)

  1. Eine Presse zum Kaltpressen von Samen, umfassend ein zylindrisches O-Achsen-Gehäuse mit Ölablasslöchern (5) zum Ablassen des gepressten Öls, und eine Schnecke (6) mit abgerundeter Schneckenstirn (7), platziert im Gehäuse (1), indem auf der Stirn (7) der Schnecke (6) eine Druckspitze (17), und an der Vorderseite des Gehäuses (1) eine Einlassöffnung (3) vorgesehen ist, die mit einem Behälter (4) für Samen verbunden ist, wobei die Presse auch einen Pressenkopf (8) enthält, darstellend ein fester Zylinder mit einer zentralen Bohrung (9) und einer vorderen Stirn (10), der koaxial gegenüber der Stirn (7) positioniert ist, indem radial aus der zentralen Bohrung (9) ausgehende Schlitze (11) in der vorderen Stirn (10) vorgesehen sind, wobei die Presse auch eine Düse (14) mit einem Düsenloch (15) in Form eines Kreiskegelstumpfes mit einer Mantellinie k1 enthält, die einen Winkel α mit der O-Achse des Gehäuses bildet, wobei der Düsenloch (15) in ein Auslassloch (16) zur Herausführung der festen Rückstände übergeht, dadurch gekennzeichnet, dass an der Innenseite des Gehäuses (1) Längsschlitzkanäle (2) vorgesehen sind, und sich die Ablasslöcher (5) im mittleren Teil des Gehäuses (1) befinden, wobei die Nuten (11) dreieckig sind und einen dreieckigen Querschnitt haben und Spitzen neben der Außenwand des Pressenkopfs (8) haben, indem die Schlitze (11) symmetrisch auf der vorderen Stirn (10) des Pressenkopfs (8) angeordnet sind, der Auslassloch (16) ist ein Kreiskegelstumpf mit einer kleinen Basis, die mit der kleinen Basis der Düse (15) eine Einheit bildet, wobei die Druckspitze (17) ein zylindrisches Teil (18) in Form einer mehrgängigen Schnecke enthält, die sich in der zentralen Bohrung (9) des Pressenkopfs (8) und an der Vorderseite des Düsenlochs (15) befindet, und ein konisches Teil (19) in Form eines Kreiskegelstumpfes mit einer Mantellinie k2, der sich im Düsenloch (15) und dem vorderen Teil des Auslasslochs (16) befindet, wobei die Mantellinie k2 mit der O-Achse des Gehäuses (1) einen Winkel β bildet, der kleiner als Winkel α ist, wobei zwischen dem Düsenloch (15) und dem konischen Teil (19) der Druckspitze (17) ein Spalt b befindet, der in Richtung des engsten Teils des Düsenlochs (15) abnimmt.
  2. Eine Presse nach Anspruch 1, dadurch gekennzeichnet, dass die Anzahl der dreieckigen Schlitze (11) im Pressenkopf (8) 3 bis 8 beträgt.
  3. Eine Presse nach Anspruch 2, dadurch gekennzeichnet, dass die dreieckigen Schlitze (11) vier sind.
  4. Eine Presse nach Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass 15° ≤ α ≤ 25°.
  5. Eine Presse nach Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass
    Figure imgb0002
    β 2 bis 3 Grad kleiner als
    Figure imgb0002
    α ist.
  6. Eine Presse nach Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass die Ablasslöcher (5) quer an der Wand des Gehäuses (1) angeordnet und kegelstumpfförmig mit Durchmessern d1 der kleinen Basis und d2 der großen Basis sind, so dass die kleinen Basen in der Mitte der Längsschlitzkanäle (2) liegen, wobei d1 0,5 bis 1,5 mm und d2 1,5 bis 2,5 mm beträgt.
  7. Eine Presse nach Anspruch 6, dadurch gekennzeichnet, dass d1 = 1mm, d2 = 2 mm.
  8. Eine Presse nach Ansprüchen 1 bis 7, dadurch gekennzeichnet, dass der Spalt b im engsten Teil des Düsenlochs (15) 0,5 mm bis 1,0 mm beträgt.
  9. Eine Presse nach Ansprüchen 1 bis 8, dadurch gekennzeichnet, dass die Kegelspitze austauschbar ist.
EP19816507.8A 2019-04-30 2019-11-05 Schneckenpresse zum kaltpressen von ölsaaten Active EP3749510B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG11292719 2019-04-30
PCT/BG2019/050002 WO2020220096A1 (en) 2019-04-30 2019-11-05 Screw press for cold pressing of oilseeds

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EP3749510A1 EP3749510A1 (de) 2020-12-16
EP3749510B1 true EP3749510B1 (de) 2022-10-19

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CN112779085A (zh) * 2020-12-24 2021-05-11 澧县洞庭春油脂工业有限公司 一种具有多次冲压的菜籽油挤压装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629965A2 (de) * 2004-08-24 2006-03-01 Anton Fries Maschinenbau GmbH Vorrichtung zur Herstellung von Pflanzenölen

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Publication number Priority date Publication date Assignee Title
US4632795A (en) * 1982-11-26 1986-12-30 Wenger Manufacturing, Inc. Method and apparatus for extrusion processing of cellulose bearing materials
CH674474A5 (de) * 1987-12-07 1990-06-15 Max Gutknecht
RU2041924C1 (ru) * 1992-06-04 1995-08-20 Производственное объединение "Юргинский машиностроительный завод" Масловыжимной пресс
JPH09234593A (ja) * 1996-02-29 1997-09-09 Topy Ind Ltd シュレッダ−ダストの脱水・粉砕装置
KR100615456B1 (ko) * 2004-03-12 2006-11-17 남주희 싱크대용 음식물쓰레기 처리장치
KR20130063262A (ko) * 2011-12-06 2013-06-14 주식회사 소냐엘에스 음식물 쓰레기 처리기
EP2825396A1 (de) 2012-03-16 2015-01-21 IBG Monforts Oekotec GmbH & Co. Kg Schneckenpresse zum herstellen von ölen
EP3459400B1 (de) * 2016-07-06 2020-10-28 Guangdong Midea Consumer Electrics Manufacturing Co. Ltd. Küchenmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629965A2 (de) * 2004-08-24 2006-03-01 Anton Fries Maschinenbau GmbH Vorrichtung zur Herstellung von Pflanzenölen

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