EP0002739B1 - De-watering press - Google Patents

De-watering press Download PDF

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Publication number
EP0002739B1
EP0002739B1 EP78101694A EP78101694A EP0002739B1 EP 0002739 B1 EP0002739 B1 EP 0002739B1 EP 78101694 A EP78101694 A EP 78101694A EP 78101694 A EP78101694 A EP 78101694A EP 0002739 B1 EP0002739 B1 EP 0002739B1
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EP
European Patent Office
Prior art keywords
press
sammier
counterpressure
hose
roll
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.)
Expired
Application number
EP78101694A
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German (de)
French (fr)
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EP0002739A1 (en
Inventor
Arnold Becker
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Louis Schweizer & Co KG Lederfabrik GmbH
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Louis Schweizer & Co KG Lederfabrik GmbH
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Publication of EP0002739A1 publication Critical patent/EP0002739A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00Drying solid materials or objects by processes not involving the application of heat
    • F26B5/14Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B9/00Presses specially adapted for particular purposes
    • B30B9/02Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/24Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
    • B30B9/246The material being conveyed around a drum between pressing bands
    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00Manufacture of leather; Machines or devices therefor
    • C14B1/30Pressing or rolling leather
    • C14B1/34Pressing or rolling leather by rotating movement of the pressing or rolling elements
    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00Manufacture of leather; Machines or devices therefor
    • C14B1/58Drying

Definitions

  • the invention relates to a wilting press for leather and fur with a middle pressure roller with an elastically deformable jacket, counter pressure rollers supporting it on the circumferential side and with two co-moving by frictional engagement, the material to be squeezed out between receiving and moving through the conveyor belts formed between the pressure roller and the counter pressure rollers , of which at least the conveyor belt located outside in the area of the pressure roller consists of a water-permeable material.
  • Wilting presses are used in the leather and fur industry to drain the goods. It depends in particular on the throughput and the remaining moisture, as well as on the treatment of the material when it wilts off.
  • a wilting press with two press plates is known (DE-B-22 49 369), which works in intermittent operation.
  • the material is brought between the two press plates with a conveyor.
  • a pressure cushion is built up at least on a press plate which is spanned by a membrane, with which the introduced material is pressed.
  • the intermittent operation of this wilting press brings only a small throughput and the large press area requires high pressures, which requires a correspondingly dimensioned machine structure. Despite the small throughput, such a wilting press is large in structure and expensive to buy and maintain.
  • Wilting presses are also known in which the material is continuously conveyed through the machine.
  • two conveyor belts are guided in parallel at a short distance from one another.
  • On the outside of the conveyor belts act several successively arranged press runners or press rolls.
  • the leather is inserted between the belts and pulled by them through the pressing members.
  • a vacuum device is arranged behind each press zone and is intended to suck off the water that is squeezed out.
  • This machine too, is complicated and expensive, and is very space-consuming due to the linear passage of the goods. The drainage is also not sufficient.
  • a further known wilting press rigid pressure rollers and counter-pressure rollers are used, the counter-pressure rollers being pressed against the pressure roller by means of compression springs or pneumatic pressure pads.
  • the conveyor belts are designed as felt belts and absorb the squeezed liquid.
  • This known continuous wilting press is very expensive to maintain because the felt belts have to be replaced after an operating time of about 6 to 8 months because of their deformation, since they can no longer absorb the squeezed-out liquid to a sufficient extent.
  • folds are pressed into the material in such a way that they cannot be completely removed during subsequent treatment.
  • a roller press is known (DE-B-10 30 184), which is primarily used for pressing liquid from moist masses, e.g. Fruit mashing is suitable, but can also serve to drain leather. It has a large pressure roller with an elastic jacket and a large number of small counter-pressure rollers which are distributed close to one another over the circumference of the pressure roller. Two conveyor belts, which are entrained by friction, run through the nip, between which the material to be pressed is fed and from which it is transported through the nip. The outer conveyor belt is permeable, so that the squeezed liquid can run off to the outside.
  • the pressure roller with its elastic jacket should either be under atmospheric pressure or be filled with a pressure medium. Obviously, only relatively low pressures are considered here, since the jacket of the pressure roller is strongly deformed inwards by each individual counter-pressure or support roller. Such an arrangement is unsuitable for wilting leather, since due to the wave-like deformations of the pressure roller, a skin running through the nip would be exposed to constantly changing tensile and thrust forces, which inevitably lead to the formation of wrinkles. In addition, very high pressures are required for wilting leather and furs, since only part of the water is available as surface water, but a very large part is capillary-bound.
  • this capillary-bound water can only be expelled using high pressures, which, given the size of the skin and its uneven thickness, must also be applied over a large area with a changing size of the nip.
  • Such pressures cannot be controlled with the known arrangement due to the strong flexing forces to which the elastic jacket is exposed.
  • the invention is based on the object of designing the wilting press in such a way that the pressures required in particular for pressing off the capillary water can be applied with a gentle treatment of the skin.
  • the arrangement of four counter-pressure rollers ensures that the hose is supported symmetrically.
  • the centering of the hose between the counter-pressure rollers is achieved in that it is wrapped on the majority of its circumference by the conveyor belts, which - since they do not have to be made of elastic material - do not yield in the radial direction.
  • retrofit zones are built up between the individual counter-pressure rollers by the conveyor belts and the goods lying between them running in tensioned condition over the pressure roller. The goods need only be smoothed once at the inlet and then maintains this position.
  • the inlet for the material to be dewatered is provided via a counter-pressure roller arranged in the horizontal plane and the run is provided on the counter-pressure roller lying above after passing through the other counter-pressure rollers.
  • the formation of the pressure pad on the pressure roller is carried out according to one embodiment so that the pressure roller is designed as a pipe section and is spaced from a hose section around that the pipe section and the hose section are airtightly connected to each other at the end faces, and that between the pipe section and the chamber formed in the tube section is filled with compressed air.
  • the chamber can be under constant pressure or be pressurized and maintained during commissioning.
  • a compressed air line is introduced into the pipe section, which is welded airtight into a bore in the wall of the pipe section and opens into the chamber between the pipe section and the hose section. It is therefore only necessary to supply the chamber and not the entire roller with compressed air.
  • the centerpiece of the new wilting press is the pressure roller 11, which is equipped with a pressure pad and consists of a tube section 10 and an elastic hose 12 surrounding it.
  • An airtight chamber 13 is formed between the outer surface of the pipe section 10 and the inner wall of the hose section 12.
  • the inside diameter of the hose section 12 is therefore larger than the outside diameter of the pipe section 10.
  • the pipe section 10 and the hose section 12 are of the same length and are connected to one another in an airtight manner on both end faces.
  • a spacer ring 30 is applied to the outside of the tube section 10 in the region of the end face, over which the elastic hose 12 is placed, as can be seen in the partial section according to FIG.
  • tensioning screws are adjustable which press individual tensioning segments 32 against the tube 12 and this in turn against the spacer ring 30.
  • the mutually facing surfaces of the spacer ring 30 and the tensioning segments 32 are provided with coordinated, preferably circumferential profiles 31 and 33, which ensure a clear jamming of the hose 12.
  • the clamping segments 32 which e.g. can be partially annular, a wedge surface 36.
  • a corresponding wedge surface 37 of a tensioning device 34 acts against this and is tightened by means of coaxial screws.
  • a compressed air line 25 is passed through the bearing axis 28 of the pressure roller, which is rotatably mounted in the bearing 29.
  • the compressed air line 25 is guided into a bore 24 in the wall of the pipe section 10 and welded therein in an airtight manner, so that the compressed air line 25 opens into the chamber 13 between the pipe section 10 and the hose section 12.
  • the compressed air line 25 is therefore non-rotatably connected to the pipe section 10 and the bearing axis 28.
  • the end of the compressed air line 25 protruding from the bearing axis 28 is provided with a rotary coupling 26 so that a stationary compressed air connection can be attached.
  • the chamber 13 is filled continuously or only during the operating time with compressed air of approx. 10 to 25 atm, so that the elastic hose 12 is pressed apart accordingly.
  • This hose 12 is preferably provided with a fabric insert and has a wall thickness of 10 to 20 mm in order to withstand this pressure.
  • each counter-pressure roller 14 15, 16 and 17 are arranged around the pressure roller, of which the counter-pressure rollers 14 and 16 are arranged approximately in a horizontal plane and the counter-pressure rollers 15 and 17 approximately in a vertical plane.
  • These four counter-pressure rollers 14, 15, 16 and 17 form with the pressure roller 11 four narrow press zones, on which the hose 12 can hardly expand.
  • the two conveyor belts 22 and 23 are provided for guiding the goods, at least the lower conveyor belt 22 being perforated and made of plastic or steel.
  • the lower conveyor belt 22 forms with its loop from the deflecting roller 18 in front of the counter-pressure roller 14 a feed device for the material to be dewatered.
  • the lower conveyor belt 22 encloses the hose 12, but faces the counter-pressure rollers 14, 15, 16 and 17 and passes through all the pressing zones.
  • the upper conveyor belt 23 is also guided in the same way, but is turned towards the hose 12 and guided around the pressure roller.
  • the deflecting roller 20 for the upper conveyor belt 23 is arranged so that the material fed on the lower conveyor belt is drawn in between the two conveyor belts 22 and 23 guided around the deflecting roller 20 and the inlet counter-pressure roller 14 and successively the pressing zones the counter pressure rollers 14, 15, 16 and 17 is supplied.
  • the conveyor belts 22 and 23 only have a guiding function, and the squeezed liquid can flow through the openings of these conveyor belts.
  • the dewatering process is determined by the pressure of the compressed air in the chamber 13.
  • the counter-pressure rollers 14, 15, 16 and 17 are provided with a rubber coating and the elastic hose 12 also has sufficient flexibility in the press zones, the material is treated gently when it passes through this new wilting press and leaves the wilting press with a very small residual moisture. Since the hose 12 is bulged between the pressing zones and pressed against the conveyor belts 22 and 23, a repressing operation is carried out between the counter-pressure rollers 14 and 15, 15 and 16 and 16 and 17.
  • the driven pressure roller takes the conveyor belts 22 and 23 in the indicated arrow directions by friction and also the counter-pressure rollers 14, 15, 16 and 17, as well as the deflection rollers 18, 19, 20 and 21 are inevitably rotated by friction in the directions indicated.
  • the loop of the lower conveyor belt 22 is closed via the deflection roller 19, the lower counter-pressure roller 15 to the inlet deflection roller 18.
  • the section of the lower conveyor belt 22 between the outlet counter-pressure roller 17 and the deflection roller 19 serves as a discharge device for the dewatered material.
  • the upper conveyor belt 23 is guided around the deflecting roller 21 and the loop is closed directly by the inlet deflecting roller 20.
  • the upper counter-pressure roller 17 is driven and takes both the conveyor belts and the pressure roller and thus also the other counter-pressure rollers 14, 15, 16 with them.
  • the counter-pressure rollers 14, 15, 16 and 17 can be provided on their outer surfaces with a profiling which mainly removes water to the side.
  • the squeezed liquid can easily be collected in a tub.
  • two pressure rollers can be arranged one behind the other in the conveying direction.
  • two adjacent counter-pressure rollers can be used at the same time work together two pressure rollers, so that only six counter pressure rollers are required, but eight press zones are formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
  • Press Drives And Press Lines (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

Die Erfindung betrifft eine Abwelkpresse für Leder und Pelz mit einer mittleren Druckwalze mit einem elastisch verformbaren Mantel, sich darauf umfangsseitig abstützenden Gegendruckwalzen und mit zwei durch Reibungsschluß mitbewegten, das auszupressende Gut zwischen sich aufnehmenden und durch die zwischen der Druckwalze und den Gegendruckwalzen gebildeten Preßzonen hindurchbewegenden Förderbändern, von denen zumindest das im Bereich der Druckwalze außenliegende Förderband aus einem wasserdurchlässigen Werkstoff besteht.The invention relates to a wilting press for leather and fur with a middle pressure roller with an elastically deformable jacket, counter pressure rollers supporting it on the circumferential side and with two co-moving by frictional engagement, the material to be squeezed out between receiving and moving through the conveyor belts formed between the pressure roller and the counter pressure rollers , of which at least the conveyor belt located outside in the area of the pressure roller consists of a water-permeable material.

Abwelkpressen werden in der Leder- und Pelzindustrie zum Entwässern des Gutes eingesetzt. Dabei kommt es insbesondere auf den Durchsatz und die verbleibende Restfeuchte, sowie auf die Behandlung des Gutes beim Abwelken an.Wilting presses are used in the leather and fur industry to drain the goods. It depends in particular on the throughput and the remaining moisture, as well as on the treatment of the material when it wilts off.

Es ist eine Abwelkpresse mit zwei Preßplatten bekannt (DE-B-22 49 369), die im intermittierenden Betrieb arbeitet. Mit einer Fördereinrichtung wird das Gut zwischen die beiden Preßplatten gebracht. Dann wird mittels einer Hydraulik zumindest an einer Preßplatte, die von einer Membran überspannt ist, ein Druckpolster aufgebaut, mit dem das eingebrachte Gut gepreßt wird. Der intermittierende Betrieb dieser Abwelkpresse bringt nur einen kleinen Durchsatz und die große Preßfläche erfordert große Drücke, was einen entsprechend dimensionierten Maschinenaufbau bedingt. Eine derartige Abwelkpresse ist trotz des kleinen Durchsatzes groß im Aufbau und teuer in der Anschaffung und Wartung.A wilting press with two press plates is known (DE-B-22 49 369), which works in intermittent operation. The material is brought between the two press plates with a conveyor. Then, by means of a hydraulic system, a pressure cushion is built up at least on a press plate which is spanned by a membrane, with which the introduced material is pressed. The intermittent operation of this wilting press brings only a small throughput and the large press area requires high pressures, which requires a correspondingly dimensioned machine structure. Despite the small throughput, such a wilting press is large in structure and expensive to buy and maintain.

Es sind ferner Abwelkpressen bekannt, bei denen das Gut kontinuierlich durch die Maschine gefördert wird. Bei einer Ausführungsform (DE-A-17 60 381) sind zwei Förderbänder in geringem Abstand voneinander parallel geführt. Auf die Außenseite der För derbänder wirken mehrere hintereinander angeordnete Preßkufen oder Preßrollen. Das Leder wird zwischen die Bänder eingeführt und von diesen durch die Preßorgane gezogen. Hinter jeder Preßzone ist einer Vakuumeinrichtung angeordnet, die das ausgepreßte Wasser absaugen soll. Auch diese Maschine ist kompliziert und teuer aufgebaut und wegen linearen Durchlaufs des Gutes sehr platzaufwendig. Auch ist die Entwässerung nicht ausreichend.Wilting presses are also known in which the material is continuously conveyed through the machine. In one embodiment (DE-A-17 60 381), two conveyor belts are guided in parallel at a short distance from one another. On the outside of the conveyor belts act several successively arranged press runners or press rolls. The leather is inserted between the belts and pulled by them through the pressing members. A vacuum device is arranged behind each press zone and is intended to suck off the water that is squeezed out. This machine, too, is complicated and expensive, and is very space-consuming due to the linear passage of the goods. The drainage is also not sufficient.

Bei einer weiterhin bekannten Abwelkpresse werden starre Druckwalzen und Gegendruckwalzen verwendet, wobei die Gegendruckwalzen über Druckfedern oder pneumatische Druckkissen an die Druckwalze angepreßt werden. Die Förd erbänder sind als Filzbänder ausgebildet und saugen die ausgepreßte Flüssigkeit auf. Diese bekannte Durchlauf-Abwelkpresse ist in der Wartung sehr teuer, da die Filzbänder aufgrund ihrer Deformierung schon nach einer Betriebszeit von ca. 6 bis 8 Monaten ausgetauscht werden müssen, da sie nicht mehr in genügendem Maße die ausgepreßte Flüssigkeit aufnehmen können. Außerdem werden bei dieser Durchlauf-Abwelkpresse Falten im Gut so eingedrückt, daß sie bei späterer Behandlung nicht mehr ganz entfernbar sind.In a further known wilting press, rigid pressure rollers and counter-pressure rollers are used, the counter-pressure rollers being pressed against the pressure roller by means of compression springs or pneumatic pressure pads. The conveyor belts are designed as felt belts and absorb the squeezed liquid. This known continuous wilting press is very expensive to maintain because the felt belts have to be replaced after an operating time of about 6 to 8 months because of their deformation, since they can no longer absorb the squeezed-out liquid to a sufficient extent. In addition, with this continuous wilting press, folds are pressed into the material in such a way that they cannot be completely removed during subsequent treatment.

Schließlich ist eine Walzenpresse bekannt (DE-B-10 30 184), die in erster Linie zum Abpressen von Flüssigkeit aus feuchten Massen, z.B. Obstmaischen, geeignet ist, aber auch zum Entwässern von Leder dienen kann. Sie weist eine große Druckwalze mit elastischem Mantel und eine Vielzahl von kleinen Gegendruckwalzen auf, die dicht an dicht über den Umfang der Druckwalze verteilt sind. Durch den Walzenspalt laufen zwei durch Reibungsschluß mitgenommene Förderbänder, zwischen die das auszupressende Gut aufgegeben und von denen es durch den Walzenspalt transportiert wird. Das äußere Förderband ist durchlässig, so daß die abgepreßte Flüssigkeit nach außen ablaufen kann.Finally, a roller press is known (DE-B-10 30 184), which is primarily used for pressing liquid from moist masses, e.g. Fruit mashing is suitable, but can also serve to drain leather. It has a large pressure roller with an elastic jacket and a large number of small counter-pressure rollers which are distributed close to one another over the circumference of the pressure roller. Two conveyor belts, which are entrained by friction, run through the nip, between which the material to be pressed is fed and from which it is transported through the nip. The outer conveyor belt is permeable, so that the squeezed liquid can run off to the outside.

Die Druckwalze mit ihrem elastischen Mantel soll entweder unter Atmosphärendruck stehen oder mit einem Druckmittel gefüllt sein. Hierbei ist offensichtlich an nur relativ geringe Drücke gedacht, da der Mantel der Druckwalze durch jede einzelne Gegendruck- bzw. Stützwalze stark nach innen verformt wird. Eine solche Anordnung ist für das Abwelken von Leder ungeeignet, da aufgrund der wellenförmigen Verformungen der Druckwalze eine durch den Walzenspalt laufende Haut ständig wechselnden Zug- und Schubkräften ausgesetzt wäre, die zwangsläufig zur Faltenbildung führen. Hinzu kommt, daß für das Abwelken von Leder und Pelzen sehr hohe Drücke erforderlich sind, da nur ein Teil des Wassers als Oberflächenwasser vorliegt, ein sehr großer Teil aber kapillargebunden ist. Dieses kapillar gebundene Wasser kann wegen des dichten Gefüges der Haut nur unter Anwendung hoher Drücke ausgetrieben werden, die zudem angesichts der Größe einer Haut und ihrer ungleichmäßigen Dicke über eine große Fläche bei wechselnder Größe des Walzenspaltes aufgebracht werden müssen. Solche Drücke lassen sich mit der bekannten Anordnung aufgrund der starken Walkkräfte, denen der elastische Mantel ausgesetzt ist, nicht beherrschen.The pressure roller with its elastic jacket should either be under atmospheric pressure or be filled with a pressure medium. Obviously, only relatively low pressures are considered here, since the jacket of the pressure roller is strongly deformed inwards by each individual counter-pressure or support roller. Such an arrangement is unsuitable for wilting leather, since due to the wave-like deformations of the pressure roller, a skin running through the nip would be exposed to constantly changing tensile and thrust forces, which inevitably lead to the formation of wrinkles. In addition, very high pressures are required for wilting leather and furs, since only part of the water is available as surface water, but a very large part is capillary-bound. Because of the dense structure of the skin, this capillary-bound water can only be expelled using high pressures, which, given the size of the skin and its uneven thickness, must also be applied over a large area with a changing size of the nip. Such pressures cannot be controlled with the known arrangement due to the strong flexing forces to which the elastic jacket is exposed.

Ähnliches gilt für bekannte Wringmaschinen (US-A- 3 798 933), bei denen das Textilgut zwischen Schlauchwalzen, die unter Überdruck stehen, hindurchbewegt wird, und zusätzlich Stützwalzen vorgesehen sind. Da hier aber keine Zentrierung durch Förderbänder erfolgt, können sich die Schlauchwalzen in den Zwischenräumen zwischen den Stützwalzen einseitig verformen und ausbeulen mit der Folge, daß an den gewünschten Stellen kein ausreichender Druck mehr vorhanden ist. Solche Schlauchwalzen lassen sich allenfalls bei sehr kleinen Baugrößen verwenden, die für die Bearbeitung von Leder nicht in Frage kommen. Auch ist ein faltenloser Einlauf des Gutes dann nicht gewährleistet, wenn es durch mehrere Preßzonen geführt wird. Schließlich werden erhebliche Luftmengen benötigt, um den gesamten Hohlraum der Schlauchwalze auf den erforderlichen pneumatischen Druck zu bringen.The same applies to known wringing machines (US-A-3 798 933), in which the textile material is moved through between hose rollers which are under excess pressure and additional support rollers are provided. However, since there is no centering by means of conveyor belts, the hose rollers can deform and bulge on one side in the gaps between the support rollers, with the result that there is insufficient at the desired locations There is more pressure. Such hose rollers can only be used in very small sizes that are out of the question for the processing of leather. Also, a wrinkle-free entry of the goods is not guaranteed if it is passed through several press zones. Finally, considerable amounts of air are required to bring the entire hollow space of the hose roll to the required pneumatic pressure.

Ausgehend von diesem Stand der Technik liegt de Erfindung die Aufgabe zugrunde, die Abwelkpresse so auszubilden, daß die insbesondere für das Abpressen des Kapillarwassers erforderlichen Drücke bei gleichwohl schonender Behandlung der Haut aufgebracht werden können.Proceeding from this prior art, the invention is based on the object of designing the wilting press in such a way that the pressures required in particular for pressing off the capillary water can be applied with a gentle treatment of the skin.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß

  • a) die Druckwalze in an sich bekannter Weise von einem elastischen Schlauch umgeben ist, der mit der Druckwalze ein Druckkissen bildet,
  • b) vier Gegendruckwalzen vorgesehen sind, von denen je zwei in einer horizontalen und zwei in einer vertikalen Ebene angeordnet sind und von denen
  • c) nur die in Förderrichtung letzte Gegendruckwalze angetrieben ist.
This object is achieved in that
  • a) the pressure roller is surrounded in a manner known per se by an elastic hose which forms a pressure cushion with the pressure roller,
  • b) four counter-pressure rollers are provided, two of which are arranged in a horizontal and two in a vertical plane and of which
  • c) only the last counter-pressure roller is driven in the conveying direction.

Durch Anwendung des an sich bekannten Merkmals a) (FR-A-453 093), d.h. die Ausbildung eines Druckkissens zwischen einer starrwandigen Druckwalze und einem diese umgebenden Schlauch lassen auch sehr hohe Drücke aufbringen bzw. aufnehmen.By applying the known feature a) (FR-A-453 093), i.e. the formation of a pressure pad between a rigid-walled pressure roller and a hose surrounding it can also apply or absorb very high pressures.

Durch die Anordnung von vier Gegendruckwalzen ist gewährleistet, daß der Schlauch symmetrisch abgestützt ist. Die Zentrierung des Schlauchs auch zwischen den Gegendruckwalzen wird dadurch erreicht, daß er auf dem größten Teil seins Umfangs von den Förderbändern umschlungen ist, die - da sie nicht aus elastischem Material bestehen müssen - in radialer Rich tung nicht nachgeben. Außerdem bauen sich zwischen den einzelnen Gegendruckwalzen Nachpreßzonen aus, indem die Förderbänder und so mit das zwischen ihnen liegende Gut im gespannten Zustand über die Druckwalze laufen. Das Gut braucht auch nur einmal am Einlauf glattgestrichen werden und behält dann diese Lage bei.The arrangement of four counter-pressure rollers ensures that the hose is supported symmetrically. The centering of the hose between the counter-pressure rollers is achieved in that it is wrapped on the majority of its circumference by the conveyor belts, which - since they do not have to be made of elastic material - do not yield in the radial direction. In addition, retrofit zones are built up between the individual counter-pressure rollers by the conveyor belts and the goods lying between them running in tensioned condition over the pressure roller. The goods need only be smoothed once at the inlet and then maintains this position.

Durch den Antrieb nur der in Förderrichtung letzten Gegendruckwalze ist gewährleistet, daß die Förderbänder durch die Preßzone nur gezogen werden, so daß zugleich auch die Haut nur Zugkräften und insbesondere keinen zür Faltenbildung führenden Schubkräften ausgesetzt ist. Weiterhin ist gewährleistet, daß sich aufgrund der straffen Spannung zwischen den Förderbändern im Bereich zwischen den Gegendruckwalzen Preßtaschen ausbilden können, die bei gleichwohl noch relativ hohem Druck die Abführung des ausgepreßten Wassers erlauben. Die Druckwalze wird von dem gezogenen Förderband durch Reibungsschluß, der über den gesamten Umfang wirkt, mitgenommen, ohne daß auf den Schlauch nennenswerte Torsionskräfte zur Wirkung kommen, wie dies bei einem direkten Antrieb der Druckwalze der Fall wäre.By driving only the last counter-pressure roller in the conveying direction, it is ensured that the conveyor belts are only pulled through the pressing zone, so that at the same time the skin is only exposed to tensile forces and in particular no shear forces leading to wrinkling. Furthermore, it is ensured that, due to the tight tension between the conveyor belts, press pockets can form in the area between the counter-pressure rollers, which, at the same time, allow the squeezed-out water to be discharged at a relatively high pressure. The pressure roller is carried along by the drawn conveyor belt by frictional engagement, which acts over the entire circumference, without any significant torsional forces acting on the hose, as would be the case with a direct drive of the pressure roller.

In bevorzugter Ausführung ist der Einlauf für das zu entwässernde Gut über eine in der horizontalen Ebene angeordnete Gegendruckwalze und der Aus lauf nach Passieren der anderen Gegendruckwalzen an der oben liegenden Gegendruckwalze vorgesehen.In a preferred embodiment, the inlet for the material to be dewatered is provided via a counter-pressure roller arranged in the horizontal plane and the run is provided on the counter-pressure roller lying above after passing through the other counter-pressure rollers.

Die Ausbildung des Druckkissens an der Druckwalze wird nach einer Ausgestaltung so ausgeführt, daß die Druckwalze als Rohrabschnitt ausgebildet und mit Abstand von einem Schlauchabschnitt um schlossen ist, daß der Rohrabschnitt und der Schlauchabschnitt an den Stirnseiten luftdicht miteinander verbunden sind, und daß die zwischen dem Rohrabschnitt und dem Schlauchabschnitt gebildete Kammer mit Druckluft gefüllt ist. Dabei kann die Kammer dauernd unter Druck stehen oder mit der Inbetriebnahme unter Druck gesetzt und gehalten werden.The formation of the pressure pad on the pressure roller is carried out according to one embodiment so that the pressure roller is designed as a pipe section and is spaced from a hose section around that the pipe section and the hose section are airtightly connected to each other at the end faces, and that between the pipe section and the chamber formed in the tube section is filled with compressed air. The chamber can be under constant pressure or be pressurized and maintained during commissioning.

Zum Zuführen der Druckluft ist gemäß einer Ausführungsform vorgesehen, daß in den Rohrabschnitt eine Druckluftleitung hineingeführt ist, die in eine Bohrung in der Wand des Rohrabschnittes luftdicht eingeschweißt ist und in die Kammer zwischen dem Rohrabschnitt und dem Schlauchabschnitt einmündet. Es braucht also nur die Kammer und nicht die gesamte Walze mit Druckluft versorgt werden.For supplying the compressed air, according to one embodiment it is provided that a compressed air line is introduced into the pipe section, which is welded airtight into a bore in the wall of the pipe section and opens into the chamber between the pipe section and the hose section. It is therefore only necessary to supply the chamber and not the entire roller with compressed air.

Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläuteret. Es zeigen:

  • Figur 1 einen schematischen Querschnitt der Abwelkpresse;
  • Figur 2 einen Teilschnitt im Bereich der Stirnseite der Druckwalze und
  • Figur 3 einen der Figur 2 ähnlichen Teilschnitt einer anderen Ausführungsform.
The invention is explained in more detail with reference to an embodiment shown in the drawings. Show it:
  • Figure 1 is a schematic cross section of the wilting press;
  • Figure 2 shows a partial section in the region of the end face of the pressure roller and
  • 3 shows a partial section similar to FIG. 2 of another embodiment.

Das Kernstück der neuen Abwelkpresse bildet die mit einem Druckpolster ausgerüstete Druckwalze 11, die aus einem Rohrabschnitt 10 und einem diesen umschließenden elastischen Schlauch 12 besteht. Zwischen der Außenfläche des Rohrabschnittes 10 und der Innenwandung des Schlauchabschnittes 12 wird eine luftdichte Kammer 13 gebildet. Der Innendurchmesser des Schlauchabschnittes 12 ist daher größer als der Außendurchmesser des Rohrabschnittes 10. Der Rohrabschnitt 10 und der Schlauchabschnitt 12 sind gleich lang und sind an beiden Stirnseiten luftdicht miteinander verbunden.The centerpiece of the new wilting press is the pressure roller 11, which is equipped with a pressure pad and consists of a tube section 10 and an elastic hose 12 surrounding it. An airtight chamber 13 is formed between the outer surface of the pipe section 10 and the inner wall of the hose section 12. The inside diameter of the hose section 12 is therefore larger than the outside diameter of the pipe section 10. The pipe section 10 and the hose section 12 are of the same length and are connected to one another in an airtight manner on both end faces.

Dazu ist auf der Außenseite des Rohrabschnittes 10 im Bereich der Stirnseite ein Abstandsring 30 aufgebracht, über den der elastische Schlauch 12 gestülpt ist, wie der Teilschnitt nach Figur 2 erkennen läßt. In einer den Schlauch 12 umschließenden Spanneinrichtung 34 sind Spannschrauben verstellbar, die einzelne Spannsegmente 32 gegen den Schlauch 12 und diesen wiederum gegen den Abstandsring 30 drücken. Die einander zugekehrten Flächen des Abstandsringes 30 und der Spannsegmente 32 sind mit aufeinander abgestimmten, vorzugsweise umlaufenden Profilierungen 31 und 33 versehen, die eine eindeutige Verklemmung des Schlauches 12 gewährleisten.For this purpose, a spacer ring 30 is applied to the outside of the tube section 10 in the region of the end face, over which the elastic hose 12 is placed, as can be seen in the partial section according to FIG. In a tensioning device 34 enclosing the tube 12, tensioning screws are adjustable which press individual tensioning segments 32 against the tube 12 and this in turn against the spacer ring 30. The mutually facing surfaces of the spacer ring 30 and the tensioning segments 32 are provided with coordinated, preferably circumferential profiles 31 and 33, which ensure a clear jamming of the hose 12.

Bei der Ausführungsform gemäß Figur 3 weisen die Spannsegmente 32, die z.B. teilringförmig ausgebildet sein können, eine Keilfläche 36 auf. Gegen diese wirkt eine entsprechende Keilfläche 37 einer Spanneinrichtung 34, die mittels koaxial verlaufender Schrauben angezogen wird.In the embodiment according to FIG. 3, the clamping segments 32, which e.g. can be partially annular, a wedge surface 36. A corresponding wedge surface 37 of a tensioning device 34 acts against this and is tightened by means of coaxial screws.

Die Stirnseiten der Rohrabschnitte 10 sind mittels Scheiben 27 verschlossen, an denen Stützring scheiben 35 angebracht sind, die die Stirnseiten des zwischen dem Abstandsring 30 und den Spannsegmenten 32 festgehlemunten elastischen Schlauches 12 abdecken. An einer Stirnseite ist durch die Lagerachse 28 der Druckwalze, die in dem Lager 29 drehbar gelagert ist, eine Druckluftleitung 25 hindurchgeführt. Die Druckluftleitung 25 ist in eine Bohrung 24 in der Wand des Rohrabschnittes 10 geführt und darin luftdicht verschweißt, so daß die Druckluftleitung 25 in die Kammer 13 zwischen dem Rohrabschnitt 10 und dem Schlauchabschnitt 12 einmündet. Die Druckluftleitung 25 ist daher drehfest mit dem Rohrabschnitt 10 und der Lagerachse 28 verbunden. Das aus der Lagerachse 28 herausragende Ende der Druckluftleitung 25 ist mit einer Drehkupplung 26 versehen, so daß ein ortsfester Druckluftanschluß angebracht werden kann.The end faces of the tube sections 10 are closed by means of washers 27, on which support ring washers 35 are attached, which cover the end faces of the elastic hose 12 which is clamped between the spacer ring 30 and the tensioning segments 32. On one end, a compressed air line 25 is passed through the bearing axis 28 of the pressure roller, which is rotatably mounted in the bearing 29. The compressed air line 25 is guided into a bore 24 in the wall of the pipe section 10 and welded therein in an airtight manner, so that the compressed air line 25 opens into the chamber 13 between the pipe section 10 and the hose section 12. The compressed air line 25 is therefore non-rotatably connected to the pipe section 10 and the bearing axis 28. The end of the compressed air line 25 protruding from the bearing axis 28 is provided with a rotary coupling 26 so that a stationary compressed air connection can be attached.

Die Kammer 13 wird dauernd oder nur während der Betriebszeit mit Druckluft von ca. 10 bis 25 atü gefüllt, so daß der elastische Schlauch 12 entsprechend auseinandergedrückt wird. Dieser Schlauch 12 ist vorzugsweise mit einer Gewebeeinlage versehen und wesit eine Wandstärke von 10 bis 20 mm auf, um diesem Druck standzuhalten.The chamber 13 is filled continuously or only during the operating time with compressed air of approx. 10 to 25 atm, so that the elastic hose 12 is pressed apart accordingly. This hose 12 is preferably provided with a fabric insert and has a wall thickness of 10 to 20 mm in order to withstand this pressure.

Wie Figur 1 zeigt, sind um die Druckwalze vier Gegendruckwalzen 14, 15, 16, und 17 angeordnet, von denen die Gegendruckwalzen 14 und 16 etwa in einer horizontalen Ebene und die Gegendruckwalzen 15 und 17 etwa in einer vertikalen Ebene angeordnet sind. Diese vier Gegendruckwalzen 14, 15, 16 und 17 bilden mit der Druckwalze 11 vier schmale Preßzonen, an denen sich der Schlauch 12 kaum ausdehnen kann.As shown in FIG. 1, four counter-pressure rollers 14, 15, 16 and 17 are arranged around the pressure roller, of which the counter-pressure rollers 14 and 16 are arranged approximately in a horizontal plane and the counter-pressure rollers 15 and 17 approximately in a vertical plane. These four counter-pressure rollers 14, 15, 16 and 17 form with the pressure roller 11 four narrow press zones, on which the hose 12 can hardly expand.

Zum Führen des Gutes sind die beiden Förderbänder 22 und 23 vorgesehen, von denen wenigstens das untere Förderband 22 perforiert und aus Kunststoff oder Stahl hergestellt ist. Das untere Förderband 22 bildet mit seiner Schleife von der Umlenkwalze 18 vor der Gegendruckwalze 14 eine Zubringereinrichtung für das zu entwässernde Gut. Das untere Förderband 22 umschließt den Schlauch 12, ist aber den Gegendruckwalzen 14, 15, 16 und 17 zugekehrt und durchläuft alle Preßzonen. In gleicher Weise ist auch das obere Förderband 23 geführt, ist jedoch dem Schlauch 12 zugekehrt, um die Druckwalze geführt. Über der Einlauf-Gegendruckwalze 14 ist die Umlenkwalze 20 für das obere Förderband 23 angeordnet, so daß das auf dem unteren Förderband zugeführte Gut zwischen den beiden, um die Umlenkwalze 20 und die Einlauf-Gegendruckwalze 14 geführten Förderbänder 22 und 23 eingezogen und nacheinander den Preßzonen der Gegendruckwalzen 14, 15, 16 und 17 zugeführt wird. Die Förderbänder 22 und 23 haben nur noch Führungsfunktion, und die ausgepreßte Flüssigkeit kann durch die Durchbrüche dieser Förderbänder abfließen. Der Entwässerungsvorgang wird durch den Druck der Druckluft in der Kammer 13 bestimmt. Da die Gegendruckwalzen 14, 15, 16 und 17 mit einem Gummiüberzug versehen sind und der elastische Schlauch 12 auch in den Preßzonen noch genügend Nachgiebigkeit besitzt, wird das Gut beim Durchlauf durch diese neue Abwelkpresse schonend behandlet und verläßt die Abwelkpresse mit einer sehr kleinen Restfeuchte. Da derSchlauch 12 zwischen den Preßzonen ausgebaucht und gegen die Förderbänder 22 und 23 gedrückt wird, erfolgt zwischen den Gegendruckwalzen 14 und 15, 15 und 16 sowie 16 und 17 jeweils noch ein Nachpreßvorgang. Die angetriebene Druckwalze nimmt durch Reibungsschluß die Förderbänder 22 und 23 in den eingezeichneten Pfeilrichtungen mit und auch die Gegendruckwalzen 14, 15, 16 und 17, sowie die Umlenkwalzen 18, 19, 20 und 21 werden zwangsläufig durch Reibungsschluß in den angegebenen Richtungen mitgedreht.The two conveyor belts 22 and 23 are provided for guiding the goods, at least the lower conveyor belt 22 being perforated and made of plastic or steel. The lower conveyor belt 22 forms with its loop from the deflecting roller 18 in front of the counter-pressure roller 14 a feed device for the material to be dewatered. The lower conveyor belt 22 encloses the hose 12, but faces the counter-pressure rollers 14, 15, 16 and 17 and passes through all the pressing zones. The upper conveyor belt 23 is also guided in the same way, but is turned towards the hose 12 and guided around the pressure roller. Above the inlet counter-pressure roller 14, the deflecting roller 20 for the upper conveyor belt 23 is arranged so that the material fed on the lower conveyor belt is drawn in between the two conveyor belts 22 and 23 guided around the deflecting roller 20 and the inlet counter-pressure roller 14 and successively the pressing zones the counter pressure rollers 14, 15, 16 and 17 is supplied. The conveyor belts 22 and 23 only have a guiding function, and the squeezed liquid can flow through the openings of these conveyor belts. The dewatering process is determined by the pressure of the compressed air in the chamber 13. Since the counter-pressure rollers 14, 15, 16 and 17 are provided with a rubber coating and the elastic hose 12 also has sufficient flexibility in the press zones, the material is treated gently when it passes through this new wilting press and leaves the wilting press with a very small residual moisture. Since the hose 12 is bulged between the pressing zones and pressed against the conveyor belts 22 and 23, a repressing operation is carried out between the counter-pressure rollers 14 and 15, 15 and 16 and 16 and 17. The driven pressure roller takes the conveyor belts 22 and 23 in the indicated arrow directions by friction and also the counter-pressure rollers 14, 15, 16 and 17, as well as the deflection rollers 18, 19, 20 and 21 are inevitably rotated by friction in the directions indicated.

Nach dem Passieren der Preßzone zwischen der oberen Auslauf-Gegendruckwalze 17 wird die Schleife des unteren Förderbandes 22 über die Umlenkwalze 19, die untere Gegendruckwalze 15 zur Einlauf-Umlenkwalze 18 geschlossen. Der Abschnitt des unteren Förderbandes 22 zwischen der Auslauf-Gegendruckwalze 17 und der Umlenkwalze 19 dient dabei als Abführeinrichtung für das entwässerte Gut. Das obere Förderband 23 wird um die Umlenkwalze 21 herumgeführt und die Schleife ist direkt sur Einlauf-Umlenkwalze 20 geschlossen.After passing the press zone between the upper outlet counter-pressure roller 17, the loop of the lower conveyor belt 22 is closed via the deflection roller 19, the lower counter-pressure roller 15 to the inlet deflection roller 18. The section of the lower conveyor belt 22 between the outlet counter-pressure roller 17 and the deflection roller 19 serves as a discharge device for the dewatered material. The upper conveyor belt 23 is guided around the deflecting roller 21 and the loop is closed directly by the inlet deflecting roller 20.

Beim gezeiten Ausführungsbeispiel ist die obere Gegendruckwalze 17 angetrieben und nimmt sowohl die Förderbänder als auch die Druckwalze und damit auch die übrigen Gegendruckwalzen 14, 15, 16 mit.In the tidal embodiment, the upper counter-pressure roller 17 is driven and takes both the conveyor belts and the pressure roller and thus also the other counter-pressure rollers 14, 15, 16 with them.

Damit die ausgepreßte Flüssigkeit besser abfließen kann, können die Gegendruckwalzen 14, 15, 16 und 17 auf ihren Außenflächen mit einem das Wasser vornehmlich zur Seite hin abführenden Profilierung versehen sein. Die ausgepreßte Flüssigkeit kann in einer Wanne leicht aufgefangen werden.So that the squeezed-out liquid can flow off better, the counter-pressure rollers 14, 15, 16 and 17 can be provided on their outer surfaces with a profiling which mainly removes water to the side. The squeezed liquid can easily be collected in a tub.

Um eine noch bessere Entwässerung zu erhalten bzw. noch mehr Preßzonen zu schaffen, können zwei Druckwalzen in Förderrichtung hintereinander angeordnet werden. In diesem Fall können zwei benachbarte Gegendruckwalzen zugleich mit beiden Druckwalzen zusammenarbeite, so daß nur sechs Gegendruckwalzen erforderlich sind, jedoch acht Preßzonen gebildet werden.In order to obtain even better dewatering or to create even more pressing zones, two pressure rollers can be arranged one behind the other in the conveying direction. In this case, two adjacent counter-pressure rollers can be used at the same time work together two pressure rollers, so that only six counter pressure rollers are required, but eight press zones are formed.

Claims (13)

1. Sammier press for leather and fur with a middle pressure roll with an elastically deformable cover and counterpressure rolls bearing thereon, whereof at least one of said rolls is driven, and with two conveyor belts that are moved by frictional engagement, said belts being operable to receive the material that is to be removed between them and draw it through pressure zones formed between the pressure roll and the counterpressure rolls, wherein at least the conveyor belt being disposed at the outer side in the region of the pressure roll comprises a water permeable material characterized in that:
a) the pressure roll (11) is surrounded in a known manner by an elastic hose (12) which together form a pressure cushion,
b) four counterpressure rolls (14, 15, 16, 17) are provided whereof two are disposed in a horizontal plane and two are disposed in a vertical plane, and whereof
c) only the last (17) of said counterpressure rolls, in the direction of travel, is driven.
2. Sammier press as in claim 1, characterized in that the intake for material from which water is to be removed is provided on a counterpressure roll (14) disposed in the horizontal plane, and the outlet is provided on the upper counterpressure roll (17) after passing the other counterpressure rolls (15, 16).
3. Sammier press according to claim 1 or 2, characterized in that the pressure roll is provided as a tube section (10) and is enclosed at a distance by the elastic hose (12), and in that the tube section (10) and the hose (12) are interconnected at their ends in an airtight manner, and in that the chamber (13) formed between the tube and the hose is filled with compressed air.
4. Sammier press as in claim 3, characterized in that a compressed air line (25) is introduced into the tube section (10), said line (25) being welded in an airtight manner in a bore (24) in a wall of the tube section and opening into the chamber (13) between the tube section and the elastic hose (12).
5. Sammier press as in claim 1, characterized in that the compressed air line (25) is connected with the tube section (10) and a bearing shaft (28) for said tube so as to be fixed in rotation, and in that the end of the compressed air line that is outside the bearing shaft (28) is provided with a rotary coupling (26) for a stationary hose connection or the like.
6. Sammier press as in one of the claims 1 to 5, characterized in that the tube section (10) is provided with a spacing ring (30) at its periphery, in the region of its ends, in that clamping part-ring segments (32) enclose the elastic hose (12) and are pressed against the hose by means of a clamping device (34) that engages them, and in that the said hose (12) is tensioned against the spacing ring (30).
7. Sammier press as in claim 6, characterized in that the spacing ring (30) and the clamping segments (32) have reliefs (31, 33) on their surfaces which face each other preferably directed in the peripheral direction of said surfaces.
8. Sammier press as in one of the claims 1 to 7, characterized in that the ends of the tube section (10) are closed by plates (27) and in that supporting ring plates (35) are placed on the said plates (27), the said ring plates (35) covering the ends of elastic hose (12) which is clamped between the spacing ring (30) and the clamping segments (32).
9. Sammier press according to one of the claims 1 to 8, characterized in that one conveyor belt (22) after passing the upper counterpressure roll (17) is taken over a deflector roll (19) disposed in a horizontal plane, then over a lower counterpressure roll disposed in a vertical plane and finally over another deflector roll (18) upstream of the intake, while the other conveyor belt (23) after leaving the upper counterpressure roll (17) is taken back over a deflector roll (21) positioned there above to a deflector roll (20) upstream of the intake.
10. Sammier press as in one of the claims 1 to 9, characterized in that the counterpressure rolls (14, 15, 16, 17) are provided with a rubber coating.
11. Sammier press as in claim 9, characterized in that the outer surfaces of the counterpressure rolls (14, 15, 16, 17) have reliefs leading the water off to the side.
12. Sammier press as in one of the claims 1 to 11, characterized in that the elastic hose (12) is provided with a fabric inlay and has a wall thickness of 10 to 20 mm.
13. Sammier press as in one of the claims 1 to 12, characterized in that a second pressure roll with counterpressure rolls is associated with the pressure roll and the counterpressure rolls, whereby two adjacent counterpressure rolls engages both pressure rolls with different zones of their respective peripheries
EP78101694A 1977-12-22 1978-12-15 De-watering press Expired EP0002739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2757257A DE2757257C3 (en) 1977-12-22 1977-12-22 Wilting press for leather, furs and the like.
DE2757257 1977-12-22

Publications (2)

Publication Number Publication Date
EP0002739A1 EP0002739A1 (en) 1979-07-11
EP0002739B1 true EP0002739B1 (en) 1981-10-14

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EP78101694A Expired EP0002739B1 (en) 1977-12-22 1978-12-15 De-watering press

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US (1) US4208892A (en)
EP (1) EP0002739B1 (en)
JP (1) JPS5498301A (en)
BR (1) BR7808401A (en)
CS (1) CS207747B2 (en)
DE (2) DE2757257C3 (en)
ES (1) ES476176A1 (en)
YU (1) YU301678A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095122A3 (en) * 1982-05-14 1984-09-19 Kurt Hacker Continuous process for heat and/or pressure treatment of soft, flexible flat materials, and apparatus for the application of the process
FI68656C (en) * 1984-01-25 1985-10-10 Leena Viljanmaa FOERFARANDE OCH ANORDNING FOER SPAENNING AV HUDAR
DE8606507U1 (en) * 1986-03-10 1986-04-30 Gebr. Bellmer GmbH + Co KG Maschinenfabrik, 75223 Niefern-Öschelbronn Roller for presses
DE3726757A1 (en) * 1987-08-12 1989-02-23 Moenus Turner Maschf CONTINUOUS PRINTING PRESS
US6854301B1 (en) * 2004-04-13 2005-02-15 Albany International Corp. Extended nip press for the leather industry
DK176518B1 (en) * 2006-01-24 2008-06-30 Dansk Mink Papir As Device for full or partial emptying / filling of a dryer unit with upright expansion tanks.

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Publication number Priority date Publication date Assignee Title
GB118054A (en) * 1900-01-01
FR453093A (en) * 1912-01-17 1913-05-30 Gustav Adolf Schettler Improvements to machines for the treatment of hides and skins
BE525016A (en) * 1952-12-13 1900-01-01
US3040554A (en) * 1959-02-18 1962-06-26 Swift & Co Removing leather from leather press
US3525160A (en) * 1967-05-12 1970-08-25 Jiri Dokoupil Process and arrangement for drainage of wet leather and similar fibrous material
US3707749A (en) * 1970-10-12 1973-01-02 Gen Tire & Rubber Co Variable pressure bed roller
DE2052879A1 (en) * 1970-10-28 1972-05-04 Rotter, Erhard F , Dipl Ing , 4000 Dusseldorf Device for the dewatering of textile webs running through, if necessary in a process unit with padding processes
US3699621A (en) * 1970-12-16 1972-10-24 Ici Ltd Rollers
US3798933A (en) * 1972-05-03 1974-03-26 Arendt H Wringer
DE2249369C3 (en) * 1972-10-09 1979-01-18 Josef Dipl.-Ing. 6000 Frankfurt Busek Press for dewatering fabrics such as leather hides
DE2351307B2 (en) * 1973-10-12 1977-02-17 Strojosvit, N.P., Krnov (Tschechoslowakei) DEVICE FOR CONTINUOUS DEWATERING OF LEATHER OR LEATHER-LIKE MATERIAL
DE2615131A1 (en) * 1976-04-07 1977-10-27 Trockentechnik Gmbh DEVICE FOR MOISTURIZING AND CONDITIONING LEATHER AND SIMILAR MATERIALS

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DE2757257A1 (en) 1979-06-28
DE2757257C3 (en) 1981-11-12
CS207747B2 (en) 1981-08-31
BR7808401A (en) 1980-05-20
EP0002739A1 (en) 1979-07-11
ES476176A1 (en) 1979-05-16
DE2757257B2 (en) 1981-03-12
US4208892A (en) 1980-06-24
YU301678A (en) 1982-06-30
DE2861175D1 (en) 1981-12-24
JPS5498301A (en) 1979-08-03

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