WO1997032045A2 - Rapidly replaceable membranes for vacuum stretching and cleaning machines for leather - Google Patents

Rapidly replaceable membranes for vacuum stretching and cleaning machines for leather Download PDF

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Publication number
WO1997032045A2
WO1997032045A2 PCT/DE1997/000341 DE9700341W WO9732045A2 WO 1997032045 A2 WO1997032045 A2 WO 1997032045A2 DE 9700341 W DE9700341 W DE 9700341W WO 9732045 A2 WO9732045 A2 WO 9732045A2
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
drying machines
machines according
net
vacuum stretching
Prior art date
Application number
PCT/DE1997/000341
Other languages
German (de)
French (fr)
Other versions
WO1997032045A3 (en
Inventor
Jiri Dokoupil
Original Assignee
Dokoupilova, Magda
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
Application filed by Dokoupilova, Magda filed Critical Dokoupilova, Magda
Publication of WO1997032045A2 publication Critical patent/WO1997032045A2/en
Publication of WO1997032045A3 publication Critical patent/WO1997032045A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/58—Drying

Definitions

  • Vacuum stretching and drying machines for leather (DP 3010003.9 and DP 3833068.7) work with the help of elastic rubber membranes. These membranes are subjected to enormous dynamic loads, so that after a certain time they tire and have to be replaced.
  • Cavities are provided in the lower part of the fitting, into which the upper part of a force-transmitting intermediate piece engages.
  • the power transmission can also be guaranteed directly without the intermediate piece) by engaging the power arm of the machine in the cavities of the valve. Since the fittings are replaced with the dynamically exhausted elastic plate (which is unusable) (one-way system), they are advantageously manufactured inexpensively from plastic in large quantities.
  • FIG. 1 A constructive example of an embodiment of the quickly exchangeable membrane according to this invention is shown in FIG. 1.
  • reference numerals 1-16 mean the following:
  • the power connection fittings 3 on the edge of the highly elastic rubber plate 1 are an integral part of the membrane. They are attached to the edge of the rubber sheet in the manufacturing plant as a complete membrane and are delivered to the operator of the machine.
  • the complete individual fittings are very flat (approx. 20-25mm), so that even in the number of pieces 80 on the edge of the rubber plate they do not cause any transport problems (the membranes are packed and delivered rolled up).
  • the individual armature consists of the upper part 4 and the lower part 5. They are non-positively connected through the openings 13 (in this case 5) by means of connecting elements 7 (in this case 5 screws with self-tapping threads).
  • the rubber plate is:. between the two Parts 4 and 5 preloaded (compressed).
  • the parts 4 and 5 on the surfaces that press on the rubber plate are equipped with the projections 8, the necessary adhesion to the rubber plate is achieved by the prestressing.
  • the lower part 5 there is a flat cavity 9, which is open on the front side.
  • the complete membrane, already equipped with 80 fittings, for example, is delivered to the machine operator. When installing this membrane, only the intermediate pieces 10 are then inserted into the power arms of the machine.
  • the intermediate pieces 10 are a unique component of the machine. This eliminates hours of monday work by the operators of the machine and ensures that the fittings are attached absolutely correctly, so that the membranes cannot fail due to incorrect assembly. »Even the downtimes of the expensive machines Changing the membranes is reduced to a minimum (hours only minutes).

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Cleaning In General (AREA)

Abstract

The invention relates to the rapid replacement of membranes (15) for vacuum stretching and cleaning machines. The force connection armatures (3), whose fitting at the premises of the machine operators is time consuming and technically demanding, constitute a fixed component of the elastic rubber membrane and are disposed of with the elastic rubber plate (one-way system). The armatures (force connections) comprise a top (4) and bottom part (5) which are connected by frictional engagement by the elastic plate. The bottom part (5) of the completely flat armature (3) is connected by a plug-in connection with a force-transmitting intermediate part (10) which is part of the machine.

Description

"Schnell austauschbare Membrane für Vakuumstreck- und Trocknungsmaschinen für Leder""Quickly replaceable membrane for vacuum stretching and drying machines for leather"
Vakuumstreck- und Trocknungsmaschinen für Leder (DP 3010003.9 und DP 3833068.7) arbeiten mit Hilfe von elastischen Gummimembranen. Diese Membranen werden enorm dynamisch belastet, sodaß sie nach gewisser Zeit ermüden und ausgetauscht werden müssen.Vacuum stretching and drying machines for leather (DP 3010003.9 and DP 3833068.7) work with the help of elastic rubber membranes. These membranes are subjected to enormous dynamic loads, so that after a certain time they tire and have to be replaced.
Das Austauschen der Membranen ist bei den Betreibern der Maschinen ein relativ anspruchsvoller Vorgang, da die Kraftanschlußarmaturen (bis zu 80 Stück pro Membrane) erst bei den Betreibern montiert werden können. Das nimmt mehrere Arbeitsstunden in Anspruch und bedarf Erfahrungen und großer Sorgfalt. Bei nicht fachgemäßer Montage erstehen später beim Arbeiten der Membrane Schäden, die sehr kostspielig sind.Replacing the membranes is a relatively demanding process for the operators of the machines, since the power connection fittings (up to 80 pieces per membrane) can only be installed by the operators. This takes several hours and requires experience and great care. If the diaphragm is not installed properly, damage will result later when the diaphragm is working, which is very expensive.
Diese Nachteile (Zeitverlust und nicht exakte Montage) beseitigt die schnell austauschbar3 Membrane nach dieser Erfindung, und das so, daß die einzelnen Kraftanschlu߬ armaturen auf dem Rand der elastischen Platte (z.B. hoch- elastiche Gummiplatte) ein fester Bestandteil der Membrane sind, sodaß sie mit der elastische.! Platte zusammen ausgetauscht werden (s.g. Einwegsvstem) . Die Armaturen bestehen aus einem oberen und einem unteren Teil, die zusammen kraftschlüssig durch Öffnungen in der elastischen Platte mittels Verbindungselementon verbunden sind. Die elastische Platte ist zwischen den beiden Teilen der Armatur in ihrer Dicke vorgespannt und Rillen, Kerben oder Vorsprünge an den Flächen der beiden Teile der Armatur erhöhen die Kraftübertragung. In dem unteren Teil der Armatur sind Hohlräume vorgesehen, in die der obere Teil eines kraftübertragenden Zwischenstückes eingreift. Die Kraftübertragung kann auch direkt Cohne Zwischenstück) mit Eingreifen des Kraftarmes der Maschine in die Hohlräume der Armatur gewährleistet sein. Da die Armaturen mit der dynamisch erschöpften elastischen Platte (die unbrauchbar ist) ausgetauscht werden (Einwegsystem), sind sie vorteilhaft preiswert aus Kunststoff in großer Stückzahl hergestel lt.These disadvantages (loss of time and inexact assembly) are eliminated by the quickly exchangeable3 membrane according to this invention, and in such a way that the individual power connection fittings on the edge of the elastic plate (for example highly elastic rubber plate) are an integral part of the membrane, so that they with the elastic.! Plate can be replaced together (so-called one-way system). The fittings consist of an upper and a lower part, which are connected non-positively through openings in the elastic plate by means of connecting elements. The thickness of the elastic plate is prestressed between the two parts of the fitting and grooves, notches or projections on the surfaces of the two parts of the fitting increase the transmission of force. Cavities are provided in the lower part of the fitting, into which the upper part of a force-transmitting intermediate piece engages. The power transmission can also be guaranteed directly without the intermediate piece) by engaging the power arm of the machine in the cavities of the valve. Since the fittings are replaced with the dynamically exhausted elastic plate (which is unusable) (one-way system), they are advantageously manufactured inexpensively from plastic in large quantities.
Ein konstruktives Beispiel einer Ausführung der schnell austauschbaren Membrane nach dieser Erfindung ist aufgeführt auf der Fig. 1. Hier bedeuten die Bezugszeichen 1-16 folgendes:A constructive example of an embodiment of the quickly exchangeable membrane according to this invention is shown in FIG. 1. Here, reference numerals 1-16 mean the following:
1) Elastische Platte1) Elastic plate
2) Rand der elastischen Platte2) Edge of the elastic plate
3) Armaturen3) fittings
4) oberer Teil der Armatur4) upper part of the fitting
5) unterer Teil der Armatur 6) Dicke der vorgespannten elastischen Platte5) lower part of the fitting 6) Thickness of the prestressed elastic plate
7) Verbindungselemente7) fasteners
8) Vorsprünge8) Tabs
9) Hohlräume (Halbhohlräume)9) cavities (semi-cavities)
10) Kraftübertragendes Zwischenstück10) Power transmission adapter
11) Kraftarm der Maschine11) Power arm of the machine
12) Dicke der elastischen Platte12) Thickness of the elastic plate
13) Öffnungen in der elastischen Platte13) Openings in the elastic plate
14) oberer Teil des Zwischenstückes 1014) upper part of the intermediate piece 10
15) Membrane15) membrane
16) Befestigungselement16) fastener
Die Kraftanschlußarmaturen 3 auf dem Rand der hochela¬ stischen Gummiplatte 1 sind ein fester Bestandteil der Membrane. Sie werden als komplette Membrane nicht trennbar auf den Rand der Gummiplatte im Herstellungswerk befestigt und zu dem Betreiber der Maschine geliefert. Die komplet¬ ten einzelnen Amaturen sind sehr flach (cca. 20-25mm) , so daß sie auch in der Stückzahl 80 auf dem Rand der Gummi¬ platte keine Transportprobleme verursachen (Die Membranen werden zusammengerollt verpackt und geliefert). Die einzelne Armatur besteht aus d<ϊm oberen Teil 4 und dem unteren Teil 5. Sie sind durch die Öffnungen 13 (in diesem Fall 5) kraftschlüssig mittels Verl.indungselementen 7 (in diesem Fall 5 Schrauben mit Selbεtüchneidegewinden) ver¬ bunden. Dabei ist die Gummiplatte :. zwischen den beiden Teilen 4 und 5 vorgespannt (zusammsngedrückt) . Da die Teile 4 und 5 auf den Flächen, die auf die Gummiplatte drücken, mit den Vorsprüngen 8 ausgestattet sind, wird durch die Vorspannung der nötige Kraftschluß zu der Gummiplatte erreicht. In dem unteren Teil 5 befindet sich ein flacher Hohlraum 9, der an der Stirnseite offen ist. So wird die komplette Membrane, schon bestückt mit den z.B. 80 Armaturen zum Betreiber der Maschine geliefert. Bei Einbau dieser Membrane werden dann nur die Zwischen¬ stücke 10 in die Kraftarme der Maschine gesteckt. Die Zwischenstücke 10 sind ein einmaliger Bestandteil der Maschine. So werden stundenlange Mi.ntagearbeiten bei den Betreibern der Maschine eliminiert und es wird sicherge¬ stellt, daß die Armaturen absolut rachgemäß befestigt sind, so daß keine Ausfälle der Membranen aus Gründen von falschen Montagen vorkommen können» Auch die Stillstand¬ zeiten der teuren Maschinen beim Wechseln der Membranen sind auf ein Minimum reduziert (stitt Stunden nur Minuten) . The power connection fittings 3 on the edge of the highly elastic rubber plate 1 are an integral part of the membrane. They are attached to the edge of the rubber sheet in the manufacturing plant as a complete membrane and are delivered to the operator of the machine. The complete individual fittings are very flat (approx. 20-25mm), so that even in the number of pieces 80 on the edge of the rubber plate they do not cause any transport problems (the membranes are packed and delivered rolled up). The individual armature consists of the upper part 4 and the lower part 5. They are non-positively connected through the openings 13 (in this case 5) by means of connecting elements 7 (in this case 5 screws with self-tapping threads). The rubber plate is:. between the two Parts 4 and 5 preloaded (compressed). Since the parts 4 and 5 on the surfaces that press on the rubber plate are equipped with the projections 8, the necessary adhesion to the rubber plate is achieved by the prestressing. In the lower part 5 there is a flat cavity 9, which is open on the front side. The complete membrane, already equipped with 80 fittings, for example, is delivered to the machine operator. When installing this membrane, only the intermediate pieces 10 are then inserted into the power arms of the machine. The intermediate pieces 10 are a unique component of the machine. This eliminates hours of monday work by the operators of the machine and ensures that the fittings are attached absolutely correctly, so that the membranes cannot fail due to incorrect assembly. »Even the downtimes of the expensive machines Changing the membranes is reduced to a minimum (hours only minutes).

Claims

Patentansprüche claims
1. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen dadurch gekennzeichnet, daß die Kraftan- schlußarmaturen (3) auf dem Rand (2) der elastischen Platte (1) ein fester Bestandteil der Membrane (15) sind, so daß sie mit der elastischen Platte (1) ausgetauscht werden (Einwegsystem) .1. Quickly replaceable membrane for vacuum stretching and drying machines characterized in that the power connection fittings (3) on the edge (2) of the elastic plate (1) are an integral part of the membrane (15), so that they with the elastic plate (1) can be replaced (one-way system).
2. Schnell austauschbare Membrane für Vakuumstreck- und Trocknungsmaschinen nach Anspruch 1, dadurch gekennzeichnet, daß die Armaturen (3) mindestens aus einem oberen Teil (4) und mindestens aus einem unteren Teil (5) bestehen, die zusammen kraftschlüssig verbunden sind.2. Quickly replaceable membrane for vacuum stretching and drying machines according to claim 1, characterized in that the fittings (3) consist of at least one upper part (4) and at least one lower part (5), which are connected together in a force-locking manner.
3. Schnell austauschbare Membrane _:Ur Vakuumstreck- und Trockenmaschinen nach Anspruch 1-2 , dadurch gekennzeich¬ net, daß der Kraftschluß zwischen dem oberen Teil (4) und dem unteren Teil (5) durch eins oder mehrere Öffnungen (13) der elastischen Platte (1) duichgeleitet wird. 3. Quickly replaceable membrane _: Ur vacuum stretching and drying machines according to claims 1-2, characterized gekennzeich¬ net that the frictional connection between the upper part (4) and the lower part (5) through one or more openings (13) of the elastic Plate (1) is directed.
4. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-3, dadurch gekennzeich¬ net, daß der Kraftschluß mittels Schrauben, Nieten, Kunststollschmelznieten oder anderen mechanischen Verbindungselementen (7) realisiert wird.4. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-3, characterized gekennzeich¬ net that the frictional connection is realized by means of screws, rivets, artificial rivets or other mechanical connecting elements (7).
5. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-4, dadurch gekennzeich¬ net, daß die elastische Platte (1) zwischen den oberen Teil (4) und den unteren Teil (5) der Armatur in seiner Dicke vorgespannt wird, von der Dicke (12) auf die Dicke (6).5. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-4, characterized gekennzeich¬ net that the elastic plate (1) between the upper part (4) and the lower part (5) of the valve is biased in its thickness, from thickness (12) to thickness (6).
6. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-5, dadurch gekennzeich¬ net, daß der obere Teil (4) und der untere Teil (5) der Armatur an den Flächen, die mit der elastischen Platte (1) in Kraftkontakt stehen, Rillen, Kerben oder Vorεprünge (8) angebracht sind.6. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-5, characterized gekennzeich¬ net that the upper part (4) and the lower part (5) of the fitting on the surfaces with the elastic plate (1) in Stand by force, grooves, notches or projections (8) are attached.
7. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-C, dadurch gekennzeich¬ net, daß in den unteren Teil (5) dar Armatur ein oder mehrere Hohlräume oder Halbhohlräune (9) gebildet sind, in die der obere Teil (14) des kraftübertragenden Zwischen- stückes (10) oder direkt ein Teil αes Kraftarmes (11) der Maschine eingreift. 7. Quickly replaceable membrane for vacuum stretching and drying machines according to claim 1-C, characterized gekennzeich¬ net that one or more cavities or semi-hollow spaces (9) are formed in the lower part (5) armature, in which the upper part (14th ) of the force-transmitting intermediate piece (10) or a part of the power arm (11) of the machine engages directly.
8. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-6, dadurch gekennzeich¬ net, daß der untere Teil (5) der Armatur direkt in den Kraftarm (11) der Maschine eingreift.8. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-6, characterized gekennzeich¬ net that the lower part (5) of the valve engages directly in the power arm (11) of the machine.
9. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-8, dadurch gekennzeich¬ net, daß die Armatur (3) vorwiegend aus Kunststoff (z.B. glasfaserverstärkes Polyamid) gebildet ist.9. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-8, characterized gekennzeich¬ net that the valve (3) is mainly made of plastic (e.g. glass fiber reinforced polyamide).
10. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-9, dadurch gekennzeich¬ net, daß mindestens eine Fläche c'es oberen (4) und unteren Teils (5) mit der elastischen Platte (19) dauerhaft verklebt ist.10. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-9, characterized gekennzeich¬ net that at least one surface c'es upper (4) and lower part (5) with the elastic plate (19) is permanently glued.
11. Schnell austauschbare Membrane für Vakuumstreck- und Trockenmaschinen nach Anspruch 1-10, dadurch gekennzeich¬ net, daß an der Außenseite des unteren Teils (5) der Armatur ein Befestigungselement (16) (z.B. Bügel oder Haken) angebracht iεt, zur Befestigung der luftdurchläs¬ sigen Abdeckung (Lycraeinlage) der oberen Membrane. 11. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-10, characterized gekennzeich¬ net that on the outside of the lower part (5) of the fitting a fastening element (16) (eg bracket or hook) iεt attached for fastening the breathable cover (Lycra insert) of the upper membrane.
12. Schnell austauschbare Membrane für Vakuumstreck- und Trocknungsmaschinen nach Anspruch 1 - 13 dadurch gekennzeichnet, daß die ganze Oberfläche der elastischen Platte (1) oder mindestens ein Teilbereich dieser Oberfläche (z.B. Streifen) so farbig gestaltet .st, daß sich ein Helligkeitsunterschied oder ein Farbunterschied zu der auf der Membrane sich befindlichen Lederoberfläche ergibt, so daß dieser Helligkeits- oder Farbunterschied an dem Lederrand so deutlich ist, daß er von einer opto¬ elektronischen Kammer im Hinblick auf eine Lederflächen¬ oder Lederlängenmessung registriert wird. 12. Quickly replaceable membrane for vacuum stretching and drying machines according to claims 1-13, characterized in that the entire surface of the elastic plate (1) or at least a portion of this surface (eg strips) designed so colored that a difference in brightness or a Color difference to the leather surface located on the membrane results, so that this difference in brightness or color at the leather edge is so clear that it is registered by an opto-electronic chamber with regard to a leather surface or leather length measurement.
PCT/DE1997/000341 1996-03-02 1997-02-26 Rapidly replaceable membranes for vacuum stretching and cleaning machines for leather WO1997032045A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19608094.0 1996-03-02
DE1996108094 DE19608094A1 (en) 1996-03-02 1996-03-02 Quickly replaceable membrane for vacuum stretching and drying machines for leather

Publications (2)

Publication Number Publication Date
WO1997032045A2 true WO1997032045A2 (en) 1997-09-04
WO1997032045A3 WO1997032045A3 (en) 1997-10-23

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PCT/DE1997/000341 WO1997032045A2 (en) 1996-03-02 1997-02-26 Rapidly replaceable membranes for vacuum stretching and cleaning machines for leather

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WO (1) WO1997032045A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19707076A1 (en) * 1997-02-23 1998-08-27 Bohumil Dipl Ing Stupecky The quick-change membrane for vacuum stretching and / or drying machines for the leather industry

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463429C (en) * 1928-07-27 Richard Cooke Fogg Stretched leather frame with gripper claws adjustable in longitudinal slots of a cross rail designed as a box-shaped hollow body
US2653410A (en) * 1949-02-09 1953-09-29 John W Durkee Leather stretching apparatus
FR1336089A (en) * 1962-02-12 1963-08-30 Method and apparatus for stretching and vacuum drying wrought or dyed undercuts and wet skins
DE3010003A1 (en) * 1980-03-15 1981-09-24 Jiri Dipl-Ing. 6251 Gückingen Dokoupil METHOD AND DEVICE FOR ENLARGING AND DRYING LEATHER PIECES, FURS AND THE LIKE. FLAT MATERIALS
DE3928095A1 (en) * 1989-08-25 1991-02-28 Dynavac Gmbh METHOD AND DEVICE FOR MACHINING SOFT-FLEXIBLE FLAT MATERIAL PIECES
US5258917A (en) * 1990-04-19 1993-11-02 Durkopp Systemtechnik Gmbh Method for nesting contours to be cut out of natural leather

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463429C (en) * 1928-07-27 Richard Cooke Fogg Stretched leather frame with gripper claws adjustable in longitudinal slots of a cross rail designed as a box-shaped hollow body
US2653410A (en) * 1949-02-09 1953-09-29 John W Durkee Leather stretching apparatus
FR1336089A (en) * 1962-02-12 1963-08-30 Method and apparatus for stretching and vacuum drying wrought or dyed undercuts and wet skins
DE3010003A1 (en) * 1980-03-15 1981-09-24 Jiri Dipl-Ing. 6251 Gückingen Dokoupil METHOD AND DEVICE FOR ENLARGING AND DRYING LEATHER PIECES, FURS AND THE LIKE. FLAT MATERIALS
DE3928095A1 (en) * 1989-08-25 1991-02-28 Dynavac Gmbh METHOD AND DEVICE FOR MACHINING SOFT-FLEXIBLE FLAT MATERIAL PIECES
US5258917A (en) * 1990-04-19 1993-11-02 Durkopp Systemtechnik Gmbh Method for nesting contours to be cut out of natural leather

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Publication number Publication date
WO1997032045A3 (en) 1997-10-23
DE19608094A1 (en) 1997-09-04

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