EP0268833A1 - Support for cutting material - Google Patents
Support for cutting material Download PDFInfo
- Publication number
- EP0268833A1 EP0268833A1 EP87115490A EP87115490A EP0268833A1 EP 0268833 A1 EP0268833 A1 EP 0268833A1 EP 87115490 A EP87115490 A EP 87115490A EP 87115490 A EP87115490 A EP 87115490A EP 0268833 A1 EP0268833 A1 EP 0268833A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- cutting material
- kpa
- material support
- layer
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000005520 cutting process Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims abstract description 3
- 238000007906 compression Methods 0.000 claims abstract description 3
- 239000006260 foam Substances 0.000 claims description 18
- 239000012530 fluid Substances 0.000 abstract description 7
- 239000006261 foam material Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
- B26F3/008—Energy dissipating devices therefor, e.g. catchers; Supporting beds therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/20—Cutting beds
Definitions
- the invention relates to the cutting material support for the work table of a cutting device, in particular a high-pressure fluid jet cutting system.
- DE-OS 27 20 547 discloses a cutting material support which is composed of several layers of different materials, each with different properties, the top layer consisting of a self-repairing material.
- materials with a self-repairing effect polyisobutylene, bitumen, tar
- a protective layer must be provided to prevent the sensitive material to be clogged or contaminated, or a sandwich version is required, as in the US-PS 39 27 591 discloses, wherein the self-healing layer is held together by an upper layer and a lower layer.
- the US-PS 35 48 697 discloses the cutting material support for a mechanical cutting device, which consists of several juxtaposed blocks of plastic with a low bulk density, whereby the cutting knife used can penetrate the cutting material support.
- a mechanical cutting device which consists of several juxtaposed blocks of plastic with a low bulk density, whereby the cutting knife used can penetrate the cutting material support.
- Such a cutting material support cannot be used in a high-pressure fluid jet cutting system will.
- the requirements that are placed on a foam cutting surface for knife cutting systems are different from those that are expedient for water jet systems.
- a foam with a low bulk density is required for the relatively wide cutting knife, so that the only partially penetrating knife, the retroactive forces emanating from the foam base, are negligible.
- German patent application P 35 19 616 describes a generic cutting material support which is composed of two layers of different materials, each layer having a special task.
- the upper layer made of a rigid foam with a low bulk density of 25 to 45 kg / m3, avoids undesirable back-spray effects.
- the lower layer is formed by a closed-cell soft foam with a high bulk density of 60-150 kg / m3 and high elasticity, which further expands and diffusely distributes the fluid jet, which is no longer completely coherent.
- the material used here rigid polystyrene foam and polyolefins or uncrosslinked polyethylene foam, has the disadvantage that several layers must be used, whose total thickness is always greater than 50 cm, so that the lower part of the foam layer is exposed to the divergent portion of the water jet, ie is cut in this area with a wider jet, which is extremely disadvantageous. This applies particularly to the cutting material underlay with a layer combination solution or multi-layer solution, as described in DE-OS 27 20 547.
- Multi-layer solutions cause the thickness of the material to be cut to increase.
- the geometry of a fluid jet which can never be coherent over its entire length, results in material wash-out when penetrating it, which increases the longer the jet path is covered, i.e. damage to the base will be greater on the underside than on the top.
- the invention has for its object to provide a cutting material underlay that is easily penetrable by a fluid jet, but is only slightly destroyed and thus has a high level of stability, which prevents splashback effects in any form, has high sound absorption properties and with only the lowest possible Layer thickness comes out.
- An advantage of such a solution is that, in addition to avoiding the disadvantages mentioned, it is also possible to repair the parts which have been partially damaged after prolonged loading.
- the locally damaged areas can be replaced individually after an area around the destroyed area has been cut out with a water jet.
- the small layer thickness proves to be an advantage because the fluid jet can cut through the layer completely.
- the material used combines the optimal compromise in the demand for a high bulk density, which affects the feasible layer thickness, the sound absorption capacity and the stability, and the demand for high elasticity, which also influences the factors mentioned above.
- the bulk densities of the residual material to be processed must be selected so that the end product has a bulk density of 150 to 400 kg / m3.
- a particularly advantageous cutting material underlay that meets all requirements is created if the individual parameters are set so that the composite foam has a bulk density of 250 kg / m2, a compression hardness of 100 kPa, a layer thickness of 40 to 50 mm , has a tensile strength of 350 kPa and an elongation at break of 70%.
- Cutting material supports were produced which had the following compositions and properties:
- the heterogeneous distribution of the flakes together with the high bulk density result in a cutting material underlay with good broadband sound absorption of the water jet noise.
- the base material can consist of foam residues, it is advisable to process remnants of cut material supports several times, which in addition to saving raw materials and energy also reduces the manufacturing costs.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Sawing (AREA)
- Details Of Cutting Devices (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Die Erfindung betrifft die Schneidgutunterlage für den Arbeitstisch einer Schneidvorrichtung insbesondere einer Höchstdruck-Fluidstrahlschneidanlage.The invention relates to the cutting material support for the work table of a cutting device, in particular a high-pressure fluid jet cutting system.
Die DE-OS 27 20 547 offenbart eine Schneidgutunterlage, die aus mehreren Schichten verschiedener Werkstoffe mit jeweils unterschiedlichen Eigenschaften zusammengesetzt ist, wobei die oberste Schicht aus einem sich selbst reparierenden Werkstoff besteht.
Werkstoffe mit selbstreparierender Wirkung (Polyisobutylen, Bitumen, Teer) haben jedoch die Eigenschaft einer klebrigen Oberfläche, so daß entweder zusätzlich eine Schutzschicht vorgesehen werden muß, die ein Festhaften bzw. Verschmutzen des empfindlichen Schneidguts verhindert oder eine Sandwich-Ausführung erforderlich ist, wie in der US-PS 39 27 591 offenbart, wobei die selbstheilende Schicht durch eine Oberschicht und eine Unterschicht zusammengehalten wird.DE-OS 27 20 547 discloses a cutting material support which is composed of several layers of different materials, each with different properties, the top layer consisting of a self-repairing material.
However, materials with a self-repairing effect (polyisobutylene, bitumen, tar) have the property of a sticky surface, so that either a protective layer must be provided to prevent the sensitive material to be clogged or contaminated, or a sandwich version is required, as in the US-PS 39 27 591 discloses, wherein the self-healing layer is held together by an upper layer and a lower layer.
Die US-PS 35 48 697 offenbart die Schneidgutunterlage für eine mechanische Schneidvorrichtung, die aus mehreren nebeneinander angeordneten Blöcken eines Kunststoffes mit niedriger Rohdichte besteht, wodurch das verwendete Schneidmesser in die Schneidgutunterlage eindringen kann. Bei einer Höchstdruck-Fluidstrahlschneidanlage kann eine derartige Schneidgutunterlage nicht eingesetzt werden. Grundsätzlich sind die Anforderungen, die an eine Schneidunterlage aus Schaumstoff für Messerschneidsysteme gestellt werden, verschieden von denen, die für Wasserstrahl-Systeme zweckmäßig sind. So ist für das relativ breite Schneidmesser ein Schaumstoff mit geringer Rohdichte erforderlich, so daß beim nur teilweise eindringenden Messer, die von der Schaumstoffunterlage ausgehenden rückwirkenden Kräfte, vernachlässigbar klein sind. Für den relativ schmalen Wasserstrahl dagegen ist ein Schaumstoff von hoher Rohdichte erforderlich, der für Messerschneidsysteme auch deshalb ungeeignet ist, weil das Messer dann häufiger geschliffen werden müßte, da die Reibungskräfte bei Schaumstoffen mit hohem Rohdichten größer sind als bei solchen mit geringen Rohdichten.The US-PS 35 48 697 discloses the cutting material support for a mechanical cutting device, which consists of several juxtaposed blocks of plastic with a low bulk density, whereby the cutting knife used can penetrate the cutting material support. Such a cutting material support cannot be used in a high-pressure fluid jet cutting system will. Basically, the requirements that are placed on a foam cutting surface for knife cutting systems are different from those that are expedient for water jet systems. A foam with a low bulk density is required for the relatively wide cutting knife, so that the only partially penetrating knife, the retroactive forces emanating from the foam base, are negligible. For the relatively narrow water jet, on the other hand, a foam with a high bulk density is required, which is also unsuitable for knife cutting systems because the knife would then have to be sharpened more often, since the frictional forces are greater for foams with high bulk densities than for those with low bulk densities.
In der deutschen Patentanmeldung P 35 19 616 ist eine gattungsgemäße Schneidgutunterlage beschrieben, die aus zwei Schichten unterschiedlicher Materialien aufgebaut ist, wobei jeder Schicht eine spezielle Aufgabe zukommt. Die obere Schicht, aus einem Hartschaum mit einer geringen Rohdichte von 25 bis 45 kg/m³, vermeidet unerwünschte Rückspritzeffekte. Die Unterschicht wird durch einen geschlossenzelligen Weichschaum mit hoher Rohdichte von 60-150 kg/m³ und hoher Elastizität gebildet, der den nicht mehr vollständig kohärenten Fluidstrahl weiter aufweitet und diffus verteilt.German patent application P 35 19 616 describes a generic cutting material support which is composed of two layers of different materials, each layer having a special task. The upper layer, made of a rigid foam with a low bulk density of 25 to 45 kg / m³, avoids undesirable back-spray effects. The lower layer is formed by a closed-cell soft foam with a high bulk density of 60-150 kg / m³ and high elasticity, which further expands and diffusely distributes the fluid jet, which is no longer completely coherent.
Das hier Verwendung findende Material, Polystyrolhartschaum und Polyolefine bzw. unvernetzter Polyäthylenschaum, hat den Nachteil, daß mehrere Schichten eingesetzt werden müssen, deren Gesamtdicke immer größer als 50 cm ist, so daß damit der untere Teil der Schaumstoffschicht dem divergenten Anteil des Wasserstrahls ausgesetzt ist, d. h. in diesem Bereich mit breiterem Strahl geschnitten wird, was außerordentlich nachteilig ist. Für die Schneidgutunterlage mit Schichtenkombinationslösung bzw. Mehrschichtenlösung, wie sie in der DE-OS 27 20 547 beschrieben ist, gilt dieses in besonderem Maße.The material used here, rigid polystyrene foam and polyolefins or uncrosslinked polyethylene foam, has the disadvantage that several layers must be used, whose total thickness is always greater than 50 cm, so that the lower part of the foam layer is exposed to the divergent portion of the water jet, ie is cut in this area with a wider jet, which is extremely disadvantageous. This applies particularly to the cutting material underlay with a layer combination solution or multi-layer solution, as described in DE-OS 27 20 547.
Mehrschichtenlösungen führen dazu, daß die Dicke der Schneidgutunterlage wächst.
Durch die Geometrie eines Fluidstrahls, der niemals über seine vollständige Länge kohärent sein kann, resultieren beim Durchdringen Materialauswaschungen, die umso größer werden, je länger der zurückgelegte Strahlweg wird, d. h. Beschädigungen der Unterlage werden an deren Unterseite größer sein als an der Oberseite.Multi-layer solutions cause the thickness of the material to be cut to increase.
The geometry of a fluid jet, which can never be coherent over its entire length, results in material wash-out when penetrating it, which increases the longer the jet path is covered, i.e. damage to the base will be greater on the underside than on the top.
Der Erfindung liegt die Aufgabe zugrunde eine Schneidgutunterlage zu schaffen, die von einem Fluidstrahl gut durchdringbar ist, dabei jedoch nur in geringer Weise zerstört wird und somit eine hohe Standfestigkeit besitzt, die Rückspritzeffekte in jeder Form verhindert, hohe Schallschluckeigenschaften aufweist und mit nur einer möglichst geringen Schichtdicke auskommt.The invention has for its object to provide a cutting material underlay that is easily penetrable by a fluid jet, but is only slightly destroyed and thus has a high level of stability, which prevents splashback effects in any form, has high sound absorption properties and with only the lowest possible Layer thickness comes out.
Die Lösung der Aufgabe is dem kennzeichnenden Teil des Hauptanspruchs entnehmbar, vorteilhafte Ausgestaltungen der Erfindung geben die Unteransprüche an.The solution to the problem can be found in the characterizing part of the main claim, advantageous embodiments of the invention specify the subclaims.
Vorteilhaft an einer derartigen Lösung stellt sich dar, daß neben der Vermeidung der genannten Nachteile zusätzlich eine einfache Reparaturmöglichkeit der nach längerer Belastung partiell beschädigten Stellen möglich ist. Die örtlich beschädigten Stellen können einzeln ausgetauscht werden, nachdem mittels Wasserstrahl ein Bereich um die zerstörte Stelle ausgeschnitten wird. Hierbei erweist sich die geringe Schichtdicke als Vorteil, weil der Fluidstrahl die Schicht vollständig durchschneiden kann.An advantage of such a solution is that, in addition to avoiding the disadvantages mentioned, it is also possible to repair the parts which have been partially damaged after prolonged loading. The locally damaged areas can be replaced individually after an area around the destroyed area has been cut out with a water jet. Here, the small layer thickness proves to be an advantage because the fluid jet can cut through the layer completely.
Nachfolgend soll die Erfindung näher beschrieben werden
Das verwendete Material vereinigt den optimalen Kompromiß bei der Forderung nach einer hohen Rohdichte, die die realisierbare Schichtdicke, das Schallschluckvermögen und die Standfestigkeit beeinflußt, und der Forderung nach einer hohen Elastizität, die die bereits genannten Faktoren ebenfalls beeinflußt.The invention will be described in more detail below
The material used combines the optimal compromise in the demand for a high bulk density, which affects the feasible layer thickness, the sound absorption capacity and the stability, and the demand for high elasticity, which also influences the factors mentioned above.
Bei Schaumstoffen, die hochelastisch sind, müssen zwei Grundtypen unterschieden werden und zwar die superelastischen Schaumstoffe (SEL) und high resilient-Schaumstoffe (HR), deren Zusammensetzung allgemein bekannt und in dem "Kunststoff-Handbuch 7, Polyurethane, Hanser Verlag 1983" beschrieben ist. Aus diesem Handbuch sind auch die Zusammensetzungen von superweichen Schaumstoffen entnehmbar, so daß das nachfolgend erwähnte Restmaterial Zusammensetzungen aufweist, die allgemeiner Stand der Technik sind.In the case of foams which are highly elastic, two basic types must be distinguished, namely the super-elastic foams (SEL) and high resilient foams (HR), the composition of which is generally known and is described in the "Kunststoff-Handbuch 7, Polyurethane, Hanser Verlag 1983" . The compositions of super-soft foams can also be found in this manual, so that the residual material mentioned below has compositions which are general prior art.
Die Rohdichten des aufzubereitenden Restematerials müssen dabei so ausgewählt werden, daß das Endprodukt eine Rohdichte von 150 bis 400 kg/m³ aufweist. In Versuchen wurde ermittelt, daß eine besonders vorteilhafte, alle Anforderungen optimal erfüllende Schneidgutunterlage geschaffen wird, wenn die einzelnen Parameter so eingestellt werden, daß der Verbundschaumstoff eine Rohdichte von 250 kg/m², eine Stauchhärte von 100 kPa, eine Schichtdicke von 40 bis 50 mm, eine Zugfestigkeit von 350 kPa und eine Bruchdehnung von 70 % aufweist.The bulk densities of the residual material to be processed must be selected so that the end product has a bulk density of 150 to 400 kg / m³. Experiments have shown that a particularly advantageous cutting material underlay that meets all requirements is created if the individual parameters are set so that the composite foam has a bulk density of 250 kg / m², a compression hardness of 100 kPa, a layer thickness of 40 to 50 mm , has a tensile strength of 350 kPa and an elongation at break of 70%.
Es wurden Schneidgutunterlagen hergestellt, die folgende Zusammensetzungen und Eigenschaften aufwiesen:
Die heterogene Verteilung der Flocken ergeben zusammen mit der hohen Rohdichte eine Schneidgutunterlage mit guter Breitbandschallabsorbierung der Wasserstrahlgeräusche.
Dadurch, daß das Grundmaterial aus Schaumstoffresten bestehen kann, bietet es sich an, Reste zerschnittener Schneidgutunterlagen mehrfach aufzuarbeiten, was neben einer Rohstoff- und Energieeinsparung zusätzlich die Herstellkosten senkt.Because the base material can consist of foam residues, it is advisable to process remnants of cut material supports several times, which in addition to saving raw materials and energy also reduces the manufacturing costs.
Durch die hohe innere Elastizität, hohe Strukturelastizität, hohe Rohdichte und Porosität sowie die im Schneidtisch vorzusehende Abstützung, auf die die Schneidunterlage aufgelegt wird, wird ein Herausfallen durchtrennter Konturen verhindert, welches eine wesentliche Voraussetzung für ein einwandfreies Schneiden mittels Wasserstrahl ist.Due to the high internal elasticity, high structural elasticity, high bulk density and porosity as well as the support to be provided in the cutting table on which the cutting base is placed, cut out contours are prevented from falling out, which is an essential prerequisite for perfect cutting with a water jet.
Claims (4)
- Rohdichte zwischen 150 und 400 kg/m³
- Stauchhärte kleiner als 260 kPa
- Zugfestigkeit größer als 100 kPa
- Bruchdehnung größer als 40 %
besteht.1. Cutting material support for the work table of a cutting device, characterized in that the cutting material support from a composite foam with a
- Density between 150 and 400 kg / m³
- Compression hardness less than 260 kPa
- tensile strength greater than 100 kPa
- elongation at break greater than 40%
consists.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87115490T ATE55719T1 (en) | 1986-11-27 | 1987-10-22 | SHEDS UNDERLAY. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3640619A DE3640619C1 (en) | 1986-11-27 | 1986-11-27 | Cutting material underlay |
| DE3640619 | 1986-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0268833A1 true EP0268833A1 (en) | 1988-06-01 |
| EP0268833B1 EP0268833B1 (en) | 1990-08-22 |
Family
ID=6314957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87115490A Expired - Lifetime EP0268833B1 (en) | 1986-11-27 | 1987-10-22 | Support for cutting material |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0268833B1 (en) |
| JP (1) | JPS63144998A (en) |
| AT (1) | ATE55719T1 (en) |
| DD (1) | DD265851A5 (en) |
| DE (1) | DE3640619C1 (en) |
| DK (1) | DK621387A (en) |
| ES (1) | ES2016959B3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427891A (en) * | 2012-05-15 | 2013-12-04 | 美国博通公司 | Geometrical closed loop line of sight (LOS) multiple-input-multiple-output (MIMO) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198618B (en) * | 2022-08-09 | 2024-09-20 | 王伟伟 | Highway noise reduction construction device and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2720547A1 (en) * | 1976-05-07 | 1977-11-24 | Shoe & Allied Trades Res Ass | Support for cutting shoe materials by jet - has layer of perforated impermeable material and permeable self sealing layer |
| DE2935828A1 (en) * | 1978-11-13 | 1980-05-14 | Gerber Garment Technology Inc | FLUIDJET CUTTING DEVICE WITH A SELF-HEALING BED |
| DE3519616C1 (en) * | 1985-05-31 | 1987-01-02 | Duerkopp System Technik Gmbh | Work table for cutting planar material by means of a fluid jet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3548697A (en) * | 1969-05-05 | 1970-12-22 | Gerber Garment Technology Inc | Apparatus for cutting sheet material |
| US3927591A (en) * | 1974-07-15 | 1975-12-23 | Gerber Garment Technology Inc | Support bed for sheet material cut by a fluid jet |
-
1986
- 1986-11-27 DE DE3640619A patent/DE3640619C1/en not_active Expired
-
1987
- 1987-10-16 JP JP62259863A patent/JPS63144998A/en active Pending
- 1987-10-22 ES ES87115490T patent/ES2016959B3/en not_active Expired - Lifetime
- 1987-10-22 AT AT87115490T patent/ATE55719T1/en not_active IP Right Cessation
- 1987-10-22 EP EP87115490A patent/EP0268833B1/en not_active Expired - Lifetime
- 1987-11-23 DD DD87309345A patent/DD265851A5/en not_active IP Right Cessation
- 1987-11-26 DK DK621387A patent/DK621387A/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2720547A1 (en) * | 1976-05-07 | 1977-11-24 | Shoe & Allied Trades Res Ass | Support for cutting shoe materials by jet - has layer of perforated impermeable material and permeable self sealing layer |
| DE2935828A1 (en) * | 1978-11-13 | 1980-05-14 | Gerber Garment Technology Inc | FLUIDJET CUTTING DEVICE WITH A SELF-HEALING BED |
| DE3519616C1 (en) * | 1985-05-31 | 1987-01-02 | Duerkopp System Technik Gmbh | Work table for cutting planar material by means of a fluid jet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427891A (en) * | 2012-05-15 | 2013-12-04 | 美国博通公司 | Geometrical closed loop line of sight (LOS) multiple-input-multiple-output (MIMO) |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE55719T1 (en) | 1990-09-15 |
| DK621387D0 (en) | 1987-11-26 |
| DE3640619C1 (en) | 1988-05-19 |
| EP0268833B1 (en) | 1990-08-22 |
| ES2016959B3 (en) | 1990-12-16 |
| DD265851A5 (en) | 1989-03-15 |
| DK621387A (en) | 1988-05-28 |
| JPS63144998A (en) | 1988-06-17 |
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