EP0660770A1 - SUCTION DEVICE FOR AUTOMATIC CUTTING MACHINE AND CUTTING PROCESS ENHANCING DIPOSITIVE LEDIT. - Google Patents
SUCTION DEVICE FOR AUTOMATIC CUTTING MACHINE AND CUTTING PROCESS ENHANCING DIPOSITIVE LEDIT.Info
- Publication number
- EP0660770A1 EP0660770A1 EP93917859A EP93917859A EP0660770A1 EP 0660770 A1 EP0660770 A1 EP 0660770A1 EP 93917859 A EP93917859 A EP 93917859A EP 93917859 A EP93917859 A EP 93917859A EP 0660770 A1 EP0660770 A1 EP 0660770A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- turbine
- fan
- motor
- exhaust
- 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
Classifications
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- 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
- B26D7/01—Means for holding or positioning work
- B26D7/018—Holding the work by suction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2215/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B2215/006—Suction tables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
- B26F2210/12—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products of fabrics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/202—With product handling means
- Y10T83/2066—By fluid current
- Y10T83/207—By suction means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/748—With work immobilizer
Definitions
- the present invention relates to a suction device for an automatic cutting machine of a stack of sheet materials and to a cutting method using said device.
- Automatic cutting machines generally include a cutting table on which is placed a stack of sheet material (fabrics, skins, papers, ...) to be cut, a movable cutting tool above the stack and a device for suction generally associated with a waterproof film disposed on the stack, for holding the stack on said table.
- the suction device comprises a turbine provided with an air inlet circuit and an air exhaust circuit, driven by an electric motor equipped with a fan.
- this assembly produces a significant vacuum at the upper face of the cutting table whose value in steady state is constant. However, this value changes as a function of the leaks generated during the cutting phase of the stack of material, the depression decreasing with the increase in the level of leakage.
- some automatic cutting machines are equipped with a conveyor.
- This conveyor also serves as a cutting zone and is actuated in order to advance the material to be cut.
- the high vacuum exerted on the cutting table generates significant friction which, to be overcome, requires a motor for driving the cutting conveyor of high power.
- some machines are equipped with a system called "trap", generating a high leakage rate at the cutting table, which lowers the level of vacuum. The movement efforts of the conveyor are thus reduced, but this phase generates a very significant noise.
- the suction device including the turbine and its electric motor drive is usually enclosed in a soundproof box.
- the object of the present invention is to solve these technical problems satisfactorily.
- a suction device for maintaining a stack of sheet material on the cutting table of an automatic cutting machine comprising a turbine provided with a air intake circuit sucked in at the cutting zone to create a vacuum intended to hold the stack on the table and an air exhaust circuit, said turbine being driven by an electric motor equipped with a fan with an air outlet pipe, characterized in that the electric drive motor includes means for varying the speed of rotation to adjust the vacuum.
- said speed variation means consist of two separate electrical windings equipping the motor and thus producing two values of depression.
- said speed variation means comprise a frequency variator of the electric power supply to the motor making it possible to obtain different values of depression.
- the device comprises means for cooling the air exhaust cooperating with means for complementary cooling of the drive motor.
- said means for cooling the exhaust air are constituted by the junction of the air outlet duct of the engine fan with the air exhaust circuit of the turbine and said means additional cooling consist of an additional fan mounted on the air outlet duct of the fan of said motor.
- the junction between the air outlet pipe of the additional fan and the air exhaust circuit of the turbine has a curved internal flap to prevent air backflow.
- the device is enclosed in a soundproof box comprising an intake air intake opening, an exhaust air outlet opening and two outside air intake openings and the air opening expelled lead into one or more silencers in series.
- Another object of the invention is an automatic cutting process for a stack of sheet material placed on a cutting table using in particular a suction turbine provided with a suction air intake circuit and a air exhaust circuit, driven by an electric motor equipped with at least one fan to create a vacuum on said table, characterized in that the speed of rotation of the turbine drive motor is varied so to adjust the vacuum selectively between the cutting phases and the loading or transfer phases of the battery on the cutting table.
- the exhaust air from the turbine is cooled and the additional cooling of the electric motor by the fan by injecting the air coming from the motor into the exhaust circuit of the turbine.
- the air from the engine is injected into the exhaust circuit by a venturi effect and the injection is forced into the exhaust circuit by means of an additional fan.
- a low vacuum value is adopted for the loading or transfer phase and a high value for the cutting phase.
- the invention therefore makes it possible to use a high vacuum during cutting and a much lower vacuum during the advance of the stack and its loading on the table by reducing the noise level of the machine.
- This has the advantage of reducing the drive forces of the conveyor and therefore of being able to use a motor with lower electrical consumption.
- the turbine turning more slowly and the depression being more, weak the machine in operation is all the more silent and the electric consumption is also reduced.
- the additional cooling means of the electric drive motor of the turbine make it possible, when this motor is stopped, and therefore also its internal fan, to still ensure cooling.
- FIG. 1 shows a schematic view of the device of the invention during operation
- FIG. 2 shows a partial exterior view of the device of the invention.
- FIG. 3 shows a sectional view of the exhaust silencers of the device of the invention.
- the suction device shown in FIG. 1 is enclosed in a soundproof box C comprising an orifice 1 for the intake of air sucked in by a turbine 4 at the cutting table or the cutting conveyor A, an orifice 2 of air outlet expelled by said turbine 4 and two orifices 3.3 ′ for admission of the outside air arranged on opposite sides of the box C and associated with means of acoustic insulation 30.30 ′.
- the turbine 4 is provided with a suction air intake circuit 41 comprising a filter or a settling box 41a for cutting waste and an air exhaust circuit 40.
- the settling box is provided under the shape of a box in which the sucked air is introduced from the bottom and exits from the top.
- the air therefore flows through the decantation box from bottom to top, forming a vortex and the heavy dust falls to the bottom of the box by gravity.
- baffles which reduce the kinetic energy of the dust to promote gravity.
- the turbine 4 is driven by an electric motor 5 equipped with a fan 15 and means for varying the speed.
- the orifice 3 for admitting the outside air is connected to a pipe 31 opening out inside the box C to close to the motor drive shaft 5.
- the orifices 3.3 ′ make it possible to establish a circulation of fresh air inside the casing C.
- the means of variation of the speed of rotation of the drive motor must allow at least two vacuum values to be obtained. The highest value is used to hold and compress the fabric when cutting.
- the variation of the speed of rotation of the motor 5 of the turbine 4 is obtained according to a first embodiment using a drive motor 5. comprising two separate windings and thus producing, by means of the turbine 4, two values of depression . Each winding being selected by a control device provided with relay type contactors controlled by the digital control of the cutting machine as a function of the desired vacuum value.
- the means for varying the speed of rotation of the motor 5 comprise a variator of the frequency of the electrical supply of said motor 5.
- a variator By acting on the variator, variations of the flow rate of air sucked in by the turbine and therefore continuous variations of the vacuum within a range of values.
- the depression can be adjusted to determined values to improve the quality of the cut.
- the device of the invention comprises means for cooling the exhaust air which cooperate with means for cooling the engine 5.
- the means for cooling the exhaust air consist of the junction 45 of the duct 50 for the air outlet of the fan 15 with the circuit 40 for exhausting the air from the turbine.
- the complementary cooling means of the motor 5 consist of an additional fan 51 and placed on the duct 50 for the air outlet of the fan 15.
- the purpose of the complementary cooling means is to avoid thermal shocks to the drive motor 5 of the turbine 4 and to cool the air expelled in the pipe 40 by the turbine. This air can reach a temperature of 80 ° C, which can be a nuisance for operators if the air is expelled directly into the cutting workshop.
- the electric motor is subjected to thermal shocks because the entire suction device is enclosed in the soundproof box C.
- the fan 15 is responsible for cool its windings.
- the air circulates little in the suction box C and, when the motor 5 stops, its temperature can reach 120 # C, which risks damaging its electrical windings.
- the motor When in operation, the motor is cooled by means of the air drawn in by its fan 15 coming from outside the box C.
- the pipe 50 routes the recovered air to the outlet of the fan 15 of the electric motor 5 to the exhaust circuit 40 of the turbine 4.
- the additional fan 51 propels the air stirred by the fan 15 in the line 50 towards the junction 45 with the circuit 40.
- This additional fan also serves to cool the engine when it has just been stopped, which prevents it from impact. thermal.
- the air from the electric motor 5 has a temperature of about 40 ° C, it is mixed with the exhaust air of the turbine whose temperature is close to 80 ° C. After mixing, the temperature of the air evacuated by the suction device is around 50 * C instead of 80 * C.
- the turbine has a low flow rate which compensates for the leaks created by cutting the material and the waterproof film that holds it.
- the additional fan 51 has a flow Q2 greater than the flow Ql of the turbine 1. The two air flows are mixed correctly.
- the junction 45 is equipped at the intersection of the flows with a curved internal flap 45 a which makes it possible to channel the air flows towards the orifice 2 of outlet of the box C, and this whatever the flow rate of the turbine 4. Due to its curved shape, the scoop allows air from the turbine to pass while preventing it from discharging the air from the electric motor 5, thereby promoting the so-called “de venturi "because the air evacuated by the turbine 4 draws the air coming from the additional fan 51.
- the orifice 2 for the outlet of air expelled from the box C is directly connected to a first exhaust silencer 21 located horizontally in the cutting machine and invisible from the outside.
- This silencer 21 attenuates medium and high frequency sound waves, but also low frequency waves by creating a phase shift.
- a second silencer 22 called the chimney can be connected in series to one of the ends of the first silencer, depending on the side of the machine on which it is desired to position the exhaust chimney.
- This silencer 22 essentially attenuates medium and high frequency sound waves by using a sound absorbing material.
- the operation of the silencers 21, 22 is illustrated in FIG. 3.
- the air enters the first silencer 21 through an orifice located substantially in the middle of the length of the body of the silencer.
- the incoming air hits the bursting plate 20 separating the interior volume of the silencer 21 into two parts defining two distinct paths: a direct path FI to the second silencer 22 and an indirect path F2 oriented first towards the obstructed side of the silencer 21 and whose length is much greater than that of FI.
- the bursting sheet 20 therefore separates the expelled air into two distinct flows FI, F2, one of which travels a distance much longer than the other before being introduced into the muffler 22.
- the exhaust silencer 21 has the form of a tube, the internal longitudinal wall 21a of which is formed by a perforated sheet while the external longitudinal wall of the tube is a full sheet.
- a sound insulating material 12 is inserted between the two sheets.
- This material can be, for example, foam, rock wool or glass wool.
- Part of the sound waves of the air flows FI, F2 passes through the holes in the internal perforated sheet 21a and is trapped in the insulating material, which has the consequence of further attenuating the operating sound level of the device.
- the second muffler 22 forming the exhaust chimney is produced in the same way, but does not have a burst plate 20.
- This chimney can be fixed to one or the other of the lateral ends of the first muffler 21.
- the bursting sheet having a symmetrical shape and the air inlet of the first muffler 21 being located in the middle of its length, the principle of phase shifting of the sound waves remains the same.
- the other end of the muffler 21 is closed by a flange 21b possibly removable, the structure of which is the same as that of the longitudinal wall.
- the attachments of the side end flange 21b and the connection elbow 23 of the chimney to the silencer 21 are identical.
- these fasteners can be simply produced by holes through which pass bolts screwed into the ends of the silencer 21.
- the two silencers 21, 22 in series make it possible to obtain a drop in the sound level of approximately 20 dBa.
- the silencers 21, 22 can be connected directly to a pipe. exhaust air from the building in which the cutting machine is located.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
Abstract
Description
DISPOSITIF D'ASPIRATION POUR MACHINE DE COUPE SUCTION DEVICE FOR CUTTING MACHINE
AUTOMATIQUE ET PROCEDE DE DECOUPE METTANT ENAUTOMATIC AND CUTTING METHOD USING
OEUVRE LEDIT DISPOSITIFWORK BY SAID DEVICE
La présente invention concerne un dispositif d'aspiration pour une machine de coupe automatique d'une pile de matières en feuilles ainsi qu'un procédé de découpe utilisant ledit dispositif.The present invention relates to a suction device for an automatic cutting machine of a stack of sheet materials and to a cutting method using said device.
Les machines de coupe automatique comprennent généralement une table de découpe sur laquelle est posée une pile de matières en feuilles (tissus, peaux, papiers, ...) à découper, un outil de coupe mobile au-dessus de la pile et un dispositif d'aspiration généralement associé à un film étanche disposé sur la pile, pour le maintien de la pile sur ladite table.Automatic cutting machines generally include a cutting table on which is placed a stack of sheet material (fabrics, skins, papers, ...) to be cut, a movable cutting tool above the stack and a device for suction generally associated with a waterproof film disposed on the stack, for holding the stack on said table.
Le dispositif d'aspiration comprend une turbine pourvue d'un circuit d'entrée d'air et d'un circuit d'échappement d'air, entraînée par un moteur électrique équipé d'un ventilateur. Pour maintenir la pile de matériau en feuille, cet ensemble produit une dépression importante au niveau de la face supérieure de la table de coupe dont la valeur en régime stationnaire est constante. Cette valeur évolue toutefois en fonction des fuites générées lors de la phase de coupe de la pile de matière, la dépression diminuant avec l'augmentation du niveau de fuite.The suction device comprises a turbine provided with an air inlet circuit and an air exhaust circuit, driven by an electric motor equipped with a fan. To maintain the stack of sheet material, this assembly produces a significant vacuum at the upper face of the cutting table whose value in steady state is constant. However, this value changes as a function of the leaks generated during the cutting phase of the stack of material, the depression decreasing with the increase in the level of leakage.
Pour optimiser la production et faciliter le transfert de la pile, certaines machines de coupe automatique sont équipées d'un convoyeur. Ce convoyeur sert aussi de zone de coupe et est actionné afin de faire avancer la matière à découper. Lors de ces avances, la forte dépression exercée au niveau de la table de coupe génère des frottements importants qui pour être vaincus nécessitent un moteur d'entraînement du convoyeur de coupe de forte puissance. Pour diminuer ces efforts d'entraînement du convoyeur, certaines machines sont équipées d'un système appelé "trappe", générant un débit de fuite important au niveau de la table de coupe, ce qui fait baisser le niveau de dépression. Les efforts de déplacement du convoyeur sont ainsi réduits, mais cette phase génère un bruit très important. Quel que soit le type de machine de coupe automatique, le dispositif d'aspiration comprenant la turbine et son moteur électrique d'entraînement est en général enfermé dans un caisson insonorisé. L'air circulant mal dans ce caisson, le moteur électrique de forte puissance s'échauffe beaucoup ce qui peut à terme le détruire. Par ailleurs, les anciens dispositifs d'aspiration présentent l'inconvénient d'évacuer de l'air chaud dans l'atelier de coupe ce qui est gênant pour les opérateurs. De plus, les déchets de coupe sont aspirés dans la turbine, ce qui peut nuire à son fonctionnement.To optimize production and facilitate stack transfer, some automatic cutting machines are equipped with a conveyor. This conveyor also serves as a cutting zone and is actuated in order to advance the material to be cut. During these advances, the high vacuum exerted on the cutting table generates significant friction which, to be overcome, requires a motor for driving the cutting conveyor of high power. To reduce these drive forces on the conveyor, some machines are equipped with a system called "trap", generating a high leakage rate at the cutting table, which lowers the level of vacuum. The movement efforts of the conveyor are thus reduced, but this phase generates a very significant noise. Whatever the type of automatic cutting machine, the suction device including the turbine and its electric motor drive is usually enclosed in a soundproof box. The air circulating badly in this box, the high power electric motor heats up a lot which can eventually destroy it. Furthermore, the old suction devices have the drawback of evacuating hot air into the cutting workshop, which is inconvenient for operators. In addition, cutting waste is sucked into the turbine, which can affect its operation.
La présente invention a pour objet de résoudre ces problèmes techniques de manière satisfaisante. Ce but est atteint, conformément à l'invention, au moyen d'un dispositif d'aspiration pour le maintien d'une pile de matières en feuilles sur la table de découpe d'une machine de coupe automatique comprenant une turbine pourvue d'un circuit d'entrée d'air aspiré au niveau de la zone de coupe pour créer une dépression destiné à maintenir la pile sur la table et d'un circuit d'échappement d'air, ladite turbine étant entraînée par un moteur électrique équipé d'un ventilateur avec une conduite de sortie d'air, caractérisé en ce que le moteur électrique d'entraînement comporte des moyens de variation de la vitesse de rotation pour ajuster la dépression.The object of the present invention is to solve these technical problems satisfactorily. This object is achieved, according to the invention, by means of a suction device for maintaining a stack of sheet material on the cutting table of an automatic cutting machine comprising a turbine provided with a air intake circuit sucked in at the cutting zone to create a vacuum intended to hold the stack on the table and an air exhaust circuit, said turbine being driven by an electric motor equipped with a fan with an air outlet pipe, characterized in that the electric drive motor includes means for varying the speed of rotation to adjust the vacuum.
Selon un premier mode de réalisation, lesdits moyens de variation de la vitesse sont constitués par deux enroulements électriques distincts équipant le moteur et produisant ainsi deux valeurs de dépression.According to a first embodiment, said speed variation means consist of two separate electrical windings equipping the motor and thus producing two values of depression.
Selon un autre mode de réalisation, lesdits moyens de variation de la vitesse comprennent un variateur de fréquence de l'alimentation électrique du moteur permettant d'obtenir différentes valeurs de dépression.According to another embodiment, said speed variation means comprise a frequency variator of the electric power supply to the motor making it possible to obtain different values of depression.
Selon une caractéristique avantageuse, le dispositif comprend des moyens de refroidissement de l'échappement d'air coopérant avec des moyens de refroidissement complémentaires du moteur d'entraînement.According to an advantageous characteristic, the device comprises means for cooling the air exhaust cooperating with means for complementary cooling of the drive motor.
Selon un mode de réalisation particulier, lesdits moyens de refroidissement de l'air d'échappement sont constitués par la jonction de la conduite de sortie d'air du ventilateur du moteur avec le circuit d'échappement d'air de la turbine et lesdits moyens de refroidissement complémentaires sont constitués d'un ventilateur additionnel monté sur la conduite de sortie d'air du ventilateur dudit moteur. La jonction entre la conduite de sortie d'air du ventilateur additionnel et le circuit d'échappement d'air de la turbine comporte un volet interne courbe pour éviter les refoulements d'air.According to a particular embodiment, said means for cooling the exhaust air are constituted by the junction of the air outlet duct of the engine fan with the air exhaust circuit of the turbine and said means additional cooling consist of an additional fan mounted on the air outlet duct of the fan of said motor. The junction between the air outlet pipe of the additional fan and the air exhaust circuit of the turbine has a curved internal flap to prevent air backflow.
Selon une autre caractéristique, le dispositif est enfermé dans un caisson insonorisé comportant un orifice d'entrée d'air aspiré, un orifice de sortie d'air expulsé et deux orifices d'admission de l'air extérieur et l'orifice d'air expulsé débouchent dans un ou plusieurs silencieux en série.According to another characteristic, the device is enclosed in a soundproof box comprising an intake air intake opening, an exhaust air outlet opening and two outside air intake openings and the air opening expelled lead into one or more silencers in series.
Un autre objet de l'invention est un procédé de découpe automatique d'une pile de matières en feuilles placée sur une table de découpe utilisant notamment une turbine d'aspiration pourvue d'un circuit d'entrée d'air aspiré et d'un circuit d'échappement d'air, entraînée par un moteur électrique équipé d'au moins un ventilateur pour créer une dépression sur ladite table, caractérisé en ce qu'on fait varier la vitesse de rotation du moteur d'entraînement de la turbine de façon à régler la dépression de manière sélective entre les phases de découpe et les phases de chargement ou de transfert de la pile sur la table de découpe.Another object of the invention is an automatic cutting process for a stack of sheet material placed on a cutting table using in particular a suction turbine provided with a suction air intake circuit and a air exhaust circuit, driven by an electric motor equipped with at least one fan to create a vacuum on said table, characterized in that the speed of rotation of the turbine drive motor is varied so to adjust the vacuum selectively between the cutting phases and the loading or transfer phases of the battery on the cutting table.
Selon une caractéristique avantageuse du procédé, on effectue le refroidissement de l'air d'échappement de la turbine et le refroidissement complémentaire du moteur électrique par le ventilateur en injectant l'air provenant du moteur dans le circuit d'échappement de la turbine.According to an advantageous characteristic of the method, the exhaust air from the turbine is cooled and the additional cooling of the electric motor by the fan by injecting the air coming from the motor into the exhaust circuit of the turbine.
Selon une autre caractéristique du procédé, on réalise l'injection de l'air provenant du moteur dans le circuit d'échappement par effet venturi et on force l'injection dans le circuit d'échappement au moyen d'un ventilateur additionnel.According to another characteristic of the method, the air from the engine is injected into the exhaust circuit by a venturi effect and the injection is forced into the exhaust circuit by means of an additional fan.
Selon encore une autre caractéristique du procédé on adopte une faible valeur de dépression pour la phase de chargement ou de transfert et une valeur élevée pour la phase de découpe.According to yet another characteristic of the process, a low vacuum value is adopted for the loading or transfer phase and a high value for the cutting phase.
L'invention permet donc d'utiliser une forte dépression lors de la coupe et une dépression beaucoup plus faible lors de l'avance de la pile et de son chargement sur la table en diminuant le niveau sonore de la machine. Ceci a pour avantage de réduire les efforts d'entraînement du convoyeur et donc de pouvoir utiliser un moteur de plus faible consommation électrique. De plus, la turbine tournant moins vite et la dépression étant plus, faible, la machine en fonctionnement en est d'autant plus silencieuse et la consommation électrique s'en trouve également diminuée.The invention therefore makes it possible to use a high vacuum during cutting and a much lower vacuum during the advance of the stack and its loading on the table by reducing the noise level of the machine. This has the advantage of reducing the drive forces of the conveyor and therefore of being able to use a motor with lower electrical consumption. In addition, the turbine turning more slowly and the depression being more, weak, the machine in operation is all the more silent and the electric consumption is also reduced.
Les moyens de refroidissement complémentaires du moteur électrique d'entraînement de la turbine permettent lorsque ce moteur est arrêté, et donc son ventilateur interne également, d'assurer quand même le refroidissement.The additional cooling means of the electric drive motor of the turbine make it possible, when this motor is stopped, and therefore also its internal fan, to still ensure cooling.
D'autres caractéristiques et avantages de la présente invention apparaîtront mieux à la lecture de la description qui suit de plusieurs modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. La description se réfère aux figures annexées sur lesquelles :Other characteristics and advantages of the present invention will appear better on reading the following description of several embodiments of the invention given by way of nonlimiting examples. The description refers to the appended figures in which:
- la figure 1 représente une vue schématique du dispositif de l'invention en cours de fonctionnement ;- Figure 1 shows a schematic view of the device of the invention during operation;
- la figure 2 représente une vue extérieure partielle du dispositif de l'invention ; et- Figure 2 shows a partial exterior view of the device of the invention; and
- la figure 3 représente une vue en coupe des silencieux d'échappement du dispositif de l'invention.- Figure 3 shows a sectional view of the exhaust silencers of the device of the invention.
Le dispositif d'aspiration représenté sur la figure 1 est enfermé dans un caisson insonorisé C comportant un orifice 1 d'entrée d'air aspiré par une turbine 4 au niveau de la table de découpe ou du convoyeur de coupe A, un orifice 2 de sortie d'air expulsé par ladite turbine 4 et deux orifices 3,3' d'admission de l'air extérieur disposés sur des côtés opposés du caisson C et associés à des moyens d'isolation acoustique 30,30'. La turbine 4 est pourvue d'un circuit d'entrée d'air aspiré 41 comportant un filtre ou une boîte de décantation 41a des déchets de coupe et d'un circuit d'échappement d'air 40. La boîte de décantation se présente sous la forme d'un boîtier dans lequel l'air aspiré est introduit par le bas et ressort par le haut. L'air traverse donc la boîte de décantation de bas en haut en formant un tourbillon et les poussières lourdes retombent dans le bas de la boîte par gravité. Pour accentuer ce tourbillon, on peut ajouter des chicanes qui réduisent l'énergie cinétique des poussières pour favoriser la gravité. La turbine 4 est entraînée par un moteur électrique 5 équipé d'un ventilateur 15 et de moyens de variation de la vitesse. L'orifice 3 d'admission de l'air extérieur est raccordé à une conduite 31 débouchant à l'intérieur du caisson C à proximité de l'arbre d'entraînement du moteur 5. Les orifices 3,3' permettent d'établir une circulation d'air frais à l'intérieur du caisson C. Quel que soit le typ,1 de turbine choisi, les moyens de variation de la vitesse de rotation du moteur d'entraînement doivent au moins permettre d'obtenir deux valeurs de dépression. La valeur la plus élevée est utilisée pour maintenir et comprimer le tissu lors de la coupe. La valeur la plus faible est adoptée lors des déplacements du convoyeur de coupe, c'est-à-dire pendant le chargement ou les transferts. En effet, lors de ces déplacements la pile de matière doit être immobilisée, mais une trop forte valeur de dépression nécessite un moteur d'entraînement du convoyeur suffisamment puissant pour vaincre les divers frottements générés par la dépression entre le convoyeur et ses organes de guidage. Une valeur de dépression beaucoup plus faible que celle utilisée lors de la coupe est suffisante pour maintenir la pile de matière et elle permet d'utiliser un moteur d'entraînement du convoyeur moins puissant. La consommation électrique de la machine en est donc réduite, ainsi que l'usure des éléments de guidage du convoyeur qui sont soumis à moins d'efforts. Par ailleurs, la turbine tournant moins vite la consommation électrique du moteur d'entraînement de la turbine s'en trouve diminuée. De plus, la machine de coupe dans son ensemble devient moins bruyante. La variation de la vitesse de rotation du moteur 5 de la turbine 4 est obtenue selon un premier mode de réalisation en utilisant un moteur d'entraînement 5. comportant deux enroulements distincts et produisant ainsi par le biais de la turbine 4, deux valeurs de dépression. Chaque enroulement étant sélectionné par un dispositif de commande muni de contacteurs de type relais pilotés par la commande numérique de la machine de coupe en fonction de la valeur de dépression désirée.The suction device shown in FIG. 1 is enclosed in a soundproof box C comprising an orifice 1 for the intake of air sucked in by a turbine 4 at the cutting table or the cutting conveyor A, an orifice 2 of air outlet expelled by said turbine 4 and two orifices 3.3 ′ for admission of the outside air arranged on opposite sides of the box C and associated with means of acoustic insulation 30.30 ′. The turbine 4 is provided with a suction air intake circuit 41 comprising a filter or a settling box 41a for cutting waste and an air exhaust circuit 40. The settling box is provided under the shape of a box in which the sucked air is introduced from the bottom and exits from the top. The air therefore flows through the decantation box from bottom to top, forming a vortex and the heavy dust falls to the bottom of the box by gravity. To accentuate this vortex, we can add baffles which reduce the kinetic energy of the dust to promote gravity. The turbine 4 is driven by an electric motor 5 equipped with a fan 15 and means for varying the speed. The orifice 3 for admitting the outside air is connected to a pipe 31 opening out inside the box C to close to the motor drive shaft 5. The orifices 3.3 ′ make it possible to establish a circulation of fresh air inside the casing C. Whatever the type, 1 of turbine chosen, the means of variation of the speed of rotation of the drive motor must allow at least two vacuum values to be obtained. The highest value is used to hold and compress the fabric when cutting. The lowest value is adopted when moving the cutting conveyor, i.e. during loading or transfers. Indeed, during these movements the stack of material must be immobilized, but too high a vacuum value requires a drive motor of the conveyor sufficiently powerful to overcome the various frictions generated by the vacuum between the conveyor and its guide members. A vacuum value much lower than that used during cutting is sufficient to maintain the stack of material and it allows the use of a less powerful conveyor drive motor. The power consumption of the machine is therefore reduced, as is the wear of the guide elements of the conveyor which are subjected to less effort. In addition, the turbine turning slower the power consumption of the turbine drive motor is reduced. In addition, the cutting machine as a whole becomes less noisy. The variation of the speed of rotation of the motor 5 of the turbine 4 is obtained according to a first embodiment using a drive motor 5. comprising two separate windings and thus producing, by means of the turbine 4, two values of depression . Each winding being selected by a control device provided with relay type contactors controlled by the digital control of the cutting machine as a function of the desired vacuum value.
Selon un autre mode de réalisation, les moyens de variation de la vitesse de rotation du moteur 5 (mono vitesse) comprennent un variateur de la fréquence de l'alimentation électrique dudit moteur 5. En agissant sur le variateur, on obtient ainsi des variations du débit d'air aspiré par la turbine et donc des variations continues de la dépression dans une plage de valeurs. Dans ce dernier cas, on peut ajuster la dépression à des valeurs déterminées pour améliorer la qualité de la coupe. Le dispositif de l'invention comprend des moyens de refroidissement de l'air d'échappement qui coopèrent avec des moyens de refroidissement complémentaires du moteur 5.According to another embodiment, the means for varying the speed of rotation of the motor 5 (single speed) comprise a variator of the frequency of the electrical supply of said motor 5. By acting on the variator, variations of the flow rate of air sucked in by the turbine and therefore continuous variations of the vacuum within a range of values. In the latter case, the depression can be adjusted to determined values to improve the quality of the cut. The device of the invention comprises means for cooling the exhaust air which cooperate with means for cooling the engine 5.
Les moyens de refroidissement de l'air d"échappement sont constitués par la jonction 45 de la conduite 50 de sortie d'air du ventilateur 15 avec le circuit 40 d'échappement d'air de la turbine.The means for cooling the exhaust air consist of the junction 45 of the duct 50 for the air outlet of the fan 15 with the circuit 40 for exhausting the air from the turbine.
Les moyens de refroidissement complémentaires du moteur 5 sont constitués d'un ventilateur additionnel 51 et placé sur la conduite 50 de sortie d'air du ventilateur 15. Les moyens complémentaires de refroidissement ont pour objet d'éviter les chocs thermiques au moteur d'entraînement 5 de la turbine 4 et de refroidir l'air expulsé dans la conduite 40 par la turbine. Cet air peut atteindre une température de 80*C, ce qui peut représenter une nuisance pour les opérateurs si l'air est expulsé directement dans l'atelier de coupe. Le moteur électrique est soumis à des chocs thermiques car tout le dispositif d'aspiration est enfermé dans le caisson insonorisé C. Lorsque le moteur 5 de forte puissance est en fonctionnement, il n'y a pas de problème car le ventilateur 15 est chargé de refroidir ses enroulements. Cependant, l'air circule peu dans le caisson d'aspiration C et, lorsque le moteur 5 s'arrête, sa température peut atteindre 120#C, ce qui risque de détériorer ses enroulements électriques.The complementary cooling means of the motor 5 consist of an additional fan 51 and placed on the duct 50 for the air outlet of the fan 15. The purpose of the complementary cooling means is to avoid thermal shocks to the drive motor 5 of the turbine 4 and to cool the air expelled in the pipe 40 by the turbine. This air can reach a temperature of 80 ° C, which can be a nuisance for operators if the air is expelled directly into the cutting workshop. The electric motor is subjected to thermal shocks because the entire suction device is enclosed in the soundproof box C. When the high power motor 5 is in operation, there is no problem because the fan 15 is responsible for cool its windings. However, the air circulates little in the suction box C and, when the motor 5 stops, its temperature can reach 120 # C, which risks damaging its electrical windings.
Lorsqu'il est en fonctionnement, le moteur est refroidi au moyen de l'air aspiré par son ventilateur 15 en provenance de l'extérieur du caisson C. La conduite 50 achemine l'air récupéré à la sortie du ventilateur 15 du moteur électrique 5 vers le circuit d'échappement 40 de la turbine 4.When in operation, the motor is cooled by means of the air drawn in by its fan 15 coming from outside the box C. The pipe 50 routes the recovered air to the outlet of the fan 15 of the electric motor 5 to the exhaust circuit 40 of the turbine 4.
Le ventilateur additionnel 51 propulse l'air brassé par le ventilateur 15 dans la conduite 50 vers la jonction 45 avec le circuit 40. Ce ventilateur additionnel sert également à refroidir le moteur lorsqu'il vient d'être arrêté, ce qui lui évite les chocs thermiques. L'air en provenance du moteur électrique 5 a une température d'environ 40*C, il est mélangé à l'air d'échappement de la turbine dont la température est voisine de 80'C. Après le mélange, la température de l'air évacué par le dispositif d'aspiration est d'environ 50*C au lieu de 80*C. En fonctionnement stabilisé, lorsque la dépression est établie, la turbine a un débit faible qui compense les fuites créées par la coupe de la matière et du film étanche qui la maintient. Durant cette phase de coupe, le ventilateur additionnel 51 a un débit Q2 supérieur au débit Ql de la turbine 1. Le mélange des deux flux d'air s'effectue correctement. Lorsque la turbine 4 est utilisée sans que la zone de coupe soit recouverte, elle a un débit très supérieur à celui du ventilateur additionnel 51 car la dépression ne peut s'établir. Dans cette phase, l'air provenant de la turbine pourrait refouler l'air provenant des ventilateurs 15, 51 et le moteur électrique 5 en subirait les conséquences. Pour palier à cet inconvénient, la jonction 45 est équipée à l'intersection des flux d'un volet interne courbe 45 a qui permet de canaliser les flux d'air vers l'orifice 2 de sortie du caisson C, et ce quel que soit le débit de la turbine 4. En raison de sa forme courbée, l'écope laisse passer l'air en provenance de la turbine tout en l'empêchant de refouler l'air provenant du moteur électrique 5 en favorisant ainsi le phénomène dit "de venturi" car l'air évacué par la turbine 4 tire l'air provenant du ventilateur additionnel 51.The additional fan 51 propels the air stirred by the fan 15 in the line 50 towards the junction 45 with the circuit 40. This additional fan also serves to cool the engine when it has just been stopped, which prevents it from impact. thermal. The air from the electric motor 5 has a temperature of about 40 ° C, it is mixed with the exhaust air of the turbine whose temperature is close to 80 ° C. After mixing, the temperature of the air evacuated by the suction device is around 50 * C instead of 80 * C. In stabilized operation, when the vacuum is established, the turbine has a low flow rate which compensates for the leaks created by cutting the material and the waterproof film that holds it. During this cutting phase, the additional fan 51 has a flow Q2 greater than the flow Ql of the turbine 1. The two air flows are mixed correctly. When the turbine 4 is used without the cutting area being covered, it has a flow rate much higher than that of the additional fan 51 because the vacuum cannot be established. In this phase, the air coming from the turbine could discharge the air coming from the fans 15, 51 and the electric motor 5 would suffer the consequences. To overcome this drawback, the junction 45 is equipped at the intersection of the flows with a curved internal flap 45 a which makes it possible to channel the air flows towards the orifice 2 of outlet of the box C, and this whatever the flow rate of the turbine 4. Due to its curved shape, the scoop allows air from the turbine to pass while preventing it from discharging the air from the electric motor 5, thereby promoting the so-called "de venturi "because the air evacuated by the turbine 4 draws the air coming from the additional fan 51.
Comme représenté sur la figure 2, l'orifice 2 de sortie d'air expulsé du caisson C est relié directement à un premier silencieux 21 d'échappement situé horizontalement dans la machine de coupe et invisible de l'extérieur. Ce silencieux 21 atténue les ondes sonores moyenne et haute fréquence, mais également les ondes basse fréquence en créant un déphasage d'onde. Un second silencieux 22 appelé cheminée peut être raccordé en série à une des extrémités du premier silencieux, en fonction du côté de la machine sur lequel on souhaite positionner la cheminée d'échappement. Ce silencieux 22 atténue essentiellement les ondes sonores moyenne et haute fréquence par utilisation d'un matériau phoniquement absorbant.As shown in FIG. 2, the orifice 2 for the outlet of air expelled from the box C is directly connected to a first exhaust silencer 21 located horizontally in the cutting machine and invisible from the outside. This silencer 21 attenuates medium and high frequency sound waves, but also low frequency waves by creating a phase shift. A second silencer 22 called the chimney can be connected in series to one of the ends of the first silencer, depending on the side of the machine on which it is desired to position the exhaust chimney. This silencer 22 essentially attenuates medium and high frequency sound waves by using a sound absorbing material.
Le fonctionnement des silencieux 21, 22 est illustré par la figure 3. L'air rentre dans le premier silencieux 21 par un orifice situé sensiblement au milieu de la longueur du corps du silencieux. L'air entrant heurte la tôle d'éclatement 20 séparant le volume intérieur du silencieux 21 en deux parties définissant deux trajets distincts : un trajet direct FI vers le second silencieux 22 et un trajet indirect F2 orienté d'abord vers le côté obstrué du silencieux 21 et dont la longueur est très supérieure à celle de FI. La tôle d'éclatement 20 sépare donc l'air expulsé en deux flux distincts FI, F2 dont l'un parcours une distance beaucoup plus longue que l'autre avant d'être introduit dans le silencieux 22. Les sons se propageant sous forme d'onde et les deux flux d'air FI, F2 étant entrés en même temps dans le silencieux 21 mais en ressortant l'un après l'autre, il se crée donc grâce à la différence de distance parcourue, un déphasage entre la longueur d'onde de chaque flux d'air. Les deux ondes sonores n'étant plus en phase, les vibrations liées à l'un des flux sont atténuées par les vibrations de l'autre flux et le niveau sonore général du système est plus faible. La tôle d'éclatement 20 permet donc de diminuer le niveau sonore de la machine. Afin d'atténuer encore le bruit, le silencieux d'échappement 21 a la forme d'un tube dont la paroi longitudinale interne 21a est constituée par une tôle perforée tandis que la paroi longitudinale externe du tube est une tôle pleine. Un matériau isolant phonique 12 est inséré entre les deux tôles. Ce matériau peut être, par exemple, de la mousse, de la laine de roche ou de la laine de verre. Une partie des ondes sonores des flux d'air FI, F2 passe par les trous de la tôle perforée interne 21a et est piégée dans le matériau isolant, ce qui a pour conséquence d'atténuer encore le niveau sonore de fonctionnement du dispositif. Le second silencieux 22 formant la cheminée d'échappement est réalisé de la même manière, mais ne comporte pas de tôle d'éclatement 20. Cette cheminée peut être fixée à l'une ou à l'autre des extrémités latérales du premier silencieux 21. La tôle d'éclatement ayant une forme symétrique et l'entrée d'air du premier silencieux 21 étant située au milieu de sa longueur, le principe de déphasage des ondes sonores reste le même. Quelle que soit l'extrémité du premier silencieux 21 à laquelle la cheminée 22 est fixée, l'autre extrémité du silencieux 21 est obturée par un flasque 21b éventuellement amovible dont la structure est la même que celle de la paroi longitudinale. Afin d'être interchangeables facilement, les fixations du flasque 21b d'extrémité latérale et du coude de raccordement 23 de la cheminée au silencieux 21 sont identiques. Par exemple, ces fixations peuvent être simplement réalisées par des trous dans lesquels passent des boulons vissés dans les extrémités du silencieux 21. Les deux silencieux 21, 22 en série permettent d'obtenir une baisse du niveau sonore d'environ 20 dBa. Par ailleurs, les silencieux 21, 22 peuvent être reliés directement à une conduite d'évacuation de l'air hors du bâtiment dans lequel se trouve la machine de coupe. The operation of the silencers 21, 22 is illustrated in FIG. 3. The air enters the first silencer 21 through an orifice located substantially in the middle of the length of the body of the silencer. The incoming air hits the bursting plate 20 separating the interior volume of the silencer 21 into two parts defining two distinct paths: a direct path FI to the second silencer 22 and an indirect path F2 oriented first towards the obstructed side of the silencer 21 and whose length is much greater than that of FI. The bursting sheet 20 therefore separates the expelled air into two distinct flows FI, F2, one of which travels a distance much longer than the other before being introduced into the muffler 22. The sounds propagating in the form of a wave and the two air flows FI, F2 being entered at the same time in the muffler 21 but exiting the one after the other, it is therefore created by the difference in distance traveled, a phase shift between the wavelength of each air flow. As the two sound waves are no longer in phase, the vibrations linked to one of the flows are attenuated by the vibrations of the other flow and the general sound level of the system is lower. The burst plate 20 therefore makes it possible to reduce the noise level of the machine. In order to further reduce the noise, the exhaust silencer 21 has the form of a tube, the internal longitudinal wall 21a of which is formed by a perforated sheet while the external longitudinal wall of the tube is a full sheet. A sound insulating material 12 is inserted between the two sheets. This material can be, for example, foam, rock wool or glass wool. Part of the sound waves of the air flows FI, F2 passes through the holes in the internal perforated sheet 21a and is trapped in the insulating material, which has the consequence of further attenuating the operating sound level of the device. The second muffler 22 forming the exhaust chimney is produced in the same way, but does not have a burst plate 20. This chimney can be fixed to one or the other of the lateral ends of the first muffler 21. The bursting sheet having a symmetrical shape and the air inlet of the first muffler 21 being located in the middle of its length, the principle of phase shifting of the sound waves remains the same. Whatever the end of the first muffler 21 to which the chimney 22 is fixed, the other end of the muffler 21 is closed by a flange 21b possibly removable, the structure of which is the same as that of the longitudinal wall. In order to be easily interchangeable, the attachments of the side end flange 21b and the connection elbow 23 of the chimney to the silencer 21 are identical. For example, these fasteners can be simply produced by holes through which pass bolts screwed into the ends of the silencer 21. The two silencers 21, 22 in series make it possible to obtain a drop in the sound level of approximately 20 dBa. Furthermore, the silencers 21, 22 can be connected directly to a pipe. exhaust air from the building in which the cutting machine is located.
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9210455A FR2695057B1 (en) | 1992-09-01 | 1992-09-01 | Suction device for automatic cutting machine and cutting method using said device. |
| FR9210455 | 1992-09-01 | ||
| PCT/FR1993/000800 WO1994005470A1 (en) | 1992-09-01 | 1993-08-10 | Suction device for automatic cutting machine and cutting process using said device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0660770A1 true EP0660770A1 (en) | 1995-07-05 |
| EP0660770B1 EP0660770B1 (en) | 1996-07-24 |
Family
ID=9433129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93917859A Revoked EP0660770B1 (en) | 1992-09-01 | 1993-08-10 | Suction device for automatic cutting machine and cutting process using said device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5626066A (en) |
| EP (1) | EP0660770B1 (en) |
| DE (1) | DE69303823T2 (en) |
| ES (1) | ES2091023T3 (en) |
| FR (1) | FR2695057B1 (en) |
| WO (1) | WO1994005470A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5836224A (en) * | 1995-12-27 | 1998-11-17 | Gerber Garment Technology, Inc. | Method and apparatus for working on sheet material |
| US6021772A (en) * | 1997-03-21 | 2000-02-08 | Wacker Siltronic Gesellschaft Fur Halbleitermaterialien Ag | Bandsaw and process for cutting off slices from a workpiece |
| US6880670B2 (en) * | 2002-10-29 | 2005-04-19 | Beda Charles Dondi | Muffler for suction system exhaust air used with an automatic cutting machine |
| US20050034576A1 (en) * | 2003-08-11 | 2005-02-17 | Ray Theodore M. | Bun slicer |
| KR20050038710A (en) * | 2003-10-22 | 2005-04-29 | 삼성전자주식회사 | Blower and air conditioner with the same |
| DE102005061787A1 (en) * | 2005-12-23 | 2007-06-28 | Fette Gmbh | Device for generating a negative pressure in the sealed space of a tablet press and / or an insulator |
| US7284305B1 (en) | 2007-01-12 | 2007-10-23 | Milliken & Company | Apparatus and process for automatically cutting textile web with reduced wrinkling |
| ATE517705T1 (en) * | 2007-06-30 | 2011-08-15 | Trumpf Werkzeugmaschinen Gmbh | MACHINE TOOL AND METHOD FOR EXHAUSTING A PART OF A WORKPIECE |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE496610A (en) * | 1950-06-27 | |||
| US3598006A (en) * | 1970-02-02 | 1971-08-10 | Gerber Garment Technology Inc | Method for working on sheet material and other objects |
| ES8101972A1 (en) * | 1979-01-31 | 1980-12-16 | Gerber Garment Technology Inc | Apparatus and method for working on successive segments of sheet material |
| JP2834139B2 (en) * | 1988-05-11 | 1998-12-09 | 株式会社日立製作所 | Refrigeration equipment |
| US5103153A (en) * | 1988-11-02 | 1992-04-07 | North American Philips Corporation | Control equipment for multi-speed electric motors |
| US5062334A (en) * | 1990-05-21 | 1991-11-05 | Killilea Timothy R | Apparatus for cleaning cutting table support surface |
| US5141403A (en) * | 1990-12-07 | 1992-08-25 | Cornell Research Foundation, Inc. | Two-level vacuum system controller with adjustable speed drive |
| KR930005714B1 (en) * | 1991-06-25 | 1993-06-24 | 주식회사 금성사 | Suction force control method and apparatus of a vacuum cleaner |
| DE4231330C2 (en) * | 1991-09-18 | 2000-05-25 | Shima Seiki Mfg | Web trimmer |
| JP2979181B2 (en) * | 1991-09-18 | 1999-11-15 | 株式会社島精機製作所 | Cutting device |
| WO1994019134A1 (en) * | 1993-02-18 | 1994-09-01 | M-Pact Corporation | Cutting device and assembly |
-
1992
- 1992-09-01 FR FR9210455A patent/FR2695057B1/en not_active Expired - Fee Related
-
1993
- 1993-08-10 ES ES93917859T patent/ES2091023T3/en not_active Expired - Lifetime
- 1993-08-10 DE DE69303823T patent/DE69303823T2/en not_active Revoked
- 1993-08-10 EP EP93917859A patent/EP0660770B1/en not_active Revoked
- 1993-08-10 US US08/392,894 patent/US5626066A/en not_active Expired - Fee Related
- 1993-08-10 WO PCT/FR1993/000800 patent/WO1994005470A1/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9405470A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US5626066A (en) | 1997-05-06 |
| FR2695057A1 (en) | 1994-03-04 |
| ES2091023T3 (en) | 1996-10-16 |
| DE69303823T2 (en) | 1997-01-16 |
| WO1994005470A1 (en) | 1994-03-17 |
| FR2695057B1 (en) | 1994-11-18 |
| EP0660770B1 (en) | 1996-07-24 |
| DE69303823D1 (en) | 1996-08-29 |
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