EP0267816B1 - Method and device for automatically introducing and positioning two corners of textile work pieces upon a sewing machine - Google Patents

Method and device for automatically introducing and positioning two corners of textile work pieces upon a sewing machine Download PDF

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Publication number
EP0267816B1
EP0267816B1 EP87402134A EP87402134A EP0267816B1 EP 0267816 B1 EP0267816 B1 EP 0267816B1 EP 87402134 A EP87402134 A EP 87402134A EP 87402134 A EP87402134 A EP 87402134A EP 0267816 B1 EP0267816 B1 EP 0267816B1
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EP
European Patent Office
Prior art keywords
piece
sewing
fabric
line
slide plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87402134A
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German (de)
French (fr)
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EP0267816A1 (en
Inventor
Michel Julien
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Institut Textile de France
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Institut Textile de France
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Publication date
Application filed by Institut Textile de France filed Critical Institut Textile de France
Priority to AT87402134T priority Critical patent/ATE66504T1/en
Publication of EP0267816A1 publication Critical patent/EP0267816A1/en
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Publication of EP0267816B1 publication Critical patent/EP0267816B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
    • D05B27/06—Work-feeding means with feed dogs having horizontal and vertical movements arranged above and below the workpieces
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/10—Edge guides
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices
    • D05D2207/04—Suction or blowing devices

Definitions

  • the present invention relates to the automatic introduction of textile pieces under the presser foot of a sewing machine, and more particularly the introduction of two superimposed pieces after adjustment of the two corresponding angles.
  • the invention relates to the field of making textile articles, but can more generally relate to all fields where it is necessary to superimpose exactly and assemble two flexible pieces.
  • first part (a) is first positioned precisely along the first stop along the side of the angle along which the seam is to be made, then along the reference line along the other side of the angle. The same positioning then occurs for the second part, then the two exactly superimposed parts are moved simultaneously and introduced under the presser foot of the sewing machine.
  • the method of the invention allows partially hidden time work, insofar as the operator prepares and introduces the second part while the positioning of the first part takes place according to steps a and b.
  • straight stop used above should be taken in a broad sense; it is a means along which the part finishes moving. It can actually be a stop in the usual sense of the term, that is to say a material means against which the side of the part will be forced to stop. But it can also be, according to the method of the invention, an intangible means, a reference line along which side of the room will position.
  • the pushing means will have the sole function of pushing the part in the direction of the stop; in the second case, the thrust means will have the additional function of stopping the part along the reference line constituting the stop.
  • the pushing means are pneumatic means which consist of nozzles, supplied with compressed air and inclined in the pushing direction of the part.
  • the device according to the invention comprises a third sliding plate, substantially parallel to the work plane, located above the second sliding plate, and the pushing means consist of orifices made in the first and said third sliding plate
  • the second and the third plate have on the side opposite the stop a slightly curved upward shape to facilitate the introduction of the part in the intervals between, on the one hand the first and second plates (first part) and on the other share the second and third plates (second piece).
  • the edge guide 1 consists of three overlapping plates 2, 3 and 4.
  • the lower plate 2 is placed in front of the needle plate 5 so that the upper faces of these two plates 2 and 5 are coplanar. It has several orifices 6, inclined by relative to the horizontal plane and opening into a housing 7 formed in the plate 2 itself, said housing 7 being closed by a plate 8 through which the compressed air inlet 9 is fixed.
  • the upper plate 4 also includes orifices 10 supplied with compressed air in the same way as the orifices 6. In both cases, these orifices 6 and 10 are oriented substantially in the direction of the arrow D.
  • the plates 2 and 4 are separated from the intermediate plate 3 by means wedges 11 and 12 which constitute the guide bottom stops. The inner parts of shims 11 and 12 forming stops are in the same vertical plane, parallel to the seam line 13 passing through the needle 14.
  • Each plate 2 and 4 is partially hollowed out according to a groove, respectively 15 and 16, in which a claw takes place, respectively 17 and 18.
  • This groove 15 or 16 allows the claw 17 or 18 to move in its horizontal movement in the direction of the seam line 13.
  • Each claw 17 or 18 is connected to a drive device allowing the claw to move vertically and horizontally. This drive device consists of the elements described below.
  • stirrups 22 and 23 are fixed on a plate 19, integral with the frame of the sewing machine 20 by means of a hinge with a vertical axis 21.
  • Each stirrup receives the elements corresponding to the movements of a claw
  • l lower caliper 2 2 receives the elements corresponding to the lower claw 17, the upper caliper 23 those of the upper claw 18.
  • the caliper 22 supports on the one hand the stepping motor 24 and on the other hand the axis of rotation 25.
  • a pulley 26 is fixed on the axis 25 and is connected to the pulley 27 of the motor 24 by means of the toothed belt 28.
  • a support part 29 is articulated around the axis 25; it comprises two guide pin holes 30 and 31 in which the pins 32 and 33 slide fixed on a mechanism 34.
  • This mechanism 34 comprises an arm 35, carrying at its end the support 37 of the claw 18, and a rack 38 which meshes with the pinion 39 locked on the axis 25.
  • the spring 41 and l with adjusting screws 40, fixed on the stirrup 23, make it possible to apply an adjustable pressure on the arm 35 by means of the part 42 which carries the roller 43, this roller 43 being embedded in the slide 36. This arrangement allows the movement of the arm 35 while maintaining the action of the spring 41.
  • the part lower 44 of the part 42 receives the end of the rod of the jack 45, fixed on the plate 19.
  • the edge guide 1 is fixed to the end of the plate 19. In this way the entire device is retractable by pivoting around the axis 21 to allow access to the organs of the sewing machine.
  • a locking screw not shown, allows the entire device to be fixed in position.
  • a photoelectric cell 46 is placed above the edge guide 1 and in front of the presser foot 47 of the sewing machine.
  • the working axis of the cell 46 is vertical and the plates 3 and 4 are drilled to allow the passage of the light flux.
  • the photocell 46 is connected to the stepping motor 24.
  • Two proximity detectors 47 and 48, placed under the mechanism 34, are also connected to the stepping motor 24.
  • the first textile piece 49 is introduced manually by the operator in an approximate position; it is pushed towards the stop line 50 in the direction of arrow D, transverse to the seam line 13 (fig 4a). Once the side 51, along which the sewing is to be carried out, positioned exactly along the stop line 50, the first part 49 is moved in the direction of the arrow D ⁇ (fig 4b) until the other side 52 of the angle has reached the reference line 53 (fig. 4c). During the course of this step, the operator manually introduces the second textile piece 54 in an approximate position.
  • This second part 54 is also pushed in the direction of arrow D (fig 4c) until the side 55 along which the seam is to be made is positioned exactly along the stop line 50, then (fig 4d ) it is moved along D ⁇ until the other side 56 has reached the reference line 53.
  • the two textile pieces 49 and 54 have their two sides (51 and 55), (52 and 56) respectively positioned according to the same lines (50 and 53): these two parts are exactly superimposed.
  • the two parts are then simultaneously and at the same speed moved along D ⁇ and introduced under the presser foot 47 of the sewing machine.
  • the claws 17 and 18 are in the high position, they are outside the grooves 15 and 16 formed in the plates 2 and 4 (fig 5a).
  • the operator manually introduces the first part 49 between the plates 2 and 3, while the compressed air is supplied by the orifices 6 and push the part 49 at the bottom of the guide 1 against the stop 11.
  • the action of the air jets is maintained during all the following operations, including sewing.
  • the part 49 obscures the photoelectric cell 46.
  • the operator presses on a control pedal which triggers the retraction of the cylinder 45 ⁇ (from the caliper 22 under the plate 19, corresponding to the cylinder 45 of the caliper 23).
  • the retraction of the cylinder 45 ⁇ applies the claw 17 to the part 49 against the underside of the intermediate plate 3.
  • the part is thus pinched between the claw 17 and the plate 3 (fig 5b).
  • the stepping motor 24 ⁇ starts and drives the claw 17 until the part 49 discovers the cell 46 (fig 5c).
  • the side 52 of the part 49 is then positioned along the reference line 53.
  • the drive of the claw 17 by the rotation of the stepping motor 24 ⁇ is carried out as follows.
  • the pulley 27 ⁇ of the motor 24 ⁇ rotates the axis 25 ⁇ via the toothed belt 28 ⁇ and the pulley 26 ⁇ .
  • the pinion 39 ⁇ , mounted on the axis 25 ⁇ turns on itself and causes the displacement of the rack 38 ⁇ , and consequently of the mechanism 34 ⁇ , of the support 37 ⁇ and therefore of the claw 17.
  • the mechanism 34 ⁇ is kept horizontal, during of its movement, by the guides 32 ⁇ and 33 ⁇ passing through the guide axes 30 ⁇ and 31 ⁇ .
  • the same operations are carried out for the positioning of the second textile piece 54.
  • the operator manually introduces this piece 54 between the two plates 3 and 4 of the edge guide 1.
  • the area jets, leaving the orifices 10, push the part 54 up to the stop 12 of the guide bottom.
  • the cell 46 is then again obscured.
  • the operator presses on the control pedal which triggers the retraction of the jack 45 and the descent of the claw 18 against the upper face of the intermediate plate 3 (fig 5d).
  • the claw 18 moves, driving the part 54 until the cell 46 is again discovered (fig 5e).
  • the side 56 of the part 54 is then positioned along the line of reference 53 and the two parts 49 and 54 are exactly superimposed.
  • the two stepping motors 24 and 24 ⁇ rotate at a predetermined number of steps in the opposite direction to the previous direction of rotation, which causes the two claws 17 and 18 to move simultaneously and at the same speed. direction of the presser foot 47.
  • the number of steps is fixed as a function of the distance separating the reference line 53, marked by the cell 46, and the underside of the presser foot 47. In this way the two parts are introduced, exactly superimposed under the presser foot 47 (fig 5f). Then the jacks 45 and 45 ⁇ come out and move the claws 17 and 18 to their initial position (fig 5a), which position is determined by that of the proximity detectors 47 and 48.
  • the air jets coming from the orifices 6 not only push the knitted fabric towards the stop 11 of the bottom of the guide 1 but also unroll the edge before it reaches the bottom of the guide (fig 7).
  • the description which has just been made corresponds to a use of the device according to the invention in assistance to an operator for the automatic adjustment and introduction of two angles of parts under the sewing machine.
  • the device can also be an automation element in a more complex machine.

Abstract

The invention consists in manually inserting a first piece of fabric (49) into the bottom portion of an edge guide comprising three superposed plates (2, 3, 4). The piece of fabric is pushed towards the end of the edge guide by means of jets of air until the side (51) of the piece along which sewing is to be performed is aligned with an end abutment. A dog (17) placed beneath the bottom plate (2) presses the piece of fabric (49) against the bottom face of the middle plate (3) and then displaces it along the sewing line direction until the other side (52) of the corner has reached a reference line (53). A second piece of fabric (54) is manually inserted and is positioned in the same way as the first by means of a dog (18) placed above the top plate (4). Once both of the pieces of fabric (49 and 54) are exactly superposed, the dogs (17, 18) drive them simultaneously at the same speed under the presser foot (47) of the sewing machine.

Description

La présente invention concerne l'introduction automatique de pièces textiles sous le pied presseur d'une machine à coudre, et plus particulièrement l'introduction de deux pièces superposées après ajustement des deux angles correspondants. L'invention a trait au domaine de la confection d'articles textiles, mais peut plus généralement concerner tous les domaines où il est nécessaire de superposer exactement et d'assembler deux pièces souples.The present invention relates to the automatic introduction of textile pieces under the presser foot of a sewing machine, and more particularly the introduction of two superimposed pieces after adjustment of the two corresponding angles. The invention relates to the field of making textile articles, but can more generally relate to all fields where it is necessary to superimpose exactly and assemble two flexible pieces.

En confection, l'assemblage de deux pièces d'étoffe le long de leurs bords est une opération fréquente, qui nécessite d'abord l'ajustement des deux angles par lesquels la couture commence. La superposition des deux pièces et la mise en coïncidence des deux côtés de l'angle sur quelques centimètres sont des manipulations difficiles dont la durée croît avec la complexité de la saisie de chaque pièce. Par exemple dans le cas d'un tricot jersey, l'ajustement est souvent précédé d'un déroulage des bords. Une fois que l'ajustement est terminé, les deux pièces superposées sont amenées et introduites sous le pied presseur de la machine à coudre. Toutes ces opérations, dites d'avant piquage, sont réalisées manuellement et exigent de la part de l'opérateur beaucoup de précision et d'habitude.In clothing, the assembly of two pieces of fabric along their edges is a frequent operation, which first requires the adjustment of the two angles at which sewing begins. The superimposition of the two pieces and the coincidence of the two sides of the angle over a few centimeters are difficult manipulations, the duration of which increases with the complexity of entering each piece. For example in the case of a jersey knit, the adjustment is often preceded by an unwinding of the edges. Once the adjustment is complete, the two overlapping pieces are brought in and introduced under the presser foot of the sewing machine. All of these operations, known as pre-stitching operations, are carried out manually and require a great deal of precision and custom on the part of the operator.

Or on a trouvé, et c'est ce qui fait l'objet de l'invention, un procédé d'assistance à l'opérateur qui permet, à partir d'une superposition manuelle approximative des deux pièces et de leur positionnement approximatif au voisinage des angles concernés, de réaliser automatiquement l'ajustement exact des deux angles et l'introduction des deux pièces superposées sous le pied presseur de la machine à coudre.Now we have found, and this is what is the subject of the invention, a method of assistance to the operator which allows, from an approximate manual superposition of the two parts and their approximate positioning in the vicinity of the angles concerned, to automatically carry out the exact adjustment of the two angles and the introduction of the two superimposed pieces under the presser foot of the sewing machine.

Le procédé de l'invention comprend les étapes suivantes :

  • a. La première pièce, introduite manuellement sur une première surface de glissement coplanaire du plan de travail de la machine à coudre, est poussée par des premiers moyens de poussée jusqu'à une première butée rectiligne, parallèle à la ligne de couture et légèrement au-delà de ladite ligne.
  • b. une fois que le côté de l'angle, le long duquel doit être effectuée la couture, est positionné contre la première butée,des premiers moyens de déplacement s'appliquent sur la première pièce et déplacent celle-ci par glissement sur la première surface de glissement selon une direction parallèle à la ligne de couture, jusqu'à ce que l'autre côté de l'angle de la première pièce atteigne une ligne de référence prédéterminée.
  • c. la seconde pièce, introduite manuellement sur une seconde surface de glissement dont le plan est parallèle et au-dessus de la première surface de glissement, est poussée par des seconds moyens de poussée jusqu'à une seconde butée rectiligne, située dans le plan vertical de la première butée,
  • d. une fois que le côté de l'angle, le long duquel doit être effectuée la couture, est positionné contre la seconde butée, des seconds moyens de déplacement s'appliquent sur la seconde pièce et déplacent celle-ci par glissement sur la seconde surface de glissement , selon une direction parallèle à la ligne de couture, jusqu'à ce que l'autre côté de l'angle de la seconde pièce atteigne la ligne de référence prédéterminée,
  • e. les deux pièces étant ainsi superposées, elles sont déplacées simultanément par les premiers et les seconds moyens de déplacement et introduites sous le pied presseur de la machine à coudre.
The method of the invention comprises the following steps:
  • at. The first part, introduced manually on a first coplanar sliding surface of the work surface of the sewing machine, is pushed by first pushing means to a first rectilinear stop, parallel to the seam line and slightly beyond of said line.
  • b. once the side of the angle, along which the seam is to be made, is positioned against the first stop, first displacement means are applied to the first part and move it by sliding on the first surface of sliding in a direction parallel to the seam line, until the other side of the corner of the first piece reaches a predetermined reference line.
  • vs. the second part, manually inserted on a second sliding surface whose plane is parallel and above the first sliding surface, is pushed by second pushing means to a second rectilinear stop, located in the vertical plane of the first stop,
  • d. once the side of the angle, along which the seam is to be made, is positioned against the second stop, second displacement means are applied to the second part and move it by sliding on the second surface of sliding, in a direction parallel to the seam line, until the other side of the angle of the second part reaches the predetermined reference line,
  • e. the two parts being thus superimposed, they are moved simultaneously by the first and second displacement means and introduced under the presser foot of the sewing machine.

Ainsi, il suffit à l'opérateur d'introduire manuellement la première pièce (a) puis la seconde (c), sur chacune des surfaces de glissement correspondantes, et dans un positionnement approximatif au voisinage des angles concernés. La première pièce est d'abord positionnée précisément le long de la première butée selon le côté de l'angle le long duquel doit être effectuée la couture, puis le long de la ligne de référence selon l'autre côté de l'angle. Le même positionnement intervient ensuite pour la seconde pièce, puis les deux pièces exactement superposées sont déplacées simultanément et introduites sous le pied presseur de la machine à coudre.Thus, it suffices for the operator to manually introduce the first part (a) then the second (c), on each of the corresponding sliding surfaces, and in an approximate positioning in the vicinity of the angles concerned. The first part is first positioned precisely along the first stop along the side of the angle along which the seam is to be made, then along the reference line along the other side of the angle. The same positioning then occurs for the second part, then the two exactly superimposed parts are moved simultaneously and introduced under the presser foot of the sewing machine.

Le procédé de l'invention permet un travail partiellement en temps masqué, dans la mesure où l'opérateur prépare et introduit la seconde pièce pendant que se déroule le positionnement de la première pièce selon les étapes a et b.The method of the invention allows partially hidden time work, insofar as the operator prepares and introduces the second part while the positioning of the first part takes place according to steps a and b.

Le terme butée rectiligne employé ci-dessus doit être pris dans un sens large ; il s'agit d'un moyen le long duquel la pièce finit son déplacement. Ce peut être effectivement une butée au sens habituel du terme, c'est-à-dire un moyen matériel contre lequel le côté de la pièce sera contraint de s'arrêter. Mais ce peut être aussi, selon le procédé de l'invention, un moyen immatériel, une ligne de référence le long de laquelle le côté de la pièce se positionnera. Dans le premier cas, les moyens de poussée auront pour seule fonction de pousser la pièce dans la direction de la butée ; dans le second cas, les moyens de poussée auront comme fonction supplémentaire d'arrêter la pièce le long de la ligne de référence constituant la butée.The term straight stop used above should be taken in a broad sense; it is a means along which the part finishes moving. It can actually be a stop in the usual sense of the term, that is to say a material means against which the side of the part will be forced to stop. But it can also be, according to the method of the invention, an intangible means, a reference line along which side of the room will position. In the first case, the pushing means will have the sole function of pushing the part in the direction of the stop; in the second case, the thrust means will have the additional function of stopping the part along the reference line constituting the stop.

C'est un autre objet de l'invention que de proposer un dispositif spécialement conçu pour la mise en oeuvre du procédé précité. Ce dispositif comprend les éléments suivants :

  • a. une première plaque de glissement, coplanaire au plan de travail de la machine à coudre, et sur laquelle est placée une première butée rectiligne , parallèle à la ligne de couture et légèrement au-delà de ladite ligne,
  • b. une seconde plaque de glissement dont le plan est parallèle et au-dessus de la première plaque de glissement, et sur laquelle est placée une seconde butée rectiligne située dans le plan vertical de la première butée,
  • c. deux ensembles de moyens de poussée, chaque ensemble étant associé respectivement à l'une des plaques de glissement et capable de déplacer la pièce jusqu'à la butée correspondante,
  • d. deux ensembles de moyens de déplacement, chaque ensemble étant capable de déplacer respectivement une pièce dans une direction parallèle à la ligne de couture, d'abord jusqu'à une ligne de référence puis jusqu'au pied presseur de la machine à coudre, par glissement sur respectivement la face inférieure et la face supérieure de la seconde plaque de glissement.
It is another object of the invention to provide a device specially designed for the implementation of the above method. This system includes the following elements:
  • at. a first sliding plate, coplanar with the work surface of the sewing machine, and on which is placed a first rectilinear stop, parallel to the seam line and slightly beyond said line,
  • b. a second sliding plate whose plane is parallel and above the first sliding plate, and on which is placed a second rectilinear stop located in the vertical plane of the first stop,
  • vs. two sets of thrust means, each set being associated respectively with one of the sliding plates and capable of moving the part up to the corresponding stop,
  • d. two sets of movement means, each set being capable of respectively moving a workpiece in a direction parallel to the seam line, first to a reference line and then to the presser foot of the sewing machine, by sliding respectively on the lower face and the upper face of the second sliding plate.

Préférentiellement les moyens de poussée sont des moyens pneumatiques qui consistent en des buses, alimentées en air comprimé et inclinées dans la direction de poussée de la pièce.Preferably, the pushing means are pneumatic means which consist of nozzles, supplied with compressed air and inclined in the pushing direction of the part.

Préférentiellement, chaque ensemble de moyens de déplacement comprend :

  • a. une griffe,
  • b. le dispositif d'entraînement de la griffe capable de lui communiquer soit un mouvement vertical, entre une première position où la griffe est éloignée de la seconde plaque de g glissement et une seconde position où la griffe est en contact avec ladite plaque, soit un mouvement horizontal dans la direction de la ligne de couture,
  • c. des moyens de repérage de la pièce lors de son déplacement sur la seconde plaque de glissement agissant sur le dispositif d'entraînement de telle sorte que celui-ci n'entraîne plus la pièce lorsque le côté correspondant a atteint la ligne de référence.

Par ailleurs, chaque dispositif d'entraînement est relié à des moyens de synchronisation qui commandent simultanément et à la même vitesse le déplacement horizontal des deux griffes vers la machine à coudre sur une distance égale à celle qui sépare la ligne de référence et le dessus du pied presseur de la machine à coudrePreferably, each set of displacement means comprises:
  • at. a claw,
  • b. the claw drive device capable of communicating to it either a vertical movement, between a first position where the claw is distant from the second sliding plate and a second position where the claw is in contact with said plate, or a movement horizontal in the direction of the seam line,
  • vs. means for locating the part during its movement on the second sliding plate acting on the drive device of such so that it no longer drives the part when the corresponding side has reached the reference line.

In addition, each drive device is connected to synchronization means which simultaneously control and at the same speed the horizontal movement of the two prongs towards the sewing machine over a distance equal to that which separates the reference line and the top of the sewing machine presser foot

Selon un mode de réalisation privilégié, le dispositif selon l'invention comporte une troisième plaque de glissement, sensiblement parallèle au plan de travail, située au-dessus de la seconde plaque de glissement, et les moyens de poussée consistent en des orifices pratiqués dans la première et ladite troisième plaque de glissementAccording to a preferred embodiment, the device according to the invention comprises a third sliding plate, substantially parallel to the work plane, located above the second sliding plate, and the pushing means consist of orifices made in the first and said third sliding plate

La seconde et la troisième plaque ont du côté opposé à la butée une forme légèrement recourbée vers le haut pour faciliter l'introduction de la pièce dans les intervalles entre , d'une part la première et seconde plaques (première pièce) et d'autre part la seconde et troisième plaques (seconde pièce).The second and the third plate have on the side opposite the stop a slightly curved upward shape to facilitate the introduction of the part in the intervals between, on the one hand the first and second plates (first part) and on the other share the second and third plates (second piece).

L'invention sera mieux comprise grâce à l'exemple de réalisation privilégié qui va être maintenant décrit, en référence au dessin annexé dans lequel :

  • la figure 1 est une coupe du dispositif transversale à la ligne de couture
  • la figure 2 est une coupe du dispositif longitudinale à la ligne de couture
  • la figure 3 est une vue de dessus du dispositif
  • les figures 4 a à 4 e illustrent schématiquement en vue de dessus les différentes étapes de fonctionnement
  • les figures 5a à 5 f illustrent schématiquement en coupe longitudinale à la ligne de couture les différentes étapes du fonctionnement
  • la figure 6 illustre la position prise par les deux pièces entre les plaques
  • la figure 7 illustre le cas du tricot jersey
The invention will be better understood thanks to the preferred embodiment which will now be described, with reference to the appended drawing in which:
  • Figure 1 is a section of the device transverse to the seam line
  • Figure 2 is a section of the longitudinal device at the seam line
  • Figure 3 is a top view of the device
  • Figures 4 a to 4 e schematically illustrate a top view of the different operating steps
  • Figures 5a to 5f schematically illustrate in longitudinal section at the seam line the different stages of operation
  • Figure 6 illustrates the position taken by the two parts between the plates
  • Figure 7 illustrates the case of jersey knitting

Le guide-bord 1 est constitué de trois plaques 2,3 et 4 superposées. La plaque inférieure 2 est placée devant la plaque à aiguille 5 de telle sorte que les faces supérieures de ces deux plaques 2 et 5 soient coplanaires. Elle comporte plusieurs orifices 6, inclinés par rapport au plan horizontal et débouchant dans un logement 7 pratiqué dans la plaque 2 elle-même, ledit logement 7 étant fermé par une plaquette 8 au travers de laquelle est fixée l'arrivée d'air comprimé 9. La plaque supérieure 4 comporte également des orifices 10 alimentés en air comprimé de la même façon que les orifices 6. Dans les deux cas, ces orifices 6 et 10 sont orientés sensiblement dans la direction de la flèche D. Les plaques 2 et 4 sont séparées de la plaque intermédiaire 3 au moyen des cales 11 et 12 qui constituent les butées de fond de guide. Les parties intérieures de cales 11 et 12 formant butées sont dans le même plan vertical, parallèle à la ligne de couture 13 passant par l'aiguille 14.The edge guide 1 consists of three overlapping plates 2, 3 and 4. The lower plate 2 is placed in front of the needle plate 5 so that the upper faces of these two plates 2 and 5 are coplanar. It has several orifices 6, inclined by relative to the horizontal plane and opening into a housing 7 formed in the plate 2 itself, said housing 7 being closed by a plate 8 through which the compressed air inlet 9 is fixed. The upper plate 4 also includes orifices 10 supplied with compressed air in the same way as the orifices 6. In both cases, these orifices 6 and 10 are oriented substantially in the direction of the arrow D. The plates 2 and 4 are separated from the intermediate plate 3 by means wedges 11 and 12 which constitute the guide bottom stops. The inner parts of shims 11 and 12 forming stops are in the same vertical plane, parallel to the seam line 13 passing through the needle 14.

Chaque plaque 2 et 4 est partiellement évidée selon une rainure, respectivement 15 et 16, dans laquelle prend place une griffe, respectivement 17 et 18. Cette rainure 15 ou 16 permet le déplacement de la griffe 17 ou 18 dans son mouvement horizontal selon la direction de la ligne de couture 13. Chaque griffe 17 ou 18 est reliée à un dispositif d'entraînement permettant à la griffe de se mouvoir verticalement et horizontalement. Ce dispositif d'entraînement est constitué des éléments décrits ci-après.Each plate 2 and 4 is partially hollowed out according to a groove, respectively 15 and 16, in which a claw takes place, respectively 17 and 18. This groove 15 or 16 allows the claw 17 or 18 to move in its horizontal movement in the direction of the seam line 13. Each claw 17 or 18 is connected to a drive device allowing the claw to move vertically and horizontally. This drive device consists of the elements described below.

Sur une plaque 19, solidaire du bâti de la machine à coudre 20 par l'intermédiaire d'une articulation à axe vertical 21, sont fixés deux étriers identiques 22 et 23. Chaque étrier reçoit les éléments correspondant aux déplacements d'une griffe, l'étrier inférieur 2 2 reçoit les éléments correspondant à la griffe inférieure 17, l'étrier supérieur 23 ceux de la griffe supérieure 18. L'étrier 22 supporte d'une part le moteur pas à pas 24 et d'autre part l'axe de rotation 25. Une poulie 26 est calée sur l'axe 25 et est reliée à la poulie 27 du moteur 24 par l'intermédiaire de la courroie crantée 28.Une pièce support 29 est articulée autour de l'axe 25;elle comporte deux trous d'axe de guidage 30 et 31 dans lesquels coulissent les axes 32 et 33 fixés sur un mécanisme 34.Ce mécanisme 34 comprend un bras 35,portant à son extrémité le support 37 de la griffe 18, et une crémaillère 38 qui s'engrène avec le pignon 39 bloqué sur l'axe 25. Le ressort 41 et la vis de réglage 40, fixéssur l'étrier 23, permettent d'appliquer une pression réglable sur le bras 35 par l'intermédiaire de la pièce 42 qui porte le galet 43, ce galet 43 étant encastré dans la coulisse 36. Cette disposition autorise le déplacement du bras 35 en maintenant l'action du ressort 41. La partie inférieure 44 de la pièce 42 reçoit l'extrémité de la tige du vérin 45, fixé sur la plaque 19.Two identical stirrups 22 and 23 are fixed on a plate 19, integral with the frame of the sewing machine 20 by means of a hinge with a vertical axis 21. Each stirrup receives the elements corresponding to the movements of a claw, l lower caliper 2 2 receives the elements corresponding to the lower claw 17, the upper caliper 23 those of the upper claw 18. The caliper 22 supports on the one hand the stepping motor 24 and on the other hand the axis of rotation 25. A pulley 26 is fixed on the axis 25 and is connected to the pulley 27 of the motor 24 by means of the toothed belt 28. A support part 29 is articulated around the axis 25; it comprises two guide pin holes 30 and 31 in which the pins 32 and 33 slide fixed on a mechanism 34. This mechanism 34 comprises an arm 35, carrying at its end the support 37 of the claw 18, and a rack 38 which meshes with the pinion 39 locked on the axis 25. The spring 41 and l with adjusting screws 40, fixed on the stirrup 23, make it possible to apply an adjustable pressure on the arm 35 by means of the part 42 which carries the roller 43, this roller 43 being embedded in the slide 36. This arrangement allows the movement of the arm 35 while maintaining the action of the spring 41. The part lower 44 of the part 42 receives the end of the rod of the jack 45, fixed on the plate 19.

Le guide-bord 1 est fixé à l'extrémité de la plaque 19. De cette façon l'ensemble du dispositif est escamotable par pivotement autour de l'axe 21 pour laisser l'accès aux organes de la machine à coudre. Une vis de blocage, non représentée, permet de fixer en position l'ensemble du dispositif.The edge guide 1 is fixed to the end of the plate 19. In this way the entire device is retractable by pivoting around the axis 21 to allow access to the organs of the sewing machine. A locking screw, not shown, allows the entire device to be fixed in position.

Une cellule photo-électrique 46 est placée au-dessus du guide-bord 1 et devant le pied presseur 47 de la machine à coudre. L'axe de travail de la cellule 46 est vertical et les plaques 3 et 4 sont percées pour permettre le passage du flux lumineux. La cellule photo-électrique 46 est reliée au moteur pas à pas 24. Deux détecteurs de proximité 47 et 48 , placés sous le mécanisme 34, sont également reliés au moteur pas à pas 24.A photoelectric cell 46 is placed above the edge guide 1 and in front of the presser foot 47 of the sewing machine. The working axis of the cell 46 is vertical and the plates 3 and 4 are drilled to allow the passage of the light flux. The photocell 46 is connected to the stepping motor 24. Two proximity detectors 47 and 48, placed under the mechanism 34, are also connected to the stepping motor 24.

Nous décrivons d'abord le déroulement des étapes du procédé dans sa généralité à l'aide des schémas de la figure 4. La première pièce textile 49 est introduite manuellement par l'opérateur dans un positionnement approximatif ; elle est poussée vers la ligne de butée 50 dans le sens de la flèche D, transversalement à la ligne de couture 13 (fig 4a). Une fois le côté 51, le long duquel doit être effectuée la couture , positionné exactement le long de la ligne de butée 50, la première pièce 49 est déplacée dans le sens de la flèche Dʹ (fig 4b) jusqu'à ce que l'autre côté 52 de l'angle ait atteint la ligne de référence 53 (fig. 4c). Pendant le déroulement de cette étape, l'opérateur introduit manuellement la seconde pièce textile 54 dans un positionnement approximatif. Cette second pièce 54 est également poussée dans la direction de la flèche D (fig 4c) jusqu'à ce que le côté 55 le long duquel doit être effectuée la couture soit positionné exactement le long de la ligne de butée 50, puis (fig 4d) elle est déplacée selon Dʹ jusqu'à ce que l'autre côté 56 ait atteint la ligne de référence 53. Ainsi les deux pièces textiles 49 et 54 ont respectivement leurs deux côtés (51 et 55) , (52 et 56) positionnés selon les même lignes (50 et 53) : ces deux pièces sont exactement superposées. Les deux pièces sont alors simultanément et à la même vitesse déplacées selon Dʹ et introduites sous le pied presseur 47 de la machine à coudre.We first describe the progress of the process steps in general using the diagrams in Figure 4. The first textile piece 49 is introduced manually by the operator in an approximate position; it is pushed towards the stop line 50 in the direction of arrow D, transverse to the seam line 13 (fig 4a). Once the side 51, along which the sewing is to be carried out, positioned exactly along the stop line 50, the first part 49 is moved in the direction of the arrow Dʹ (fig 4b) until the other side 52 of the angle has reached the reference line 53 (fig. 4c). During the course of this step, the operator manually introduces the second textile piece 54 in an approximate position. This second part 54 is also pushed in the direction of arrow D (fig 4c) until the side 55 along which the seam is to be made is positioned exactly along the stop line 50, then (fig 4d ) it is moved along Dʹ until the other side 56 has reached the reference line 53. Thus the two textile pieces 49 and 54 have their two sides (51 and 55), (52 and 56) respectively positioned according to the same lines (50 and 53): these two parts are exactly superimposed. The two parts are then simultaneously and at the same speed moved along Dʹ and introduced under the presser foot 47 of the sewing machine.

Plus précisément le fonctionnement du dispositif décrit ci-dessus est le suivant. Avant l'introduction de la première pièce textile, les griffes 17 et 18 sont en position haute, elles sont à l'extérieur des rainures 15 et 16 pratiquées dans les plaques 2 et 4 (fig 5a). L'opérateur introduit manuellement la première pièce 49 entre les plaques 2 et 3 , tandis que l'air comprimé est alimenté par les orifices 6 et poussent la pièce 49 au fond du guide 1 contre la butée 11. L'action des jets dʹ air est maintenue pendant toutes les opérations suivantes, y compris la couture. La pièce 49 occulte la cellule photo-électrique 46. L'opérateur appuie sur une pédale de commande qui déclenche la rentrée du vérin 45ʹ (de l'étrier 22 sou s la plaque 19, correspondant au vérin 45 de l'étrier 23). La rentrée du vérin 45ʹ applique la griffe 17 sur la pièce 49 contre la face inférieure de la plaque intermédiaire 3. La pièce est ainsi pincée entre la griffe 17 et la plaque 3 (fig 5b). Puis, après effet d'une temporisation, le moteur pas à pas 24ʹ se met en marche et entraîne la griffe 17 jusqu'à ce que la pièce 49 découvre la cellule 46 (fig 5c). Le côté 52 de la pièce 49 est alors positionné le long de la ligne de référence 53.More precisely the operation of the device described above is the next. Before the introduction of the first textile part, the claws 17 and 18 are in the high position, they are outside the grooves 15 and 16 formed in the plates 2 and 4 (fig 5a). The operator manually introduces the first part 49 between the plates 2 and 3, while the compressed air is supplied by the orifices 6 and push the part 49 at the bottom of the guide 1 against the stop 11. The action of the air jets is maintained during all the following operations, including sewing. The part 49 obscures the photoelectric cell 46. The operator presses on a control pedal which triggers the retraction of the cylinder 45ʹ (from the caliper 22 under the plate 19, corresponding to the cylinder 45 of the caliper 23). The retraction of the cylinder 45ʹ applies the claw 17 to the part 49 against the underside of the intermediate plate 3. The part is thus pinched between the claw 17 and the plate 3 (fig 5b). Then, after the effect of a time delay, the stepping motor 24ʹ starts and drives the claw 17 until the part 49 discovers the cell 46 (fig 5c). The side 52 of the part 49 is then positioned along the reference line 53.

L'entraînement de la griffe 17 par la rotation du moteur pas à pas 24ʹ est réalisé de la façon suivante. La poulie 27ʹ du moteur 24ʹ entraîne en rotation l'axe 25ʹ par l'intermédiaire de la courroie crantée 28ʹ et de la poulie 26ʹ. Le pignon 39ʹ, monté sur l'axe 25ʹ, tourne sur lui-même et entraîne le déplacement de la crémaillère 38ʹ, et par conséquent du mécanisme 34ʹ, du support 37ʹ et donc de la griffe 17. Le mécanisme 34ʹ est maintenu horizontal, lors de son déplacement, par les guides 32ʹ et 33ʹ passant dans les axes de guidage 30ʹ et 31ʹ.The drive of the claw 17 by the rotation of the stepping motor 24ʹ is carried out as follows. The pulley 27ʹ of the motor 24ʹ rotates the axis 25ʹ via the toothed belt 28ʹ and the pulley 26ʹ. The pinion 39ʹ, mounted on the axis 25ʹ, turns on itself and causes the displacement of the rack 38ʹ, and consequently of the mechanism 34ʹ, of the support 37ʹ and therefore of the claw 17. The mechanism 34ʹ is kept horizontal, during of its movement, by the guides 32ʹ and 33ʹ passing through the guide axes 30ʹ and 31ʹ.

Les mêmes opérations sont mises en oeuvre pour le positionnement de la seconde pièce textile 54. L'opérateur introduit manuellement cette pièce 54 entre les deux plaques 3 et 4 du guide-bord 1. Les jets d'aire, sortant des orifices 10, poussent la pièce 54 jusqu'à la butée 12 de fond de guide. La cellule 46 est alors à nouveau occultée. L'opérateur appuie sur la pédale de commande qui déclenche la rentrée du vérin 45 et la descente de la griffe 18 contre la face supérieure de la plaque intermédiaire 3 (fig 5d). Après temporisation, sous l'action du moteur pas à pas 24, la griffe 18 se déplace, entraînant la pièce 54 jusqu'à ce que la cellule 46 soit de nouveau découverte (fig 5e). Le côté 56 de la pièce 54 est alors positionné le long de la ligne de référence 53 et les deux pièces 49 et 54 sont exactement superposées.The same operations are carried out for the positioning of the second textile piece 54. The operator manually introduces this piece 54 between the two plates 3 and 4 of the edge guide 1. The area jets, leaving the orifices 10, push the part 54 up to the stop 12 of the guide bottom. The cell 46 is then again obscured. The operator presses on the control pedal which triggers the retraction of the jack 45 and the descent of the claw 18 against the upper face of the intermediate plate 3 (fig 5d). After time delay, under the action of the stepping motor 24, the claw 18 moves, driving the part 54 until the cell 46 is again discovered (fig 5e). The side 56 of the part 54 is then positioned along the line of reference 53 and the two parts 49 and 54 are exactly superimposed.

Dès que la cellule 46 est découverte, les deux moteurs pas à pas 24 et 24ʹ tournent à un nombre de pas prédéterminé dans le sens inverse au sens de rotation précédent ce qui entraîne le déplacement simultané et à même vitesse des deux griffes 17 et 18 en direction du pied presseur 47. Le nombre de pas est fixé en fonction de la distance séparant la ligne de référence 53, marquée par la cellule 46, et le dessous du pied presseur 47. De la sorte les deux pièces sont introduites, exactement superposées sous le pied presseur 47 (fig 5f). Puis les vérins 45 et 45ʹ sortent et éloignent les griffes 17 et 18 à leur position initiale (fig 5a), position qui est déterminée par celle des détecteurs de proximité 47 et 48.As soon as the cell 46 is discovered, the two stepping motors 24 and 24ʹ rotate at a predetermined number of steps in the opposite direction to the previous direction of rotation, which causes the two claws 17 and 18 to move simultaneously and at the same speed. direction of the presser foot 47. The number of steps is fixed as a function of the distance separating the reference line 53, marked by the cell 46, and the underside of the presser foot 47. In this way the two parts are introduced, exactly superimposed under the presser foot 47 (fig 5f). Then the jacks 45 and 45ʹ come out and move the claws 17 and 18 to their initial position (fig 5a), which position is determined by that of the proximity detectors 47 and 48.

Dans le cas des pièces textiles dont les bords ont tendance à rouler sur eux-mêmes, notamment les tricots jersey, les jets d'air provenant des orifices 6 non seulement poussent le tricot vers la butée 11 du fond du guide 1 mais également déroulent le bord avant qu'il n'atteigne le fond du guide (fig 7).In the case of textile pieces whose edges tend to roll on themselves, in particular the jersey knits, the air jets coming from the orifices 6 not only push the knitted fabric towards the stop 11 of the bottom of the guide 1 but also unroll the edge before it reaches the bottom of the guide (fig 7).

La description qui vient d'être faite correspond à une utilisation du dispositif selon l'invention en assistance à une opérateur pour lʹ ajustement et l'introduction automatiques de deux angles de pièces sous la machine à coudre. Le dispositif peut être également un élément dʹ automatisation dans une machine plus complexe. On peut citer comme exemple la couture simultanée des deux côtés d'un vêtement au moyen de deux machines à coudre équipées toutes deux du dispositif selon l'invention.The description which has just been made corresponds to a use of the device according to the invention in assistance to an operator for the automatic adjustment and introduction of two angles of parts under the sewing machine. The device can also be an automation element in a more complex machine. One can cite as an example the simultaneous sewing of the two sides of a garment by means of two sewing machines both equipped with the device according to the invention.

Claims (7)

  1. Method of automatically matching two pieces of fabric and of inserting them in a sewing machine, the method comprising the following steps:
    a. the first piece (49), is inserted manually over a first slide surface (2) coplanar with the working plane (5) of the sewing machine, and is pushed by first thrust means (6) up to a first rectilinear abutment (11) which is parallel to the sewing line (13) and which is slightly beyond said line,
    b. once the side (51) of the corner along which sewing is to take place has been positioned against the first abutment (11), first displacement means (17) press against the first piece (49) and displace it by sliding over the first slide surface (2) along a direction (D') parallel to the sewing line (13) until the other side (52) of the angle in the first piece has reached a predetermined reference line (53),
    c. the second piece (54) is inserted manually over a second slide surface (3) whose plane is parallel to and lies above the first slide surface (2), the piece is pushed by second thrust means (10) until it reaches a second rectilinear abutment (12) situated in the same vertical plane as the first abutment (11),
    d. once the side (55) of the corner along which sewing is to take place has been positioned against the second abutment (12), second displacement means (18) press against the second piece (54) and displace it by sliding over the second slide surface (3) along a direction (D') parallel to the sewing line (13), until the other side (56) of the corner of the second piece (54) reaches the predetermined reference line (53),
    e. with both pieces (49,54) superposed in this way, they are simultaneously displaced by the first (17) and second (18) displacement means and are inserted beneath the presser foot (47) of the sewing machine.
  2. Apparatus for implementing the method according to claim 1, characterized in that it comprises:
    a. a first slide plate (2) which is coplanar with the working plane (5) of the sewing machine and on which a first rectilinear abutment (11) is placed parallel to the sewing line (13) and slightly beyond said line,
    b. a second slide plate (3) whose plane is parallel to and lies above the first slide plate (2), and on which a second rectilinear abutment (12) is placed in the same vertical plane as the first abutment (11),
    c. two sets (6,10) of thrust means, each set being associated with a respective one of the slide surfaces (2,3) and being capable of displacing the piece of fabric (49,54) up to the corresponding abutment (11,12),
    d. two sets (17,18) of displacement means each set being capable of displacing a respective one of the pieces of fabric (49,54) in a direction (D') parallel to the sewing line (13), initially up to a reference line (53), and subsequently up to the presser foot (47) of the sewing machine, by sliding the pieces of fabric over the bottom face and the top face respectively of the second slide plate (3).
  3. Apparatus according to claim 2, characterized in that the thrust means are pneumatic means comprising nozzles (6,10) fed with compressed air and inclined in the direction along which the piece of fabric is to be thrust.
  4. Apparatus according to claim 2, characterized in that each set of displacement means comprises:
    a. a dog (17,18),
    b. a dog drive device capable of communicating thereto either a vertical motion between a first position in which the dog is at a distance from the second slide plate (3) and a second position in which the dog is in contact with said plate (3), or a horizontal motion along the direction (D') of the sewing line (13),
    c. means (46) for detecting a piece of fabric (49) as it moves over the second slide plate (3), said means acting on the drive device in such a manner as to prevent it from driving the piece of fabric (49) any further once its corresponding side (52) has reached the reference line (53).
  5. Apparatus according to claim 4, characterized in that each drive device is connected to synchronizing means for causing both dogs (17,18) to move simultaneously and at the same speed along the direction (D') of the sewing line (13) through a distance equal to the distance between the reference line (53) and the underside of the presser foot (47) of the sewing machine.
  6. Apparatus according to one of claims 2 to 5, characterized in that it includes a third slide plate (4) extending substantially parallel to the working plane (5) and situated above the second slide plate (3), and the thrust means consist in orifices (6,10) provided through the first slide plate (2) and through said third slide plate (4).
  7. Apparatus according to claim 6, characterized in that the first (2) and third (4) slide plates are slotted to allow the corresponding dog (17,18) to pass therealong as it moves horizontally in the direction (D') of the sewing line.
EP87402134A 1986-10-03 1987-09-24 Method and device for automatically introducing and positioning two corners of textile work pieces upon a sewing machine Expired - Lifetime EP0267816B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402134T ATE66504T1 (en) 1986-10-03 1987-09-24 METHOD AND DEVICE FOR INTRODUCING AND POSITIONING THE CORNER OF TWO TEXTILE WORKPIECES ON A SEWING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8613831A FR2604732B1 (en) 1986-10-03 1986-10-03 METHOD AND DEVICE FOR AUTOMATIC ADJUSTMENT AND INTRODUCTION OF TWO ANGLES OF TEXTILE WORKPIECES ON A SEWING MACHINE
FR8613831 1986-10-03

Publications (2)

Publication Number Publication Date
EP0267816A1 EP0267816A1 (en) 1988-05-18
EP0267816B1 true EP0267816B1 (en) 1991-08-21

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EP87402134A Expired - Lifetime EP0267816B1 (en) 1986-10-03 1987-09-24 Method and device for automatically introducing and positioning two corners of textile work pieces upon a sewing machine

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US (1) US4825788A (en)
EP (1) EP0267816B1 (en)
JP (1) JPS63164991A (en)
AT (1) ATE66504T1 (en)
DE (1) DE3772330D1 (en)
ES (1) ES2025682T3 (en)
FR (1) FR2604732B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8911087B2 (en) 2011-05-20 2014-12-16 Eyefluence, Inc. Systems and methods for measuring reactions of head, eyes, eyelids and pupils
US8408150B1 (en) 2011-09-20 2013-04-02 Tenna M. Ragan Sewing aid
CN105133199B (en) * 2015-09-08 2017-11-28 西安标准工业股份有限公司 It is a kind of to carry the sewing machine and its application method for sending template mechanism automatically

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2149069C3 (en) * 1971-10-01 1980-06-04 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Sewing machine with device for producing seams parallel to the edge
US3867889A (en) * 1973-08-03 1975-02-25 Stahl Urban Co Apparatus for seaming pieces of textile fabric or the like
DE2361375C2 (en) * 1973-12-10 1976-01-02 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Sewing machine for sewing two layers of material in the same position
IT1049824B (en) * 1974-12-05 1981-02-10 Pfaff Ind Masch SEWING SYSTEM SUITABLE TO JOIN BY SEWING LAYERS OF CLOTH SO THAT THEY ARE UNIFORM IN LENGTH
IT1042604B (en) * 1975-09-17 1980-01-30 Rockwell Rimoldi Spa DEVICE TO FACILITATE THE INSERTION OF TWO LAYERS OF FABRIC IN A GITRA OF A SEWING MACHINE
DE2608859C2 (en) * 1976-03-04 1983-10-13 Dürkoppwerke GmbH, 4800 Bielefeld Adjusting device with control means for the feed rate of a sewing machine
CA1065196A (en) * 1976-03-16 1979-10-30 Siegfried Wajcmann Sewing apparatus
US4037546A (en) * 1976-07-27 1977-07-26 Union Special G.M.B.H. Sewing machine apparatus for aligning and sewing pieces of textile fabric or the like
DE2839399A1 (en) * 1978-09-11 1980-03-20 Union Special Gmbh Fabric-guide device for sewing machines - having inclined airjets to hold and assist transport of the fabric
DE3441167A1 (en) * 1983-12-21 1985-07-04 Veb Rationalisierung Konfektion, Ddr 1017 Berlin METHOD AND DEVICE FOR EASILY MANIPULATABLE AND CONFIGURATING BED SLEEPERS OF SURFACE WORKPIECES, IN PARTICULAR TEXTILE CUTTING PARTS FOR SEWING DEVICES

Also Published As

Publication number Publication date
EP0267816A1 (en) 1988-05-18
FR2604732B1 (en) 1989-02-03
DE3772330D1 (en) 1991-09-26
JPS63164991A (en) 1988-07-08
US4825788A (en) 1989-05-02
ATE66504T1 (en) 1991-09-15
FR2604732A1 (en) 1988-04-08
ES2025682T3 (en) 1992-04-01

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