EP0371922A1 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
EP0371922A1
EP0371922A1 EP89810885A EP89810885A EP0371922A1 EP 0371922 A1 EP0371922 A1 EP 0371922A1 EP 89810885 A EP89810885 A EP 89810885A EP 89810885 A EP89810885 A EP 89810885A EP 0371922 A1 EP0371922 A1 EP 0371922A1
Authority
EP
European Patent Office
Prior art keywords
thread
machine according
needle
stop
claw
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
Application number
EP89810885A
Other languages
German (de)
French (fr)
Other versions
EP0371922B1 (en
Inventor
Antonio Jimenez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mefina SA
Original Assignee
Mefina SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mefina SA filed Critical Mefina SA
Publication of EP0371922A1 publication Critical patent/EP0371922A1/en
Application granted granted Critical
Publication of EP0371922B1 publication Critical patent/EP0371922B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks
    • D05B57/143—Vertical axis type
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B61/00—Loop holders; Loop spreaders; Stitch-forming fingers

Definitions

  • Sewing machines comprising a needle holder bar and means for imparting it back and forth longitudinal movements, means for fixing a needle on this bar and for feeding the thread thereof. , a loop sensor for gripping the thread brought by the needle and passing it around a bobbin, the thread of which then passes through this loop to form a stitch, a conveyor mechanism for moving the fabric to be sewn from sewing stitch made at the next stitch to be made, means being provided for slackening the thread coming from the bobbin, during each sewing stitch formation.
  • the subject of the invention is a sewing machine of the aforementioned kind, in which other means are provided for relaxing the lower thread, means which make it possible to achieve greater efficiency with simpler means.
  • the machine comprises a member actuated by the conveyor mechanism to relax the bobbin thread during each cycle of the conveyor mechanism.
  • the lower arm 1 of a sewing machine is hollowed out and contains a loop sensor forming part of a bowl 3 driven in rotation by a motor shaft 4 carrying a tangent screw 5 meshing with a toothed wheel 6 secured to the bowl 3.
  • the bowl 3 contains a spool of wire or bobbin, not shown, which is carried in a capsule 7, retained by well-known means so as not to be driven in rotation by the bowl 3.
  • the thread 8 from the bobbin passes under a tension spring 9 to feed the seam 10 of the fabrics 11.
  • the machine usually comprises a needle bar 12 provided with a needle 13, through the eye of which the upper thread 14 passes.
  • the machine also comprises a presser foot 15 pressed against the fabric by a rod 16 subjected to the action of a spring not shown.
  • This transport claw 17 is located under a needle plate 18, which, as shown in FIG. 3, has slots 19, only one of which is visible in the drawing, for the passage of the two toothed parts 20 of the claw 17.
  • This claw 17 is provided with a member intended to relax the thread of the bobbin during each cycle of the conveyor mechanism.
  • This member is constituted by an elastic steel wire 21 in the general shape of a U, the rear end of the branches of which is curved at 22 to be stowed in a part of the claw 17.
  • each of the branches of the U passes through a hole in a shoe 23, sliding in a vertical branch of the claw 17.
  • each shoe 23 abuts under the needle plate 18, as shown in FIG. 1, which deforms down the steel wire 21, which thus exerts a tension on the wire 8.
  • the thread is then relaxed, as shown in FIG. 2, which facilitates the entrainment of the lower thread inside the materials to be sewn, under the effect of the traction exerted by the upper thread 14, this whatever the sewing speed.
  • the length of the thread which is relaxed in each cycle, is a function of the horizontal distance traveled by the claw while the steel wire 21 acts on the wire 8. This gives a slack which increases substantially depending on the stitch length chosen.
  • the transverse branch 24 of the steel wire 21 has a bent shape which is intended to vary the extent of the slack depending on the lateral position of the wire 8 in the case where the machine is scheduled to perform zig-zag stitches.
  • bent shape of the steel wire must be adapted as a function of the general geometry of the machine, in particular the starting position of the lower wire 8 when it leaves the shoe 9 relative to the position of this wire in the seam 10.
  • the deflection of the wire 21 depends on the longitudinal position of the claw 17 of the conveyor and therefore therefore, on the length of stitches selected for sewing.
  • a similar effect could be obtained by providing a needle plate having different support levels for the two pads. These last two could also be replaced by a transverse pin connecting the two parallel branches of the U.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The fabric transport claw (17) of the sewing machine is equipped with a spring wire (21) bent at (22) and passing through a hole of a block (23). When the claw (17) is in the high position, the block (23) comes up against the plate (18), thus lowering the end (24) of the wire (21) in order to exert tension on the lower thread (8) of the stitched seam. When the transport claw descends, the wire (21) resumes its normal position, that is to say its end (24) moves upwards relative to the claw (17), and the thread (8) is thus relieved. <IMAGE>

Description

On connaît déjà des machines à coudre comprenant une barre porte-aiguille et des moyens pour lui imprimer des mouvements longitudinaux de va-et-vient, des moyens de fixation d'une aiguille sur cette barre et d'alimentation en fil de celle-ci, un capteur de boucle pour saisir le fil amené par l'aiguille et le faire passer autour d'une canette dont le fil passe alors dans cette boucle pour former un point de couture, un mécani­sme transporteur pour déplacer le tissu à coudre d'un point de couture effectué au point suivant à effectuer, des moyens étant prévus pour déten­dre le fil provenant de la canette, lors de chaque formation de point de couture.Sewing machines are already known comprising a needle holder bar and means for imparting it back and forth longitudinal movements, means for fixing a needle on this bar and for feeding the thread thereof. , a loop sensor for gripping the thread brought by the needle and passing it around a bobbin, the thread of which then passes through this loop to form a stitch, a conveyor mechanism for moving the fabric to be sewn from sewing stitch made at the next stitch to be made, means being provided for slackening the thread coming from the bobbin, during each sewing stitch formation.

L'invention a pour objet une machine à coudre du genre précité, dans laquelle d'autres moyens sont prévus pour détendre le fil inférieur, moyens qui permettent d'atteindre une plus grande efficacité avec des moyens plus simples. A cet effet la machine comprend un organe actionné par le mécanisme transporteur pour détendre le fil de la canette lors de chaque cycle du mécanisme transporteur.The subject of the invention is a sewing machine of the aforementioned kind, in which other means are provided for relaxing the lower thread, means which make it possible to achieve greater efficiency with simpler means. To this end, the machine comprises a member actuated by the conveyor mechanism to relax the bobbin thread during each cycle of the conveyor mechanism.

Les dessins annexes représentent schématiquement et à titre d'exemple, une forme d'exécution et une variante de la machine faisant l'objet de l'invention.

  • La figure 1 est une coupe transversale du bras inférieur d'une machine à coudre, montrant une partie du mécanisme transporteur et du capteur de boucle selon cette forme d'exécution.
  • La figure 2 est une coupe partielle de la figure 1, dans laquelle la griffe du transporteur occupe une autre position, selon la ligne II-II de la fig. 3.
  • La figure 3 est une vue du dessus de la griffe du transporteur.
  • La figure 4 est une vue en bout de la griffe.
  • La figure 5 est une coupe sensiblement analogue à la figure 2 et illustre la variante d'exécution.
The accompanying drawings show schematically and by way of example, an embodiment and a variant of the machine which is the subject of the invention.
  • Figure 1 is a cross section of the lower arm of a sewing machine, showing part of the conveyor mechanism and the loop sensor according to this embodiment.
  • Figure 2 is a partial section of Figure 1, in which the carrier's claw occupies another position, along line II-II of FIG. 3.
  • Figure 3 is a top view of the carrier's claw.
  • Figure 4 is an end view of the claw.
  • Figure 5 is a section substantially similar to Figure 2 and illustrates the alternative embodiment.

En référence à la figure 1, le bras inférieur 1 d'une machine à coudre est évidé et contient un capteur de boucle faisant partie d'une cuvette 3 entraînée en rotation par un arbre moteur 4 portant une vis tangente 5 engrenant avec une roue dentée 6 solidaire de la cuvette 3.With reference to FIG. 1, the lower arm 1 of a sewing machine is hollowed out and contains a loop sensor forming part of a bowl 3 driven in rotation by a motor shaft 4 carrying a tangent screw 5 meshing with a toothed wheel 6 secured to the bowl 3.

La cuvette 3 contient une bobine de fil ou canette, non repré­sentée, qui est portée dans une capsule 7, retenue par des moyens bien connus pour ne pas être entraînée en rotation par la cuvette 3.The bowl 3 contains a spool of wire or bobbin, not shown, which is carried in a capsule 7, retained by well-known means so as not to be driven in rotation by the bowl 3.

Le fil 8 provenant de la canette passe sous un ressort de tension 9 pour alimenter la couture 10 des tissus 11.The thread 8 from the bobbin passes under a tension spring 9 to feed the seam 10 of the fabrics 11.

La machine comprend de façon habituelle une barre porte-ai­guille 12 munie d'une aiguille 13, dans le chas de laquelle passe le fil supé­rieur 14. La machine comprend aussi un pied de biche 15 pressé contre le tissu par une tige 16 soumise à l'action d'un ressort non représenté.The machine usually comprises a needle bar 12 provided with a needle 13, through the eye of which the upper thread 14 passes. The machine also comprises a presser foot 15 pressed against the fabric by a rod 16 subjected to the action of a spring not shown.

Les déplacements successifs du tissu pendant la couture sont provoqués par une griffe 17 faisant partie d'un mécanisme transporteur non représenté, car ces mécanismes sont connus depuis fort longtemps dans le domaine.The successive movements of the fabric during sewing are caused by a claw 17 forming part of a transport mechanism, not shown, because these mechanisms have been known for a very long time in the field.

Cette griffe 17 de transport est située sous une plaque-aiguille 18, qui, comme le montre la figure 3, présente des fentes 19, dont une seule est visible au dessin, pour le passage des deux parties dentées 20 de la griffe 17.This transport claw 17 is located under a needle plate 18, which, as shown in FIG. 3, has slots 19, only one of which is visible in the drawing, for the passage of the two toothed parts 20 of the claw 17.

Cette griffe 17 est munie d'un organe destiné à détendre le fil de la canette, lors de chaque cycle du mécanisme transporteur. Cet organe est constitué par un fil d'acier élastique 21 en forme générale de U, dont l'extrémité arrière des branches est recourbée en 22 pour être arrimées dans une partie de la griffe 17.This claw 17 is provided with a member intended to relax the thread of the bobbin during each cycle of the conveyor mechanism. This member is constituted by an elastic steel wire 21 in the general shape of a U, the rear end of the branches of which is curved at 22 to be stowed in a part of the claw 17.

Chacune des branches du U passe dans une perçage d'un patin 23, coulissant dans une branche verticale de la griffe 17. Lors du déplacement de la griffe vers le haut, afin de prendre prise contre les tissus à coudre, chaque patin 23 vient buter sous la plaque-aiguille 18, comme représenté à la figure 1, ce qui déforme vers le bas le fil d'acier 21, qui exerce ainsi une tension sur le fil 8.Each of the branches of the U passes through a hole in a shoe 23, sliding in a vertical branch of the claw 17. When moving the claw upward, in order to take hold against the fabrics to be sewn, each shoe 23 abuts under the needle plate 18, as shown in FIG. 1, which deforms down the steel wire 21, which thus exerts a tension on the wire 8.

Lorsque le mécanisme transporteur déplace la griffe 17 vers le bas, le fil d'acier 21 doit revenir dans sa position initiale et prend la position illustrée dans la figure 2, dans laquelle il n'exerce plus de tension sur le fil inférieur 8.When the conveyor mechanism moves the claw 17 downward, the steel wire 21 must return to its initial position and takes the position illustrated in FIG. 2, in which it no longer exerts tension on the lower wire 8.

Le fil est alors détendu, comme le montre la figure 2, ce qui facilite l'entraînement du fil inférieur à l'intérieur des matériaux à coudre, sous l'effet de la traction exercée par le fil supérieur 14 , ceci quelle que soit la vitesse de couture. Il y a lieu de remarquer, que la longueur du fil qui est détendue à chaque cycle, est fonction de la distance horizon­tale parcourue par la griffe pendant que le fil d'acier 21 agit sur le fil 8. On obtient ainsi un mou qui augmente sensiblement en fonction de la lon­gueur de point choisie.The thread is then relaxed, as shown in FIG. 2, which facilitates the entrainment of the lower thread inside the materials to be sewn, under the effect of the traction exerted by the upper thread 14, this whatever the sewing speed. It should be noted that the length of the thread, which is relaxed in each cycle, is a function of the horizontal distance traveled by the claw while the steel wire 21 acts on the wire 8. This gives a slack which increases substantially depending on the stitch length chosen.

Comme le montrent les figures 3 et 4, la branche transversale 24 du fil d'acier 21 présente une forme coudée qui est destinée à faire varier l'ampleur du mou en fonction de la position latérale du fil 8 dans le cas où la machine est prévue pour effectuer des points zig-zag.As shown in Figures 3 and 4, the transverse branch 24 of the steel wire 21 has a bent shape which is intended to vary the extent of the slack depending on the lateral position of the wire 8 in the case where the machine is scheduled to perform zig-zag stitches.

Il est clair que la forme coudée du fil d'acier doit être adaptée en fonction de la géométrie générale de la machine, notamment de la position de départ du fil inférieur 8 lorsqu'il quitte le patin 9 par rapport à la position de ce fil dans la couture 10.It is clear that the bent shape of the steel wire must be adapted as a function of the general geometry of the machine, in particular the starting position of the lower wire 8 when it leaves the shoe 9 relative to the position of this wire in the seam 10.

De cette façon la déflexion du fil 21 dépend de la position longi­tudinale de la griffe 17 du transporteur et donc par conséquent, de la longueur de points sélectionnée pour la couture.In this way the deflection of the wire 21 depends on the longitudinal position of the claw 17 of the conveyor and therefore therefore, on the length of stitches selected for sewing.

De cette manière il est possible de donner encore davantage de mou au fil inférieur 8, lors d'une couture à grande longueur de point que dans le cas d'une couture à points courts.In this way it is possible to give even more slack to the lower thread 8, when sewing with a long stitch length than in the case of short stitch sewing.

Il est évident qu'un effet analogue pourrait être obtenu en faisant coopérer le fil d'acier, ou organe analogue tel qu'un levier par exemple, avec une butée réglable dont la position serait déterminée par un mécanisme de commande individuel ou associé au dispositif habituel de commande de la longueur du pas d'avance du transporteur.It is obvious that a similar effect could be obtained by making the steel wire, or similar member such as a lever cooperate, with an adjustable stop, the position of which would be determined by an individual control mechanism or associated with the device. usual control of the length of the advance step of the transporter.

Selon une variante d'exécution intéressante, on pourrait obtenir une position oblique de la branche centrale du fil d'acier par rapport au plan horizontal, pour tenir compte des déplacements latéraux de l'aiguille lors d'une couture en zig-zag en prévoyant une différence entre les deux patins, par exemple une différence de distance entre le sommet du patin et le perçage dans lequel le fil 21 passe. Un effet analogue pourrait être obtenu en prévoyant une plaque-aiguille présentant des niveaux d'appui différents pour les deux patins. Ces deux derniers pourraient d'ailleurs être remplacés par une cheville transversale reliant les deux branches parallèles du U.According to an interesting alternative embodiment, one could obtain an oblique position of the central branch of the steel wire relative to the horizontal plane, to take account of the lateral displacements of the needle during a zig-zag stitching by providing a difference between the two pads, for example a difference in distance between the top of the pad and the hole through which the wire 21 passes. A similar effect could be obtained by providing a needle plate having different support levels for the two pads. These last two could also be replaced by a transverse pin connecting the two parallel branches of the U.

Claims (10)

1. Machine à coudre comprenant une barre porte-aiguille et des moyens pour lui imprimer des mouvements longitudinaux de va-et-vient, des moyens de fixation d'une aiguille sur cette barre et d'alimentation en fil de celle-ci, un capteur de boucle pour saisir le fil amené par l'aiguille et le faire passer autour d'une canette dont le fil passe alors dans cette boucle pour former un point de couture, un mécanisme transporteur pour déplacer le tissu à coudre d'un point de couture effectué au point suivant à effectuer, des moyens étant prévus pour détendre le fil inférieur avant la formation de chaque point de couture, caractérisée en ce qu'elle com­prend un organe actionné par le mécanisme transporteur des matériaux à coudre pour détendre le fil provenant de la canette lors de chaque cycle du mécanisme transporteur.1. Sewing machine comprising a needle holder bar and means for printing it back and forth longitudinal movements, means for fixing a needle on this bar and feeding the thread thereof, a loop sensor to grab the thread brought by the needle and pass it around a bobbin whose thread then passes through this loop to form a stitch, a conveyor mechanism to move the fabric to be sewn from a sewing carried out at the next stitch to be made, means being provided for relaxing the lower thread before the formation of each stitch, characterized in that it comprises a member actuated by the mechanism for transporting the materials to be sewn to relax the thread coming from the bobbin during each cycle of the conveyor mechanism. 2. Machine selon la revendication 1, caractérisée en ce que ledit organe est monté sur la griffe du mécanisme transporteur et coopère avec une butée stationnaire lors des déplacements verticaux de la griffe.2. Machine according to claim 1, characterized in that said member is mounted on the claw of the conveyor mechanism and cooperates with a stationary stop during vertical movements of the claw. 3. Machine selon la revendication 2, caractérisée en ce que ledit organe est constitué par un fil d'acier élastique déformable par l'action de la butée.3. Machine according to claim 2, characterized in that said member consists of an elastic steel wire deformable by the action of the stop. 4. Machine selon la revendication 3, caractérisée en ce que le fil d'acier est associé à au moins un patin disposé pour coopérer avec la butée.4. Machine according to claim 3, characterized in that the steel wire is associated with at least one shoe arranged to cooperate with the stop. 5. Machine selon la revendication 3 ou 4, caractérisée en ce que la butée est formée par une rampe s'étendant dans le sens du mouvement du transporteur, de façon à obtenir une déformation élastique du fil d'acier qui soit fonction de la longueur du pas du transporteur.5. Machine according to claim 3 or 4, characterized in that the stop is formed by a ramp extending in the direction of movement of the conveyor, so as to obtain an elastic deformation of the steel wire which is a function of the length of the carrier. 6. Machine selon l'une des revendications 2 à 5, présentant des moyens pour déplacer l'aiguille latéralement, notamment pour effectuer des coutures zig-zag, caractérisée en ce que ledit organe présente une portion s'étendant transversalement par rapport au chemin du fil provenant de la canette, cette portion transversale étant conformée de façon à faire varier la longueur du fil qui est détendu en fonction de la position latérale de l'aiguille.6. Machine according to one of claims 2 to 5, having means for moving the needle laterally, in particular for making zigzag seams, characterized in that said member has a portion extending transversely to the path of the thread coming from the bobbin, this transverse portion being shaped so as to vary the length of the thread which is slackened as a function of the lateral position of the needle. 7. Machine selon l'une des revendications 4 ou 5, présentant des moyens pour déplacer l'aiguille latéralement notamment, pour effectuer des coutures zig-zag, caractérisée en ce que ledit organe présente une portion s'étendant transversalement par rapport au chemin du fil provenant de la canette, des moyens étant prévus pour déformer cette portion transver­salement à chaque cycle de la griffe de transport, de façon à faire varier la longueur du fil qui est détendu, en fonction de la position latérale de l'aiguille.7. Machine according to one of claims 4 or 5, having means for moving the needle laterally in particular, for making zigzag seams, characterized in that said member has a portion extending transversely to the path of the thread coming from the bobbin, means being provided to deform this portion transversely to each cycle of the transport claw, so as to vary the length of the thread which is relaxed, according to the lateral position of the needle. 8. Machine selon l'une des revendications 2 à 6, caractérisée en ce que la butée est constituée par la face inférieure de la plaque-aiguille recouvrant le mécanisme transporteur.8. Machine according to one of claims 2 to 6, characterized in that the stop is formed by the underside of the needle plate covering the conveyor mechanism. 9. Machine selon l'une des revendications 2 à 4 ou 6, caractérisée en ce que la position de la butée est réglable.9. Machine according to one of claims 2 to 4 or 6, characterized in that the position of the stop is adjustable. 10. Machine selon la revendication 9, caractérisée par un mécanisme associé au dispositif de commande habituel de la longueur du pas d'avance du dispositif transporteur, ce mécanisme commandant la position de la butée réglable.10. Machine according to claim 9, characterized by a mechanism associated with the usual control device for the length of the advance step of the conveyor device, this mechanism controlling the position of the adjustable stop.
EP89810885A 1988-11-29 1989-11-20 Sewing machine Expired - Lifetime EP0371922B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4431/88 1988-11-29
CH4431/88A CH676478A5 (en) 1988-11-29 1988-11-29

Publications (2)

Publication Number Publication Date
EP0371922A1 true EP0371922A1 (en) 1990-06-06
EP0371922B1 EP0371922B1 (en) 1993-07-28

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EP89810885A Expired - Lifetime EP0371922B1 (en) 1988-11-29 1989-11-20 Sewing machine

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US (1) US5048438A (en)
EP (1) EP0371922B1 (en)
JP (1) JPH02182289A (en)
KR (1) KR900008095A (en)
CN (1) CN1024207C (en)
AU (1) AU621420B2 (en)
BR (1) BR8906016A (en)
CA (1) CA2004054A1 (en)
CH (1) CH676478A5 (en)
DD (1) DD289783A5 (en)
DE (1) DE68907867T2 (en)
ES (1) ES2042064T3 (en)
PT (1) PT92418B (en)
RU (1) RU1834935C (en)
ZA (1) ZA898422B (en)

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JP4124384B2 (en) 1998-05-15 2008-07-23 富士フイルム株式会社 Magnetic tape cartridge
JP2002177675A (en) * 2000-12-11 2002-06-25 Morimoto Mfg Co Ltd Rubber thread sewing machine
JP3795766B2 (en) * 2001-04-17 2006-07-12 ペガサスミシン製造株式会社 2-needle overlock sewing machine
DE102013111794A1 (en) * 2013-10-25 2015-04-30 Airbus Defence and Space GmbH Repeating unit, multi-needle machine and process for producing reinforced materials

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GB1006150A (en) * 1963-05-14 1965-09-29 Singer Co Bobbin thread pull-off for sewing machines
US4182250A (en) * 1979-02-02 1980-01-08 The Singer Company Bobbin thread control means for a lock stitch sewing machine
DE3023145A1 (en) * 1979-06-20 1981-01-22 Janome Sewing Machine Co Ltd LOCKSTITCH SEWING MACHINE WITH THREAD TENSIONING DEVICE
US4437421A (en) * 1980-11-06 1984-03-20 The Singer Company Variable pull off for bobbin thread
DE3346887A1 (en) * 1982-12-27 1984-06-28 Janome Sewing Machine Co., Ltd., Tokyo DEVICE FOR ADJUSTING THE VOLTAGE OF THE LOWER THREAD FOR A ZIGZAG SEWING MACHINE
US4638751A (en) * 1984-08-31 1987-01-27 Janome Sewing Machine Co., Ltd. Sewing machine with a device for setting thread tension
US4704975A (en) * 1985-05-23 1987-11-10 Janome Sewing Machine Co. Ltd. Upper and lower thread tension devices for sewing machine

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Publication number Priority date Publication date Assignee Title
US3467039A (en) * 1967-11-20 1969-09-16 Singer Co Work feeding mechanisms for sewing machines
US4215639A (en) * 1979-02-02 1980-08-05 The Singer Company Selectively controllable bobbin thread pull-off mechanism
US4399761A (en) * 1981-07-13 1983-08-23 The Singer Company Resilient bobbin thread pull-off member for lockstitch sewing machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1006150A (en) * 1963-05-14 1965-09-29 Singer Co Bobbin thread pull-off for sewing machines
US4182250A (en) * 1979-02-02 1980-01-08 The Singer Company Bobbin thread control means for a lock stitch sewing machine
DE3023145A1 (en) * 1979-06-20 1981-01-22 Janome Sewing Machine Co Ltd LOCKSTITCH SEWING MACHINE WITH THREAD TENSIONING DEVICE
US4437421A (en) * 1980-11-06 1984-03-20 The Singer Company Variable pull off for bobbin thread
DE3346887A1 (en) * 1982-12-27 1984-06-28 Janome Sewing Machine Co., Ltd., Tokyo DEVICE FOR ADJUSTING THE VOLTAGE OF THE LOWER THREAD FOR A ZIGZAG SEWING MACHINE
US4638751A (en) * 1984-08-31 1987-01-27 Janome Sewing Machine Co., Ltd. Sewing machine with a device for setting thread tension
US4704975A (en) * 1985-05-23 1987-11-10 Janome Sewing Machine Co. Ltd. Upper and lower thread tension devices for sewing machine

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ZA898422B (en) 1990-06-27
DD289783A5 (en) 1991-05-08
AU621420B2 (en) 1992-03-12
EP0371922B1 (en) 1993-07-28
ES2042064T3 (en) 1993-12-01
DE68907867T2 (en) 1994-01-27
CH676478A5 (en) 1991-01-31
CN1024207C (en) 1994-04-13
KR900008095A (en) 1990-06-02
CN1043168A (en) 1990-06-20
BR8906016A (en) 1990-06-19
PT92418B (en) 1995-08-09
PT92418A (en) 1990-05-31
CA2004054A1 (en) 1990-05-29
AU4559789A (en) 1990-06-07
US5048438A (en) 1991-09-17
JPH02182289A (en) 1990-07-16
RU1834935C (en) 1993-08-15
DE68907867D1 (en) 1993-09-02

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