EP0049312B1 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
EP0049312B1
EP0049312B1 EP81100441A EP81100441A EP0049312B1 EP 0049312 B1 EP0049312 B1 EP 0049312B1 EP 81100441 A EP81100441 A EP 81100441A EP 81100441 A EP81100441 A EP 81100441A EP 0049312 B1 EP0049312 B1 EP 0049312B1
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EP
European Patent Office
Prior art keywords
needle plate
sewing
presser
machine
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
Application number
EP81100441A
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German (de)
French (fr)
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EP0049312A1 (en
Inventor
Siegfried Dipl.-Ing. Mende
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Kombinat Textima VEB
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Kombinat Textima VEB
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Publication date
Application filed by Kombinat Textima VEB filed Critical Kombinat Textima VEB
Priority to AT81100441T priority Critical patent/ATE10654T1/en
Publication of EP0049312A1 publication Critical patent/EP0049312A1/en
Application granted granted Critical
Publication of EP0049312B1 publication Critical patent/EP0049312B1/en
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • the invention relates to a sewing machine, which is equipped for guiding and transporting the sewing material with a stitch plate attached to a stitch plate receiving bar of a machine bed, a spring-loaded fabric presser arranged above the stitch plate and with a fabric slide located underneath, which temporarily passes through slots in the stitch plate and rises from the level of the latter in order to transport the sewing material.
  • the means provided for this are essentially two springs of different strengths, which give the presser a system with a low degree of persistence on the material to be sewn when the presser is on a flat part of the material, and which press the presser more firmly onto the material if a hem or another obstacle to be overcome.
  • the sewing process is associated with strong vibrations.
  • the invention is now based on the new finding that the known natural vibrations of the needle plate, which arise during the sewing process in particular in the fabric presser / needle plate vibration system, form one of the causes for the material presser lifting off the material to be sewn.
  • a second basis for the present invention consists in the further realization that the time at which the sewing material is at rest on high-speed sewing machines is not sufficient for the free vibrations of the cloth presser and the throat plate to subside.
  • the presser / throat plate vibration system is to be improved in such a way that there are no disturbing overlaps of its free vibrations with the forced vibrations of the presser / slide valve system.
  • the invention characterized in the claims sets itself the task of creating a sewing machine in which the lifting of the presser during the sewing process is further suppressed by the free vibrations of the presser / throat plate system due to a reduction in the natural vibration behavior of the throat plate and a reduction in the spring stiffness of the latter is hindered.
  • This object is achieved in that the part of the throat plate opposite the presser is freely arranged on three sides in a recess in the machine bed and that the throat plate is fastened to the side of the presser on the machine bed by means of its fourth machine-facing side.
  • the presser / throat plate system swings out sooner than is the case if the throat plate lies directly on an uninterrupted throat plate receiving bar, as before, without special precautions.
  • the arrangement and attachment of the throat plate is such that the free vibrations of the material presser / throat plate system have sufficiently subsided due to the reduction in the spring stiffness of the throat plate before the fabric pusher transports the sewing material again and sets the fabric presser in forced vibrations. A disturbing superposition of the mentioned types of vibration does not occur.
  • the sewing machine comprises a needle bar 1 with a clamped sewing needle 2, which can be moved vertically in the usual way.
  • a presser 4 under the pressure of a spring 3 and a cloth pusher 5 also belong to the sewing tools.
  • the material 8 receives its guidance between the presser 4 and a needle plate 7 fastened to a machine bed 6.
  • the stitch plate 7 is provided with slots 7a, which the fabric pusher 5 passes through temporarily in order to rise out of the plane of the stitch plate 7 and to transport the sewing material 8.
  • the slider 5 and the throat plate 7 are accommodated in a recess 9 of the machine bed 6, which is partially delimited by a throat plate receiving bar 6a and also receives a thread gripping device, not shown.
  • a lockstitch or chain stitch sewing machine can form the basis for the invention shown here.
  • the throat plate 7 was fastened in such a way that its natural vibration behavior leads to a reduction in the free vibrations of the presser 4 / throat plate 7 system in that the selected arrangement provides less spring stiffness for the throat
  • Fig. 2 shows such a receptacle for a needle plate 7, in which the needle plate receiving bar 6a on each side of the needle plate 7 between attachment points 10; 11 and a slide plate 12 is provided with an interruption 13.
  • the part of the throat plate 7 opposite the presser 4 receives an arrangement on three sides free in the recess 9 of the machine bed 6, which corresponds to a reduction in the spring stiffness of the throat plate 7 compared to the conventional fixed position of the throat plate.
  • Screws are preferably used as the type of fastening, which hold the throat plate 7 on its fourth machine-facing side to the side of the presser 4 on the machine bed 6.
  • the throat plate 7 was instead of the interruptions 13 with incisions 14; 15 equipped, which are incorporated approximately transversely to the sewing direction in the part of the needle plate 7 opposite the presser 4. It is also possible with this possible solution to make additional interruptions 13 in the throat plate receiving bar 6a.
  • the cloth pusher 5 passes through the slots 7a of the needle plate 7 during the sewing process, thereby pressing against the sewing material 8 in order to transport the same, the cloth pusher 5 sets the cloth presser 4 resting on the sewing material 8 in forced vibrations.
  • the presser 4 is lifted off the throat plate 7.
  • the sewing tools fabric presser 4 and fabric pusher 5 swing together as a system in this phase.
  • the cloth presser 4 hits the stitch plate 7 again, with the sewing material 8 being in between.
  • Free vibrations of the system presser 4 / throat plate 7 begin in this phase, which can be suppressed with the means of the described invention in such a way that the vibrations have subsided sufficiently before the system presser 4 / pusher 5 begins to vibrate again. Thus there is no disruptive superimposition of vibrations of both systems.
  • the interruption 13 of the throat plate receiving bar 6a or the incisions 14; 15 of the throat plate 7 each have different lengths. It is also pertinent to use sewing machines with interruptions 13 and cuts 14; 15 to be provided. Under certain circumstances, a one-sided interruption 13 and / or an incision 14 is also sufficient; 15 to achieve the purpose to be achieved.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Massaging Devices (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

1. Sewing machine comprising a needle plate attached to needle plate receiving ledges of a machine bed for guiding and transporting the material to be sewn, and a pressure bar resiliently mounted above the needle plate, and a feeder disposed therebeneath, said feeder temporarily engaging through slots formed in the needle plate and being elevated out of the plane of the latter so as to transport the material to be sewn, characterized in - that the portion of the needle plate (7) which is opposite to the pressure bar (4) is freely disposed on three sides thereof in a recess (9) of the machine bed (6), and - that the needle plate (7) is secured laterally of the pressure bar (4) to the machine bed (6) by means of its fourth side which faces the machine.

Description

Die Erfindung bezieht sich auf eine Nähmaschine, welche für die Führung und den Transport des Nähgutes mit einer an einer Stichplattenaufnahmeleiste eines Maschinenbettes befestigten Stichplatte, einem über der Stichplatte angeordneten gefederten Stoffdrücker und mit einem darunter befindlichen Stoffschieber ausgestattet ist, der zeitweilig Schlitze der Stichplatte durchgreift und sich aus der Ebene der letzteren erhebt, um das Nähgut zu transportieren.The invention relates to a sewing machine, which is equipped for guiding and transporting the sewing material with a stitch plate attached to a stitch plate receiving bar of a machine bed, a spring-loaded fabric presser arranged above the stitch plate and with a fabric slide located underneath, which temporarily passes through slots in the stitch plate and rises from the level of the latter in order to transport the sewing material.

Es ist eine Nähmaschine gemäss dem Oberbegriff des Patentanspruches 1 bekannt (DE-OS 27 19 539), die mit einer fest und mehrseitig im Maschinenbett aufliegenden Stichplatte versehen ist, bei der der Stoffdrücker doppelt gefedert wurde. Damit wird bezweckt, dass der Stoffdrükker in jeder Nähsituation immer exact der Bewegung des Stoffschiebers folgt, sofern der letztere sich aus der Ebene der Stichplatte erhoben hat. Der Stoffdrücker soll rasch auf den Stoffschieber reagieren und sich nicht vom Nähgut abheben, solange genäht wird. Die dafür vorgesehenen Mittel sind im wesentlichen zwei unterschiedlich starke Federn, die dem Stoffdrücker eine Anlage mit niedrigem Beharrungsvermögen am Nähgut geben, wenn sich der Drücker an einem ebenen Teil des Nähgutes befindet, und die den Stoffdrücker fester auf das Nähgut pressen, sofern ein Saum oder ein anderes Hindernis zu überwinden sind.It is a sewing machine according to the preamble of claim 1 known (DE-OS 27 19 539), which is provided with a fixed and multi-sided in the machine bed needle plate, in which the presser was double-sprung. The purpose of this is that the fabric pusher always exactly follows the movement of the fabric pusher in any sewing situation, provided that the latter has risen from the plane of the needle plate. The fabric presser should react quickly to the fabric pusher and not stand out from the sewing material while sewing. The means provided for this are essentially two springs of different strengths, which give the presser a system with a low degree of persistence on the material to be sewn when the presser is on a flat part of the material, and which press the presser more firmly onto the material if a hem or another obstacle to be overcome.

Wird mit hohen Nähgeschwindigkeiten über 3000 Stiche pro Minute gearbeitet, so liegt der Stoffdrücker der bezeichneten Maschine allerdings trotz der getroffenen technischen Massnahme nicht ständig am Nähgut an, sondern hebt sich zeitweilig von demselben ab. Diese Erscheinung führt zu unerwünschten Stichlängenveränderungen und Nahtverkürzungen. Ausserdem treten bei steigender Nähgeschwindigkeit zunehmend Geräuschbildung und Vibration der gesamten Nähmaschine auf.If you work with high sewing speeds of over 3000 stitches per minute, the fabric presser of the designated machine is not constantly in contact with the sewing material, despite the technical measures taken, but temporarily stands out from it. This phenomenon leads to undesirable changes in stitch length and shortening of the seam. In addition, as the sewing speed increases, noise and vibration of the entire sewing machine occur.

Der Nähvorgang ist bekanntlich mit starken Schwingungen verbunden. Man unterscheidet dabei zwei Schwingungsarten. In der Phase des Transportes des Nähgutes treten erzwungene Schwingungen des Stoffdrückers mit dem Stoffschieber auf. Zur Zeit der Ruhe des Nähgutes schwingt der Stoffdrücker frei zusammen mit der Stichplatte, wobei die Vibration des Bettes der Nähmaschine ebenfalls Einfluss ausübt.As is known, the sewing process is associated with strong vibrations. There are two types of vibration. In the phase of the transport of the sewing material, forced vibrations of the fabric presser with the fabric pusher occur. When the material is at rest, the presser swings freely with the needle plate, whereby the vibration of the bed of the sewing machine also exerts an influence.

Die Erfindung geht nun von der neuen Erkenntnis aus, dass die an sich bekannten Eigenschwingungen der Stichplatte, die während des Nähvorganges insbesondere in dem Schwingungssystem Stoffdrücker/Stichplatte entstehen, eine der Ursachen für das Abheben des Stoffdrückers vom Nähgut bilden.The invention is now based on the new finding that the known natural vibrations of the needle plate, which arise during the sewing process in particular in the fabric presser / needle plate vibration system, form one of the causes for the material presser lifting off the material to be sewn.

Eine zweite Grundlage für die vorliegende Erfindung besteht in der weiteren Erkenntnis, dass die Zeit der Ruhe des Nähgutes an schnellaufenden Nähmaschinen nicht zum genügenden Abklingen der freien Schwingungen des Stoffdrükkers und der Stichplatte ausreicht.A second basis for the present invention consists in the further realization that the time at which the sewing material is at rest on high-speed sewing machines is not sufficient for the free vibrations of the cloth presser and the throat plate to subside.

Folglich überlagern und verstärken sich die erzwungenen und die freien Schwingungen. Der wegen des zwischen dem Stoffdrücker und der Stichplatte geführten Nähgutes vorhandene Dämpfungseffekt vermag die Verstärkung der Überlagerungsschwingungen nicht aufzuhalten.As a result, the forced and free vibrations are superimposed and amplified. The damping effect existing between the presser and the throat plate cannot dampen the amplification of the superimposed vibrations.

Die Schwingungen nehmen infolge der hohen Nähgeschwindigkeit schliesslich beträchtlich zu und begünstigen das Abheben des Stoffdrückers vom Nähgut mit den geschilderten nachteiligen Folgen.The vibrations ultimately increase considerably as a result of the high sewing speed and promote the lifting of the fabric presser from the material to be sewn with the described disadvantageous consequences.

Der Mangel des Abhebens des Stoffdrückers soll eingeschränkt werden.The lack of lifting the presser should be limited.

Zu diesem Zweck ist das Schwingungssystem Stoffdrücker/Stichplatte derart zu verbessern, dass keine störenden Überlagerungen von dessen freien Schwingungen mit den erzwungenen Schwingungen des Systems Stoffdrücker/Stoffschieber eintreten.For this purpose, the presser / throat plate vibration system is to be improved in such a way that there are no disturbing overlaps of its free vibrations with the forced vibrations of the presser / slide valve system.

Die in den Patentansprüchen gekennzeichnete Erfindung stellt sich die Aufgabe, eine Nähmaschine zu schaffen, bei der das Abheben des Stoffdrückers während des Nähvorganges durch eine verstärkte Unterdrückung der freien Schwingungen des Systems Stoffdrücker/Stichplatte aufgrund einer das Eigenschwingungsverhalten der Stichplatte ändernden Verminderung der Federsteife der letzteren weiter behindert wird.The invention characterized in the claims sets itself the task of creating a sewing machine in which the lifting of the presser during the sewing process is further suppressed by the free vibrations of the presser / throat plate system due to a reduction in the natural vibration behavior of the throat plate and a reduction in the spring stiffness of the latter is hindered.

Gelöst wird diese Aufgabe dadurch, dass der dem Stoffdrücker gegenüberliegende Teil der Stichplatte an drei Seiten frei in einer Ausnehmung des Maschinenbettes angeordnet ist und dass die Stichplatte mittels ihrer vierten maschinenzugewandten Seite seitlich des Stoffdrückers am Maschinenbett befestigt ist.This object is achieved in that the part of the throat plate opposite the presser is freely arranged on three sides in a recess in the machine bed and that the throat plate is fastened to the side of the presser on the machine bed by means of its fourth machine-facing side.

Da die Stichplatte im Stoffdrückerbereich frei angeordnet wurde, was besonders vorteilhaft mit der Ausführungsart nach Patentanspruch 2 geschieht, schwingt das System Stoffdrücker/ Stichplatte eher aus als das der Fall ist, wenn die Stichplatte wie bisher ohne spezielle Vorkehrungen direkt auf einer ununterbrochenen Stichplattenaufnahmeleiste liegt. Die Anordnung und Befestigung der Stichplatte ist so vorgesehen, dass die freien Schwingungen des Systems Stoffdrükker/Stichplatte infolge Verminderung der Federsteife der Stichplatte jeweils ausreichend abgeklungen sind, bevor der Stoffschieber das Nähgut erneut transportiert und den Stoffdrücker in erzwungene Schwingungen versetzt. Eine störende Überlagerung der genannten Schwingungsarten tritt also nicht ein.Since the throat plate was freely arranged in the presser area, which is particularly advantageous with the embodiment according to claim 2, the presser / throat plate system swings out sooner than is the case if the throat plate lies directly on an uninterrupted throat plate receiving bar, as before, without special precautions. The arrangement and attachment of the throat plate is such that the free vibrations of the material presser / throat plate system have sufficiently subsided due to the reduction in the spring stiffness of the throat plate before the fabric pusher transports the sewing material again and sets the fabric presser in forced vibrations. A disturbing superposition of the mentioned types of vibration does not occur.

Aufgrund dessen kann die Erscheinung des Abhebens des Stoffdrückers vom Nähgut während des Nähvorganges in einem beachtlichen Umfang vermieden werden.Because of this, the appearance of the presser lifting off the material to be sewn during the sewing process can be avoided to a considerable extent.

Die Erfindung wird anhand von Ausführungsbeispielen näher erläutert.The invention is explained in more detail using exemplary embodiments.

Die Zeichnung zeigt in:

  • Fig. 1: einen Querschnitt durch die Nähstelle einer Nähmaschine,
  • Fig. 2 eine perspektivische Ansicht einer Aufnahme für eine Stichplatte und eine Schieberplatte und
  • Fig. 3: eine Draufsicht auf eine Stichplatte und eine Schieberplatte.
The drawing shows in:
  • 1 shows a cross section through the sewing point of a sewing machine,
  • Fig. 2 is a perspective view of a receptacle for a needle plate and a slide plate and
  • Fig. 3: a plan view of a needle plate and a slide plate.

Gemäss Fig. 1 umfasst die Nähmaschine eine Nadelstange 1 mit einer eingespannten Nähnadel 2, die in üblicher Weise vertikal bewegbar ist. Weiter gehören ein unter dem Druck einer Feder 3 stehender Stoffdrücker 4 und ein Stoffschieber 5 zu den Nähwerkzeugen. Zwischen dem Stoffdrücker 4 und einer an einem Maschinenbett 6 befestigten Stichplatte 7 erhält das Nähgut 8 seine Führung. Die Stichplatte 7 ist mit Schlitzen 7a ausgestattet, die der Stoffschieber 5 zeitweilig durchgreift, um sich aus der Ebene der Stichplatte 7 zu erheben und das Nähgut 8 zu transportieren. Der Stoffschieber 5 und die Stichplatte 7 sind in einer Ausnehmung 9 des Maschinenbettes 6 untergebracht, die teilweise von einer Stichplattenaufnahmeleiste 6a begrenzt wird und ausserdem noch eine nicht gezeigte Fadengreifervorrichtung aufnimmt. Für die hierin dargestellte Erfindung kann eine Steppstich- oder eine Kettenstichnähmaschine zugrunde liegen. Die Stichplatte 7 wurde derart befestigt, dass ihr Eigenschwingungsverhalten zu einer Reduzierung der freien Schwingungen des Systems Stoffdrücker 4/ Stichplatte 7 führt, indem durch die gewählte Anordnung eine geringere Federsteife der Stichplatte 7 vorliegt.1, the sewing machine comprises a needle bar 1 with a clamped sewing needle 2, which can be moved vertically in the usual way. A presser 4 under the pressure of a spring 3 and a cloth pusher 5 also belong to the sewing tools. The material 8 receives its guidance between the presser 4 and a needle plate 7 fastened to a machine bed 6. The stitch plate 7 is provided with slots 7a, which the fabric pusher 5 passes through temporarily in order to rise out of the plane of the stitch plate 7 and to transport the sewing material 8. The slider 5 and the throat plate 7 are accommodated in a recess 9 of the machine bed 6, which is partially delimited by a throat plate receiving bar 6a and also receives a thread gripping device, not shown. A lockstitch or chain stitch sewing machine can form the basis for the invention shown here. The throat plate 7 was fastened in such a way that its natural vibration behavior leads to a reduction in the free vibrations of the presser 4 / throat plate 7 system in that the selected arrangement provides less spring stiffness for the throat plate 7.

Fig. 2 stellt eine solche Aufnahme für eine Stichplatte 7 dar, bei der die Stichplattenaufnahmeleiste 6a auf jeder Seite der Stichplatte 7 zwischen Befestigungsstellen 10; 11 und einer Schieberplatte 12 mit einer Unterbrechung 13 versehen ist. Somit erhält der dem Stoffdrücker 4 gegenüberliegende Teil der Stichplatte 7 eine an drei Seiten freie Anordnung in der Ausnehmung 9 des Maschinenbettes 6, die gegenüber der herkömmlichen festen Lage der Stichplatte einer Verminderung der Federsteife der Stichplatte 7 entspricht. Als Befestigungsart kommen vorzugsweise Verschraubungen in Betracht, die die Stichplatte 7 an ihrer vierten maschinenzugewandten Seite seitlich des Stoffdrückers 4 am Maschinenbett 6 festhalten.Fig. 2 shows such a receptacle for a needle plate 7, in which the needle plate receiving bar 6a on each side of the needle plate 7 between attachment points 10; 11 and a slide plate 12 is provided with an interruption 13. Thus, the part of the throat plate 7 opposite the presser 4 receives an arrangement on three sides free in the recess 9 of the machine bed 6, which corresponds to a reduction in the spring stiffness of the throat plate 7 compared to the conventional fixed position of the throat plate. Screws are preferably used as the type of fastening, which hold the throat plate 7 on its fourth machine-facing side to the side of the presser 4 on the machine bed 6.

In Fig. 3 wurde die Stichplatte 7 statt der Unterbrechungen 13 mit Einschnitten 14; 15 ausgestattet, welche annähernd quer zur Nährichtung in dem dem Stoffdrücker 4 gegenüber liegenden Teil der Stichplatte 7 eingearbeitet sind. Weiter geht es bei dieser Lösungsmöglichkeit auch an, zusätzliche Unterbrechungen 13 der Stichplattenaufnahmeleiste 6a vorzunehmen.In Fig. 3, the throat plate 7 was instead of the interruptions 13 with incisions 14; 15 equipped, which are incorporated approximately transversely to the sewing direction in the part of the needle plate 7 opposite the presser 4. It is also possible with this possible solution to make additional interruptions 13 in the throat plate receiving bar 6a.

Wenn nun der Stoffschieber 5 während des Nähvorganges die Schlitze 7a der Stichplatte 7 durchgreift, dabei gegen das Nähgut 8 drückt, um dasselbe zu transportieren, versetzt der Stoffschieber 5 den am Nähgut 8 anliegenden Stoffdrücker 4 in erzwungene Schwingungen. Der Stoffdrücker 4 wird dabei von der Stichplatte 7 abgehoben. Die Nähwerkzeuge Stoffdrücker 4 und Stoffschieber 5 schwingen in dieser Phase gemeinsam als System. Hat der Stoffschieber 5 den Transport des Nähgutes 8 beendet und wieder eine Stellung unterhalb der Ebene der Stichplatte 7 eingenommen, so trifft der Stoffdrücker 4 erneut auf die Stichplatte 7, wobei sich das Nähgut 8 dazwischen befindet. Es beginnen in dieser Phase freie Schwingungen des Systems Stoffdrücker 4/Stichplatte 7, welche mit den Mitteln der beschriebenen Erfindung derart unterdrückbar sind, dass die Schwingungen genügend abgeklungen sind, bevor das System Stoffdrücker 4/Stoffschieber 5 - abermals erzwungen zu schwingen anfängt. Somit entsteht keine störende Überlagerung von Schwingungen beider Systeme.If now the cloth pusher 5 passes through the slots 7a of the needle plate 7 during the sewing process, thereby pressing against the sewing material 8 in order to transport the same, the cloth pusher 5 sets the cloth presser 4 resting on the sewing material 8 in forced vibrations. The presser 4 is lifted off the throat plate 7. The sewing tools fabric presser 4 and fabric pusher 5 swing together as a system in this phase. When the cloth pusher 5 has finished transporting the sewing material 8 and has once again assumed a position below the level of the stitch plate 7, the cloth presser 4 hits the stitch plate 7 again, with the sewing material 8 being in between. Free vibrations of the system presser 4 / throat plate 7 begin in this phase, which can be suppressed with the means of the described invention in such a way that the vibrations have subsided sufficiently before the system presser 4 / pusher 5 begins to vibrate again. Thus there is no disruptive superimposition of vibrations of both systems.

Das Vermeiden einer störenden Schwingungs- überlagerung schafft weiterhin einen definierten Ausgangszustand des Systems Stoffdrücker 4/ Stoffschieber 5, der es gestattet, die notwendige Anlegekraft des Stoffdrückers 4 an der Stichplatte 7 und am Stoffschieber 5 wirkungsvoller einstellen zu können als bisher.The avoidance of a disturbing vibration superimposition creates a defined initial state of the system presser 4 / slide 5, which allows the necessary force of the presser 4 on the needle plate 7 and on the slide 5 to be set more effectively than before.

Form und Abmessung der einseitig befestigten Stichplatte 7 richten sich natürlich nach den auftretenden bzw. gewünschten Schwingungsverhältnissen. Beispielsweise kann man die beiderseitige Unterbrechung 13 der Stichplattenaufnahmeleiste 6a oder die Einschnitte 14; 15 der Stichplatte 7 jeweils verschieden lang ausführen. Es ist auch angängig, die Nähmaschine sowohl mit Unterbrechungen 13 als auch mit Einschnitten 14; 15 zu versehen. Unter Umständen genügt auch eine einseitige Unterbrechung 13 und/oder ein Einschnitt 14; 15, um den zu erreichenden Zweck zu verwirklichen.The shape and dimensions of the throat plate 7, which is fastened on one side, naturally depend on the occurring or desired vibration conditions. For example, the interruption 13 of the throat plate receiving bar 6a or the incisions 14; 15 of the throat plate 7 each have different lengths. It is also pertinent to use sewing machines with interruptions 13 and cuts 14; 15 to be provided. Under certain circumstances, a one-sided interruption 13 and / or an incision 14 is also sufficient; 15 to achieve the purpose to be achieved.

Claims (3)

1. Sewing machine comprising a needle plate attached to needle plate receiving ledges of a machine bed for guiding and transporting the material to be sewn, and a pressure bar resiliently mounted above the needle plate, and a feeder disposed therebeneath, said feeder temporarily engaging through slots formed in the needle plate and being elevated out of the plane of the latter so as to transport the material to be sewn, characterized in
- that the portion of the needle plate (7) which is opposite to the pressure bar (4) is freely disposed on three sides thereof in a recess (9) of the machine bed (6), and
- that the needle plate (7) is secured laterally of the pressure bar (4) to the machine bed (6) by means of its fourth side which faces the machine.
2. Sewing machine as claimed in claim 1, characterized in that the needle plate receiving ledges (6a) are provided with interruptions (13) on either side of the needle plate (7) between mounting locations (10; 11) and a sliding plate (12).
3. Sewing machine as claimed in claim 1, characterized in that two cut-outs (14; 15) are formed approximately transversely to the sewing direction in the portion of the needle plate (7) opposed to the pressure bar (4).
EP81100441A 1980-10-03 1981-01-22 Sewing machine Expired EP0049312B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100441T ATE10654T1 (en) 1980-10-03 1981-01-22 SEWING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD80224305A DD153401A1 (en) 1980-10-03 1980-10-03 SEWING MACHINE
DD224305 1980-10-03

Publications (2)

Publication Number Publication Date
EP0049312A1 EP0049312A1 (en) 1982-04-14
EP0049312B1 true EP0049312B1 (en) 1984-12-05

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Application Number Title Priority Date Filing Date
EP81100441A Expired EP0049312B1 (en) 1980-10-03 1981-01-22 Sewing machine

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EP (1) EP0049312B1 (en)
AT (1) ATE10654T1 (en)
DD (1) DD153401A1 (en)
DE (1) DE3167520D1 (en)

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Publication number Priority date Publication date Assignee Title
RU2673886C1 (en) * 2015-06-30 2018-12-03 Дзе Проктер Энд Гэмбл Компани Cleaning method of polluted polymers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500731A (en) * 1945-09-25 1950-03-14 Singer Mfg Co Throat plate for sewing machines
DE885194C (en) * 1950-09-14 1953-08-03 Union Special Machine Co Sewing machine
US2703543A (en) * 1953-02-06 1955-03-08 Emma D Needs Sewing machine construction
US3221688A (en) * 1962-04-12 1965-12-07 Rimoldi C Spa Virginio Overlock sewing machine
US3373709A (en) * 1965-12-23 1968-03-19 Singer Co Sewing machine throat plate locating and securing means
FR90496E (en) * 1966-07-27 1967-12-22 Rhodiaceta Method and apparatus for sewing flat elements such as in particular fabrics or sheets

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Publication number Publication date
DE3167520D1 (en) 1985-01-17
ATE10654T1 (en) 1984-12-15
DD153401A1 (en) 1982-01-06
EP0049312A1 (en) 1982-04-14

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