EP0370526B1 - Device for cutting strips of sewing material - Google Patents
Device for cutting strips of sewing material Download PDFInfo
- Publication number
- EP0370526B1 EP0370526B1 EP89121761A EP89121761A EP0370526B1 EP 0370526 B1 EP0370526 B1 EP 0370526B1 EP 89121761 A EP89121761 A EP 89121761A EP 89121761 A EP89121761 A EP 89121761A EP 0370526 B1 EP0370526 B1 EP 0370526B1
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- EP
- European Patent Office
- Prior art keywords
- cutter plate
- cutting
- edge
- cutter
- plates
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
- D05B37/06—Cutting devices with oscillating tools
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8821—With simple rectilinear reciprocating motion only
Definitions
- the invention relates to a device for cutting band-shaped sewing material on a sewing machine, by means of scissors interacting, power-operated knives, with two knife plates, which are each formed with two knife edges and can be pressed against one another on a holder and at the same time are arranged in a mutually oppositely linear manner.
- Devices for cutting band-shaped sewing material on a sewing machine are known, which are based on the principle of scissors and in which a cutting edge can be pivoted about a fixed axis of rotation. Cutting strips made of materials that are difficult to cut, such as rubber, with the help of such scissors is difficult because of the instability of the pivotable cutting edge, which increases with the distance from the axis of rotation, and is often not possible. This instability generally represents a severe restriction on the securely cut through width of a band-shaped sewing material.
- the stationary knife plate has a rectangular opening, two cutters being formed by its horizontal lower edge and its horizontal upper edge.
- the sliding knife plate has an oblique double cutting edge.
- the object of the invention is to provide a generic device which avoids the disadvantages of the known scissors and by means of which even difficult-to-cut strip materials can be cut.
- the device according to the invention is characterized in that the two cutter plates each have, at the upper end, viewed in the operating position, a beak-like extension separated from their base part by a trapezoidal incision, with one cutter plate having the inclined lower edge of the beak-like one Approach and the opposite horizontal edge of the trapezoidal incision of this knife plate is each designed as a cutting edge, while the other knife plate each has a cutting edge both on the horizontal upper edge and on the sloping lower edge of its beak-like extension.
- the double-edged cutter plates which interact with one another in the manner of a "guillotine", permit each cutting movement to be carried out with each relative movement, irrespective of the direction of movement, and thus to double the working speed of the cutting device compared to known, relevant apparatuses. Due to the greatly increased stability of the cutting device, it is also possible to cut bard-shaped sewing material made of material that can be cut and / or with a considerably larger width. By forming two knife edges per knife plate, a double service life of the cutting device can also be achieved, which means a significant advantage in terms of maintenance by sharpening the knife edges.
- the cutting device according to the invention also represents a space-saving solution with regard to the attachment to a sewing machine.
- the cutting device shown in FIG. 1 has two cutter plates 1 and 2 with essentially the same size. These are each formed with two knife edges 1.1, 1.2 and 2.1, 2.2 and can be pressed against one another on a holder 3 and, at the same time, are arranged so as to be linearly displaceable in relation to one another (cf. also FIGS. 2 and 3). They have an essentially square shape. Their arrangement on the holder 3 is such that after they are attached to a sewing machine N they assume a vertical position and at the same time are positioned transversely to the material feed, the direction of which is indicated by the arrow B (see FIG. 1).
- the knife plates 1, 2 also have at their upper end, seen in said operating position, a beak-like attachment 1.3, 2.3, each of which is separated from the base part 1.5, 2.5 by a trapezoidal cut 1.4, 2.4 in the knife plates 1, 2 .
- the two knife edges 1.1, 1.2 of the one knife plate 1 are formed on the inclined lower edge of its beak-like attachment 1.3 and the horizontal edge thereof opposite the trapezoidal cut 1.4 thereof.
- the two cutter edges 2.1, 2.2 are located on the horizontal upper and the inclined lower edge of their beak-like attachment 2.3. 2, the cutting edge 1.2 of the cutting tip 1 is covered by the cutting edge 2.1 of the cutting tip 2.
- the holder 3 of the cutting device is composed of a carrier 3.1 receiving the knife plates 1, 2, a carrier 3.1 fastened to the latter and actuating one of the two knife plates 1, 2, namely the displaceable knife plate 2, and a holding plate 3.3 (cf. . 1) together.
- Carrier 3.1 and drive 3.2 are anchored in place on the holding plate 3.3 and can be attached to a sewing machine N.
- a pressure cylinder can expediently be used as the drive 3.2.
- drives of a different type could also be used.
- the assignment of the two knife plates 1, 2 to one another is made such that when the movable knife plate 2 is lifted upwards, the cutting edge 2.1 on the horizontal upper edge of its beak-like attachment 2.3 each with the cutting edge 1.1 on the sloping lower edge of the beak-like extension 1.3 of the stationary knife plate 1 and during the downward stroke of the movable knife plate 2 Cutting edge 2.2 on the sloping lower edge of its beak-like attachment 2.3 each interacts with the cutting edge 1.2 on the horizontal edge of the trapezoidal incision 1.4 of the stationary cutter plate 1 (cf. in particular FIGS. 2 and 3).
- the movable knife plate 2 is illustrated in its lower end position.
- a nut screw 4 with a resilient washer 4.1 is provided on the surface of the displaceable knife plate 2 facing away from the stationary knife plate 1 (cf. FIG. 2). It interacts to adjust the cutting pressure during the cutting process with one end of a screw bolt 4.2 passing through the two cutter plates 1, 2, the other end of which is displaceably guided in the fixed cutter plate 1 simultaneously with the respective cutting process.
- FIG 1 also schematically illustrates the presser foot F of an overlocking sewing machine N for holding down the material to be processed and contours of other parts of the same sewing machine-N for the purpose of better understanding the invention.
- a pneumatic pressure line 6 can be laid particularly advantageously on the side of the fixed knife plate 1 facing away from the displaceable knife plate 2, which has at least one nozzle 6.1 fastened in the vicinity of the trapezoidal cut 1.4 of said knife plate 1 supplied with compressed air.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Schneiden bandförmigen Nähguts an einer Nähmaschine, mittels scherenartig zusammenwirkender, kraftbetätigbarer Messer, mit zwei Messerplatten, die je mit zwei Messerschneiden ausgebildet und an einer Halterung gegeneinander preßbar und gleichzeitig in bezug aufeinander gegenläufig linear verschiebbar angeordnet sind.The invention relates to a device for cutting band-shaped sewing material on a sewing machine, by means of scissors interacting, power-operated knives, with two knife plates, which are each formed with two knife edges and can be pressed against one another on a holder and at the same time are arranged in a mutually oppositely linear manner.
Es sind Vorrichtungen zum Schneiden von bandförmigem Nähgut an einer Nähmaschine bekannt, die auf dem Prinzip der Schere basieren und bei denen eine Schneide um eine feste Drehachse schwenkbar ist. Das Durchtrennen von Bändern aus schwer schneidbaren Materialien, wie beispielsweise Gummi, mit Hilfe einer solchen Schere ist wegen der mit dem Abstand von der Drehachse zunehmenden Instabilität der schwenkbaren Schneide mit Schwierigkeiten verbunden und vielfach nicht möglich. Diese Instabilität stellt allgemein eine starke Einschränkung der sicher durchschneidbaren Breite eines bandförmigen Nähguts dar.Devices for cutting band-shaped sewing material on a sewing machine are known, which are based on the principle of scissors and in which a cutting edge can be pivoted about a fixed axis of rotation. Cutting strips made of materials that are difficult to cut, such as rubber, with the help of such scissors is difficult because of the instability of the pivotable cutting edge, which increases with the distance from the axis of rotation, and is often not possible. This instability generally represents a severe restriction on the securely cut through width of a band-shaped sewing material.
Aus dem Dokument DE-A1-34 26 283 ist eine Vorrichtung der eingangs genannten Art bekannt. Bei dieser Vorrichtung weist die stationäre Messerplatte eine rechteckige Öffnung auf, wobei durch deren waagerechte Unterkante und deren waagerechte Oberkante zwei Schneiden gebildet sind. Die verschiebbare Messerplatte weist eine schräg verlaufende Doppelschneide auf. Beim Aufwärtshub der verschiebbaren Messerplatte schneidet deren Oberkante mit der Oberkante der Öffnung der stationären Messerplatte, und beim Abwärtshub der verschiebbaren Messerplatte schneidet deren Unterkante mit der Unterkante der Öffnung der stationären Messerplatte. Mit dieser Vorrichtung kann nur bandförmiges Nähgut geschnitten werden, welches durch die Öffnung hindurchpaßt.From the document DE-A1-34 26 283 a device of the type mentioned is known. In this device, the stationary knife plate has a rectangular opening, two cutters being formed by its horizontal lower edge and its horizontal upper edge. The sliding knife plate has an oblique double cutting edge. During the upward stroke of the displaceable knife plate, its upper edge intersects with the upper edge of the opening of the stationary knife plate, and during the downward stroke of the displaceable knife plate, its lower edge intersects with the lower edge of the opening of the stationary knife plate. This device can only be used to cut tape-like material that fits through the opening.
Aufgabe der Erfindung ist die Schaffung einer gattungsgemäßen Vorrichtung, welche die Nachteile der bekannten Scheren vermeidet und mit deren Hilfe auch schwer schneidbare Bandmaterialien durchtrennbar sind.The object of the invention is to provide a generic device which avoids the disadvantages of the known scissors and by means of which even difficult-to-cut strip materials can be cut.
Zur Lösung dieser Aufgabe ist die Vorrichtung erfindungsgemäß dadurch gekennzeichnet, daß die beiden Messerplatten an ihrem, in der Betriebslage betrachtet, oberen Ende je einen durch einen trapezförmigen Einschnitt von deren Basisteil getrennten, schnabelartigen Ansatz aufweisen, wobei bei der einen Messerplatte die schrägverlaufende Unterkante des schnabelartigen Ansatzes und die dieser gegenüberliegende horizontale Kante des trapezförmigen Einschnittes dieser Messerplatte je als eine Schneide ausgebildet ist, während die andere Messerplatte sowohl an der horizontalen Oberkante als auch an der schrägverlaufenden Unterkante ihres schnabelartigen Ansatzes je eine Schneide aufweist.To achieve this object, the device according to the invention is characterized in that the two cutter plates each have, at the upper end, viewed in the operating position, a beak-like extension separated from their base part by a trapezoidal incision, with one cutter plate having the inclined lower edge of the beak-like one Approach and the opposite horizontal edge of the trapezoidal incision of this knife plate is each designed as a cutting edge, while the other knife plate each has a cutting edge both on the horizontal upper edge and on the sloping lower edge of its beak-like extension.
Die nach Art eines "guillotine" miteinander zusammenwirkenden, doppelschneidigen Messerplatten gestatten bei einer jeden Relativbewegung derselben, ungeachtet der Bewegungsrichtung, jeweils den Vollzug eines Schneidvorgangs und damit eine Verdoppelung der Arbeitsgeschwindigkeit der Schneidvorrichtung gegenüber bekannten, einschlägigen Apparaten. Wegen der gleichzeitig stark erhöhten Stabilität der Schneidvorrichtung wird auch ein Durchtrennen bardförmigen Nähgutes aus schwerschneidbarem Material und/oder mit einer erheblich grösseren Breite möglich. Durch die Ausbildung zweier Messerschneiden je Messerplatte lässt sich auch eine doppelte Standzeit der Schneidvorrichtung erzielen, welcher Umstand hinsichtlich des Unterhaltes durch Schärfen der Messerschneiden einen wesentlichen Vorteil bedeutet. Die erfindungsgemäss beschaffene Schneidvorrichtung stellt auch hinsichtlich des Anbaues an eine Nähmaschine eine platzsparende Lösung dar.The double-edged cutter plates, which interact with one another in the manner of a "guillotine", permit each cutting movement to be carried out with each relative movement, irrespective of the direction of movement, and thus to double the working speed of the cutting device compared to known, relevant apparatuses. Due to the greatly increased stability of the cutting device, it is also possible to cut bard-shaped sewing material made of material that can be cut and / or with a considerably larger width. By forming two knife edges per knife plate, a double service life of the cutting device can also be achieved, which means a significant advantage in terms of maintenance by sharpening the knife edges. The cutting device according to the invention also represents a space-saving solution with regard to the attachment to a sewing machine.
Merkmale einer besonders vorteilhaften Weiterausbildung der Erfindung ergeben sich aus den abhängigen Patentansprüchen 2 bis 9. So lässt sich insbesondere den Patentansprüchen 5 bis 7 entnehmen, dass die Mittel zum Gegeneinanderpressen der beiden Messerplatten mit der einen derselben, nämlich der verschiebbaren Messerplatte, mitbeweglich sind. Es kann dadurch beim Schneidvorgang im Gegensatz zu den bekannten Scheren längs der vollen Bandbreite ein gleichbleibender Schneiddruck erzeugt werden.Features of a particularly advantageous further development of the invention result from the
Da zudem die Messerplatten über Rollen gegeneinander abgestützt sind, wird bei ihrer Relativverschiebung im Vergleich zur zwischen den Schneiden bekannter Schneidvorrichtungen auftretenden, starken Gleitreibung lediglich eine weniger Energie verzehrende Rollreibung hervorgerufen.Since, in addition, the knife plates are supported against one another via rollers, their relative displacement compared to the strong sliding friction occurring between the cutting edges of known cutting devices only causes a less energy-consuming roller friction.
Die Erfindung wird beispielsweise anhand einer bevorzugten Ausführungsform gemäss der Zeichnung näher erläutert.The invention is explained in more detail, for example, using a preferred embodiment according to the drawing.
Es zeigen:
- Fig. 1:
- Schematische Darstellung einer Vorrichtung gemäss der Erfindung zum Schneiden bandförmigen Nähgutes an einer teilweise angedeuteten Nähmaschine zum Ueberwendlichnähen in Seitenansicht:
- Fig. 2:
- Ansicht der beiden Messerplatten der Schneidvorrichtung nach Fig. 1 in der dem Nähgutvorschub entgegengesetzten Blickrichtung und
- Fig. 3:
- Ansicht der beiden Messerplatten der Schneidvorrichtung gemäss Fig. 1 in Richtung des Nähgutvorschubes.
- Fig. 1:
- Schematic representation of a device according to the invention for cutting band-shaped sewing material on a partially indicated sewing machine for over-sewing in a side view:
- Fig. 2:
- View of the two cutter plates of the cutting device according to FIG. 1 in the viewing direction opposite the material feed and
- Fig. 3:
- View of the two cutter plates of the cutting device according to FIG. 1 in the direction of the material feed.
Die in der Fig. 1 dargestellte Schneidvorrichtung weist zwei Messerplatten 1 und 2 mit im wesentlichen gleicher Größe auf. Diese sind je mit zwei Messerschneiden 1.1, 1.2 und 2.1, 2.2 ausgebildet und an einer Halterung 3 gegeneinander pressbar und zugleich in bezug aufeinander gegenläufig linear verschiebbar angeordnet (vgl. auch Fig. 2 und 3). Sie haben eine im wesentlichen viereckige Gestalt. Ihre Anordnung an der Halterung 3 ist derart getroffen, dass sie nach deren Befestigung an einer Nähmaschine N eine Vertikallage einnehmen und gleichzeitig quer zum Nähgutvorschub positioniert sind, dessen Richtung mit dem Pfeil B angegeben ist (vgl. Fig. 1).The cutting device shown in FIG. 1 has two
Die Messerplatten 1, 2 weisen ferner an ihrem, in der besagten Betriebslage gesehen, oberen Ende je einen schnabelartigen Ansatz 1.3, 2.3 auf, der jeweils durch einen trapezförmigen Einschnitt 1.4, 2.4 in die Messerplatten 1, 2 von deren Basisteil 1.5, 2.5 getrennt ist. Die beiden Messerschneiden 1.1, 1.2 der einen Messerplatte 1 sind an der schrägverlaufenden Unterkante von deren schnabelartigem Ansatz 1.3 und der dieser gegenüberliegenden horizontalen Kante des trapezförmigen Einschnittes 1.4 derselben ausgebildet. Bei der anderen Messerplatte 2 befinden sich die beiden Messerschneiden 2.1, 2.2 an der horizontalen Ober-und der schrägverlaufenden Unterkante von deren schnabelartigem Ansatz 2.3. In der Fig. 2 wird die Schneide 1.2 der Messerplatte 1 durch die Schneide 2.1 der Messerplatte 2 überdeckt.The
Die Halterung 3 der Schneidvorrichtung setzt sich aus einem die Messerplatten 1, 2 aufnehmenden Träger 3.1, einem an diesem befestigten, die eine der beiden Messerplatten 1, 2, nämlich die verschiebbare Messerplatte 2, betätigenden Antrieb 3.2 und aus einer Halteplatte 3.3 (vgl. Fig. 1) zusammen. An der Halteplatte 3.3 sind Träger 3.1 und Antrieb 3.2 ortsfest verankert und sie ist an eine Nähmaschine N anbaubar. Zweckmässig kann ein Druckzylinder als der Antrieb 3.2 eingesetzt sein. Es wären jedoch auch Antriebe anderer Art verwendbar.The
Die Zuordnung der beiden Messerplatten 1, 2 zueinander ist so getroffen, dass beim Aufwärtshub der verschiebbaren Messerplatte 2 die Schneide 2.1 an der horizontalen Oberkante von deren schnabelartigem Ansatz 2.3 jeweils mit der Schneide 1.1 an der schrägverlaufenden Unterkante des schnabelartigen Ansatzes 1.3 der ortsfesten Messerplatte 1 und beim Abwärtshub der verschiebbaren Messerplatte 2 die Schneide 2.2 an der schrägverlaufenden Unterkante von deren schnabelartigem Ansatz 2.3 jeweils mit der Schneide 1.2 an der horizontalen Kante des trapezförmigen Einschnittes 1.4 der ortsfesten Messerplatte 1 zusammenwirkt (vgl. insbesondere Fig. 2 und 3). In der Zeichnung ist die verschiebbare Messerplatte 2 in ihrer unteren Endlage veranschaulicht.The assignment of the two
Zum Gegeneinanderpressen der beiden Messerplatten 1, 2 beim Schneidvorgang ist an der der ortsfesten Messerplatte 1 abgewandten Fläche der verschiebbaren Messerplatte 2 eine Mutterschraube 4 mit einer federnden Unterlagscheibe 4.1 vorgesehen (vgl. Fig. 2). Sie wirkt zur Einstellung des Schneiddruckes beim Schneidvorgang mit dem einen Ende eines die beiden Messerplatten 1, 2 durchsetzenden Schraubenbolzens 4.2 zusammen, dessen anderes Ende in der ortsfesten Messerplatte 1 gleichzeitig mit dem jeweiligen Schneidvorgang verschiebbar geführt ist. Hierzu ist an der der verschiebbaren Messerplatte 2 abgewandten Fläche der ortsfesten Messerplatte 1 eine nicht durchgehende, fensterartige Ausnehmung 1.6 mit in der Betriebslage der Schneidvorrichtung senkrecht verlaufenden Längsseiten 1.6.1 und einem in der Mitte von deren Boden 1.6.2 parallel zu den Längsseiten 1.6.1 durchgebrochenen Schlitz 1.6.3 für den den Schneiddruck erzeugenden Schraubenbolzen 4.2 und einen weiteren Bolzen 3.2.2 ausgebildet. Der letztere bildet einen Teil der Betätigungsverbindung 3.2.1 der verschiebbaren Messerplatte 2 mit deren Antrieb 3.2 (vgl. insbesondere Fig. 1). Wie ferner der Fig. 3 entnehmbar, sind dann die besagten beiden Bolzen 4.2 und 3.2.2 in einem Schlitten 5 festgeschraubt, der zusammen mit der verschiebbaren Messerplatte 2 bewegbar und dabei anhand von vier Rollen 5.1 am Boden 1.6.2 der fensterartigen Ausnehmung 1.6 deren Längsseiten 1.6.1 entlang führbar ist.To press the two
Die vorangehende Schilderung des Aufbaus der erfindungsgemässen Schneidvorrichtung lässt deutlich deren vorteilhafte Wirkungsweise erkennen. Insbesondere kann man hieraus ersehen, dass bei einem mittels dieser Vorrichtung durchgeführten Schneidvorgang auf der vollständigen Breite des zu zertrennenden, bandförmigen Nähgutes, das in der Fig. 1 mit dem Bezugszeichen G angedeutet wurde, eine konstante Schneiddruck- und damit eine gleichmässige Scherenwirkung gewährleistet ist. Die durch das Mitverschieben des Pressorgans aus Mutterschraube 4, federnder Unterlagscheibe 4.1 und Schraubenbolzen 4.2 gegebene Stabilität der Messerplatten 1, 2 gestattet ein problemloses Durchschneiden von Bändern erheblich grösserer Breite als dies bisher der Fall war.The preceding description of the structure of the cutting device according to the invention clearly shows its advantageous mode of operation. In particular, it can be seen from this that during a cutting operation carried out by means of this device, a constant cutting pressure and thus a uniform scissor effect is ensured over the full width of the band-shaped sewing material to be cut, which was indicated in FIG. 1 by the reference symbol G. The stability of the
In der Fig. 1 sind ferner zwecks einer besseren Verständlichkeit der Erfindung schematisch auch der Nähfuss F einer Ueberwendlichnähmaschine N zum Niederhalten des zu bearbeitenden Nähgutes sowie Konturen weiterer Teile derselben Nähmaschine-N veranschaulicht.1 also schematically illustrates the presser foot F of an overlocking sewing machine N for holding down the material to be processed and contours of other parts of the same sewing machine-N for the purpose of better understanding the invention.
Zu einer erleichterten Weiterbeförderung des Nähgutes von der Nähmaschine N nach vollzogenem Nähvorgang kann besonders vorteilhaft eine pneumatische Druckleitung 6 an der der verschiebbaren Messerplatte 2 abgewandten Seite der ortsfesten Messerplatte 1 verlegt sein, die mindestens eine in Nähe des trapezförmigen Einschnittes 1.4 besagter Messerplatte 1 befestigte Düse 6.1 mit Druckluft versorgt.To facilitate further transport of the sewing material from the sewing machine N after the sewing process has been completed, a pneumatic pressure line 6 can be laid particularly advantageously on the side of the fixed
Zur Erhöhung der Stabilität empfiehlt es sich in gewissen Fällen, die Spitzen der schnabelartigen Ansätze 1.3, 2.3 der Messerplatten 1, 2 jeweils anhand einer Strebe fest mit deren Basisteilen 1.5, 2.5 zu verbinden.In order to increase the stability, it is recommended in certain cases to connect the tips of the beak-like extensions 1.3, 2.3 of the
Es wurden schliesslich in der Fig. 1 mit Hilfe der beiden Pfeile A bzw. B je die in der Fig. 2 bzw. der Fig. 3 dargestellten beiden Ansichten der erfindungsgemässen Vorrichtung angedeutet, wobei der Pfeil B gleichzeitig auch die Richtung des Nähgutvorschubes angibt.Finally, with the aid of the two arrows A and B, the two views of the device according to the invention shown in FIG. 2 and FIG. 3 were indicated in FIG. 1, arrow B simultaneously indicating the direction of the material feed.
Claims (9)
- An apparatus for cutting strip-like sewing material on a sewing machine by means of power-operated cutters cooperating in the manner of scissors, with two cutter plates (1, 2) which are each constructed with two cutting edges (1.1, 1.2; 2.1, 2.2) and which can be pressed against each other on a mounting (3) and at the same time are disposed so that they are linearly displaceable in opposite directions to each other, characterised in that the two cutter plates (1, 2) each have a snout-like projection (1.3, 2.3) at their upper ends as viewed in the operating position and separated from their base part (1.5, 2.5) by a trapezoidal indent (1.4, 2.4), wherein on one cutter plate (1) the sloping lower edge of the snout-like projection (1.3) and the horizontal edge of the trapezoidal indent (1.4) of this cutter plate (1) which is opposite thereto are each constructed as a cutting edge (1.1, 1.2), whilst the other cutter plate (2) has a cutting edge (2.1, 2.2) both on the horizontal upper edge and on the sloping lower edge of its snout-like projection (2.3).
- An apparatus according to claim 1, characterised in that the cutter plates (1, 2) are of substantially quadrangular shape and are accommodated on the mounting (3) in such a way that they adopt a vertical position after the mounting is fastened to the sewing machine (N) and at the same time are oriented at right angles to the direction (B) of advance of the sewing material.
- An apparatus according to claim 1 and 2, characterised in that the mounting (3) consists of a support (3.1) for receiving the two cutter plates (1,2), an operating mechanism (3.2), which is likewise anchored to the support (3.1), for operating one of the two cutter plates (1, 2), namely the movable cutter plate (2), and a retaining plate (3.3) on which the support (3.1) and the operating mechanism (3.2) are disposed fixed, and which can be installed on a sewing machine (N).
- An apparatus according to any one of claims 1 to 3, characterised by the association of the two cutter plates (1, 2) with each other, so that on each upward stroke of the movable cutter plate (2) the cutting edge (2.1) on the horizontal upper edge of its snout-like projection (2.3) cooperates with the cutting edge (1.1) on the sloping lower edge of the snout-like projection (1.3) of the fixed cutter plate (1) and on each downward stroke of the movable cutter plate (2) the cutting edge (2.2) on the sloping lower edge of its snout-like projection (2.3) cooperates with the cutting edge (1.2) on the horizontal edge of the trapezoidal indent (2.4) of the fixed cutter plate (1).
- An apparatus according to any one of claims 1 to 4, characterised in that a threaded nut (4) with a spring washer (4.1) is provided on the face of the movable cutter plate (2) remote from the fixed cutter plate (1), which threaded nut cooperates with one end of a screw bolt (4.2) passing through the two cutter plates (1, 2) for adjusting the cutting pressure with which the two cutter plates (1, 2) are pressed against each other during the cutting operation, the other end of which screw bolt is seated in the fixed cutter plate (1) in a manner such that it is displaceable during the cutting operation.
- An apparatus according to claim 5, characterised by a window-like recess (1.6), which is not a through recess and which is incorporated into the face of the fixed cutter plate (1) remote from the movable cutter plate (2), with sidewalls (1.6.1) which extend vertically in the operating position and a slot (1.6.3), disposed in the middle of its base (1.6.2) and passing through parallel to the sidewalls (1.6.1), for the pressure-producing screw bolt (4.2) and another bolt (3.2.2) which forms part of the operating connection (3.2.1) between the movable cutter plate (2) and its operating mechanism (3.2).
- An apparatus according to claim 6, characterised in that the two bolts (3.2.2., 4.2) are seated in a sliding carriage (5) which is displaceable together with the movable cutter plate (2) and which at the same time can be guided along the sidewalls (1.6.1) of the window-like recess (1.6) by means of four rollers (5.1) at the base (1.6.2) of the window-like recess.
- An apparatus according to any one of claims 1 to 7, characterised by a pneumatic pressure line (6) which is placed on the face of the fixed cutter plate (1) remote from the movable cutter plate (2) and which is connected to at least one nozzle (6.1) disposed in the vicinity of the trapezoidal indent (1.4) of the fixed cutter plate.
- An apparatus according to any one of claims 1 to 8, characterised in that the tip of each snout-like projection (1.3, 2.3) is rigidly attached via a brace to the base part (1.5, 2.5) of the cutter plate (1, 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89121761T ATE103350T1 (en) | 1988-11-25 | 1989-11-24 | DEVICE FOR CUTTING STRIP-SHAPED SEWING GOOD. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4388/88 | 1988-11-25 | ||
| CH4388/88A CH679162A5 (en) | 1988-11-25 | 1988-11-25 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0370526A2 EP0370526A2 (en) | 1990-05-30 |
| EP0370526A3 EP0370526A3 (en) | 1990-12-05 |
| EP0370526B1 true EP0370526B1 (en) | 1994-03-23 |
Family
ID=4275191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89121761A Expired - Lifetime EP0370526B1 (en) | 1988-11-25 | 1989-11-24 | Device for cutting strips of sewing material |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5052317A (en) |
| EP (1) | EP0370526B1 (en) |
| JP (1) | JP2698456B2 (en) |
| AT (1) | ATE103350T1 (en) |
| CH (1) | CH679162A5 (en) |
| DE (1) | DE58907288D1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2901777B2 (en) * | 1991-03-28 | 1999-06-07 | 大日本スクリーン製造株式会社 | Scanning exposure equipment |
| US6435066B1 (en) | 1997-12-18 | 2002-08-20 | Springs Window Fashions Division, Inc. | Cutting apparatus for window covering and methods therefor |
| US7017459B2 (en) * | 1999-07-23 | 2006-03-28 | Shade-O-Matic Limited | Blind cut down machine |
| US7918150B2 (en) * | 1999-07-23 | 2011-04-05 | Shade-O-Matic Limited | Blind cut down machine |
| DE19959091A1 (en) * | 1999-12-08 | 2001-06-21 | Schips Ag Naehautomation Tueba | Device for cutting band-shaped material |
| US20090038161A1 (en) * | 2007-08-09 | 2009-02-12 | Illinois Tool Works Inc. | Device for cutting continuously moving zipper |
| JP6360361B2 (en) * | 2014-06-11 | 2018-07-18 | Juki株式会社 | Overlock sewing machine |
| WO2019071097A1 (en) * | 2017-10-06 | 2019-04-11 | Hamer-Fischbein Llc | Sewing stitch length adjustment mechanisms |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1065941A (en) * | 1912-11-25 | 1913-07-01 | John Holtzmann | Strip-cutting attachment for sewing-machines. |
| JPS5244072A (en) * | 1975-10-03 | 1977-04-06 | Mitsubishi Heavy Ind Ltd | Method for processing waste from stock farm |
| JPS5418630A (en) * | 1977-07-13 | 1979-02-10 | Fujitsu Ltd | Character isolating process system |
| IT1162776B (en) * | 1979-09-20 | 1987-04-01 | Rockwell Rimoldi Spa | SEPARATOR KNIFE PROVIDED WITH PROTECTION AND LOCK ESPECIALLY FOR SEWING MACHINES |
| DE3339421A1 (en) * | 1982-10-29 | 1984-05-03 | Juki Co. Ltd., Tokyo | OVERLOCK SEWING MACHINE WITH DEVICE FOR ADJUSTING THE LOOP WIDTH |
| DE3426283A1 (en) * | 1984-07-17 | 1986-01-23 | WEDA Roland Werner GmbH, 7410 Reutlingen | Device for cutting off sewn tapes occurring on a sewing machine |
| JPS63281681A (en) * | 1987-05-13 | 1988-11-18 | シグマ精機株式会社 | Display ribbon sewing method and apparatus |
-
1988
- 1988-11-25 CH CH4388/88A patent/CH679162A5/de not_active IP Right Cessation
-
1989
- 1989-11-22 US US07/440,904 patent/US5052317A/en not_active Expired - Fee Related
- 1989-11-24 EP EP89121761A patent/EP0370526B1/en not_active Expired - Lifetime
- 1989-11-24 AT AT89121761T patent/ATE103350T1/en not_active IP Right Cessation
- 1989-11-24 JP JP1306332A patent/JP2698456B2/en not_active Expired - Lifetime
- 1989-11-24 DE DE89121761T patent/DE58907288D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE58907288D1 (en) | 1994-04-28 |
| JPH02200864A (en) | 1990-08-09 |
| CH679162A5 (en) | 1991-12-31 |
| ATE103350T1 (en) | 1994-04-15 |
| US5052317A (en) | 1991-10-01 |
| EP0370526A2 (en) | 1990-05-30 |
| EP0370526A3 (en) | 1990-12-05 |
| JP2698456B2 (en) | 1998-01-19 |
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