EP0342555A1 - Sewing machine using automatic separation of the sewn articles - Google Patents

Sewing machine using automatic separation of the sewn articles Download PDF

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Publication number
EP0342555A1
EP0342555A1 EP89108624A EP89108624A EP0342555A1 EP 0342555 A1 EP0342555 A1 EP 0342555A1 EP 89108624 A EP89108624 A EP 89108624A EP 89108624 A EP89108624 A EP 89108624A EP 0342555 A1 EP0342555 A1 EP 0342555A1
Authority
EP
European Patent Office
Prior art keywords
sewing
cutting device
sewing machine
pressure plate
thread chain
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
EP89108624A
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German (de)
French (fr)
Other versions
EP0342555B1 (en
Inventor
Helmut Schips
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.)
Schips AG Nahautomationen
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Schips AG Nahautomationen
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Filing date
Publication date
Application filed by Schips AG Nahautomationen filed Critical Schips AG Nahautomationen
Publication of EP0342555A1 publication Critical patent/EP0342555A1/en
Application granted granted Critical
Publication of EP0342555B1 publication Critical patent/EP0342555B1/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
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/06—Presser feet
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • the invention relieves the operator of the described, time-consuming handling activity. There is an increase in productivity.
  • the sewing machine is technically very simple.
  • the piece of sewn fabric that is sewn in each case is transported on without the operator's intervention and without the use of any additional conveying devices, and the thread chain between successive pieces of sewing material is cut automatically. Even when the rear edge of each piece of sewing material has passed through about a third of the length of the fabric pusher and the pressure plate from its rear end, the operator can devote himself to preparing the next piece of sewing material. The completion of the sewing process on the previous piece of sewing material and the transfer of the sewn sewing material piece are carried out automatically without the operator having to monitor this in particular and to intervene in order to transport the sewn sewing material piece onward. Further transport of the piece of sewing material after the thread chain has been severed to other processing stations is also possible automatically.
  • the fabric slide extended on one side and the pressure plate elongated on one side cause a tendency of the respective piece of sewing material to move obliquely forward sideways to the cutting device, the thread chain between this sewing material piece and the subsequent sewing material piece being relaxed. As a result, the suction of the thread chain to the cutting device is facilitated.
  • a needle plate 2 is embedded in its working surface 1. This takes on a fabric pusher 3. Furthermore, as seen in the direction V of the material feed, a wedge-shaped projection 2.1 pointing in the same direction is formed on the right long side of the needle plate 2.
  • the free-running section of the attachment 2.1 is separated from the actual needle plate 2 by a slot 4 located in the sewing axis A, into which the sewing needle 5 of the sewing machine engages to form the thread structure or the thread chain F.
  • a pressure plate 6 of a presser foot 7 of the sewing machine which can be raised and lowered, cooperates with the fabric slide 3.
  • a cutting device 8 with an integrated suction device, aligned parallel to the sewing axis A, is arranged along the right long side of the work surface 1.
  • the suction opening 10 of the suction device is aligned at right angles to the feed direction V.
  • the fabric slide 3 and the pressure plate 6 each have an extension 12 or 14 on their side facing away from the cutting device 8 in the direction V of the material feed, so that they extend from the operating side of the sewing machine (below viewed in FIG. 2), extend to the level of the cutting edge 8.1 of the cutting device 8.
  • the plane of the cutting edge 8.1 is at right angles to the feed direction V.
  • the extension 12 or 14 is approximately 20% of the length l u of the fabric slide 3 or the pressure plate 6 which has been customary hitherto.
  • FIGS. 1 and 2 show a finished, sewn piece of sewing material N immediately after the thread structure F has been separated by the cutting edge 8.1 of the cutting device 8.
  • the dash-dotted outline of the rear part of a sewing material piece N also represents that position of the sewing material piece N in the course of the sewing process, from which no more monitoring by the operator is necessary and the operator can concentrate on the preparation of the next piece of sewing material N.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A sewing machine capable of automatically severing a thread chain between successive pieces of sewing material includes a cutting device provided behind a sewing needle in a feed direction of the sewing material, a suction device for sucking the thread chain toward the cutting device, and a feeder and a cooperating pressure plate of a presser foot which each have a projection extending in the feed direction such that the cutting device and the ends of the feeder and the presser plate lie substantially in one plane.

Description

Gegenstand der Erfindung ist eine Nähmaschine mit einer Einrichtung zum selbsttätigen Durchtrennen der Fadenkette zwischen aufeinanderfolgenden Nähgutstücken, aufweisend:

  • (a) in Nähgutvorschubrichtung hinter der Nähnadel und seit­lich gegenüber der Nähachse versetzt ist eine Schneid­einrichtung angebracht;
  • (b) der Schneideinrichtung ist eine Saugeinrichtung zuge­ordnet, um die Fadenkette zur Seite und zu der Schneid­einrichtung zu saugen;
  • (c) der Stoffschieber und die damit zusammenwirkende Druck­platte des Drückerfußes der Nähmaschine weisen an ihrer von der Schneideinrichtung und der Saugeinrichtung ent­fernteren Seite jeweils eine sich in Nähgutvorschub­richtung so weit erstreckende Verlängerung auf, daß die Schneideinrichtung und die Enden des Stoffschiebers und der Druckplatte im wesentlichen in einer Ebene liegen.
The invention relates to a sewing machine with a device for automatically severing the thread chain between successive pieces of sewing material, comprising:
  • (a) a cutting device is attached behind the sewing needle in the feed direction and laterally offset from the sewing axis;
  • (b) a suction device is assigned to the cutting device in order to suck the thread chain to the side and to the cutting device;
  • (c) the cloth pusher and the cooperating pressure plate of the presser foot of the sewing machine each have an extension in the material feed direction on their side farther from the cutting device and the suction device that the cutting device and the ends of the cloth pusher and the pressure plate are essentially in lie on one level.

Bei bekannten, mit einer Einrichtung zum selbsttätigen Durchtrennen der Fadenkette ausgestatteten Nähmaschinen muß jeweils das fertiggenähte Nähgutstück, nachdem seine Hinter­kante das Ende des Stoffschiebers und der Druckplatte des Drückerfußes passiert hat, nach vorn zu der Schneideinrich­tung gezogen werden. Dadurch wird die Arbeitsfläche der Näh­maschine für das nachfolgende Nähgutstück freigemacht. Während die Bedienungsperson jeweils ein fertiggenähtes Nähgutstück von Hand der Schneideinrichtung zuführt, ist sie an der Weiterführung der eigentlichen Näharbeit gehindert.In known sewing machines equipped with a device for automatically severing the thread chain, the piece of sewn sewn fabric, after its trailing edge has passed the end of the fabric pusher and the pressure plate of the presser foot, must be pulled forward to the cutting device. This clears the work surface of the sewing machine for the subsequent piece of sewing material. While the operator feeds a piece of sewn material by hand to the cutting device, he is prevented from continuing the actual sewing work.

Durch die Erfindung ist die Bedienungsperson von der geschilderten, Zeit erfordernden Handhabungstätigkeit ent­lastet. Es ergibt sich eine Produktivitätssteigerung. Die Nähmaschine ist technisch sehr einfach aufgebaut.The invention relieves the operator of the described, time-consuming handling activity. There is an increase in productivity. The sewing machine is technically very simple.

Bei der erfindungsgemäßen Nähmaschine wird das jeweils fertiggenähte Nähgutstück ohne Zutun der Bedienungsperson und ohne Verwendung irgendwelcher zusätzlicher Förderein­richtungen weitertransportiert, und die Fadenkette zwischen aufeinanderfolgenden Nähgutstücken wird selbsttätig durch­trennt. Bereits dann, wenn die Hinterkante eines jeweiligen Nähgutstücks etwa ein Drittel der Länge des Stoffschiebers und der Druckplatte von deren hinterem Ende aus durchlaufen hat, kann sich die Bedienungsperson der Vorbereitung des nächstfolgenden Nähgutstücks widmen. Die Fertigstellung des Nähvorgangs am vorherigen Nähgutstück und die Weitergabe des fertiggenähten Nähgutstücks erfolgen selbsttätig, ohne daß die Bedienungsperson dies besonders überwachen und zwecks Weitertransports des fertiggenähten Nähgutstücks eingreifen muß. Auch ein Weitertransport des Nähgutstücks nach der Durchtrennung der Fadenkette zu weiteren Bearbeitungs­stationen ist selbsttätig möglich.In the sewing machine according to the invention, the piece of sewn fabric that is sewn in each case is transported on without the operator's intervention and without the use of any additional conveying devices, and the thread chain between successive pieces of sewing material is cut automatically. Even when the rear edge of each piece of sewing material has passed through about a third of the length of the fabric pusher and the pressure plate from its rear end, the operator can devote himself to preparing the next piece of sewing material. The completion of the sewing process on the previous piece of sewing material and the transfer of the sewn sewing material piece are carried out automatically without the operator having to monitor this in particular and to intervene in order to transport the sewn sewing material piece onward. Further transport of the piece of sewing material after the thread chain has been severed to other processing stations is also possible automatically.

Der einseitig verlängerte Stoffschieber und die einseitig verlängerte Druckplatte bewirken eine Tendenz des jeweiligen Nähgutstücks, sich schräg nach vorn seitlich zu der Schneid­einrichtung zu bewegen, wobei die Fadenkette zwischen diesem Nähgutstück und dem nachfolgenden Nähgutstück entspannt wird. Infolgedessen ist das Ansaugen der Fadenkette an die Schneid­einrichtung erleichtert.The fabric slide extended on one side and the pressure plate elongated on one side cause a tendency of the respective piece of sewing material to move obliquely forward sideways to the cutting device, the thread chain between this sewing material piece and the subsequent sewing material piece being relaxed. As a result, the suction of the thread chain to the cutting device is facilitated.

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

  • Figur 1 die Arbeitsfläche einer Nähmaschine zusammen mit den erfindungsgemäß ausgeführten Maschinen­teilen Stoffschieber und Druckplatte des Drückerfußes in Seitenansicht; und
  • Figur 2 eine Draufsicht auf den Arbeitsbereich der Näh­maschine gemäß Figur 1.
Show it
  • Figure 1 shows the working surface of a sewing machine together with the machine parts fabric slide and pressure plate of the presser foot according to the invention in side view; and
  • FIG. 2 shows a plan view of the working area of the sewing machine according to FIG. 1.

Im Arbeitsbereich der Nähmaschine nach den Figuren 1 und 2 ist in deren Arbeitsfläche 1 eine Nadelplatte 2 einge­bettet. Diese nimmt einen Stoffschieber 3 auf. Es ist ferner, in Richtung V des Nähgutvorschubs gesehen, an der rechten Längsseite der Nadelplatte 2 ein in die gleiche Richtung weisender, keilförmiger Ansatz 2.1 ausgebildet. Der freiverlaufende Abschnitt des Ansatzes 2.1 ist von der eigentlichen Nadelplatte 2 durch einen in der Nähachse A liegenden Schlitz 4 getrennt, in den die Nähnadel 5 der Nähmaschine zur Ausbildung des Faden­gebildes bzw. der Fadenkette F eingreift. In der Figur 1 ist über dem Stoffschieber 3 eine mit diesem zusammen­wirkende Druckplatte 6 eines heb- und absenkbaren Drückerfußes 7 der Nähmaschine veranschaulicht. Schließ­lich ist eine Schneidvorrichtung 8 mit integrierter Saug­vorrichtung, parallel zur Nähachse A ausgerichtet, der rechten Längsseite der Arbeitsfläche 1 entlang angeordnet. Die Saugöffnung 10 der Saugvorrichtung ist rechtwinklig zur Vorschubrichtung V ausgerichtet.In the working area of the sewing machine according to FIGS. 1 and 2, a needle plate 2 is embedded in its working surface 1. This takes on a fabric pusher 3. Furthermore, as seen in the direction V of the material feed, a wedge-shaped projection 2.1 pointing in the same direction is formed on the right long side of the needle plate 2. The free-running section of the attachment 2.1 is separated from the actual needle plate 2 by a slot 4 located in the sewing axis A, into which the sewing needle 5 of the sewing machine engages to form the thread structure or the thread chain F. In FIG. 1, a pressure plate 6 of a presser foot 7 of the sewing machine, which can be raised and lowered, cooperates with the fabric slide 3. Finally, a cutting device 8 with an integrated suction device, aligned parallel to the sewing axis A, is arranged along the right long side of the work surface 1. The suction opening 10 of the suction device is aligned at right angles to the feed direction V.

Wie aus den Figuren 1 und 2 ersichtlich, weisen der Stoffschieber 3 und die Druckplatte 6 jeweils auf ihrer der Schneidvorrichtung 8 abgewandten Seite in Richtung V des Nähgutvorschubs eine Verlängerung 12 bzw. 14 auf, so daß sie sich, von der Bedienungsseite der Nähmaschine (unten in Figur 2) her betrachtet, bis zur Ebene der Schneide 8.1 der Schneidvorrichtung 8 erstrecken. Die Ebene der Schneide 8.1 liegt rechtwinklig zur Vorschub­richtung V. Die Verlängerung 12 bzw. 14 beträgt etwa 20% der bisher üblichen Baulänge lu des Stoffschiebers 3 bzw. der Druckplatte 6.As can be seen from FIGS. 1 and 2, the fabric slide 3 and the pressure plate 6 each have an extension 12 or 14 on their side facing away from the cutting device 8 in the direction V of the material feed, so that they extend from the operating side of the sewing machine (below viewed in FIG. 2), extend to the level of the cutting edge 8.1 of the cutting device 8. The plane of the cutting edge 8.1 is at right angles to the feed direction V. The extension 12 or 14 is approximately 20% of the length l u of the fabric slide 3 or the pressure plate 6 which has been customary hitherto.

Die Figuren 1 und 2 zeigen ein weiterbefördertes, fertig­genähtes Nähgutstück N unmittelbar nach der Abtrennung des Fadengebildes F durch die Schneide 8.1 der Schneid­vorrichtung 8. Es stellen in der Figur 1 ferner die strichpunktierten Umrisse des hinteren Teils eines Näh­gutstücks N diejenige Position des Nähgutstücks N im Verlaufe des Nähvorganges dar, ab welcher keine Über­wachung durch die Bedienungsperson mehr notwendig ist und diese sich auf die Vorbereitung des nächstkommenden Näh­gutstücks N konzentrieren kann.FIGS. 1 and 2 show a finished, sewn piece of sewing material N immediately after the thread structure F has been separated by the cutting edge 8.1 of the cutting device 8. In FIG. 1, the dash-dotted outline of the rear part of a sewing material piece N also represents that position of the sewing material piece N in the course of the sewing process, from which no more monitoring by the operator is necessary and the operator can concentrate on the preparation of the next piece of sewing material N.

In der gezeichneten Position des Nähgutstücks N besteht zwischen dessen Hinterkante und der Hinterkante der Druck­platte 6 ein Abstand, der etwa 1/3 der Baulänge lD der Druckplatte 6 beträgt.In the drawn position of the workpiece N, there is a distance between its rear edge and the rear edge of the pressure plate 6, which is approximately 1/3 of the overall length l D of the pressure plate 6.

Claims (1)

Nähmaschine mit einer Einrichtung zum selbsttätigen Durchtrennen der Fadenkette zwischen aufeinanderfolgenden Nähgutstücken, aufweisend: (a) in Nähgutvorschubrichtung hinter der Nähnadel und seitlich gegenüber der Nähachse versetzt ist eine Schneideinrichtung angebracht; (b) der Schneideinrichtung ist eine Saugeinrichtung zu­geordnet, um die Fadenkette zur Seite und zu der Schneideinrichtung zu saugen; (c) der Stoffschieber und die damit zusammenwirkende Druckplatte des Drückerfußes der Nähmaschine weisen an ihrer von der Schneideinrichtung und der Saugein­richtung entfernteren Seite jeweils ein sich in Näh­gutvorschubrichtung so weit erstreckende Verlängerung auf, daß die Schneideinrichtung und die Enden des Stoffschiebers und der Druckplatte im wesentlichen in einer Ebene liegen. Sewing machine with a device for automatically severing the thread chain between successive pieces of sewing material, comprising: (a) a cutting device is attached behind the sewing needle in the feed direction and laterally offset from the sewing axis; (b) a suction device is assigned to the cutting device in order to suck the thread chain to the side and to the cutting device; (c) the cloth pusher and the cooperating pressure plate of the presser foot of the sewing machine each have on their side farther from the cutting device and the suction device an extension that extends so far in the material feed direction that the cutting device and the ends of the cloth pusher and the pressure plate essentially in lie on one level.
EP89108624A 1988-05-17 1989-05-12 Sewing machine using automatic separation of the sewn articles Expired - Lifetime EP0342555B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3816782A DE3816782A1 (en) 1988-05-17 1988-05-17 SEED MATERIAL WITH THREAD SEPARATION
DE3816782 1988-05-17

Publications (2)

Publication Number Publication Date
EP0342555A1 true EP0342555A1 (en) 1989-11-23
EP0342555B1 EP0342555B1 (en) 1995-01-18

Family

ID=6354540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108624A Expired - Lifetime EP0342555B1 (en) 1988-05-17 1989-05-12 Sewing machine using automatic separation of the sewn articles

Country Status (5)

Country Link
US (1) US5027733A (en)
EP (1) EP0342555B1 (en)
JP (1) JP2698427B2 (en)
AT (1) ATE117384T1 (en)
DE (2) DE3816782A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2591525Y2 (en) * 1991-05-29 1999-03-03 横浜ゴム株式会社 Crawler shoe
US5261733A (en) * 1991-05-29 1993-11-16 The Yokohama Rubber Co., Ltd. Shoe of crawler belt or chain
CN103510292B (en) * 2012-06-28 2015-06-17 星锐缝纫机(嘉兴)有限公司 Sewing machine with automatic electromagnetic cutting device
JP2016054830A (en) * 2014-09-08 2016-04-21 Ykk株式会社 Sewing machine foot

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356054A (en) * 1965-04-20 1967-12-05 L & L Mfg Inc Apparatus for back tacking loose ends of sewing machine stitching, and the like
US3710743A (en) * 1971-06-27 1973-01-16 Singer Co Thread-cutting mechanism for sewing machines
DE2437192A1 (en) * 1974-04-30 1975-11-20 Rimoldi C Spa Virginio Chain stitch yarn monitor - including a hollow tube in which terminates stitch forming wedge associated with cutter
FR2379635A1 (en) * 1977-02-02 1978-09-01 Rockwell Rimoldi Spa DEVICE FOR ORIENTING AND HOLDING THE CHAIN OF STITCHES AT THE BEGINNING OF A SEW
DE3522462A1 (en) * 1985-06-22 1987-01-02 Kochs Adler Ag THREAD SEPARATOR, ESPECIALLY FOR THE THREAD CHAINS OF DOUBLE CHAIN STITCH SEWING MACHINES

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7247361U (en) * 1973-04-19 Duerkoppwerke Gmbh Sewing machine for sewing consecutive workpieces
US3046919A (en) * 1959-11-27 1962-07-31 Bemis Bro Bag Co Automatic thread clipper for bag end sewing machines
US3143987A (en) * 1961-10-26 1964-08-11 Union Special Maschinenfab Thread chain severing device for sewing machines
US3557730A (en) * 1964-06-22 1971-01-26 Merrow Machine Co Thread-cutting mechanism for sewing machine
JPS4324308Y1 (en) * 1965-07-22 1968-10-14
US3511202A (en) * 1968-02-28 1970-05-12 Ira Strauss Thread chain severing device for sewing machines
US3494315A (en) * 1968-09-17 1970-02-10 Merrow Machine Co Thread cutting mechanism for sewing machines
CH507409A (en) * 1969-04-02 1971-05-15 Schips Helmut Device on sewing machines for cutting the thread chain
DE1945310C3 (en) * 1969-09-06 1975-07-17 Liersch, Arthur, 2000 Hamburg Device for cutting the thread chain on sewing machines
CH564629A5 (en) * 1973-05-07 1975-07-31 Schips Helmut
IT1042452B (en) * 1975-09-11 1980-01-30 Rockwell Rimoldi Spa PNEUMATIC DEVICE FOR MERE TRACKS THE CHAIN OF STITCHES AT THE BEGINNING OF THE SEWING
IT1085309B (en) * 1977-02-02 1985-05-28 Rockwell Rimoldi Spa DEVICE TO ORIENT AND HOLD THE CHAIN OF STITCHES AT THE BEGINNING OF A SEWING
DE2835994C2 (en) * 1977-09-22 1983-12-08 Rockwell-Rimoldi S.p.A., Olcella, Milano Overlock sewing machine
DE3047121A1 (en) * 1980-12-13 1982-07-29 Heinz 7022 Leinfelden-Echterdingen Hoss Workpiece feed mechanism for industrial sewing machine - with additional extended feed dogs to facilitate automatic thread trimming
US4644884A (en) * 1983-07-28 1987-02-24 Pegasus Sewing Maching Mfg. Co., Ltd. Thread chain sewing apparatus for use in overedge sewing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356054A (en) * 1965-04-20 1967-12-05 L & L Mfg Inc Apparatus for back tacking loose ends of sewing machine stitching, and the like
US3710743A (en) * 1971-06-27 1973-01-16 Singer Co Thread-cutting mechanism for sewing machines
DE2437192A1 (en) * 1974-04-30 1975-11-20 Rimoldi C Spa Virginio Chain stitch yarn monitor - including a hollow tube in which terminates stitch forming wedge associated with cutter
FR2379635A1 (en) * 1977-02-02 1978-09-01 Rockwell Rimoldi Spa DEVICE FOR ORIENTING AND HOLDING THE CHAIN OF STITCHES AT THE BEGINNING OF A SEW
DE3522462A1 (en) * 1985-06-22 1987-01-02 Kochs Adler Ag THREAD SEPARATOR, ESPECIALLY FOR THE THREAD CHAINS OF DOUBLE CHAIN STITCH SEWING MACHINES

Also Published As

Publication number Publication date
DE3816782A1 (en) 1989-11-30
JP2698427B2 (en) 1998-01-19
EP0342555B1 (en) 1995-01-18
DE58908895D1 (en) 1995-03-02
JPH0249689A (en) 1990-02-20
ATE117384T1 (en) 1995-02-15
US5027733A (en) 1991-07-02

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