Global Patent Index - EP 0997567 A1

EP 0997567 A1 2000-05-03 - Accessory for a sewing machine

Title (en)

Accessory for a sewing machine

Title (de)

Nähmaschinezubehör

Title (fr)

Accessoire pour machine à coudre

Publication

EP 0997567 A1 (DE)

Application

EP 98890320 A

Priority

EP 98890320 A

Abstract (en)

The sewing machine attachment registers the end of a tubular fabric workpiece has a position monitor with light sensors linked to a control with light transmitters and receivers flanking fabric movement path. The sewing machine attachment registers the end of a tubular fabric workpiece (4) in the direction of travel. The light sensors are across the direction of fabric (W) movement, with light transmitters (84-86) and receivers (94-96) above and below the fabric movement path (7). The light sensors (6) register the intensity of the light passing through the fabric (W), to be assessed by the control. The control uses the data from the outermost light sensor (61) at the fabric side as reference data, for comparison with the light data from the other sensors. The change in the light value derived from the comparison at another sensor (6) indicates the end (F) of the fabric (W), and the sewing machine drive is controlled accordingly. The position monitor (3) has a number of light sensors (6) and preferably six. Their light transmitters (84-86) and receivers (94-96) are each assembled into installation units. The light transmission section forms a common light emitting beam.

Abstract (de)

Ein Nähmaschinenzubehör zum Endenerkennen beim Nähen schlauchförmiger Werkstücke (W) weist einen an einer Steuerungseinrichtung (2) anschließbaren Positionsgeber (3) auf. Um ein einfaches und genaues Endenerkennung zu erreichen, umfaßt der in Vorschubrichtung (V) des Werkstückes vor der Nähstelle (4) vorgesehene Positionsgeber (3) zumindest zwei quer zur Vorschubrichtung (V) nebeneinander angeordnete Lichtsensoren (6) aus ober- und unterhalb der Werkstückbahn (7) liegenden Sender- und Empfängerteilen (81 - 86, 91 - 96), wobei die Lichtsensoren (6) die Lichtstärke des das Werkstück (W) durchdringenden Lichtstrahles erfassen und der Steuerungseinrichtung (2) einlesen, die die Daten des werkstückseitig äußersten Lichtsensors (61) als Referenzdaten mit den Daten der anderen Lichtsensoren (6) vergleicht und das Auftreten von gegenüber der durch die Referenzdaten gegebenen Lichtstärke eine geringere Lichtstärke anzeigenden Daten wenigstens eines anderen Lichtsensors als Werkstückende wertet und den Nähmaschinenantrieb dementsprechend ansteuert. <IMAGE>

IPC 1-7 (main, further and additional classification)

D05B 33/00; D05B 69/24

IPC 8 full level (invention and additional information)

D05B 33/00 (2006.01); D05B 69/24 (2006.01)

CPC (invention and additional information)

D05B 33/00 (2013.01); D05B 69/24 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE ES FR GB GR IT LI

EPO simple patent family

EP 0997567 A1 20000503; EP 0997567 B1 20030102; AT 230449 T 20030115; DE 59806827 D1 20030206

INPADOC legal status


2004-06-15 [REG CH PL] PATENT CEASED

2004-05-01 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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