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1. (WO2018059738) DEVICE AND METHOD FOR AUTOMATICALLY STABILISING THE THREAD TENSION IN SEWING MACHINES, AND SEWING MACHINE COMPRISING THIS DEVICE

Pub. No.:    WO/2018/059738    International Application No.:    PCT/EP2017/001158
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Sat Sep 30 01:59:59 CEST 2017
IPC: D05B 47/04
Applicants: ADIENT LUXEMBOURG HOLDING S.À R.L.
Inventors: MINZICU, Costin
GHEORGHE, Matei
DITA, Adrian
CATRINESCU, Florin Eugen
Title: DEVICE AND METHOD FOR AUTOMATICALLY STABILISING THE THREAD TENSION IN SEWING MACHINES, AND SEWING MACHINE COMPRISING THIS DEVICE
Abstract:
The invention relates to a device and a method for automatically stabilising the thread tension in sewing machines. A tension means (7) tensions an upper thread (15) in a portion (9) of the upper thread (15) which is guided to a needle (8). In accordance with the invention the tension means (7) comprises a pneumatic spring retractor (3), which additionally tensions the portion (9) of the upper thread (15) guided to the needle (8). A sewing machine according to the invention, which comprises the device or is designed to carry out the method, is able to produce high-quality seams, even with changing sewing speeds and with different materials.