EP 0356380 B1 19941123 - Method to avoid stress peaks in the weft at insertion during braking.
Title (en)
Method to avoid stress peaks in the weft at insertion during braking.
Title (de)
Verfahren zum Vermeiden von Spannungsspitzen eines Schussfadens beim Schusseintrag während des Bremsvorganges.
Title (fr)
Procédé pour éviter les pics de contrainte dans la trame lors de son introduction au moment du freinage.
Publication
Application
Priority
CH 316988 A 19880825
Abstract (en)
[origin: JPH0299644A] PURPOSE: To prevent the occurrence of yarn breakage by arranging a damping means comprising a force-storing means and a deflector between a weft storing device and a main nozzle, braking the yarn speed at the end of weft insertion and avoiding the occurrence of stress peaks. CONSTITUTION: A damping means 20 having a force-storing means 21 composed of a spring material in order to deflect a weft yarn 1 from a straight advancing path thereof is arranged before a main nozzle 7 in weft insertion of the weft yarn 1 drawn off from a package 4 and stored in a storing device 5 with the main nozzle 7. The damping means 20 engages the weft yarn 1 by cooperation with an upper deflector 23 in the near center of the two deflectors 22 and 23 arranged on both sides of the force-storing means 21. The measured yarn speed is used as a basis for controlling the period of start, duration and/or magnitude of the reduction of the deflection in the above deflection and/or the damping process to control the period of the start, duration and/or magnitude of the reduction of the deflection in the deflection and/or the damping process for performing the yarn speed braking. Thereby, stress peaks are prevented from occurring.
IPC 1-7
IPC 8 full level
D03D 47/34 (2006.01)
CPC (source: EP US)
B65H 59/26 (2013.01 - EP US); D03D 47/34 (2013.01 - EP US); B65H 2701/31 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE SE
DOCDB simple family (publication)
EP 0356380 A1 19900228; EP 0356380 B1 19941123; DE 58908655 D1 19950105; JP 2992890 B2 19991220; JP H0299644 A 19900411; US 4962796 A 19901016
DOCDB simple family (application)
EP 89810527 A 19890712; DE 58908655 T 19890712; JP 21844589 A 19890824; US 39877189 A 19890825