EP 2829647 A1 20150128 - Yarn feeder provided with a weft-winding drum and with a feedback-controlled, weft-braking device
Title (en)
Yarn feeder provided with a weft-winding drum and with a feedback-controlled, weft-braking device
Title (de)
Garnzuführvorrichtung mit Schussfaden-Wickeltrommel und feedbackgesteuerter Schussfaden-Bremsvorrichtung
Title (fr)
Dispositif d'alimentation en fil pourvu d'un tambour à canetage et avec dispositif double face commandé par rétroaction
Publication
Application
Priority
IT TO20130616 A 20130722
Abstract (en)
A drum (12) has a yarn (Y) wound thereon which is adapted to be unwound upon request of a downstream textile machine. A passive weft-braking device (22) exerts a predetermined, uncontrolled braking action upon the yarn (Y). A controlled weft-braking device (24) arranged downstream of the passive weft-braking device (22) is provided with a first series of comb-like arranged prongs (36) and with a second series of comb-like arranged prongs (40) inserted in an alternated configuration between the prongs (36) of the first series. The yarn (Y) runs in a zig-zag manner between the two series of prongs (36, 40) and receives a braking action by friction from them, which changes in strength depending on their relative position. A motor (46) drives the second series of prongs (40) with respect to the first one for adjusting the strength of the braking action. A tension sensor (50) measures the tension of the yarn (Y) unwinding from the drum (12) and generates a corresponding tension signal (T). A control unit (CU) controls the motor (46) by feedback based on the tension signal (T), in such a way as to stabilize the tension of the yarn (Y) on a desired level.
IPC 8 full level
B65H 59/30 (2006.01); D03D 47/34 (2006.01); D03D 47/36 (2006.01); D04B 15/44 (2006.01); D04B 15/48 (2006.01)
CPC (source: EP)
B65H 59/30 (2013.01); D03D 47/347 (2013.01); D03D 47/366 (2013.01); D04B 15/44 (2013.01); D04B 15/484 (2013.01); B65H 2701/31 (2013.01)
Citation (applicant)
EP 0707102 A2 19960417 - LGL ELECTRONICS SPA [IT]
Citation (search report)
- [YA] US 5487415 A 19960130 - MAINA BRUNO [IT]
- [YA] EP 1072707 A1 20010131 - LGL ELECTRONICS SPA [IT]
- [YA] US 2774551 A 19561218 - PIEPER ALPHONSE F
- [YA] DE 19544202 A1 19970605 - SCHLAFHORST & CO W [DE]
- [YA] EP 2610380 A1 20130703 - LGL ELECTRONICS SPA [IT]
- [A] EP 0622485 A1 19941102 - LGL ELECTRONICS SPA [IT]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2829647 A1 20150128; EP 2829647 B1 20170816; CN 104326308 A 20150204; CN 104326308 B 20181009; IT TO20130616 A1 20150123
DOCDB simple family (application)
EP 14001766 A 20140520; CN 201410344435 A 20140718; IT TO20130616 A 20130722