EP 0415952 B1 19930505 - PROCESS AND DEVICE FOR STARTING SPINNING IN AN OPEN-END SPINNING DEVICE
Title (en)
PROCESS AND DEVICE FOR STARTING SPINNING IN AN OPEN-END SPINNING DEVICE
Publication
Application
Priority
DE 3814966 A 19880503
Abstract (en)
[origin: WO8910990A1] In order to start spinning in an open-end spinning device, the fibre feed which is interrupted during standstill is restarted on a fibre-collecting surface and brought immediately to full production speed. For this purpose, the combed condition of the fibre tuft at the time of starting (tL?) is determined. The time of starting and the doffing speed of the fibers are adapted to the time at which the fibre feed to the fibre-collecting surface becomes effective. The yarn is subjected to a multiple-phase doffing acceleration. The first phase (GA3?) of the doffing acceleration is synchronized with the joining of the fibres at the return end of the yarn. At least one additional phase (GAc'?, GA''?) of the doffing acceleration serves to attain and/or maintain the desired mass of fibres. The control device for implementing the starting process is connected to a device for determining the combed condition of the fibre tuft at the time of starting and controls the doffing of the fibres in function of said condition. At least two fibre-accelerating devices can be selected by the control device.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
D01H 4/50 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
WO 8910990 A1 19891116; BR 8906909 A 19900911; CS 272989 A2 19911112; DE 3814966 A1 19891116; DE 58904292 D1 19930609; EP 0415952 A1 19910313; EP 0415952 B1 19930505; JP H03505237 A 19911114; US 5331798 A 19940726; US 5423171 A 19950613
DOCDB simple family (application)
DE 8900275 W 19890428; BR 8906909 A 19890428; CS 272989 A 19890503; DE 3814966 A 19880503; DE 58904292 T 19890428; EP 89905051 A 19890428; JP 50486389 A 19890428; US 12878393 A 19930211; US 25306094 A 19940602