Yarn feeding device and method for yarn feeding
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United States of America Patent
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Issued Date -
Apr 21, 2005
app pub date -
Nov 22, 2004
filing date -
Nov 2, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A yarn feeding device B of a weaving machine W comprising at least two yarn feeding appliances F1, F2 delivering the same yarn quality in a weft mixing process. Each yarn feeding appliance comprises a variable speed control system C, a sensor arrangement 6 which supplies control signals for the size of the stored yarn supply, and t least one fault sensor Z1, Z2, by which means a fault signal X indicating a change in the weft mixing condition, e.g. a yarn break in the upstream from the stored yarn supply, can be emitted. A fault signal transmission link Q1, Q2 is provided extending from each yarn feeding appliance to the speed control system C of each other yarn feeding appliance, and an over-regulating routine 6 is provided in each speed control system C, said routine enabling the speed to be increased before the change in the weft mixing condition, by means off the fault signal X, independently from the control signals of the sensor arrangement 6.
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