Patent ID: 7370464

Claim:
A method for feeding a yarn to a textile machine for its processing and preparation for subsequent utilization, comprising: providing said yarn comprising at least first and second threads ( 3 , 4 ) which are bound together; unwinding said first thread ( 3 ) and second thread ( 4 ) from a corresponding bobbin, the second thread ( 4 ) being an elastomeric thread, the second thread ( 4 ) being unwound from a relative bobbin ( 6 ) by withdrawal under free tension; subjecting said elastomeric second thread ( 4 ) to tension regulation in order to feed said elastomeric second thread ( 4 ) at constant tension to a next stage, in which said elastomeric second thread ( 4 ) is bound to the first thread ( 3 ), the tension of the elastomeric second thread ( 4 ) being regulated on the basis of a predefined value, said value being maintained during the entire processing of the yarn by the textile machine, wherein said first and second threads ( 3 , 4 ) are fed to a device ( 7 ) for binding them together, a third thread ( 4 A) of elastomeric material reaching said device ( 7 ), change-over means ( 10 ) being provided to allow said binding device to operate on said third thread ( 4 A) whenever the feed of the second thread of elastomeric material ( 4 ) presents an error and the first thread ( 3 ) is not fed to said binding device ( 7 ), said third thread ( 4 A) being unwound by withdrawal under free tension from its own bobbin ( 6 A) and being subjected to tension regulation before reaching said binding device ( 7 ).