A yarn feed roller assembly for a tufting machine

摘要

A yarn feed roller assembly for a tufting machine for producing multiple pile heights. The assembly comprises at least two rollers 5,6 driven at different speeds and a plurality of actuators 9, 14, 15 each arranged to bring an end of yarn selectively into driving engagement with either drive roller. The actuator may be switched between the drive rollers at any point during the needle stroke thereby varying the proportion of the stroke spent in contact with one or other drive roller, and hence varying the pile height. <IMAGE>