Method for Selective Display of Yarn in a Tufted Fabric with Offset Rows of Needles

摘要

A novel method of tufting carpets is provided to allow the use of the same sequence of colored yarns on front and rear staggered needle bars to yield sufficient gauge stitch density to provide for a solid appearance of any of the selected colors et, and utilizing optimized tacking of rear yarns to minimize loose yarn on the backing.

主权项

1. In a tufting machine of the type having front and rear rows of spaced needles disposed transversely across the width of the machine, said front and rear rows of needles being laterally spaced at the same needle gauge, and said front and rear rows being longitudinally spaced apart by an offset, a pattern yarn feed attachment for supplying yarns to the needles, a needle bar shifter for shifting the transverse rows of needles, front loopers spaced apart at the needle gauge operable to seize yarns from the front needles and rear loopers spaced apart at the needle gauge operable to seize yarns from the rear needles, said front and rear loopers being staggered relative to one another, a control system for providing pattern information to the pattern yarn feed attachment and needle bar shifter a method of forming a tufted fabric comprising
threading the front transverse row of needles with a repeating sequence of at least first yarns and second yarns; threading the rear transverse row of needles with the same repeating sequence of at least first yarns and second yarns; feeding a backing fabric with a first face surface and an opposite back surface through the tufting machine and reciprocating the front and rear transverse rows of needles to cause the plurality of yarns to penetrate the face surface of the backing fabric; seizing the yarns penetrating the face surface of the backing fabric with loopers; laterally shifting the front and rear transverse rows of needles; controlling the feeding of yarns to the transverse rows of needles in accordance with the pattern information and in accordance with a pattern offset to form areas of relatively adjacent high tufts of first yarns from the front row of needles and high tufts of first yarns from the rear row needles to be displayed and second yarns from the front and rear rows of needles to be hidden.