Yarn feed system for tufting machines

Details Yarn feed system for tufting machines Yarn feed system for tufting machines

1989-02-24

1989-10-03

Feldbaum, Ronald

Sewing

Special machines

Embroidering

112 8073, D05C 1530

Patent

active

048709158

ABSTRACT:
A tufting machine having laterally shifting needles has a controlled amount of yarn fed to the needles, the amount of yarn being appropriate for the insertion of a diagonal back stitch such as arises during lateral shift of the needles relative to a backing material during the tufting operation. The yarn is wrapped about a plurality of rotating feed rollers each driven at a constant speed, the rollers having a smooth surface so that the yarn slips on the rollers until the needles induce sufficient tension on the yarn to cause it to grip and be driven by the rollers. The speed of the rollers is greater than the required to accommodate the yarn requirements of the needles if no slippage occurred between the yarn and the rollers. An additive tension may be applied between the feed rollers and the needles by a leaf spring and an anvil against which the leaf spring is biased, the yarn being fed between the anvil and the spring.

REFERENCES:
patent: 3955514 (1976-05-01), Prichard
patent: 4411207 (1983-10-01), Brock et al.

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