Importance

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Abstract

Tubular wire comprising a calcium-containing solidified core in a thin steel sheath is fed between successive sets of resiliently-engaging pinch and feed rollers having aligned V-shaped indented peripheries. A wide range of wire diameters from about 3 to 8 mm are accommodated between a feed roller having an indented relatively sharp obtuse angle of about 120.degree. and a pinch roller having an indented relatively shallow obtuse angle of about 150.degree.. The peripheral walls of the feed rollers have staggered serrations for gripping the wire and a grooved channel between them for removing debris. The pinch rollers of a pair of successive sets are positioned slightly outboard of the feed rollers to keep the wire straight. Simultaneous feeding of two or more wires is provided through a plurality of sets having a common axis of rotation for the feed rollers. A slight drag is imposed on the supply reel as the wire is fed, and the supply reel is stopped just before the feed rollers stop to prevent the wire from unreeling between the supply reel and the feed rollers.

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First Claim