Method and apparatus for feeding wire to a welding arc

Advancing material of indeterminate length – Plural material-moving means – With means to independently vary mover speed

Reexamination Certificate

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Details

C226S187000, C226S188000

Reexamination Certificate

active

10200884

ABSTRACT:
A method and apparatus for feeding wire in a welding system include one or more motors disposed adjacent the wire to drive it. A wire feed motor is also disposed along the wire path, and is closer to the source of wire than the torch, and closer to the source than the one or more motors. The motors may be a pair motors disposed on opposite sides of the wire and move the wire to and away from an arc end of a torch. They preferably reversing the direction of the wire within one process cycle. The or more motors may be a stepper motor, a servo motor, a zero backlash motor, a gearless motor, a planetary drive motor, or a linear actuator (such as a piston), in various embodiments.

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