Patent 7531768 was granted and assigned to Illinois Tool Works on May, 2009 by the United States Patent and Trademark Office.
A wire pinch force mechanism has a drive assembly which includes at least a first drive roll and a second drive roll adapted and configured to drive a weld wire. The pinch force mechanism further includes a cover movable between a first relatively open position and a second relatively closed position; and a force converter, mounted to the cover, which communicates with and applies an adjustable force to the drive assembly.