| 摘要 |
The present invention is directed to an apparatus for attaching welding pins to sheet metal, and particularly for attaching by a resistance welding procedure pins for retaining insulating material to a duct substrate. A characterizing feature of the invention resides in the provision of a fixed hopper member for receiving bulk quantities of weld pins and a carriage movable relative to the hopper for enabling the pins to be applied to the duct at spaced points, the combination including means for discharging a plurality of oriented pins from the bulk supply hopper to the movable carriage responsive to predetermined movement of the carriage.
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