Finger deflector

This little gadget does one thing and one thing only, it sorts parts falling off a conveyor based on weight. Heavy parts fall through to the secondary catch, lightweight parts will slide down the finger to the primary catch.

See the figure. The finger itself is made of HDPE, Teflon, or Nylon. It can have a metallic (or plastic) backer spring to increase stiffness as necessary.

As one can see at the bottom of the figure, there is an array of these fingers that span the end of a conveyor line. The fingers look a bit like these musical combs used in music boxes.