Source : Webster's Revised Unabridged Dictionary (1913)

Stapler \Sta"pler\, n.
   1. A dealer in staple goods.

   2. One employed to assort wool according to its staple.

Source : WordNet®

stapler
     n : a machine that inserts staples into sheets of paper in order
         to fasten them together [syn: {stapling machine}]