The Collaborative International Dictionary of English v.0.48:

Loper \Lop"er\, n.
   1. One who, or that which, lopes; esp., a horse that lopes.
      [U.S.]
      [1913 Webster]

   2. (Rope Making) A swivel at one end of a ropewalk, used in
      laying the strands.
      [1913 Webster]