The Collaborative International Dictionary of English v.0.48:

Scauper \Scaup"er\, n. [Cf. Scalper.]
   A tool with a semicircular edge, -- used by engravers to
   clear away the spaces between the lines of an engraving.
   --Fairholt.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scauper
    n 1: a graver used to scoop out broad areas when engraving wood
         or metal [syn: scauper, scorper]