a machine that sorts out wrong size/defective blanks (planchlets)

a machine that screens out blanks or planchets that are the wrong size or shape

A machine used by mints that screens out planchets of the wrong size and shape prior to striking.

The Riddler, (Edward E. Nigma, also spelled Nygma by some writers), is a DC Comics supervillain and an enemy of Batman. Created by writer Bill Finger and artist Dick Sprang, he first appeared in Detective Comics #140 (December 1948).

One who speaks in, or propounds, riddles.

One who riddles (grain, sand, etc.).