Epinetron. Placed over the knee, an epinitron provided a firm surface for working wool. These two examples date in the last quarter of the 5th century B.C ... Craig Mauzy ... Horizontal (normal) ... 27 Sep 2004 ... Placed over the knee, an epinitron provided a firm surface for working wool. These two examples date in the last quarter of the 5th century B.C.