Multihead incisor for lumber, timber and the like

Abstract From the Canadian patent

A multihead incisor for incising at least two sides of lumber or timber and in one pass produces a higher incision density than can be achieved without two or more passes on existing single roll incisors. The incisor comprises at least two sets of incisor rolls, each set having two or more rolls spaced apart in one plane representing a side of a piece of lumber or timber moving in the one plane a first, incisor roll in each set having incising teeth positioned to make a pattern of incisions in the one plane a second, incisor roll in each set, downstream of the first incisor roll, positioned to make a second pattern of incisions over the first pattern of incisions in the one plane and a …