1. A brushroll for a vacuum cleaner, comprising:an injection-molded brush dowel having a central rotational axis defining an origin for a first axis extending through the dowel and a second axis extending through the dowel perpendicularly to the first axis to conceptually divide the dowel into quadrants;
two bristle stiffeners integrally molded with the dowel and lying in opposing quadrants, each having a parting line which is radially spaced from and non-parallel to the rotational axis; and
a plurality of stiffened bristles protruding from the brush dowel adjacent to the bristle stiffeners;
wherein the first axis defines a line of draw for a two-piece mold forming the brush dowel and bristle stiffeners.