Abstract: A molded plastic grass catcher for a lawn mower or the like. The catcher is formed from a two piece construction so that it may be shipped in a compact, knocked-down condition but easily assembled by the ultimate user. The housing is configured with a pair of air outlets that are disposed out of the path of discharge from the mower discharge chute so as to permit the free exit of air while at the same time precluding the discharge of grass. In some embodiments of the invention, a baffle is also positioned between the inlet and outlet so as to further add in the grass separation without restricting the air flow.

Abstract: A method of blow molding a component that is to be assembled from a plurality of pieces to insure that apertures used to secure the pieces together are accurately located and effectively formed. The two pieces to be joined are molded in the same mold cavity and are held in a predetermined longitudinal position relative to each other in the mold cavity and which location corresponds to the assembled location of the pieces. The pieces are simultaneously apertured while the molded plastic is still warm by punches that are affixed to a common actuating member. This insures that the parts will fit well when assembled.