Abstract: A one-way vent for installation in a panel aperture is described. The vent includes a frame made of a first material, and valve and seal members both made of a second material, which has a lower stiffness than the first material. The frame includes an outer wall for engaging a perimeter of the aperture, and a valve seat extending inwardly from the outer wall. The valve seat defines an opening through the frame. The valve member includes a flap support fixed against a portion of the valve seat, and a valve flap flexibly coupled to the flap support. The valve flap is moveable between a closed position resting on the valve seat to cover the opening, and an open position elevated from the valve seat to uncover the opening. The seal member is fixed against the outer wall of the frame and extends outwardly from the outer wall.

Abstract: According to embodiments described in the specification, a method and apparatus are provided for producing an acoustic component. The acoustic component comprises a first compression-molded member comprising a first material; and a second injection-molded member coupled to and substantially surrounding the first member, the second member comprising a second material.

Abstract: An injection molding die for a mold for fabricating a plastic filter component including a net, at least one supporting rib, and a frame. The molding die includes a plurality of net grooves including a first set of net grooves and a second set of net grooves intersecting at least some of the first set of net grooves. The plurality of net grooves are for receiving plastic for forming the net of the plastic filter component. At least one rib groove is contiguous and in flow communication with at least some of the net grooves. The at least one rib groove is deeper than the net grooves and is for forming the at least one supporting rib subdividing the net into at least two portions. A frame cavity around the net grooves is in flow communication therewith, for receiving plastic for forming the frame. At least one damming device extending into the mold and located to act as a restriction for controlling plastic flow therepast and into at least some of the net grooves.