Patent ID: 6929765

Claim:
A method of injection molding a spacer comprising a perimeter defined by an outer peripheral edge and an inner peripheral edge and having a surface with a sealing member extending therefrom, wherein the inner peripheral edge defines a space disposed inwardly from the outer peripheral edge, and a mesh extending across the space and coupled to the inner peripheral edge, including the steps of (a) providing a mold having a cavity and a core, the cavity having a first interior surface and a first continuous ridge depending from the first interior surface, the core having a second interior surface and a second continuous ridge depending from the second interior surface and aligned with the first continuous ridge, wherein at least one of the first and second interior surfaces includes an impression configured to effect formation of the sealing member on the spacer; (b) positioning a mesh having opposite sides between the cavity and the core such that, when the core and the cavity are clamped together, the mesh does not interfere with the formation of the sealing member upon injection of plastic material into the mold; and (c) pinching opposite sides of the mesh between the ridges to form a flow barrier.