Patent ID: 8905713

Claim:
An article in the form of a substrate, comprising: an inner surface, including an inlet; an outer surface spaced from said inner surface; and at least one row or other pattern of passage holes, wherein each passage hole includes an inlet bore extending through the substrate from the inlet at the inner surface to a passage hole-exit proximate to the outer surface, with the inlet bore terminating in a chevron outlet adjacent the hole-exit, said chevron outlet comprising: a pair of wing troughs extending from the hole exit to a terminus farthest from the hole exit and having one of a substantially elliptical, circular or partially circular cross-sectional shape defining a depth; a common surface region between the pair of wing troughs, wherein the common surface region comprises a valley adjacent the hole-exit; and a plateau adjacent the valley, the plateau including a top surface and at least one front face, wherein the valley extends from the hole exit to the at least one front face of the plateau and below a level of the top surface of the plateau and higher than the depth of the wing troughs and wherein the front face of the plateau is configured to extend only between the pair of wing troughs.