Abstract: The relative position of a plurality of holes through a surface of a member, the holes having been generated by high energy means, such as a laser, which vaporizes material of the member to produce a light flash, is inspected and controlled as the holes are being generated using a light sensing means which is responsive to the light flash and which observes the relative positions of the holes being produced. The light sensing means signals a hole pattern comparison means which compares the actual hole pattern with a preselected hole pattern. Adjustment can then be made to reposition the high energy beam if required to correct undesirable error in the actual hole pattern during generation of the holes.

Abstract: A plurality of cooperating members of an article are heat bonded at interface surfaces through use of a bonding material at such surfaces and fluid pressure, such as through a resilient, single- or multi-compartment closed member, applied through a flexible heating blanket. Heat is applied at least partially through the heating blanket and preferably through the blanket and through a backing member, such as a mold, which carries heating means.