Method, for stamping openings into spaced layers, of a multi-layer profile, involves that as each opening is stamped the stamping is removed to give access to next layer below to be stamped

摘要

To stamp openings (12) in spaced material layers (11a-11c), of a profile (10) with at least three overlaid layers, the stamp punches the hole in each layer in succession. As each layer is stamped, the stamping (13) is removed to give access for the stamp to penetrate the next layer. The unwanted stamping is removed by a mechanical ejector or compressed air.