Head for the perforation of laminar elements with formation of collars. (Machine-translation by Google Translate, not legally binding)

摘要

Head for the perforation of laminar elements with formation of collars, in order to the application of tubular branches, characterized essentially by the provision of a drilling tool provided laterally of at least two pressure elements capable of moving to a position protruding from the tool after drilling the hole and in conjugation with the edges thereof, in order to form, by effect of the pressure performed, a collar around the hole during the separation movement of the tool. (Machine-translation by Google Translate, not legally binding)