LOCHER, INSBESONDERE ZUM STANZEN VON LOECHERN IN PAPIERBOEGEN ODER DOKUMENTE

摘要

A perforator of the kind having a die and a slidable punch for piercing holes in sheets of paper or similar documents intended to be placed in a file or binder with openable rings. The perforator is constructed so that it can be temporarily fitted to each ring of the file or binder for the purpose of piercing a hole accurately aligned with the ring.