An apparatus for cutting labels or other material in a program-controlled plotter comprising a blade affixed in a shaft which, in turn, is rotably held in a shell which can be mounted in a plotter. Advantageously, the blade is mounted so that the cutting point is not on axis with the center line, but...http://www.google.de/patents/US5438896?utm_source=gb-gplus-sharePatent US5438896 - Knife pen for program-controlled plotters
