The invention is a method and a plotter for automated drawing and writing that provides a drawn line of variable width, where the width is independent of the motion of the plotter pen or the shape of the line drawn. The apparatus includes a plotter having a table for receiving the medium upon which the...http://www.google.com.au/patents/US4905015?utm_source=gb-gplus-sharePatent US4905015 - Apparatus and method for generating a variable line width
