Plotter Pen Article - Page 1

This article is from the September, 1990 issue of Computer-Aided Engineering magazine.  It discusses the issues associated with maintaining plotter pens.  This 2 page article shows how big an issue this was at one time and how much time and resources were expended addressing this problem.  This article should help current users understand how the technology has changed as well as providing some insight into the history of producing drawings with CAD systems.