Method and apparatus for producing registered multiple overlay architectural drawings in a computer aided drafting system

摘要

Pre-punched drafting sheets are placed in a pin registration bar and pin holes are marked or punched in the lower corners of the sheets at locations with fixed reference to the registration holes. The sheets are then loaded into a CAD pen plotter and the plotter is used to precisely locate and store the location of the 2 pin holes as the plot beginning and X-axis alignment points.