Forbedret fremgangsmåde og apparat til præcisionsskæring af formark med grafiske områder

摘要

An improved method and apparatus for cutting a graphics area from a sheet of material which includes such graphics area. The method improved involves applying a plurality of registration marks on the sheet at and about the graphics area in predetermined positions at the time the graphics are applied thereto, the plurality of marks including a subset of marks (the subset preferably being a tandem pair of marks) which is applied on one side of the graphics area which are used to determine the position and orientation of the sheet, sensing the locations of the registration marks on the sheet of material at the time of cutting, and cutting the graphics area from the ready-to-cut sheet along a path determined in response to the sensed positions of the registration marks with respect to the graphics area at that time, whereby precise cutting occurs despite two-dimensional distortion of the sheet prior to cutting.