Method for developing a series of shoe lasts distributed on a series of sizes starting from a base last

摘要

The invention relates to a new method for developing a series of shoe lasts starting from a base shoe last provided in a basic shoe size. The method comprises the following steps:gathering the spatial coordinates (xB,yB,zB) of points on the base shoe last (2) of basic shoe size using gauges (15) associated with a first computer means (10) on which CAD programs are run;obtaining, from the spatial coordinates (xB,yB,zB) of points on the base shoe last (2) of basic shoe size, spatial coordinates (xn,yn,zn) of points on at least another shoe last in the seris, by using predetermined calculation formulae entered to said computer means, the socalled grading of lasts;storing, into said storage unit, said coordinates (xn,yn,zn) of points on said at least another shoe last in the series.