Method for automatically generating a chenille filled emproidery stitch pattern

In a method for automatically generating filled embroidery switch patterns in a computer aided design system comprising a computer means capable of generating embroidery stitch patterns for controlling an embroidery machine in accordance with a selected embroidery stitch pattern, wherein said filled embroidery stitch patterns comprise filled embroidery stitch patterns having a polygon type shape and an associated fill density;

• the improvement comprising the steps of:
• selecting an embroidery stitch pattern for said computer means to generate for controlling said embroidery machine, said selected embroidery stitch pattern having an associated polygon type shape having an outer edge;
• constructing a plurality of spaced apart polygon type shapes in said computer means which are concentric to said selected polygon type shape, said computer constructed polygon type shapes being spaced apart from an adjacent concentric polgon type shape by a predetermined distance comprising a determinant of the fill density associated with said selected polygon type shape;
• said concentric polygon type shape constructing step comprising the step of constructing an elementary offset element for each said polygon shape;
• sorting said constructed concentric polygon type shapes in said computer means in order for providing for proper sequencing and minimal jumping of said selected stitch pattern in said embroidery machine from one part of said associated shape to another part of said associated shape;
• generating a plurality of spirals of varying size in said computer means and placing said computer generated plurality of spirals of varying size in said embroider machine along said computer constructed concentric polygon type shapes for maintaining a consistent filling of the area contained within said associated shape of said selected pattern, the spirals having an associates size and distance in said embroidery machine between the focal points from one spiral to the next comprising another determinant of said fill density associated with said selected polygon type shape;
• and
• stitching along said plurality of placed spirals in said embroidery machine for creating thread loops for providing a chenille type stitching for filling said selected polygon type shape;
• whereby a chenille filled embroidery pattern is automatically generated for said embroidery machine under control of said computer means in said computer aided design system.