US Patent 11185123 Three-dimensional printing along a curved surface

A method and apparatus for printing onto a curved surface of an article are disclosed. An embodiment of a method may include receiving the article and extruding a composite yarn from a nozzle. A method may include attaching the composite yarn to the curved surface by moving the nozzle in a direction aligned with a first axis and a direction aligned with second axis along the curved surface. The first axis may be approximately normal to the print surface and the second axis may be approximately normal to the first direction. The article may be repositioned during printing to accommodate nozzle movement.