Verfahren zur partiellen härtung von gedruckten bildern auf transparenten und halbtransparenten medien

Abstract

A printing and partial curing process for 3D objects that avoids print fouling due to scattered UV light. The process uses the steps of expressing an image from an inkjet printing head onto the surface of a rotating piece of transparent media, rotating the media surface along a single rotational axis away from the inkjet printing head to allow full wetting of an expressed image onto the media surface, and further rotating the media surface so that the expressed image enters a shaped ultraviolet illumination beam field that causes the partial curing of the image so that said image is held in place on the surface during continued rotation as additional ink is applied to the surface. The partial curing or "pinning" lamp is precisely positioned so that ultraviolet beam field avoids impinging on the inkjet print heads so that fouling does not occur.