Methods are disclosed for converting on a mass scale elongated material webs into finished parts or devices. Slits form strands in a web, the strands comprising interconnected objects which correspond to parts of finished devices. Strands are combined with additional webs to form a material laminate from which finished devices are die cut. The methods are suitable for a range of converting applications including medical devices, particularly the external nasal dilator. Complex dilator devices produced from the methods are formed as a single body truss having horizontal regions adapted to engage outer wall tissues of first and second nasal passages of a nose. When in use the dilator stabilizes or expands nasal outer wall tissues and prevents the outer wall tissues from drawing inward during breathing. Methods of manufacture comprise separate steps for fabricating and assembling the elements and layers of finished dilator devices and for packaging finished devices individually or in groups. Waste material is incorporated into subsequent fabrication processes to produce the same or complementary devices.鼻拡張器は、鼻の第1鼻腔及び第2鼻腔の外壁組織を係合するように適合された水平方向領域を有する単位の本体トラスとして鼻拡張器を構成する鉛直方向に積層された複数の材料層から成る積層対を有する。トラスは、機能要素と、係合要素と、方向性要素とを有する。使用されるとき、鼻拡張器は、鼻外壁組織を安定化し又は拡張して、その鼻外壁組織が呼吸中に内向きに引き込まないようにする。