WAIST ELASTIC APPLICATOR FOR DIAPER OR SIMILAR ARTICLE

摘要

The invention is an apparatus for applying a tensioned elastic ribbon or ribbons transversely of a moving web of material. It is particularly well adapted for applying elastic to the waist zones of disposable diapers moving continuously in an end-to-end assembly. The apparatus (20) has a supporting frame (22) with a shaft (28) providing an axis of rotation for at least one rotatable radial arm (44). A polygonal head (40) is mounted at the end of each arm. This has a number of peripheral edges with clamps or vacuum orifices (136) for holding a tensioned strand or strands of elastic ribbon (48). A drive rotates the radial arms (44,45) and a rotating mechanism moves the heads (360/n) DEG for each full rotation of the radial arms (44,45) where n is equal to the number of peripheral faces on the head. An anvil (30) acts against the head at the time of application of the tensioned elastic to the moving web. The web is passed between the head and the anvil along a path describing a chord or tangent of the circle of rotation of the radial arms.