초록 ▼

A method and apparatus for capping a headed stem fasteners. The precursor web having a backing with a rear surface, a front surface, and a multiplicity of polymeric stems projecting distally from the front surface of the backing is fed into a variable nip between a heated member opposite a support s

A method and apparatus for capping a headed stem fasteners. The precursor web having a backing with a rear surface, a front surface, and a multiplicity of polymeric stems projecting distally from the front surface of the backing is fed into a variable nip between a heated member opposite a support surface. The support surface has a shape generally conforming to the contour of the heated member. The variable nip compressively engages the polymeric stems between the heated member and the support surface so that distal ends of the polymeric stems are deformed. The heated member can be a heated roll or a heated belt. The support surface may be a curved capping shoe or a belt shaped to create a particular nip profile.

대표청구항 ▼

1. An apparatus for treating a precursor web, the precursor web having a multiplicity of polymeric stems projecting distally from a front surface of a backing, the apparatus comprising:a heated roll opposite a curved support surface forming a variable nip having a variable nip length, the curved sup

1. An apparatus for treating a precursor web, the precursor web having a multiplicity of polymeric stems projecting distally from a front surface of a backing, the apparatus comprising:a heated roll opposite a curved support surface forming a variable nip having a variable nip length, the curved support surface curving in the direction of the heated roll; and a feeding mechanism for feeding a precursor web through the variable nip to compressively engage the web between the heated roll and the support surface and further comprising means for generating a low friction interface between a rear surface of the precursor web and the curved support surface.