Patent ID: 7670522
Filing Date: 2010-03-02
Classification: A44B,Y10T

Abstract:
1. A method of forming a unitary fastener comprising the steps of: extruding a thermoplastic resin in a machine direction through a die plate having a continuous base portion cavity and one or more rib cavities extending from the base portion cavity; forming a thermoplastic strip having a continuous base layer and continuous ribs integral with the continuous base layer; cutting the continuous ribs and at least one surface of the continuous base layer without cutting through the continuous base layer, the cut ribs forming predetermined separable projections integral with the continuous base layer and the cut surface of the base layer forming predetermined separable surface elements on the continuous base layer; and inelastically stretching the thermoplastic strip to separate the separable projections and the separable surface elements across the thermoplastic strip, the continuous base layer extending between adjacent separated surface elements comprising an oriented film, wherein upon inelastically stretching the thermoplastic strip, the continuous base layer is not torn.