초록 ▼

An improved cast process and apparatus for fusing closure elements, particularly those with thickened bases, to separately extruded film or sheet stock for making containers with integral reclosable closures. The process is applicable to webs of film which contain more than one pair of closure eleme

An improved cast process and apparatus for fusing closure elements, particularly those with thickened bases, to separately extruded film or sheet stock for making containers with integral reclosable closures. The process is applicable to webs of film which contain more than one pair of closure elements. The web is split immediately adjacent the die exit between adjacent pairs of closure elements to achieve a film having essentially erect closure elements and associated ribs should they be included. The process also permits beaded edges along both sides of the film. Improved containers can thus be produced.

대표청구항 ▼

A film containing integrally extruded reclosable fastener profiles wherein each of the fastener profiles contains a base thicker than said film and is substantially perpendicular to the surface of the film and wherein said film has thickened edges along each of the sides thereof, said thickened edge

A film containing integrally extruded reclosable fastener profiles wherein each of the fastener profiles contains a base thicker than said film and is substantially perpendicular to the surface of the film and wherein said film has thickened edges along each of the sides thereof, said thickened edges being thicker than both said base and film and extending from said surface of the film in the same direction as said fastener profiles.