METHOD AND APPARATUS FOR MANUFACTURING A THERMOPLASTIC HAVING FASTENER ELEMENTS

摘要

A method and an apparatus for securing fastener elements to a continuous sheet of plastics material in direct conjunction with the extrusion of the sheet and before it has solidified. Fastener elements are stacked in a magazine shaft below which there is mounted a stationary discharge passage extending towards the extruder and curved towards a moving roller or like element mounted below the extruder for receiving and advancing the extruded sheet. A flexible slide having tongues engaging with the fastener elements is reciprocated in a predetermined timing pattern within the discharge passage to take fasteners in sequence from the bottom of the magazine and deliver them unto the roller, which brings them into contact with the plastic film. Stationary tongues are provided in the discharge passage for preventing fastener elements from moving backwards when the slide is retracted.