CONTINUOUS CASTING OF STRINGER FOR SLIDING FASTENING FASTENER

摘要

The continuous casting of scoops upon tapes for a sliding clasp fastener which includes two casting rollers with peripheral cavities and an extrusion nozzle with juxtaposed tapes introduced between the nozzle and a first one of the rollers. The arrangement is such that molten plastics is introduced by the nozzle firstly into the cavities of the first roller ahead of the nip between the rollers and subsequently into the cavities of the second roller adjacent the nip. To ensure adequate solidification of the scoops before removal from the second roller the tapes are drawn off from said second roller at an angular position thereof beyond the nip.