Reclosable fastener assembly with slider having separating leg penetrating at least one of uppermost interengaging closure elements but not penetrating bottom closure elements, with abrupt narrowing effect

摘要

Reclosable fastener strips 14,15 have upper and lower inter-engaging closure elements 16a/17a, 16b/17b. Slider 10 passes between upper elements but not lower elements with an abrupt narrowing effect. This is directed at preventing leakage from bags having such fasteners.