Patent ID: 7337508
Filing Date: 2008-03-04
Classification: A44B,Y10T

Abstract:
1. A zip fastener comprising a pair of tapes having a plurality of coupling elements provided on an edge of each tape, wherein a first element on one tape has a head which bears on a shoulder of an opposed element on the other tape when urged in a first direction transverse to a plane of the tape preventing the head from passing the shoulder of the opposed element in the first direction, and passes the shoulder when urged in a second direction opposite to the first direction; wherein the head of the first element has a first head portion which, in use, engages between head portions of two adjacent opposed elements on the other tape to prevent separation of the tapes in the plane of the tapes, the first head portion bearing on the shoulder provided on the opposed elements, and a second head portion which is smaller than the first head portion and passes the shoulders on the opposed elements.