Patent ID: 11877628
Assignee: YKK CORPORATION
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 0:
1. A watertight fastener comprising:
a pair of fastener tapes (12), each having one surface (12c) and another surface (12b);
fastener elements (16) provided on a side of one end edge part (12a) along a longitudinal direction of the fastener tapes (12), the end edge part (12a) being folded double at a folding line (13) to overlap the one surface (12c), so that the another surface (12b) of the fastener tape (12) is convex and the fastener element (16) being provided on an another surface (12b) side of the fastener tape (12); and
a slider (24) for engaging and disengaging the fastener elements (16), the slider (24) being engaged with the end edge part (12a),
wherein on the another surface (12b) of the fastener tapes (12) on a side opposite to a side on which the fastener elements (16) are provided, a waterproof seal layer (20) with a predetermined width is provided along the longitudinal direction at a position at which the fastener elements (16) are provided, and a width of the waterproof seal layer (20) in a direction orthogonal to the longitudinal direction is narrower than a width of the slider (24), and
the waterproof seal layer (20) does not come into contact with the fastener elements (16), and with the pair of fastener tapes (12) being closed by engagement of the fastener elements (16), end parts (20a) of the waterproof seal layer (20) close to the end edge parts (12a) of the fastener tapes (12) are flushly continuous with the folding lines (13) and shaped to come into contact with each other without overlapping each other in a thickness direction and without a gap to be in close contact in a liquid-tight manner.