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US 6,681,455 B2Granted
Airtight waterproof slide fastener
AssigneeYKK Corporation
InventorNobuhiro Ichikawa
Life of this patent
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AssigneeYKK Corporation
InventorNobuhiro Ichikawa
Estimating the term…
An airtight waterproof slide fastener having a pair of fastener stringers in which a side edge of an airtight waterproof tape is bent so as to wrap and hold plurality of coupling elements having a coupling heads from a flange side thereof so as to form an engagement tooth holding portion having a substantially Ω-shaped cross section and a peripheral face of that engagement tooth holding portion is nipped and fixed by means of a substantially U-shaped clamp element having of a pair of sheet-like nipping pieces. The clamp element is provided with stress-releasing portions between clamp elements for releasing tensile stress generated in a tape portion existing between side faces of the adjacent nipping pieces when the airtight waterproof tape is bent between the adjacent clamp elements, so as to secure air-tightness and not to be broken easily even if it is bent strongly in its longitudinal direction.
An airtight waterproof slide fastener having a pair of fastener stringers in which a side edge of an airtight waterproof tape wraps and holds a plurality of coupling elements from flange sides, makes their coupling heads project outward, and is folded such that an engagement tooth holding portion having a substantially Ω-shaped cross section is formed on the side edge of the tape and a peripheral face of this engagement tooth holding portion is nipped with a substantially U-shaped clamp element constituted of a nipping portion having a pair of sheet-like nipping pieces and a connecting portion for connecting respective ends of one of the nipping pieces and the other one of the nipping pieces, wherein
Dependencies are inferred from the claim text.