Patent ID: 6883210

Claim:
A closure device comprising a first fastening strip and a second fastening strip arranged to be interlocked over a predetermined length, said fastening strips have a longitudinal X axis, said fastening strips have a transverse Y axis, said transverse Y axis is perpendicular to said longitudinal X axis, said fastening strips having a vertical Z axis, said vertical Z axis is perpendicular to said longitudinal X axis, said vertical Z axis is perpendicular to said transverse Y axis, said first fastening strip includes a first offset and a first lower flange, said second fastening strip includes a second lower flange, a slider which slidably engages said first and second fastening strips, said slider facilitates the occlusion of said fastening strips when moved towards a first end of said fastening strips and deocclusion of said fastening strips when moved toward a second end of said fastening strips, said slider includes a first shoulder and a second shoulder, said first shoulder and said second shoulder define a slot, said first offset prevents removal of said slider from said fastening strips through said slot in said vertical Z axis; and wherein said first shoulder includes a first concave surface and said second shoulder includes a second concave surface, said first and second concave surfaces extending along said longitudinal axis, and said first and second lower flanges respectively engaging said first and second concave surfaces at a bottom end thereof when said slider is positioned in at least one intermediate position between said first and second ends such that said first and second fastening strips are respectively pivotally movable about each bottom end of said first and second lower flanges.