Abstract A flexible stringer of integral construction for slide fasteners is shown. The flexible stringer includes a flat flange member and a bead. The bead cross-section is shaped to conform to the area defined by the closure arms of the fastener elements emplaced upon it. The stringer shown includes a substantially flat inner surface which extends outwardly at substantially right angles from the flange. A second right angle is defined at the juncture of the inner and outer surfaces of the bead. In the preferred embodiment the bead comprises a half cylindrical volume symmetrically positioned with respect to the flange and has a cylindrical void located symmetrically within it. A firm holding force between the stringer and the conventional fastener members is obtained.
In a flexible stringer of integral construction for slide fasteners including a flat flange member for attachment to the side of an opening in an article and a bead at one end of said flange member about which slide fastener members are emplaced, the improvement wherein said bead comprises a half cylindrical volume integral with a rectangular volume, the latter being symmetrically positioned with respect to said flange, said bead including a cylindrically shaped void located symmetrically within said bead volume to permit contraction of said bead upon emplacement of said slide fasteners.
Claim 2
Dependent Claim
93 words
In a flexible stringer of integral construction for slide fasteners including a flat flange member for attachment to the side of an opening in an article and a bead at one end of said flange member about which slide fastener members are emplaced, the improvement wherein said bead comprises a half cylindrical volume integral with a rectangular volume, the latter being symmetrically positioned with respect to said flange, said bead including a cylindrically shaped void located symmetrically within said bead volume to permit contraction of said bead upon emplacement of said slide fasteners.
Claim 3
Dependent Claim
26 words
The flexible stringer of claim 1 wherein the ratio of the volume of said void to the volume of said bead is from 1:5 to 4.5.
Claim 4
Dependent Claim
9 words
The stringer of claim 1 formed of polyvinyl chloride.
Claim 5
Dependent Claim
42 words
In a flexible stringer of integral construction as recited in claim 1, the further improvement wherein the cross sectional area of said bead is larger than the area defined by the closure arms of the fastener member, the shape being the same.