| 摘要 |
834,430. Sliding clasp fasteners. GOODRICH CO., B. F. Aug. 1, 1956 [Aug. 15, 1955], No. 23710/56. Class 44 A flexible sealing closure for a slide fastener comprises a pair of overlapping sealing elements 22, 23, the one element 23 having a surface 44 extending laterally to one side of the centre line of the closure and inclining upwardly at an acute angle to the plane of the closure, the other element 22 having a thin edge 50 and a sealing surface 49 which both engage the surface 44 when the closure is sealed. As described, rubber sealing elements 22, 23 extend longitudinally in continuous strip form and are mounted upon the fabric stringers 24, 25 and the teeth 28, 29 of a slide fastener. The sealing elements are moulded upon and bonded to the upper faces of the teeth, and may partially extend between adjacent teeth. The sloping surface 44 of the element 23 is inclined to the plane of the stringers at an angle between 30 and 60 degrees, and extends outwardly approximately from the centre line 34b of the interlocking parts 37 of the teeth 29. An underface 46, inclined at about 15 degrees to the stringer plane, meets the surface 44 in the edge 45, and the outer face 53 of the element is inclined at its upper edge for slider clearance. The sealing element 22 is similarly mounted and terminates in a tapered portion 48 which extends inwardly from the centre line 34a and is bounded by the surfaces 51, 49 which meet in a blunt edge 50; the lower surface 49 is inclined to the stringer plane at an angle between 0 and 45 degrees, the angle being less than the inclination of the surface 44 by between 15 and 35 degrees. The upper end of the closure is sealed by a top stop 60 comprising a U-shaped body, mounted upon and spanning the stringers, and having ribs 62, 63 on its upper face which when the closure is sealed, seat against and are compressed by the inner face of the upper plate of a slider which, during operation, embraces both the teeth 28, 29 and the overlying parts of the sealing elements 22, 23. Specification 607,586 is referred to. |
