GB602884A - Improvements in or relating to sealing closures - Google Patents

Abstract

602,884. Sliding-clasp fastenings. GOODRICH CO., B. F. July 6, 1945, No. 17342. Convention date, Feb. 2. [Class 44] A sealing closure of the slide fastener type has flexible sealing strips extending along the edges of the opening, and engaging each other and overlapping the fastener, elements when closed, the sealing strips including lateral portions of resilient material extending around the closed end of the opening, and the slide has a seating surface co-operating with the sealing strips, and is positioned at the closed end when the opening is closed. The closure 15 comprises sealing strips 20, 21 of rubber or like material extending along the margins of the flexible stringers 22, 23. Preferably, the sealing strips are L-shaped in section, having parts 20a, 21a, Fig. 4, secured to the stringers 22, 23, and parts 20b, 21b having tapering edges adapted to overlap and spaced from the fastener elements 24, 25 to allow passage of the upper plate 26 of the slider. To seal the end 19, Fig. 1, of the fastener, the sealing strips extend continuously around the end of the aperture, flaring slightly outwards near the end to accommodate the slider 27, which is formed to co-operate with the strips to provide a seal. A U-shaped stiffening portion 31, Fig. 1, of resilient rubber-like material is preferably provided, united integrally, by bonding or moulding, with stringers and sealing strips, and having a recess 36, Fig. 5, which provides a space for receiving the protruding end of the slider. A U-shaped spring element 39 is preferably incorporated in the portion 31. The slider, Fig. 6, comprises a channelled coverplate 41, an upper plate 26 and a spreader post 42 including a projecting end 42a which fits into the recess 36, Fig. 5, beneath the merged lateral portions of the sealing strips. Slots 45a and 46a may be provided on opposite sides of the slider for pull tabs, allowing manipulation from either side. The upper plate 26 is shaped so as to position the sealing strips in the desired overlapping relation, as shown in Fig. 4, on closing the fastener.