1,151,792. Expansion joint. GARLOCK Inc. 20 May, 1966 [27 May, 1965], No.22455/66. Heading F2G. A tubular expansion joint member, formed of rubber-impregnated fabric plies 16a, 16b and having end flanges 10 joined by cylindrical portions 14 to an annular arched portion 12, incorporates reinforcing rings 22 embedded in said cylindrical portions, each of said rings being formed by a tight winding of glass tape, cord, roving or other elongate glass material. As shown, the rings, preferably of rectangular cross-section, are formed by a spirally-wound glass tape, which is coated with unifying adhesive such as an elastomer, epoxy or polyester cement, and are interspaced by annular blocks 24 of solid rubber or blocks of spirally-wound rubber-impregnated fabric tape. Said blocks oppose axial movement of the rings when the joint is under pressure in use. In modified embodiments, Figs. 3 and 4 (not shown), the reinforcing rings are formed by a winding of adhesive-impregnated or coated glass cord, yarn or roving. In the latter embodiment, only one ring is incorporated either side of the arched portion and each ring is of tapered cross-section. In both the embodiments of Figs. 3 and 4, the innermost corners 26a or 30a of the rings are rounded. In a final embodiment, Fig. 5 (not shown), a single ring 38 of spirally wound broad glass tape extends each side of the arched portion substantially the length of the cylindrical portions 14. The expansion joint member is made by building up the different layers on a rotating, shaped mandrel, the rubber thereafter being cured.