PCT No. PCT/GB91/00796 Sec. 371 Date Dec. 18, 1992 Sec. 102(e) Date Dec. 18, 1992 PCT Filed May 21, 1991 PCT Pub. No. WO91/18228 PCT Pub. Date Nov. 28, 1991.A metal bellows for use in a mechanical seal is rolled from a flat sheet and seam welded along an axial diagonal line. The bellows includes corrugations or convolutions having inner and outer crowns of identical radii. The end corrugation or convolution at each end of the bellows is axially compressed to provide an annular double-thickness bearing and support surface against which an end ring is located in face-to-face connection. A similar bellows of multiple plies is similarly constructed using a plurality of tubular bodies.
