The formation of a bellows made up of a stack of a predetermined number ofring-convolutions and having an intermediate plate supported within said stackisachieved by supplying several thin metal rings, each having inner and outeredges. A pair of these metal rings are positioned in contiguous relationshipandtheir adjacent inside edges are welded together to form a ring-convolution.Thisprocess is repeated until a sufficient number of ring-convolutions are made.Anintermediate plate, a disc of metal sized smaller than the inside diameter oftherings, is secured to a support ring. The support ring is then positionedbetweentwo formed ring-convolutions and the three abutting outside edges are weldedtoeach other to form a support plate convolution. The ring-convolutions andsupport plate convolution are stacked and all not-yet welded adjacent outsideedges are then welded to form the bellows.
