Folding method and device

A method for folding airbags has each airbag (12) positioned inside an outer wrapping bag (14), with both bags in the extended, flattened state. The bags are placed between parallel plates (27, 28) and the airbag is evacuated via a suction pipe (18), to fold into a concertina shape limited by the plates. The outer wrap is pulled in to compress the concertina folds and to complete the compact pack.