Device for pneumatically tensioning and reversing socks or other manufactured articles, associated with a circular knitting machine for producing the said articles

The device comprises an external tubular casing (7) and an internal element (10-12) for forming an interspace with an annular cross section; both said tubular casing (7) and said internal element (10-12) consist of two sections (7A, 7B; 10, 12) with different diameters, the upper sections (7A, 12) with a smaller diameter being accommodated within the needle cylinder (1), while the lower sections (7B, 10) with a larger diameter are located outside and adjacent to the needle cylinder; an annular discontinuity (D) between the two sections (12, 12A; 10, 10A) of the said internal element is formed so that, after a first phase involving formation with pneumatic tensioning a second phase involving inward turning and reversing can be performed through said discontinuity.