Pressure cylinder with variable configuration axis

Claim 1

A printing machine cylinder (1) comprising a stationary central shaft (2) having an intermediate portion (28) and end portions (3); a hollow outer roll (14) surrounding and spaced from said central shaft (2), first bearing means (7) on said end portions of said central shaft rotatably supporting said outer roll on said central shaft; said hollow outer roll having an inner tubular jacket (15) having its inner cylindrical surface (17) formed with a recessed central portion (18), a resilient tubular sleeve (16) surrounding and in contact with the exterior surface of said inner tubular jacket; a bush (33) having an eccentric axial bore (44) mounted with radial play on said intermediate portion (28) of said central shaft (2) and within said hollow outer roll (14), said bush having a central portion (38) with an enlarged diameter relative to its ends, means axially and angularly fixing said bush (33) with respect to the said central shaft (2) so that said enlarged diameter central portion is radially aligned with said recessed central portion on the inner cylindrical surface of said outer roll, bearings means (43) between the outer surface of said bush (33) and inner cylindrical surface (17) of said hollow outer roll (14), said second bearing means being located at the ends of said enlarged diameter central portion of said bush and said recessed central portion on the inner cylindrical surface of said hollow outer roll; and deformable means (47) which can be dilated by a pressurized fluid interposed between said bush (33) and said shaft (2).