Industrial sewing machine for simultaneously making different seaming patterns

An industrial sewing machine comprising a supporting frame supporting a main driving shaft (1) rotatively driving two rotary driven shafts (4,5), cam means supported on one of said driven shafts and driving in a horizontal plane through mechanical operating means, a horizontal needle bar (13), said cam means further driving fabric transporting grippers and hook elements the other of said driven shafts driving a vertical needle bar, said vertical needle bar being displaced in a vertical plane and arranged downstream with respect to said horizontal needle bar, said horizontal and vertical needle bars being so spaced from one another as to make two simultaneous seaming lines, said cam means including a first cam member (8), a second cam member (16), and a third cam member (23), said first cam member (8) through a first connecting rod (9) a first ball joint (10) and a first swinging pivot pin sleeve (11) operates a first lever (12) for controlling said horizontal needle bar (13), said second cam member (16) through a second connecting rod (17), a second ball joint (18), and a second swinging pivot pin (20) and sleeve (19), drives a trimming knife (21) supported on a trimming knife supporting arm (21'), said third cam member (23) through a third connecting rod (24), a third ball joint (25) and a sleeve (26), drives a first swinging pivot pin (27) which, through a second lever (27'), in turn drives a second swinging pivot pin (28), said first and second pivot pins bearing a fourth and a fifth cam member synchronously driving two gripper bearing slides (31, 32).