SET OF LOOP-FORMING SINKER CONTROL CAMS FOR CIRCULAR-KNITTING MACHINES FOR PRODUCING COMMON LOOP KNITTED FABRICS AND LAYERED LOOP KNITTED FABRICS

摘要

In the present invention, there is disclosed a set of cams for actuating the lowering sinkers (2, 3, 4) in circular knitting machines, for producing standard-terry knitting and sandwich-terry knitting. The proposed cam set comprises cams (20) and counter cams (21, 22, 23), which form a path (1) for the heels (2a, 3a, 4a) of the lowering sinkers (2, 3, 4), which have two lowering planes (7, 8, 9) arranged at mutually different elevations for at least two yarns (60, 61) that are dispensed at a feed of the machine to form loops of terry knitting. The cam set also comprises, in the region of the path (1) that corresponds to the descent of the needles (10) of the needle cylinder (6) to form loops of knitting with the two yarns (60, 61) dispensed at a feed of the machine, a cam (40) which can move on command into two operating positions in order to produce at least one variation of the path formed by the cams and counter cams. The movable cam (40) has a first profile (40a), which can be engaged by the heels (2a, 3a, 4a) of the lowering sinkers (2, 3, 4), and is suitable to produce, when the movable cam (40) is in a first one of the two positions, a spacing of the sinkers from the axis (6a) of the needle cylinder (6) with respect to the path (1) in order to move the yarn, rested on the lower lowering plane of the lowering sinkers (2, 3, 4) away from the axis (6a) of the needle cylinder (6).