Selvage forming device for looms

Claim 1

A selvage forming device for a loom having a slay mounted for oscillating movement and functioning to beat-up weft threads inserted into successive warp sheds, the end portions of the weft threads projecting beyond the edge of the outer warp threads of the fabric, the device comprising means adjacent at least one fabric edge for positioning the projecting end portions of the weft thread just beaten up, a rotatable pin positioned at an angle to the perpendicular to the plane of the fabric, a suction tube secured on said pin, for entering each shed formed by the warp threads and retracting therefrom, and a mechanism connecting the suction tube with the slay for imparting the oscillating movement of the slay into oscillating movement of the suction tube in a plane substantially perpendicular to the plane of movement of the slay, said mechanism including a bracket fixed to the slay, a draw bar, a first universal joint connecting one end of the draw bar to the bracket, a single arm lever rigidly fixed on the pin, a sleeve in which the pin is housed, a second stationarily mounted bracket, a second universal joint connecting the other end of the draw bar to the single arm lever, and a bar connecting the sleeve with the second bracket, the arrangement being such that as the suction tube approaches the end portion of the weft thread, the suction therein draws the end of the weft thread inside the suction tube and as the tube retracts from the shed, said end is deposited therein.