Weft thread cutting device for shuttleless looms

Claim 1

IN A LOOM FOR FABRIC HAVING SUCCESSIVE WEFTS IN WHICH SOME AT LEAST OF THE SUCCESSIVE WEFTS HAVE END PORTIONS WHICH PROJECT LATERALLY ALONG ONE EDGE OF THE FABRIC WHICH ADVANCES THROUGH THE LOOM, A DEVICE FOR SEVERING SAID PORTIONS OF SAID WEFTS ALONG SAID ONE EDGE, SAID DEVICE COMPRISING A ROLLER HAVING A GEOMETRICAL AXIS AND A PERIPHERY FORMED AS A HARD SUBSTANTIALLY CYLINDRICAL SURFACE, SAID ROLLER BEING ROTATABLY CARRIED BY SAID LOOM WITH ITS AXIS SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF ADVANCE OF SAID FABRIC THROUGH THE LOOM AND BEING SO DISPOSED ON SAID LOOM THAT THE PORTIONS OF SAID WEFTS TO BE SERVED PASS SUBSTANTIALLY THEREON DURING THE ADVANCE OF SAID FABRIC THROUGH THE LOOM; A ROTATABLY SUPPORTED DISC HAVING A GEOMETRICAL AXIS AND A PERIPHERY IN THE FORM OF AN EDGE OF SMALL WIDTH, WITH THE AXIS OF SAID DISC PARALLEL TO THE AXIS OF SAID ROLLER, SAID DISC BEING DISPOSED CLOSE TO SAID ONE EDGE OF SAID FABRIC AND AT SUCH A POSITION ON SAID LOOM THAT SAID PORTIONS OF SAID WEFTS TEND TO PASS BETWEEN SAID EDGE OF SAID DISC AND SAID ROLLER DURING THE ADVANCE OF SAID FABRIC THROUGH THE LOOM; MEANS TO RESILIENTLY PRESS SAID EDGE OF SAID DISC AGAINST SAID ROLLER, SAID DISC AND SAID ROLLER THUS FORMING A FRICTIONALLY COUPLED UNIT; AND MEANS TO OSCILLATE SAID FRICTIONALLY COUPLED UNIT TO CAUSE SAID PORTIONS OF SAID WEFTS TO BE REPEATEDLY CAUGHT AND CRUSHED BETWEEN THE HARD SURFACE OF SAID ROLLER AND SAID EDGE OF SAID DISC UNTIL THEY ARE SERVED AT A SMALL DISTANCE FROM SAID ONE EDGE OF SAID FABRIC.