Thread cutting device for double stitch sewing machines

Claim 1

IN A DOUBLE STITCH SEWING MACHINE OF THE TYPE HAVING A BASE PLATE AND PROVIDED WITH VERTICAL LOOPER SHAFT, AT LEAST ONE NEEDLE, AT LEAST ONE LOOPER SUPPLYING A LOOPER THREAD AND MOUNTED ON SAID VERTICAL LOOPER SHAFT AND A NEEDLE BAR CARRYING AT LEAST SAID ONE NEEDLE SHAFT POSED ABOVE SAID LOOPER AND SUPLYING A NEEDLE THREAD, A THREAD CUTTING MEANS COMPRISING A THREAD CATCHER, MEANS SUPPORTING SAID THREAD CATCHER FOR ROCKING MOVEMENT ALONG A PATH EXTENDING IN HORIZONTAL PLANE ABOVE SAID LOOPER AND BELOW SAID NEEDLE GENERALLY PERPENDICULARLY TO THE AXIS OF SAID LOOPER SHAFT AND A STATIONARY CUTTER MOUNTED PROXIMATE SAID LOOPER FOR COOPERATION WITH SAID THREAD CATCHER SAID THREAD CATCHER HAVING A FRONT PORTION OF V-SHAPED CONFIGURATION DEFINED BY A PAIR OF LEGS ADAPTED TO SIMULTANEOUSLY SEIZE SAID LOOPER AND SAID NEEDLE THREADS, AND HAVING A RECEIVING APERTURE FOR SAID CUTTER AT THE INTERSECTION OF SAID LEGS WHICH ARE DISPOSED IN A VERTICAL PLANE EXTENDING SUBSTANTIALLY PATALLEL TO SAID LOOPER SHAFT AND INTERMEDIATE SAID LOOPER SHAFT AND THE AXIS OF SAID NEEDLE.