Fabric feeder mechanism for sewing machine

Claim 1

IN A SEWING MACHINE OF THE TYPE INCLUDING A FRAME SUPPORTING DRIVING MEANS AND A BED PLATE CARRYING A SLOTTED NEEDLE PLATE, A RECIPROCATING NEEDLE DRIVEN BY SAID MEANS, A FABRIC FEEDER HAVING TEETH ROWS MOVABLE IN THE SLOTTED NEEDLE PLATE, AND TWO OPERATING MECHANISM CONNECTING SAID FABRIC FEEDER TO THE DRIVING MEANS OF THE MACHINE, A FIRST OF SAID OPERATING MECHANISM BEING OF A CONSTRUCTION TO DISPLACE THE FEEDER ALONG A LONGITUDINAL TRAJECTORY WHICH IS SUBSTANTIALLY RECTANGULAR AND CONSISTING OF A RAISING PHASE ABOVE THE NEEDLE PLATE, OF A DISPLACEMENT ACTIVE PHASE IN ONE DIRECTION, OF A SINKING PHASE BENEATH THE NEEDLE PLATE AND OF A PASSIVE DISPLACEMENT PHASE IN OPPOSITE SENSE TO THE PREVIOUS ONE, A SECOND OF SAID OPERATING MECHANISMS BEING OF A CONSTRUCTION TO EFFECTUATE A LATERAL DISPLACEMENT OF THE FEEDER IN ONE DIRECTION AT THE SAME TIME AS SAID ACTIVE DISPLACEMENT AND ANOTHER AND OPPOSITE LATERAL DISPLACEMENT IN THE OPPOSITE DIRECTION DURING THE PASSIVE DISPLACEMENT, SO THAT THE FEEDER RETURNS TO ITS STARTING POSITION TO REPEAT THE SAME TRAJECTORIES, THECOMBINATION OF SAID OPERATING MECHANISMS PROVIDING FOR THE FEEDING OF FABRIC IN ANY PRE-FIXED DIRECTION ALONG THE BED PLATE AS A CONSEQUENCE OF THE SIMULTANEOUS LATERAL AND LONGITUDINAL MOVEMENTS, INDEPENDENT CONTROL MEANS CONNECTED TO SAID OPERATING MECHANISMS IN ORDER TO VARY THE AMPLITUDE FROM ZERO TO A MAXIMUM AS WELL AS THE DIRECTION OF EACH ONE OF THE LATERAL AND LONGITUDINAL DISPLACEMENTS OF THE FEEDER FROM A CENTER POSITION.