Sewing machine work piece turning device
AssigneeKoch Adler AG
InventorsGunter Landwehr, Horst Meyer
Life of this patent
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Abstract
A sewing machine has a feed for the workpiece which is to be sewn. A workpiece conveyor performs a skipping feed movement below the workpiece. Above the workpiece a turning device enables the workpiece to be turned about an axis which is coincident with the needle. In order to sew in an edge-parallel manner with an automatic guidance, workpieces made from soft materials with curved or angular seam courses, may be turned responsive to air nozzles directed in acutely-angled manner on to the supporting plate. The air nozzles are arranged tangentially, and in spaced manner, with respect to the needle.
Claims15
A sewing machine having a sewing station with at least a needle and a presser foot, means including a four motion feeding dog for feeding a workpiece past said sewing station, a supporting plate positioned near said needle and having a guide edge for orienting said workpiece relative to said needle, turning means comprising an air chamber positioned above said work piece for turning said workpiece about an axis coinciding with the needle, a plurality of air nozzles leading from said air chamber for directing air jets from said nozzles in a spaced manner which is tangentially directed with respect to said needle and in an accutely angled manner toward said support plate, and means for pivotally moving said air chamber toward and away from said workpiece.
Dependencies are inferred from the claim text.