Patent ID: 7565872

Claim:
A double chain stitch sewing machine with a machine upper section ( 10 ) and a machine lower section ( 12 ), which sections between themselves define a sewing product plane ( 14 ) and are moveable in synchronism parallel to said plane, the machine upper section ( 10 ) having a needle rod ( 18 ) movable perpendicularly to the sewing product plane ( 14 ) for holding a needle ( 20 ) and the machine lower section ( 12 ) having a hook ( 40 ) cooperating with the needle ( 20 ) for forming stitches, which hook is movable back and forth in a plane parallel to the movement direction of the needle rod ( 18 ), characterized in that at least one needle stabilizer ( 42 , 44 ) is arranged in the lower machine section ( 12 ) and is movable in synchronism with the needle rod movement and the hook movement between a first position near the needle path, in which first position it supports the needle ( 20 ) plunging into the sewing product against a deflection laterally to the movement path of the hook ( 40 ), and a second position remote from the needle path, and further characterized in that a loop spreader ( 58 ) provided in the machine lower section ( 12 ) is movable in a plane parallel to the sewing product plane ( 14 ) in two directions in synchronism with the needle rod movement and the hook movement, the loop spreader ( 58 ) being guided for slidable linear movement in a guide piece ( 60 ) and being connected with a first eccentric drive ( 66 ), the guide piece ( 60 ) being pivotal back and forth about a pivot axis ( 68 ) by a second eccentric drive ( 74 ).