Sewing machine with an upper transport mechanism

Details Sewing machine with an upper transport mechanism Sewing machine with an upper transport mechanism

1988-07-26

1990-06-26

Falik, Andrew M.

Sewing

Stitch forming

Feeding work material

112311, D05B 2704

Patent

active

049362356

ABSTRACT:
A sewing machine with an upper transport mechanism includes an arrangement with a pressing foot and a transport foot wherein the mass accelerations due to the movement of these members is reduced. A triangular lever member is provided with lever arms 34b, 34c which are linked with the presser foot and upper transport foot. The triangular lever member is linked so as to be angularly movable to an extent of the respective lever arms. Connecting rods of the presser foot and the upper transport foot are connected to the lever arms and are driven thereby. The movement of the connecting rods and the lever arms reduces the mass force of the respective transport foot and the presser foot. To further reduce the mass forces, the upper transport foot and the presser foot are spring loaded with respect to respective carrying elements of the upper transport foot and presser foot so that a damping action occurs.

REFERENCES:
patent: 3828704 (1974-08-01), Von Hagen et al.
patent: 3935826 (1976-02-01), Nicolay et al.
patent: 4116145 (1978-09-01), Nicolay
patent: 4341172 (1982-07-01), Thompson
patent: 4422398 (1983-12-01), Dusch

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