Sewing – Stitch forming – Feeding work material
Patent
1982-10-05
1984-05-15
Schroeder, Werner H.
Sewing
Stitch forming
Feeding work material
112320, D05B 2704
Patent
active
044481403
ABSTRACT:
A top feed arrangement for cooperation with a lower feed dog of a sewing machine, the lower feed dog cyclically engaging and disengaging the lower surface of material to be sewn in order to move that lower surface along a predetermined path through and past the sewing machine. The top feed arrangement comprises an upper feed dog carried by an arm that is linked to an oscillatory take-off from the primary drive system of the sewing machine. The arm is connected to the device at one end in a pivotal connection and the upper feed dog is carried at the other end of the arm. The arm is resiliently urged in a direction to cause the upper feed dog normally to approach the lower feed dog. A lifter device also responsive to the primary drive system of the sewing machine, periodically moves the upper feed dog in a direction away from the lower feed dog against the resilient force. The linkage from the sewing machine drive to the top feed is housed in a recessed area removed from the work and an uncluttered large work area is provided.
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patent: 4166422 (1979-09-01), Porter
patent: 4285294 (1981-08-01), Aida
Falik Andrew M.
Schroeder Werner H.
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