Sewing machine for producing curved edge parallel seams

Details Sewing machine for producing curved edge parallel seams Sewing machine for producing curved edge parallel seams

1981-12-08

1984-01-03

Hunter, H. Hampton

Sewing

Elements

Frames

112153, 112308, D05B 9700, D05B 3510

Patent

active

044236905

ABSTRACT:
A sewing machine with guide mechanism for automatically producing a curved edge parallel seam comprises a scanning unit for scanning the edge of a workpiece and sensing when the edge of the workpiece moves away from an edge guide which indicates the presence of a curved edge, a workpiece feeder for feeding the workpiece along the guide edge, a workpiece pressure stamp for applying pressure on the workpiece at a point spaced from the guide to cause rotation of the workpiece about the point when the pressure stamp is activated and a circuit connected between the scanning unit and the pressure stamp for intermittently activating the pressure stamp when the scanner senses the presence of a curved edge area of the workpiece.

REFERENCES:
patent: 3970017 (1976-07-01), Babson et al.
patent: 4100864 (1978-07-01), Babson et al.
patent: 4135460 (1979-01-01), Boitteau
patent: 4296700 (1981-10-01), Jehle et al.
patent: 4312286 (1982-01-01), Boitteau

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