Sewing – Special machines – Darning
Patent
1976-07-06
1978-07-04
Hunter, H. Hampton
Sewing
Special machines
Darning
11212126, 11212129, 112147, 112153, D05B 2100, D05B 3300, D05B 3510
Patent
active
040982041
ABSTRACT:
A tubular workpiece is fed toward a stitch forming means while forcing the marginal edge portion of the workpiece upwardly against an annular peripheral portion of a rotatable guide plate and then across an upper flat surface of the guide plate. This action automatically forms a substantially Z-shaped fold in the marginal portion of the workpiece. This fold is both interiorly and exteriorly guided so that the fold is formed into a triple-thickness hem which is thereafter sewn by the stitch former. The edge of the marginal portion of the workpiece is maintained in a predetermined alignment with respect to the direction of feed of the workpiece by rotating the guide plate in either the clockwise or counterclockwise directions. When the initial portion of the sewn hem of the tubular workpiece returns to a position adjacent the guide plate, the marginal portion of the workpiece is no longer forced against the annular peripheral surface of the guide plate, and also the interior guiding of the fold is discontinued, thereby preventing jamming of the initial sewn hem portion. A predetermined time after the detection of the initial sewn hem portion, the exterior guiding of the fold is stopped, and the guide plate is rotated in a clockwise direction to remove the hemmed workpiece from the guide plate.
REFERENCES:
patent: 2952227 (1960-09-01), Hale et al.
patent: 3182619 (1965-05-01), Sally
patent: 3609373 (1971-09-01), Desai et al.
patent: 3650229 (1972-03-01), Rovin
patent: 3693561 (1972-09-01), Hrinko et al.
patent: 3722441 (1973-03-01), Kitchener et al.
patent: 3752100 (1973-08-01), Sharp
patent: 3783805 (1974-01-01), Guichard
patent: 3865058 (1975-02-01), Rovin et al.
patent: 3890911 (1975-06-01), Babson et al.
Hunter H. Hampton
Yamato Mishin Seizo Kabushiki Kaisha
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