Sewing – Stitch forming – Feeding work material
Patent
1979-10-03
1981-10-27
Feldbaum, Ronald
Sewing
Stitch forming
Feeding work material
112311, 112315, 112320, D05D 2700, D05D 2720
Patent
active
042967031
ABSTRACT:
An apparatus is disclosed which is to be connected to a domestic sewing machine for converting it into one capable of sewing heavier materials and sewing materials having edgewise designs so that the designs are maintained in alignment. The converted machine can also be capable of having an adjustable amount of hook throw. This apparatus includes a member which pivotally connects a needle bar and a feed foot to the sewing machine. The apparatus also includes a member which pivots the connecting member back and forth in a feed direction and a reverse feed direction. So that the workpiece being sewn by the machine will not slip during pivoting in the reverse feed direction, the apparatus also includes a clamp element for retaining the workpiece against a workpiece supporting surface during this time. Additionally the apparatus includes a mechanism which lowers and raises a feed dog when the connecting member has been pivoted to the substantial extremes of the feed direction and reverse-feed direction. The apparatus may also include an element which can be adjustably set to determine the amount of thread thrown by the hook contained in the sewing machine.
REFERENCES:
patent: 2470759 (1949-05-01), Clayton
patent: 3570427 (1971-03-01), Wenz et al.
patent: 3605662 (1971-09-01), Willenbacher et al.
patent: 3935826 (1976-02-01), Nicolay et al.
patent: 3952675 (1976-04-01), Thompson
Dougherty, Jr. C. Clark
Feldbaum Ronald
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