Sewing – Work manipulating – Guides
Patent
1977-10-31
1978-09-19
Feldbaum, Ronald
Sewing
Work manipulating
Guides
D05B 3510
Patent
active
041145461
ABSTRACT:
A sewing machine for producing edge parallel seams in workpieces of any contour, includes a sewing machine needle which is reciprocated in a stitch forming area. A workpiece ruler guide extends laterally of the stitch forming area at an angle to a line passing through the needle axis. In addition, there is a workpiece guide mechanism which includes upper and lower guide plates forming a workpiece passage space therebetween which extends alongside the ruler. The upper plate is mounted over the lower plate for upward and downward movement relative to the lower plate and it includes a pressure point for applying a braking action on the workpiece which is effective when a tension member which is engageable with a pressure spring moves in a direction to stretch the pressure spring and increase the tension acting thereon and to urge the lower plate downwardly into engagement with the workpiece. The tension member is movable in an opposite direction to a rest position to decrease the tension on the pressure spring and, at such times, a lifting spring acts on the upper plate and produces an upward lifting force thereon to lift the upper plate.
REFERENCES:
patent: 3794230 (1974-02-01), Bryan et al.
patent: 3875881 (1975-04-01), Marforio
patent: 3905316 (1975-09-01), Mall
patent: 3913507 (1975-10-01), Pollmeier
patent: 4013026 (1977-03-01), Hall
patent: 4019488 (1977-04-01), Marforio
patent: 4075957 (1978-02-01), Marforio
Kirch Otto
Willenbacher Erich
Feldbaum Ronald
Pfaff Industriemaschinen GmbH
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