Sewing machine with swingable stitch forming unit
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United States of America Patent
Stats
-
Mar 17, 1992
Grant Date -
N/A
app pub date -
Nov 19, 1990
filing date -
Apr 9, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sewing machine with a pivotable stitch formation unit is provided such that it is possible to form a straight stitch or a zigzag stitch seam without loop stitches occurring on the fabric. The fabric is displaceable under the needle without rotation because of a pivoting arrangement of the head and the shuttle holder. The arrangement allows the sewing machine to be switched over from a straight stitch to a zigzag stitch operation due to the adjustment of the oscillation frequency of the needle bar holder relative to the oscillation frequency of the needle bar by means of a multistep shifting gear.
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