US PATENT SUBCLASS 112 / 159
.~.~.~ Shifting looper

Current as of: June, 1999
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112 /   HD   SEWING

154  DF  STITCH FORMING {17}
157  DF  .~ Zigzag {3}
443  DF  .~.~ Vibrating needle {9}
159.~.~.~ Shifting looper

DEFINITION

Classification: 112/159

The looper (either chain or lock stitch) is shifted with the

needle.