Sewing machine for simultaneous hem stitching and blind stitching
OwnerMasato Sugaharainventor
Life of this patent
Estimating the term…
Abstract
A sewing machine for simultaneously performing hem stitch and blind stitch. The sewing machine comprises a first looper placed above one end of a hem of cloth to be stitched and along the hem reciprocated to cross with a blind needle which is passed through the cloth; and a second looper placed above the hem to be stitched and adapted to move along a loop-like track which resembles the outline of a saddle and syncronizes generally with the reciprocation of said first looper.
Claims11
A sewing machine adapted to simultaneously perform hem stitch and blind stitch, comprising a seam stabilization piece:
- a first looper placed above one side of a hem of cloth to be stitched and along the hem reciprocated to cross with a blind needle which is passed through the cloth;
- a second looper placed above the hem to be stitched;
- and means for moving said second looper along a loop-like closed curve resembling the three dimensional outline of a saddle in synchronism with the reciprocation of said first looper so as to pass said second looper along alternate sides of the hem and crossing between said sides without contacting said seam stabilizing piece.
A sewing machine adapted to simultaneously perform hem stitch and blind stitch, comprising:
- a first looper placed above one side of the cloth hem to be stitched;
- a looper mounting unit, said first looper being mounted on the end of said mounting unit;
- an eccentric rotary body mounted on a driving shaft;
- said body being rotatively fixed to one end of an arm, the other end of said arm being pivotally mounted on one of two levers fixed on respective ends of a shaft pivotally mounted on a frame, the other of said levers being connected through the intermediary of a link with a second arm fixed on one end of a round shaft pivotally mounted on said frame, said first looper unit being fixed to the other end of said second arm so as to reciprocate said first looper in an arch shape crossing with a blind needle which is passed through the cloth;
- a second looper placed above the hem to be stitched;
- and
- means for moving said second looper along a loop-like closed curve resembling the three dimensional outline of a saddle in synchronism with the reciprocation of said first looper so as to pass said second looper along alternate sides of the hem and crossing between said sides without contacting said seam stabilizing piece.
A sewing machine adpated to simultaneously perform hem stitch and blind stitch, comprising:
- a first looper placed above one side of the cloth hem to be stitched;
- a looper mounting unit, said first looper being mounted on the end of said mounting unit;
- a driven crank shaft, in which the crank is connected through a link with a first of two levers fixed on respective ends of a shaft pivotally mounted on a frame, and the said looper mounting unit is fixed to the other end of said shaft so as to reciprocate said first looper in an arch shape motion crossing with a blind needle which passes through the cloth;
- a second looper placed above the hem to be stitched and a seam stabilizing piece;
- and
- means for moving said looper along a loop-like closed curve resembling the three-dimensional outline of a saddle in synchronism with the reciprocal motion of said first looper so as to pass said second looper along alternate sides of the hem and crossing between said sides without contacting said seam stabilizing piece.
Dependencies are inferred from the claim text.