Strip matter cutting device for sewing machine

A strip matter cutting device for a sewing machine comprising:

• a strip matter cutting unit having a cutting part for cutting a strip matter sewed on an object in its width direction;
• a cutting part shifting means for shifting the whole of said cutting part between a cutting action position closely adjacent to the rear of a needle location on the top surface of a sewing machine bed, and a non-action position at which said cutting part is retracted upwardly from the top surface of said sewing machine bed such that said object transferred along the top surface of said sewing machine bed is free to pass through said needle location;
• a driving means for driving said cutting part to effect cutting at said cutting action position;
• and
• means for holding said cutting part in a driving state for cutting over a given time immediately after it is shifted from said cutting action position to said non-action position.

A strip matter cutting device for a sewing machine comprising:

• a strip matter cutting unit having a cutting part for cutting a strip matter sewed on an object in its width direction;
• an optical sensor to detect the presence of an object to be sewed attached to the sewing machine arm via an adapter plate;
• a cutting part shifting means for shifting the whole of said cutting part between a cutting action position closely adjacent to the rear of a needle location on the top surface of a sewing machine bed, and a non-action position at which said cutting part is retracted upwardly from the top surface of said sewing machine bed such that said object transferred along the top surface of said sewing machine bed is free to pass through said needle location;
• a driving means for driving said cutting part to effect cutting at said cutting action position;
• and
• means for holding said cutting part in a driving state for cutting over a given time immediately after it is shifted from said cutting action position to said non-action position.