METHOD FOR TEMPORARY JOINING OF FABRICS AND SMALL-SIZED SEWING MACHINE FOR EFFECTUATING THE SAME Russian patent published in 2006 - IPC D05B1/06 

FIELD: sewing industry, in particular, construction of small-sized sewing machines with single-thread stitch.

SUBSTANCE: method involves introducing curved needle with thread inserted into needle eyelet into fabric layers to be joined; turning needle until it exits fabric at a distance from site where it was introduced, and forming loop from thread by moving said needle in reverse direction; seizing loop by its one side, providing running thereof around other side and drawing it through loop; thereafter, ceasing displacement of needle to the initial position and tightening node; repeating all mentioned steps at distance equal to stitch pitch. Sewing machine has needle guiding mechanism, looper mechanism and toothed rack. Needle guiding mechanism has base, guide fixed on base, rack movable along guide and pivotally connected with needle holder having curved needle. Needle holder is moved relative to rack by means of tie-rod and rack is also movable relative to base by means of tie-rod. Looper mechanism has base pivotally connected to bar, looper provided with nose part, and thread stretching hook with axis of rotation. Base is turned by means of tie-rod and hook is also turned by means of tie-rod. Upon passage of needle through fabric and turning of looper base around axis, looper nose part draws out thread. Once hook is turned, loop is formed, said loop being tightened on thread following it during reversal of needle.

EFFECT: increased precision in forming of single-thread stitch, provision for producing of readily unraveled stitch and reduced intensity of manual labor.

6 cl, 16 dwg