DEVICE OF THREAD FILLING BY GAS FEEDING OF THREAD FOR SEWING MACHINE Russian patent published in 2016 - IPC D05B63/00 

FIELD: sewing.

SUBSTANCE: device of thread filling by gas feeding of thread for sewing machine comprises at least one looper with hollow structure from looper hole for thread input to hole for thread output in place of loop capture, mechanism of thread input into looper for insertion of looper thread, hollow looper thread guide extending from said mechanism of thread input into looper to said looper hole for thread input and having output hole of looper thread guide, gas feed pump for filling said thread into looper from said mechanism of thread input into looper to said output hole of looper thread guide via said hollow looper thread guide by means of thread gas feeding, coupling for energy transfer from sewing machine engine to drive shaft for actuation of stitch-forming device including said looper during stitch formation and said pump of gas supply during looper thread filling, respectively, and mechanism of switching between modes of looper thread filling and stitch forming for switching of said coupling to transfer energy to said pump of gas supply during looper thread filling and to transfer energy to said stitch formation device during stitch formation depending on manual exposure on manually driven element of switching between modes of looper thread filling and stitch formation. Wherein said coupling comprises drive element of gas supply for energy transmission to said pump of gas supply with engaging and gripping ledges, drive element of stitch forming attached to said drive shaft for energy transmission to specified stitch forming device with engaging and gripping ledges, coupling hollow shaft, fastened on said drive shaft and driven by said sewing machine engine and switching sliding sleeve installed on outer periphery of said coupling hollow shaft and connected therewith with possibility to slide to side of drive element of gas supply or to side of drive element of stitch formation depending on manual action on said manually driven element of switching between modes of looper thread filling and stitch formation with engaging and gripping ledges for mutual grip and engagement with said engaging and gripping ledges of drive element of gas supply and saving communication state during connection with said drive element of gas supply and engaging and gripping ledges for mutual grip and engagement with said engaging and gripping ledges of drive element of stitch formation.

EFFECT: as a result to prevent switching to stitch formation mode from mode of looper thread filling during operation of gas supply by gas supply pump safety device is not required, as well as simplified filling threads requiring repetition of small number of times one action by one hand on looper are achieved.

6 cl, 17 dwg