SEWING MACHINE CONCEALED SEAM MECHANISM Russian patent published in 1994 - IPC

FIELD: tailoring. SUBSTANCE: sewing machine concealed seam mechanism has a plate type bending tool to bend stitched material in direction of round type trajectory of a bent needle movement. The bending tool is being moved along a surface, that is perpendicular to the trajectory of movement of the bent needle, by a driven shaft, perpendicular to the surface. The material bending tool is capable to swing in a spline of a spaced from the driven shaft carrying member around a parallel line to the driven shaft axis and is loaded by a spring in direction from the driven shaft. To get a specially narrow structure of the material bending device a torsion spring is used. The spring is located in a driven shaft hole, that has enough space for the spring. EFFECT: mechanism is used in sewing machines. 15 cl, 5 dwg