Machines {sewing machine}| can sew.
needle and thread
Sewing-machine needles have an eye three millimeters from point. Thread comes from spool, through tension control knob, through needle eye. Second thread comes from different spool {bobbin}, underneath needle and material.
process
Needle enters material and goes through to bobbin. Hook snags thread and loops thread around bobbin, to make lock stitch. As needle rises, lever {thread take-up lever} pulls thread tight. The lever also pulls a length of thread from spool. After needle leaves material, a rough plate rises from below, squeezes material between plate and needle guide plate above, and pushes material forward one stitch length.
Practical Affairs>Machine>Kinds>Electromechanical
7-Machine-Kinds-Electromechanical
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224