Sewing machine - has guide for needle thread loop formed out of U=shaped cam, whose sides run parallel to circulation plane of feed dog

摘要

A sewing machine incorporates a laterally deflecting needle, a feed dog located below a stitch plate, and a guide component for the needle thread loop. The component is formed out of a U-shaped cam and the cam sides run in parallel to the circulation plane of the feed dog. The rear cam side is located behind the rear boundary plane of the stitch plate slit. The end plane of this side, located in the slit area, forms a guide plane for the thread loop. The plane runs at an acute angle in relation to the feed direction and is directed towards the other end plane. ADVANTAGE - The needle thread loop is seized and expanded reliably and at the right moment.