Abstract: A looper lubricating device for a sewing machine includes an oil line having an inlet submerged within an oil supply and a capillary member within the oil line at a spaced location from the inlet and the oil supply. An outlet of the oil line is in fluid communication with an injection nozzle and the capillary member protrudes through the outlet of the oil line into a mixing chamber within the injection nozzle. A gas conduit communicating with the mixing chamber is operative to intermittently produce a pressure gradient between the inlet and the outlet of the oil line to pass oil to the mixing chamber.

Abstract: A sewing machine for wrapping button shanks comprises a holder for a workpiece to which a button is attached by means of shank loops. To adjust the work holder to the length of the shank loops, two spaced apart holding elements are provided by which the work is separated from the button and which can be positioned at the desired distance from each other. To cut the sewing thread, a cutting blade is displaceable in one of the holding elements and the cutting edge of the blade is movable transversely to the needle path, between the inserted shank loops and a rotary hook.