Device applicable to sewing machines for use in darning perforations (Machine-translation by Google Translate, not legally binding)

摘要

A device applicable to sewing machines for use in darning perforations, which consists essentially of a sleeve applicable to the end of the needle-carrying stem in sewing machines equipped with a helical spring-shaped appendix of sufficient length for the descending the needle is applied against the plate of the machine tying the two threads that are horizontal on it so that the binding of both threads can be produced by that needle in ascent and descent, even when the fabric is absent. (Machine-translation by Google Translate, not legally binding)