Thread tension device with latch for a sewing machine

Thread tension discs

Thread tension mechanism and sewing machine

Thread tension regulating apparatus for an over-lock sewing...

Thread tensioner

Thread tensioning apparatus for sewing machines

Thread tensioning device for a sewing machine

Thread tensioning device for a sewing machine

Thread tensioning device for a sewing machine

Thread tensioning device for a sewing machine

Thread tensioning device for sewing machine

Thread tensioning device having an electromagnet for applying a

Thread tensioning module for a sewing machine

Thread-tension regulating device for multi-thread sewing machine

Thread-tensioning device, particularly for sewing machines

Thread-tensioning mechanism for the stop motion means of a multi

Upper thread supplying device in sewing machine

Upper thread tension adjusting assembly with automatic release d

Upper thread tension device of a sewing machine