It is the most suitable for shirring with elastic thread. Sewing is done, the elastic thread passing through between the upper thread and the lower thread and being swung horizontally on this side of the presser foot. As the elastic feeding device is located on the inside of the cloth plate, sewing is done smoothly. In the conventional way, the elastic thread is used for the lower thread for elastic shirring. Accordingly the only special elastic thread has been used and enough elasticity has not been obtained when finishing. With this machine beautiful finishing making the most of the specific character of the elastic is obtained. (When elastic thread is not used, he function is same as that of DTN-2120 1/4. ).Production classification model species:DTN + SS / Special Shirring (Elastic Inserting Machine witn Puller)。Current production models:DTN-12 1/4" SS，DTN-16 3/16" SS， DTN-21 1/4" SS。