本縫差動送りミシンによるシームパッカリングの防止方法 送り歯形状の変更によるパッカリングと歯きずの防止効果
A Preventive Method Against Seam Puckers by Using a Differential Feed in the Lockstitch Sewing Machine

Kikuko Nakano, Kôzô Shimazaki
1984 JOURNAL of the JAPAN RESEARCH ASSOCIATION for TEXTILE END-USES  
A preventive method against seam puckers by using a differential feed in the lookstitch sewing machine has been studied. The results obtained were as follows :(1) The differential feed mechanism was effective on the prevention of seam puckers. The seam shrinkage ratio was affected by the differential feed ratio and the pressure of a presser foot. Especially in the case of fabrics with a stretchability the satisfied results were obtained. But the feed marks were observed near a seam line in the
more » ... ase that the fabrics have low elastic recovery and high movability of woven yarns. (2) As shown in Figs. 4((i )-(iii)), the shapes of feed dogs were changed so that the differential feed effect concentrates on a seam line. These feed dogs were very effective on the preventions of seam puckers and feed marks. (3) The uniformity of stitch pitch in a seam was not degraded by using the feed dogs mentioned above.
doi:10.11419/senshoshi1960.25.118 fatcat:if46psnmnbauzmywvva23smwzi