Fabric Feed of a Sewing Machine at Low Speed of the Crank Shaft

  • Horino Tsuneo
    Department of Textile Engineering, Kyoto University of Industrial Arts and Textile Fibers
  • Kawanishi Sadako
    Department of Clothing Science, Mukogawa Women's University

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Other Title
  • 低速時におけるミシンの布送り
  • テイソクジ ニ オケル ミシン ノ ヌノオクリ

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Abstract

A laboratory apparatus has specially been designed to investigate the feed length of upper and lower fabrics, the pick up tension of these fabrics caused by a feeding motion of the feed dog and pressure of the presser foot for a household sewing machine in a sewing operation without sewing threads.<BR>The experiments for fabric feeding were carried out under a fixed crank shaft speed of 4 rpm with six kinds of fabrics having different factors such as thickness and fabric structure. Moreover, in order to vary the frictional force between upper fabric and presser foot surfaces and that between lower fabric and feed dog surfaces, three kinds of presser feet and two kinds of feed dogs which were made of different materials, were used in the experiments.<BR>Experimental results have shown that, to feed fabrics without troubles, it is necessary (1) to lower the frictional force between an upper fabric and a presser foot, (2) to enhance the frictional force between a lower fabric and a feed dog, and (3) to make pressure of a presser foot to a minimum as possible.

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