发明名称 Differential feeding apparatus for a sewing machine
摘要 A feeding apparatus includes a spindle and a shaft disposed in a base of a sewing machine. A lever is fixed on the shaft and can be caused to swing by the spindle. Two followers are engaged on the spindle. A pawl is fixed on each follower for feeding cloth. One follower is coupled to one end of the lever and the other follower is coupled to the other end of the lever by a link and a lever arm. The amplitude of swinging of the lever arm can be changed so that one of the pawls can be caused to move back and forth relative to the other pawl.
申请公布号 US5103751(A) 申请公布日期 1992.04.14
申请号 US19910743714 申请日期 1991.08.12
申请人 WANG, SHUI-NU 发明人 WANG, SHUI-NU
分类号 D05B27/08 主分类号 D05B27/08
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