发明名称 Lockstitch sewing by needle looper
摘要 A lockstitch sewing machine utilizing a needle looper to extend upwardly through a work material to grasp an upper thread and pull it downwardly through the work material to a looptaker which casts the upper thread about a lower thread in order to form a lockstitch. When the needle looper is in an upper position to catch an upper thread, a hook needle is exposed and thread is deflected into the hook thereof. As the needle looper is retracted to a depressed position the hook needle is moved to a guard position so as to retain the upper thread therein during transit. When the needle looper is at its lower position, the hook is again exposed to release its thread to a looptaker for concatenation with a lower thread.
申请公布号 US4281609(A) 申请公布日期 1981.08.04
申请号 US19800145907 申请日期 1980.05.02
申请人 THE SINGER COMPANY 发明人 ZOCHER, JOSEF
分类号 D05B81/00;D05B85/10;(IPC1-7):D05B57/08 主分类号 D05B81/00
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