Loop catching device for lock stitching sewing machines
AssigneeJanome Sewing Machine Co., Ltd.
InventorsKazumasa Hara, Mikio Koike
Life of this patent
Estimating the term…
Abstract
A loop catching device for a sewing machine includes a rotatable loop taker carrying a lower thread, a pulse motor operated in a timed relationship with a reciprocating movement of a needle, and a looper arranged adjacently to the loop taker and driven by the motor. The loop taker and the looper are synchronized with the movement of the needle to catch the loop produced by the needle and hold the loop for a predetermined time.
Claims3
A loop catching device for a sewing machine having a machine frame, a main shaft rotatably mounted on the machine housing, a needle swingable laterally of the feeding direction and operatively connected to the main shaft and vertically reciprocated by rotation of the main shaft to penetrate a fabric to be sewn, said needle carrying an upper thread to provide a loop formed while the needle point is located below the fabric, comprising a loop taker carrying a lower thread and rotated in a timed relation with the vertical reciprocating movement of the needle to catch the loop provided by the needle, needle control means for swinging the needle laterally of the feeding direction;
- an electromagnetic pulse motor operated in a timed relation with the movement of the needle in accordance to a selected pattern;
- and looper means provided adjacently to the loop taker and reciprocatingly operated by the pulse motor in a time relation with the movement of the needle to catch the loop and hold the same for a predetermined time.
Dependencies are inferred from the claim text.