Device of guiding drawing-out of a lower thread from a horizonta

Details Device of guiding drawing-out of a lower thread from a horizonta Device of guiding drawing-out of a lower thread from a horizonta

1985-10-03

1987-09-15

Reynolds, Wm. Carter

Sewing

Special machines

Darning

11212113, 112184, 112243, 112458, 112467, D05B 302, D05B 1900, D05B 5726

Patent

active

046931937

ABSTRACT:
A lower thread drawing-out device for a computerized sewing machine, the device having a cup-shaped loop taker with a surrounding wall. The loop taker is rotatable in a timed relation with a vertical reciprocation of the needle to catch the upper thread to concatenate with the lower thread and thereby form lock stitches. A bobbin is arranged in the loop taker so as to form a space between the bobbin and the loop taker surrounding wall. A lower thread drawing out element having a free end in the space is arranged so that when a lower thread is wrapped around the bobbin and extends to a needle, the free end contacts the lower thread at a location. The lower thread drawing out element is rotatable relative to the loop taker. The lower thread is movable transversely at the contact location relative to the lower thread when extended and in response to a rotation of the element relative to the loop taker, thereby compensating for biasing of the lower thread.

REFERENCES:
patent: 1983263 (1934-12-01), Allen et al.
patent: 2438833 (1948-03-01), Wood
patent: 4091753 (1978-05-01), Johnson et al.
patent: 4215639 (1980-08-01), Johnson
patent: 4355590 (1982-10-01), Ketterer

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