Zig zag sewing machine needle

Details Zig zag sewing machine needle Zig zag sewing machine needle

1984-07-13

1986-04-01

Schroeder, Werner H.

Sewing

Elements

Needles

112184, 112443, D05B 8500, D05B 300

Patent

active

045790728

ABSTRACT:
A sewing machine needle is capable of vertically reciprocating between upper and lower dead points and swinging laterally within a predetermined amplitude between two extreme lateral positions to form zigzag stitches on a fabric material in cooperation with a hook of a rotary loop taker. The needle comprises a relatively thick upper base portion by which the needle is attached to a needle bar of the sewing machine and a shank formed integrally with the upper base portion and adapted to reciprocatingly pass through the fabric material. The shank is composed of a relatively thin shaft, the upper end of which is integrally connected to the upper portion, and a lower portion having a pointed end at the lower end thereof and a needle eye formed near the pointed end, between which there is located a tapered step portion designed to be positioned above the fabric material when the thread loop, formed when the needle is in one of the extreme lateral positions, is caught by the hook and, in turn, positioned below the fabric material when the thread loop formed when the needle is in the other extreme lateral position is caught by the hook.

REFERENCES:
patent: 1949349 (1934-02-01), Brown
patent: 3386399 (1968-06-01), Seck
patent: 3986468 (1976-10-01), Szostak et al.
patent: 4122788 (1978-10-01), Hickson
patent: 4458614 (1984-07-01), Iwashita

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