The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 1986
Filed:
Jul. 13, 1984
Mikio Koike, Tokyo, JP;
Akiyoshi Sasano, Tokyo, JP;
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.