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:
Jul. 07, 1998
Filed:
Aug. 15, 1996
Koichi Nakayama, Utsunomiya, JP;
Shinji Kojima, Utsunomiya, JP;
The Singer Company N.V., Curaco, AN;
Abstract
A needle clamping mechanism capable of preventing tip end positions of a pair of needles from being set back or forth and right or left, thereby obtaining excellent sewing performance. The needle clamping mechanism comprises a needle bar comprising a needle bar body, a protrusion protruding downward from a lower surface of the needle bar body and being semicircular in cross section, and having a flat surface portion at a chord thereof, a needle clamp member which the needle bar is engaged in a fixed to, the needle clamp member having a recess for receiving the needle bar body, a needle containing hole being opened at a lower end surface of the needle clamp member, the needle containing hole comprising a semicircular cross sectional portion for receiving the protrusion of the needle bar and a pair of circular arc grooves for receiving needle circular portions provided at upper ends of a pair of needles individually, wherein the needles respectively received in the pair of circular arc grooves are respectively pressed by tip ends o0: set screws which are respectively screwed into the needle clamp member, and each of the needle circular portions is pressed against each of side walls of the needle containing hole, a needle flat surface portion at the upper end of each of the needles is pressed against and fixed to a flat surface portion of the protrusion.