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. 18, 1978
Filed:
Oct. 08, 1976
Applicant:
Inventor:
Takeyoshi Tsutsumino, Itamishi, JA;
Assignee:
Kabushiki Kaisha Taiheiseisakusho, Osakashi, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21F / ;
U.S. Cl.
CPC ...
72138 ; 72144 ;
Abstract
The invention provides a method and an apparatus for automatic production of coiled springs, wherein the spring has close windings at both ends and rough windings with relatively large pitch in the middle portion, by shifting the supplying positions of a material wire in relation to a rotating fixed coil-supporter at varied speed in accordance with a desired winding pitch.