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:
Dec. 11, 1990
Filed:
Oct. 14, 1988
Tokyo Electric Company, Ltd., Tokyo, JP;
Abstract
A release-type dot print head formed by joining together a magnet unit, and an armature unit formed by brazing torsion bars to armatures and supporting parts formed integrally with a second yoke with the armatures in a state in which the free ends of styluses fixed to the free ends of the armatures project from the outer surface of a stylus guide attached to the second yoke by a predetermined length. Portions of the free ends of the styluses projecting from the outer surface of the stylus guide are cut off by a wire-cut electrical discharge cutting process with the styluses in a free state to adjust the length of projection of the free ends of the stylus to a predetermined length. The second yoke and the stylus guide are formed respectively of materials having substantially the same coefficients of thermal expansion. The armature unit is subjected to heat treatment after assembly.