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:
Jun. 19, 1990
Filed:
Jul. 27, 1987
Applicant:
Inventors:
Mikio Hayashi, Tokyo, JP;
Yuichi Yamakawa, Tokyo, JP;
Assignee:
Seikosha Co., Ltd., , JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
400124 ; 4001572 ; 101 9305 ; 101 9348 ; 335237 ;
Abstract
A printer head comprising a plurality of driving arms provided corresponding to a like plurality of printing elements and a like plurality of electromagnetic driving devices for driving the corresponding driving arms independently. Each of the electromagnetic driving devices includes a movable yoke fixed to a corresponding driving arm, a core piece facing the yoke and having a coil mounted around the core piece, and a magnet adjacent to the core piece. Each of the magnetic circuits includes an adjusting member for adjusting the magnetic reluctance thereof.