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:
Sep. 10, 1991
Filed:
May. 24, 1989
Applicant:
Inventors:
Assignee:
Hitachi Koki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
400124 ; 4001572 ; 101 9305 ;
Abstract
An actuator for actuating a print hammner includes a yoke made of a magnetic material, an electromagnetic coil mounted on the yoke, and an armature rotatably supported by bearings mounted on opposite sides of the yoke. Upon excitation of the electromagnetic coil, the armature is attracted to the yoke to drive the print hammer through a push rod. The yoke includes a plurality of laminated sheets of a magnetic material formed by stamping using a press. An insulating material and an adhesive are coated on the sheets.