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:
Mar. 13, 1984
Filed:
Jan. 18, 1982
Applicant:
Inventor:
Kunio Ikeda, Kawasaki, JP;
Assignee:
Ricoh Company, Ltd., , JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; B21D / ;
U.S. Cl.
CPC ...
3461 / ; 2915 / ; 239601 ;
Abstract
An ink-jet nozzle for use in an ink-jet printer with stable ink discharging characteristics and excellent machining capability and a method for manufacturing same are provided. The present ink-jet nozzle is generally in the shape of a disc provided with a through-hole in the center which serves as an ink passage. The disc has a double annular structure in which the inner annular portion has the Vickers hardness value in the range between 500 and 600, whereas the outer annular portion has a value approximately a half thereof.