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:
Aug. 29, 2000
Filed:
Sep. 11, 1996
Applicant:
Inventors:
Shinichi Kakuda, Yokohama, JP;
Yoshihisa Ohta, Machida, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 45 ;
Abstract
An ink jet printing head includes a nozzle plate having an outside surface and a plurality of nozzles for discharging ink from the outside surface, each nozzle having a first diameter at a peripheral edge of the nozzle plate. A surface treatment layer is provided on the outside surface of the nozzle plate, the surface treatment layer having a plurality of openings overlapping the plurality of nozzles, each opening having a second diameter at a peripheral edge of the surface treatment layer, the second diameter being smaller than the first diameter.