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. 25, 1990
Filed:
Nov. 22, 1989
Kikukazu Sakurai, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A print head for an ink-jet printing apparatus has a plurality of heater elements arranged in a first direction on one surface of a substrate. A nozzle plate is positioned substantially parallel to and displaced from the surface of the substrate with a predetermined interval therebetween in order to form an ink chamber for retaining recording ink. A slit nozzle extends in the first direction on the nozzle plate and at a position which is opposite the heater elements. Barrier walls are formed on the surface of the substrate and between a plurality of the heater elements, respectively, the barrier walls extending in a second direction which is substantially perpendicular to the first direction. The heater elements generates vapor bubbles in the recording ink to produce energy for ejecting ink droplets from the slit nozzle and in the direction perpendicular to the surface of the substrate.