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:
Oct. 01, 2002
Filed:
May. 22, 2000
Masahiko Fujii, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The present invention provides an ink jet recording head in which an ink droplet having a small volume that can realize a desired image quality can be ejected onto a recording sheet without making a space between dots in normal printing, and further, in which an ink droplet having a large volume that can afford a sufficient density can be ejected even when thinning-out printing is performed in high-speed printing. An ink jet recording head having two ink supplying openings that introduce ink from an ink tank, an ink chamber that temporarily contains ink introduced from the ink supplying openings and a set of two kinds of first and second ink flowing paths mounted alternately on a flowing path substrate. The first ink flowing path ejects an ink droplet of 7 pl and its ejecting amount is constant. The second ink flowing path selectively ejects one of ink droplets of two volumes, i.e., ink droplets of 7 pl and ink droplets of 30 pl. Specifically, the volume of ink droplets ejected from the second ink flowing path is variable. In the normal printing mode, ink droplets of 7 pl are ejected from the first and second ink flowing paths, while ink droplets of 30 pl are ejected from only the second ink flowing path in the high-speed printing mode.