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. 27, 2013
Filed:
Feb. 18, 2011
Asayo Nishimura, Ibaraki-ken, JP;
Asayo Nishimura, Ibaraki-ken, JP;
Riso Kagaku Corporation, Tokyo, JP;
Abstract
A drive pulse Pis turned on and off for an ink chamber to take in ink, exerting pressures thereon, and afterward, a drive pulse Pis turned on and off. This permits, in a course of variation in pressure of ink from a value at a positive pressure peak through a value at a normal pressure to negative pressures, a negative pressure peak C to be amplified for the ink chamber to take in ink with increased power. Further, following the drive pulse Ptuned off, a drive pulse Pis turned on to contract a volume in ink chamberB, producing pressures. Then, the drive pulse Pis turned off to enlarge the volume in ink chamberB, using back actions of produced pressures to have the ink chamberB quickly operate to take in much ink. This causes a subsequent drive pulse Pto be turned on at a hastened timing, and the drive pulse Pthus turned on makes a higher increase in pressure of ink in the ink chamberB, allowing a subsequent droplet of ink to be more quickly propelled out with an adequate pressure.