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:
Jul. 13, 2004
Filed:
Aug. 23, 2002
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., LTD, Minami-Ashigara, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/938 ;
U.S. Cl.
CPC ...
B41J 2/938 ;
Abstract
An ink-jet printing apparatus comprises a plurality of nozzles that eject ink, the nozzles being grouped into two or more nozzle groups; pressure chambers, each being provided to one of the nozzles; ink-ejection energy generators, each being provided for one of the pressure chambers; and a vibration controller configured to supply a non-ejecting vibration signal to the ink-ejection energy generators of each nozzle group at a different timing. The non-ejecting vibration signal causes the corresponding ink-ejection energy generator to produce energy so as not to cause the ink to eject from the nozzle, but cause the liquid surface of the ink to slightly vibrate in the associated nozzle.