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:
Apr. 25, 2000
Filed:
Mar. 19, 1997
Applicant:
Inventors:
Tomoaki Nakano, Kawasaki, JP;
Kouji Izumi, Yokohama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 15 ; 347-9 ;
Abstract
An ink-jet printing device includes a recording head driven by a driving voltage waveform in a main scanning direction for recording an image on a recording medium fed into the printing device in a subscanning direction. A voltage level of the driving voltage waveform is controlled such that the voltage value is constant through a single scan of the recording head in the main scanning direction and different between different scans of the recording head in the main scanning direction.