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:
Jan. 01, 1985
Filed:
Jun. 30, 1983
Applicant:
Inventor:
Koichiro Jinnai, Kawasaki, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 75 ; 3461 / ;
Abstract
An ink jet printing apparatus is disclosed in which ink drops are ejected sequentially from a head to print out dots on a recording medium. A predetermined number of guard drops are interpolated between adjacent printing drops. Guard drops selected out of the interpolated ones are charged to a same polarity as the printing drops and to a predetermined level, which is far lower than that for the printing drops. The charging is effected particularly on guard drops which lie in a high deflection step range.