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. 21, 1986
Filed:
Aug. 21, 1985
Applicant:
Inventors:
Takahiro Yamada, Ibaraki, JP;
Satoshi Namekawa, Ebina, JP;
Eiji Yoshino, Hitachi, JP;
Yasumasa Matsuda, Hitachi, JP;
Assignees:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 75 ;
Abstract
In an ink jet recording apparatus, an amplification-degree control circuit is associated with an amplifier circuit amplifying a detection signal indicative of the quantity of charge of charged ink droplets, so as to decrease the degree of signal amplification by the amplifier circuit when a charging signal is applied to a charging electrode charging the ink droplets, but to increase the degree of signal amplification by the amplifier circuit when the quantity of charge of the charged ink droplets is detected from the detection signal.