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:
Feb. 08, 1983
Filed:
Apr. 29, 1981
Mikio Osaki, Kashihara, JP;
Sumio Kita, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A charge condition detection system is provided in an ink jet system printer of the charge amplitude controlling type in order to synchronize the application of the charging signal with the droplet formation timing. The charge condition detection system includes a metal member physically connected to the ink liquid to be supplied to an ink droplet issuance unit, and a capacitor electrically connected to the metal member. When the ink droplet is properly charged, the charge amount corresponding to the charge carried by the ink droplet is accumulated on the capacitor. By measuring the voltage appearing across the capacitor, the charge condition of the ink droplet is detected.