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. 17, 1978
Filed:
Sep. 10, 1976
Hitachi, Ltd., , JP;
Abstract
Ink jet recording apparatus has an ink sensor which detects charges on charged ink droplets emitted from a nozzle of the ink jet recording apparatus and emits electric signals for controlling the above apparatus. The ink sensor comprises a pair of induction plates disposed with a separation distance, and a pair of grounded plates each of which is mounted on each of the induction plates through an electric insulator. The sensor is disposed such that flying paths of the ink particles to be detected are between the pair of induction plates. In the induction plates, current is induced at every time when each of the charged ink droplets pass between the pair of induction plates thereby providing electric signals for controlling.