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:
Sep. 14, 1976
Filed:
Sep. 26, 1974
Nippon Telegraph and Telephone Public Corporation, Tokyo, JA;
Sharp Kabushiki Kaisha, Osaka, JA;
Abstract
An ink jet system printer of the charge amplitude controlling type wherein a predetermined phase relationship is established between separation of ink drops from a nozzle to a record receiving member and application of charging signals to a charging electrode, through detection of the amplitude of charge carried on ink drops contributable to phase determination. Charging signals of one polarity containing intelligence signals are supplied to the charging electrode to charge ink drops contributable to printing, whereas phase detecting signals of the opposite polarity to that of the charging signals are supplied to the charging electrode for the purpose of charging ink drops contributable to phase determination. Both of the charging signals and the phase detecting signals are mixed in a mixer circuit arrangement of a simple construction which consists of a pair of switches, before both signals are supplied to the charging electrode.