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:
Jun. 14, 1983
Filed:
Dec. 17, 1981
Michio Umezawa, Kawasaki, JP;
Ricoh Co., Ltd., Tokyo, JP;
Abstract
In an ink-jet printing head of the type in which the front end of an ink distribution tube is formed with a nozzle hole and the rear end thereof is terminated into a spigot and inserted into one end of the ink supply tube and rigidly connected thereto, a resonance adjusting means has an ink passage of a fine diameter extended therethrough in the axial direction thereof and is inserted into the spigot end portion of the ink distribution tube in such a way that the front end of the resonance adjusting means is spaced apart from the front end with the nozzle hole of the ink distribution tube by a distance equal to a resonance distance, at which the ink in the ink distribution tube is resonated, and thereafter rigidly and liquid-tightly connected to the spigot end portion.