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:
Jul. 09, 1985
Filed:
Dec. 05, 1983
Riccardo Brescia, Ivrea, IT;
Ing. C. Olivetti & C., S.p.A., Turin, IT;
Abstract
An ink-jet printer includes a reservoir filled with ink and an ink duct communicating with the reservoir. The duct has a terminal portion with a capillary nozzle for projecting the ink, and an intermediate portion between the reservoir and the terminal portion. Transducer means are associated with the terminal portion of the duct for generating a first pressure wave in the ink, which is directed towards the nozzle and causes a droplet of ink to be discharged through the nozzle. Energy absorption means cooperate with the ink in the intermediate portion of the duct and comprise an elongate container adjacent at least part of the intermediate portion of the duct and having at least one wall which is in contact with the ink and can deform resiliently under the action of a second pressure wave associated with the first pressure wave and directed towards the intermediate portion of the duct. This container has a filling of viscous fluid whereby the energy of the second pressure wave is substantially dissipated within the viscous fluid.