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:
Mar. 02, 1999
Filed:
Jun. 12, 1996
Hans Reinten, BD Velden, NL;
Oce-Nederland B.V., Ma Venlo, NL;
Abstract
Ink-jet system includes an ink channel between an ink reservoir and a nozzle. A pressurizing device is arranged adjacent to the ink channel for generating in the ink liquid an acoustic pressure wave propagating in the ink channel, so that an ink droplet is expelled from the nozzle. The ink channel has a substantially rectangular cross section and a depth d which is larger than the height of the nozzle, such that energy losses due to reflection of the acoustic wave at the transition from the ink channel to the nozzle are minimized. The pressurizing device includes a first electromechanical transducer with a plate-like expansible member having a height H in the direction of the depth of the ink channel such that the ratio H/d is smaller than the ratio between the respective elastic modules of the expansible member and the ink liquid. At least one second electromechanical transducer is arranged at said ink channel and is energized to create a pressure bias in the ink volume before the same is pressurized by the first transducer.