초록 ▼

An impulse ink jet print head of the type including a plurality of operating plates held together in a contiguous superposed relationship. A plurality of piezoceramic transducers are mounted on a diaphragm such that each transducer overlies one of a similar plurality of ink chambers. The transducers

An impulse ink jet print head of the type including a plurality of operating plates held together in a contiguous superposed relationship. A plurality of piezoceramic transducers are mounted on a diaphragm such that each transducer overlies one of a similar plurality of ink chambers. The transducers are electrically energized and thereby caused to displace ink in the chambers resulting in the ejection of ink droplets through a plurality of nozzles, one nozzle being in fluidic communication with each of said chambers. An IC driver may be interfaced between an external control computer and the transducers to simplify the external circuitry necessary for operation of the print head. Ink is delivered to the chambers through compliant manifolds mounted externally of the print head, then through restrictor orifices formed in the same plate in which the nozzles are located. The construction allows for venting of the manifolds. The manifolds are constructed of material having sufficient compliance to absorb pressure waves which occur therein so as to avoid the undesirable phenomenon known as “cross talk”whereby pressure impulses intended for one system comprising an interconnected restrictor orifice, compression chamber, and nozzle are communicated to another such system in the print head.

대표청구항 ▼

An impulse ink jet print head of the type including a plurality of operating plates, all lying in parallel planes, held together in a contiguous superposed relationship comprising: a first plate including a plurality of nozzles therein for ejecting droplets of ink therethrough; a second plate defini

An impulse ink jet print head of the type including a plurality of operating plates, all lying in parallel planes, held together in a contiguous superposed relationship comprising: a first plate including a plurality of nozzles therein for ejecting droplets of ink therethrough; a second plate defining a plurality of ink chambers therein; an ink supply including compliant manifold means external of said plurality of operating plates; first passage means connecting each of said chambers to said ink supply; each of said chambers overlying an associated one of said nozzles and having an outlet for directing ink thereto; and a third plate contiguous with said second plate and including driver means for displacing ink in said chambers thereby causing the ejection of ink droplets from each of said nozzles.