G - Physics – 01 – N
Patent
G - Physics
01
N
222/1, 342/21, 3
G01N 1/10 (2006.01) B01J 4/02 (2006.01) B01J 19/00 (2006.01) B01L 3/02 (2006.01) G01F 11/08 (2006.01) G01N 1/00 (2006.01) G01N 31/22 (2006.01) G01N 35/10 (2006.01)
Patent
CA 1308467
ABSTRACT OF THE DISCLOSURE A system for printing and dispensing chemical reagents in precisely controlled volumes onto a medium at a precisely controlled location. A jetting tube, comprising an orifice at one end and a fluid receiving aperture at the other end, is concentrically mounted within a cylindrical piezo-electric transducer. The fluid receiving aperture is connected to a reservoir containing a selected reagent by means of a filter. The reservoir is pressurized by a regulated air supply. An electrical signal of short duration is applied to the transducer. The pulse causes the transducer and the volume defined by the jetting tube to expand, there- by drawing in a small quantity of reagent fluid. The cessation of the pulse causes the transducer and the volume of the jetting tube to de-expand, thereby caus- ing at least a substantially uniformly sized droplet of reagent fluid to be propelled through the orifice. The droplet may be directed to impact a printing medium or collected in à dispensing recepticle.
551937
Hayes Donald J.
Houseman Kenneth R.
Verlee Donald J.
Wallace David B.
Abbott Laboratories
Goudreau Gage Dubuc
Hayes Donald J.
Houseman Kenneth R.
Verlee Donald J.
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