US Government As Represented by the Secretary of the Army

Anne Marie Petrock

Brian Edward Fuchs

Daniel Stec, Iii

Woo Young Lee

James L Zunino, Iii

Andrew C Ihnen

Daniel P Schmidt

A method of forming a very small, i.e. microliter, finely detailed explosive train for the ignition of energetic munitions&#x2014;which train is formed by ink jetting picoliter volume droplets of an explosive ink onto the substrate; which explosive ink is a pure liquid that will not clog the ink jet printer. The explosive ink being a solution composed of a secondary organic explosive solute, a polymeric binder solute, and a polar aprotic organic solvent. Where the ink jet printer is a commercial piezoelectric type, drop-on-demand, ink jet printer capable of precisely delivering the subject picoliter volume droplets. And, which printer is capable of heating said substrate to an elevated temperature to more rapidly evaporate the solvent, leaving the desired, finely detailed, efficacious, crystalline explosive train.

Ink jet printing and patterning of explosive materials

A method of forming a conductive ink bridge wire EED on either a flat or curved substrate, wherein a finely detailed bridge wire EED is printed on the substrate using a nano-particle conductive material applied with a commercially available piezoelectric drop-on-demand ink jet printer&#x2014;which bridge wire is subsequently coated with a first primary explosive layer, an optional second transition explosive layer, and a third secondary explosive layer&#x2014;such that upon creating a current through the bridge wire EED, the bridge wire is heated and the explosive layers detonate in turn, and in turn initiate the detonation of the device to which the detonator is attached.

Flexible detonator integrated with directly written energetics

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Flanders, NJ, United States of America

Anne Marie Petrock