Patent ID: 8297959

Claim:
An electrohydrodynamic system for producing a capsule having at least one encapsulated agent, said system comprising: a hollow tube having an external wall and an interior configured to receive a core fluid; a shell liquid source surrounding only a fraction of a length of the external wall of said hollow tube such that at least a discharge end of the hollow tube is not surrounded by the shell liquid source; a core fluid supply tube arranged to supply the core fluid to said interior of said hollow tube; a shell liquid supply tube arranged to supply a shell liquid to said shell liquid source; a collector electrode positioned above the shell liquid source configured to collect the produced capsule; an extractor body positioned between the shell liquid source and the collector electrode; and an electric potential source to subject the core fluid and the shell liquid to an electric potential to cause the core fluid and shell liquid to form a jet including an at least two-fluid electrically charged fluid by incorporation of the extractor body.