Making individual capsules by dual deposition

Claim 1

A PROCESS FOR THE COLLECTIVE AND SIMULTANEOUS MANUFACTURE OF CAPSULES, EACH HAVING CORE MATERIAL SURROUNDED BY CAPSULAR WALL MATERIAL, WHICH COMPRISES (A) ESTABLISHING A SYSTEM CONSISTING OF A DISPERSION OF PARTICULATE ENTITIES OF WATER-INSOLUBLE MATTER, EACH OF WHICH IS TO BECOME THE CORE OF A CAPSULE, IN AN AGITATED AQUEOUS DISPERSION MEDIUM IN WHICH THE PARTICULATE ENTITIES ARE SUBSTANTIALLY INSOLUBLE, SAID MEDIUM CONTAINING DISSOLVED THEREIN FILM-FORMING HYDROPHILIC COLLOID MATERIALS, AT LEAST ONE OF WHICH IS GELABLE, CONSISTING OF DIFFERENT KINDS OF MOLECULES WHICH COMBINE TO FORM COACERVATE COMPLEX UNITS UNDER COACERVATING CONDITIONS; (B) CHANGING THE CONDITIONS OF SAID SYSTEM TO INCREASE THE INTERACTION BETWEEN THE MOLECULES OF THE COLLOID MATERIALS TO EFFECT COACERVATION, IN WHICH SAID COLLOID MATERIALS CONTRACT TO FORM COLLOID-RICH COACERVATE COMPLEX UNITS, SOME OF WHICH UNITS DEPOSIT IN A LIQUID STATE, AS A FIRST LIQUID DEPOSIT, AROUND EACH CORE ENTITY TO A THICKNESS AT WHICH SUCH DEPOSITION CEASES, LEAVING REMNANT COACERVATE COMPLEX UNITS OF COLLOID MATERIAL IN SOLUTION, AND LEAVING EACH CORE ENTITY SURROUNDED BY A LIQUID WALL DEPOSIT OF GELABLE COMPLEX COACERVATE FILM-FORMING HYDROPHILIC COLLOID MATERIAL UNITS; (C) CHANGING THE CONDITION OF THE SYSTEM TO CAUSE DECOACERVATION TO TAKE PLACE FOR A TIME SUFFICIENT TO DECOACERVATE ANY REMNANT UNDEPOSITED COMPLEX UNITS OF THE HYDROPHILIC COLLOID MATERIAL, BUT INSUFFICIENT TO CAUSE SUBSTANTIAL DECOACERVATION OF THE DEPOSITED MATERIAL; (D) ADDING TO THE SYSTEM AND DISSOLVING THEREIN ADDITIONAL FILM-FORMING HYDROPHILIC COLLOID MATERIAL TO FORM A REJUVENATED AQUEOUS COLLOID-CONTAINING MEDIUM, WHICH ADDITION FILM-FORMING HYDROPHILIC COLLOID MATERIAL CONSISTS OF MOLECULES WHICH COMBINE WITH THE MOLECULES OF THE COLLOID MATERIALS IN THE SYSTEM TO FORM COLLOID-RICH COACERVATE COMPLEX UNITS; (E) AGAIN CHANGING THE CONDITION OF THE SYSTEM TO CAUSE COACERVATION WHEREIN THE INTERACTION BETWEEN THE MOLECULES OF THE COLLOID-RICH MATERIALS IN THE REJUVENATED AQUEOUS MEDIUM CAUSES THE COLLOID MOLECULES THEREIN TO MAKE NEW COLLOID-RICH COMPLEX COACERVATE UNITS, WHICH NEW UNITS DEPOSIT IN A LIQUID STATE ONTO THE FIRST DEPOSIT OF LIQUID COMPLEX COLLOID UNITS AROUND EACH CORE ENTITY TO FORM A FURTHER LIQUID DEPOSIT OF COLLOID MATERIAL COMPLEX UNITS OVER AND AROUND THE FIRST DEPOSIT, AND COHERENT THERETO; AND (F) FINALLY, AFTER SUCH SECOND DEPOSIT HAS BEEN MADE, COOLING THE SO-FORMED DEPOSITED WALL OF COACERVATE COLLOID MATERIAL AROUND EACH CAPSULE CORE ENTITY TO GEL.