Abstract: A method of strengthening printed components created by a three-dimensional printing technique utilizes cynoacrylate adhesives. The component is first printed in successive layers of calcium sulfate or similar materials on a three-dimensional printer. The component is next submerged in liquid adhesive contained in a vacuum chamber. A vacuum is applied for a time period to degas the voids and interstices in the material of the component. The vacuum chamber may then be pressurized to transfer liquid adhesive into the evacuated voids. The component is removed from the vacuum chamber and the adhesive allowed to polymerize.

Abstract: A tube having a needle piercing membrane closing the threaded opening of a tube neck is provided with a screw-on nozzle defining cap having an internal stopper projecting into the mouth opening to the throat, the stopper sealingly engaging the perforated mouth opening and terminating adjacent the membrane.