Patent ID: 6524500
Filing Date: 2003-02-25
Classification: B01J,G02B

Abstract:
A method for making a microencapsulated gyricon bead comprising:converging first, second, third and fourth materials in a liquid state; forming a bead from the coalescing of the first and second materials, which have substantially the same surface tension, the formed bead having two hemispherical surfaces with one surface differing from the other in optical and electrical characteristics; surrounding the bead with the third material by the coalescing of the third material around the bead, the third material having a surface tension less than the first material and the second material and having a melting temperature greater than the first material and the second material; encapsulating the third material with the fourth material by coalescing of the fourth material around the third material, the fourth material having a surface tension less than the surface tension of the third material; and, solidifying the fourth material.