×

Method and apparatus for fabricating bichromal balls for a twisting ball display

  • US 5,262,098 A
  • Filed: 04/12/1993
  • Issued: 11/16/1993
  • Est. Priority Date: 12/23/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for fabricating bichromal balls, comprisinga separator member having a first surface, a second surface located opposite said first surface and an edge region in contact with both said first and second surfaces,means for flowing first and second, differently colored, hardenable, liquid materials over said first and second surfaces, respectively, toward said edge region so that said first and second liquid materials arrive at said edge at substantially the same flow rate and form a reservoir of said liquid materials outboard of said edge region, said reservoir being comprised of side-by-side regions of said first and second liquid materials,means for propelling said first and second liquid materials out of said reservoir into a fluid medium as a plurality of bichromal streams having side-by-side portions of different colors, the forward end of each stream being unstable and breaking up into droplets which form into spherical balls, each of said balls comprising hemispheres of differently colored hardenable liquid, andmeans for collecting said bichromal balls.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×