CA2257756A1 - Method and apparatus for controlling formation of two-colour balls for a twisting ball display - Google Patents

Method and apparatus for controlling formation of two-colour balls for a twisting ball display Download PDF

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Publication number
CA2257756A1
CA2257756A1 CA002257756A CA2257756A CA2257756A1 CA 2257756 A1 CA2257756 A1 CA 2257756A1 CA 002257756 A CA002257756 A CA 002257756A CA 2257756 A CA2257756 A CA 2257756A CA 2257756 A1 CA2257756 A1 CA 2257756A1
Authority
CA
Canada
Prior art keywords
liquids
balls
droplets
different colors
hardenable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002257756A
Other languages
French (fr)
Other versions
CA2257756C (en
Inventor
Edward A. Richley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of CA2257756A1 publication Critical patent/CA2257756A1/en
Application granted granted Critical
Publication of CA2257756C publication Critical patent/CA2257756C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G02B26/026—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light based on the rotation of particles under the influence of an external field, e.g. gyricons, twisting ball displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

An apparatus for fabricating bichromal balls includes a means for fabricating droplets from electrically conductive hardenable liquids. The liquids have different colors. A forward end of the hardenable liquids becomes unstable and breaks up into the droplets. Each droplet includes hemispheres of different colors. An RF signal generator produces electrical pulses which increase the instability of the forward end of the hardenable liquids.
A capacitance in the conductive liquids causes current to flow from the signal generator to the hardenable liquids.
A diameter of the droplets is reduced to form substantially spherical balls. Each of the balls includes hemispheres of different colors. The bichromal balls are collected.
CA002257756A 1998-01-09 1999-01-04 Method and apparatus for controlling formation of two-colour balls for a twisting ball display Expired - Fee Related CA2257756C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/004,959 1998-01-09
US09/004,959 US5976428A (en) 1998-01-09 1998-01-09 Method and apparatus for controlling formation of two-color balls for a twisting ball display

Publications (2)

Publication Number Publication Date
CA2257756A1 true CA2257756A1 (en) 1999-07-09
CA2257756C CA2257756C (en) 2002-04-30

Family

ID=21713404

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002257756A Expired - Fee Related CA2257756C (en) 1998-01-09 1999-01-04 Method and apparatus for controlling formation of two-colour balls for a twisting ball display

Country Status (5)

Country Link
US (1) US5976428A (en)
EP (1) EP0928681B1 (en)
JP (1) JP4175712B2 (en)
CA (1) CA2257756C (en)
DE (1) DE69904374T2 (en)

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Also Published As

Publication number Publication date
US5976428A (en) 1999-11-02
EP0928681A1 (en) 1999-07-14
EP0928681B1 (en) 2002-12-11
JPH11314258A (en) 1999-11-16
DE69904374D1 (en) 2003-01-23
JP4175712B2 (en) 2008-11-05
DE69904374T2 (en) 2003-05-15
CA2257756C (en) 2002-04-30

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