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Method of magnetically and/or electrostatically positioning pressure-sensitive adhesive beads and magnetically positionable pressure-sensitive adhesive beads

  • US 6,127,002 A
  • Filed: 01/29/1997
  • Issued: 10/03/2000
  • Est. Priority Date: 03/09/1993
  • Status: Expired due to Fees
First Claim
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1. A method for providing, a pressure-sensitive adhesive bead coated substrate comprising the step of:

  • (a) providing a first substrate and a pressure-sensitive adhesive free-flowing bead(s) wherein each of the beads(s) consists essentially of a pressure-sensitive adhesive core wherein the pressure-sensitive adhesive core consists essentially of pressure-sensitive adhesive and a tack-free shell therearound, wherein the pressure-sensitive adhesive bead(s) is electrostatically chargeable, magnetically responsive, or both;

    (b) positioning the bead(s) on the first substrate by a means selected from the group consisting of electrostatic force(s), magnetic force(s), both electrostatic force(s) and magnetic forces to form a tack-free coating of the bead(s) on the first substrate;

    wherein upon activation by heat and/or pressure the beads forms a layer of pressure-sensitive adhesive that displays pressure-sensitive lack on the substrate.

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