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Thermoplastic welding

  • US 5,313,034 A
  • Filed: 01/15/1992
  • Issued: 05/17/1994
  • Est. Priority Date: 01/15/1992
  • Status: Expired due to Term
First Claim
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1. A method of thermoplastic welding comprising:

  • a. placing in a thermoplastic-containing bond line of bonding surfaces of at least one substrate, a-welding strip comprising;

    1) an electric, current-conducting strip of a first resistance wherein said strip extends along said bond line of said bonding surfaces; and

    2) a plurality of pairs of current-conducting, connector tabs of a second resistance in electrical contact with said strip, said first resistance being higher than said second resistance;

    said connector tabs extending from said strip and said bond line to enable electrical connection to an electrical potential and spaced to allow application of said electrical potential to segments of said current-conducting strip; and

    at least a portion of said connector tabs being spaced apart from each other; and

    b. applying said electrical potential to a pair of said tabs to cause a current to flow through a portion of said strip thereby heating a segment of said strip to cause said thermoplastic to bond said bonding surfaces together.

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