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Membrane mounting method and membrane-enclosed amperometric cell

  • US 4,325,797 A
  • Filed: 06/30/1980
  • Issued: 04/20/1982
  • Est. Priority Date: 06/30/1980
  • Status: Expired due to Term
First Claim
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1. In the method of mounting and securing a membrane formed of a flexible polymer film on an amperometric cell having a substantially cylindrical cell end frontally provided with an electrolyte-bearing sensor face by means of a removable annular holding member;

  • the improvement consisting of using as said holding member a substantially non-resilient and creep-resistant die ring having (a) a cylindrical inner surface slidingly fitting onto said cylindrical cell end and (b) at least one tapered inner surface portion outwardly extending from said cylindrical inner surface toward a leading end portion of said die ring;

    moving said leading end portion of said die ring over a predetermined length of said cylindrical cell end for deep-drawingly shaping said polymer film between said die ring and said cylindrical cell end and irreversibly forming a cup-shaped membrane portion extending over said electrolyte-bearing sensor face and an adjacent portion of said cylindrical cell end, said cup-shaped membrane portion being sealingly held by said die ring on said cylindrical cell end during operation of said amperometric cell.

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