Membrane mounting method and membrane-enclosed amperometric cell
First Claim
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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Accused Products
Abstract
A method of mounting and securing a membrane of polymer film on an amperometric cell that has a cylindrical cell end provided with an electrolyte-bearing sensor face; the holding member is a substantially non-resilient and creep-resistant die ring, having a cylindrical inner surface that fits onto the cylindrical cell end; at least one tapered inner surface portion extends outwardly toward a leading end of the die ring; the leading end is moved over the cell end whereby the polymer film is deep-drawn between the die ring and the cylindrical cell end and is permanently shaped to form a cup-shaped membrane portion sealingly held by the die ring on the cylindrical cell end during operation of the amperometric cell.
An amperometric cell having a cylindrical cell end frontally provided with sensor face, a membrane formed of a flexible polymer film and extending over the sensor face; the membrane is in contact with the cylindrical cell end; a holding member is arranged around the membrane; the holding member is a non-resilient and creep-resistant die ring having a cylindrical inner surface fitting onto the cylindrical cell end and at least one tapered inner surface portion outwardly extending toward a leading end of the die ring; the membrane has a permanently formed cup-shaped portion sealingly held by the die ring on the cylindrical cell end during operation; the die ring can be removed, e.g., for cell maintenance and reused for applying and shaping a fresh membrane.
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Citations
31 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- 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;
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17. In a membrane-enclosed amperometric cell having a substantially cylindrical cell end frontally provided with an electrolyte-bearing sensor face, a membrane formed of a flexible polymer film extending over said sensor face and having a circumferential portion in contact with said cylindrical cell end;
- and a removable annular holding member around said circumferential portion of said membrane for sealingly pressing said circumferential portion of said membrane onto said cell end;
the improvement wherein said annular holding member is 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; and
wherein said membrane has a permanently formed cup-shaped 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. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- and a removable annular holding member around said circumferential portion of said membrane for sealingly pressing said circumferential portion of said membrane onto said cell end;
Specification