The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 1983
Filed:
Nov. 09, 1981
John M Hale, Meinier, CH;
Eugen Weber, Hinwil, CH;
Orbisphere Corporation Wilmington, Collonge-Bellerive, CH;
Abstract
A device for mounting and securing a membrane made of a substantially flat piece of flexible polymer film on an amperometric cell that has a substantially cylindrical cell end frontally provided with an electrolyte-bearing sensor face by means of a removable annular holding member; according to the invention the holding member is a substantially non-resilient and creep-resistant die ring, preferably made of stainless steel, having a cylindrical inner surface that fits slidingly onto the cylindrical cell end and at least one tapered inner surface portion that extends outwardly from the cylindrical inner surface toward a leading end of the die ring; the leading end of the die ring is moved over the cylindrical 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 extending over the electrolyte-bearing sensor face and the adjacent portion of the cylindrical cell end; the resulting cup-shaped membrane portion is sealingly held by the die ring on the cylindrical cell end during operation of the amperometric cell. A membrane-enclosed amperometric cell having a cylindrical cell end frontally provided with an electrolyte-bearing sensor face, a semi-permeable membrane formed of a flexible polymer film and extending over the sensor face; a circumferential portion of the membrane is in contact with the cylindrical cell end; a removable annular holding member is arranged around the circumferential portion of the membrane and presses the circumferential portion of the membrane sealingly onto the cell end; according to the invention, the annular holding member is a non-resilient and creep-resistant die ring, preferably made of stainless steel, having a cylindrical inner surface slidingly fitting onto the cylindrical cell end and at least one tapered inner surface portion outwardly extending from the cylindrical inner surface toward a leading end portion of the die ring; the membrane has a permanently formed cup-shaped portion extending over the electrolyte-bearing sensor face and an adjacent portion of the cylindrical cell end; the cup-shaped membrane portion is sealingly held by the die ring on the cylindrical cell end during operation of the cell; the die ring can be removed; e.g. for cell maintenance and re-used for applying and shaping a fresh membrane.