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US 4,837,043 AGranted
Process for the production of test strips by casting method
AssigneeMiles Inc.
InventorsHelmut Engelmann, Karlheinz Hildenbrand, Gunter Junkers
Life of this patent
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Abstract
Process for the production of a test devices using extruder casting machines or cascade casting machines is disclosed in which reagent zones are produced on a common surface with remaining portion of test device such that reagent zone is protected by being in the same plane as a portion of the test device. The process permits application of reagent material to matrix areas without interaction of the reagents or the loss of reagents due to extraction during the process of forming the test device.
Claims9
A process for the preparation of a diagnostic test strip, which process comprises
- (a) adhering a matrix to a substrate,
- (b) impregnating the matrix with an impregnating liquid having a viscosity of 0.9 to 4 mPas using an extruder casting machine or a cascade casting machine for the impregnation, and
- (c) slitting the resulting reagent impregnated matrix into individual diagnostic test strips.
Dependencies are inferred from the claim text.