System for distributing solution in strip-shape

Abstract

A system for laying down stripes of solution on substrate is described. The substrate preferably comprises a web of material set on a backing roller passed by a specially configured die. The die includes at least a mouth with lips extending beyond a face or body of the die. The die is adapted to avoid fluid leakage therefrom. Upper and lower portions of the die defining the mouth are preferably substantially flat and mirror images of each other. The lips are preferably placed in close proximity to the material on which the solution is to be deposited. Solution passing through the mouth of the die is directed to the webbing and deposited in a substantially constant thickness stripe or band. Often, the solution comprises a reagent-type solution. The solution coating is typically dried onto the substrate. Dried product may then be used in reagent test strop production.

Description

technical field [0001] The present invention relates to a method for depositing a chemical composition in solution on a substrate. The invention is particularly suitable for depositing a solution to be dried on a substrate which is then used to manufacture reagent test strips. Background of the invention [0002] Analyte detection assays show that the results of these tests play an important role in diagnostic analysis in applications that include use in various clinical laboratory tests, home tests, etc. These more common analytes include glucose, alcohol, formaldehyde, L-glutamic acid, glycerol, galactose, polysaccharide proteins, creatinine, ketones, vitamin C, lactic acid, leucine, malic acid, pyruvic acid, Uric acid and steroids. The aforementioned analytical assays are typically performed with physiological fluids such as tears, saliva, blood, blood. As the importance of analytical tests has increased, various analytical test methods and d...

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