Patent ID: 6949221

Claim:
A method of making a test strip for determining the concentration of an analyte in a body fluid, which comprises: assembling as a sealable package: a cover sheet having an elongated window cut in it; a lamellar membrane which extends across the window, has a sealable coating and contains a reagent that reacts with the analyte to produce a color change; an adhesive-coated porous sheet, and a backing sheet which contacts the adhesive and has through it a sample port; positioning the sealable package between a substantially flat plate and a shaping die that defines an elongated groove having a length about equal to the length of the window, such that the groove and the window are in alignment; and applying the die to the sealable package with sufficient pressure to compress portions of the porous layer that are located on opposite sides of the groove and to bond the cover sheet to the membrane and the porous sheet to the backing sheet.