Propper Manufacturing Co., Ltd.

Peter Hunsinger

Irving A Speelman

Ken Summer

Andrew Zwarun

Frank E Platko

Steam sterilization monitor

A test slide for conducting a test of occult blood in feces is fabricated with a sheet of filter paper or other reagent carrier material impregnated with a test reagent and packaged in an envelope enclosure which overlies both sides of the reagent carrier sheet. One or more specimen apertures are provided in the enclosure on one side of the reagent carrier sheet to permit the placement of feces specimens on the reagent carrier sheet through the apertures. On the other side, the enclosure is openable to form a test opening (which encompasses the feces specimens) so that a developing reagent can be applied to the other side of the reagent carrier sheet at the location of the specimens. A barrier material, impervious to the passage of liquids, is deposited on the reagent carrier sheet in a line which runs across the area of the test opening. This line of barrier material isolates a portion of the reagent carrier sheet from the specimen areas, preventing the migration of liquids from the specimen area to the isolated area. A line of positive test material is desposited on the reagent carrier sheet in the isolated area to function as a positive test of the operability of the test slide. The barrier prevents contamination of the specimens by the positive test material. In the fabrication of a test slide of this type, the line of barrier material and the line of positive test material are preferably deposited in a single pass of the reagent carrier material from roll stock.

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Ridgewood, NY, United States of America

Peter Hunsinger