Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent
1992-01-15
1993-04-06
Johnston, Jill A.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Calorimeter
422 58, 422 61, 422 87, 436 1, G01N 3122
Patent
active
052001474
ABSTRACT:
A prevacuum steam sterilization test pack, for testing the efficiency of the vacuum system of a steam sterilizer apparatus to create a vacuum, comprises a bundle of layers and a porous overwrap folded about the bundle to maintain the integrity thereof. The bundle includes a porous test sheet with a steam sensitive indicator ink printed thereon positioned between layers of the bundle to indicate the efficiency of the vacuum system of a sterilizer, a plurality of selectively porous layers within the bundle above and below said test sheet, and at least one pair of non-porous gas-impermeable layers disposed intermediate the test sheet and one of the bundle end surfaces. The pair of non-porous layers is spaced from both the test sheet and the one bundle end surface by at least one of the porous layers, and the non-porous layers are spaced apart by at least one and no more than two of the porous layers. The number, the position and spacing apart of the non-porous layers depend upon a predesignated degree of efficiency.
REFERENCES:
patent: 4486387 (1984-12-01), Augurt
patent: 4576795 (1986-03-01), Bruso
patent: 4579715 (1986-04-01), Bruso
patent: 4596696 (1986-06-01), Scoville, Jr.
patent: 4692307 (1987-09-01), Bruso
Johnston Jill A.
Propper Manufacturing Co. Inc.
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