Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent
1988-02-17
1990-10-23
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Calorimeter
422 56, 422 57, 422 61, G01N 3122, G01N 2100
Patent
active
049650475
ABSTRACT:
An analytical test strip has a flexible blister (12) thermoformed in a sheet plastics member (22), and a diaphragm (34) which closes the blister to create a reservoir for holding a reagent and/or carrier liquid (32). The sheet plastics member (22) is further formed with one or two spikes (28) the or each of which is disposed within the blister and extends in a reentrant manner towards the diaphragm where it terminates at a point. For use of the dispenser the blister is pinched by finger pressure applied by the user to cause the spike or spikes to puncture the diaphragm and release the reagent and/or carried liquid which then soaks along an absorbent layer (40) until it reaches a viewing window (20). The test substance, particularly a liquid, is applied to the absorbent layer at a cavity (16), and combines with the reagent and/or carrier liquid as it moves to the viewing window. If required, the absorbent layer may include one or more discrete areas or bands (44) of an absorbed reagent substance through which the reagent and/or carrier liquid and the test substance pass. The medical (or other) condition for which the test is being made is shown as a color or tone change of the absorbent layer as seen through the viewing window.
REFERENCES:
patent: 29725 (1860-08-01), Johnson et al.
patent: 2785057 (1957-03-01), Schwab et al.
patent: 3741727 (1973-06-01), Stroterhoff
patent: 3884641 (1975-05-01), Kraffczyk et al.
patent: 3915647 (1975-10-01), Wright
patent: 4007010 (1977-02-01), Woodbridge, III
patent: 4040515 (1977-08-01), Hessel et al.
patent: 4042336 (1977-08-01), Larsson
patent: 4110079 (1978-08-01), Schaeffer et al.
patent: 4428907 (1984-01-01), Heijenga et al.
patent: 4522923 (1985-06-01), Deutsch et al.
patent: 4857453 (1989-08-01), Ullman et al.
CMB Foodcan p.l.c.
Vassilatos Thalia P.
Warden Robert J.
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