Radiant energy – Geological testing or irradiation
Patent
1995-12-29
1996-11-05
Hannaher, Constantine
Radiant energy
Geological testing or irradiation
250255, 250DIG2, G01T 100
Patent
active
055720200
ABSTRACT:
A radon test package of simplified and low cost construction. A generally flat outer packet is formed from a single sheet of radon barrier material folded to define two panels with facing inner surfaces sealed along side edge portions, leaving a closeable open edge portion. The outer packet is expandable so as to define a chamber, having an access opening corresponding to the open edge portion. The facing inner surfaces have a surface layer of fusible low density polyethylene, and a sheet of gas-permeable kraft paper is adhered by heat sealing directly to the inner surface of one of the panels in an adhesion pattern which defines a closed triangular pocket containing activated charcoal. When the packet is expanded, the access opening is square, and a block of open cell foam material is inserted to maintain the opening in a standardized configuration, as well as to eliminate the effect of air currents. The two panels are substantially the same size, and there is an adhesive strip on the inner surface of one of the panels immediately adjacent the opening for sealing the access opening closed at the conclusion of a testing period.
REFERENCES:
patent: 4700070 (1987-10-01), Kovac
patent: 4874494 (1989-07-01), Alvarez
patent: 5070247 (1991-12-01), Wiblin
1995 Air Chek, Inc. Radon Test Kit instruction sheet (Mar. 1995).
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