Chemistry: physical processes – Physical processes – Crystallization
Patent
1977-09-20
1979-01-16
Serwin, R.E.
Chemistry: physical processes
Physical processes
Crystallization
734254P, 734256, 422100, G01N 3316, G01N 114
Patent
active
041347307
ABSTRACT:
In order to achieve a specimen in the form of a dry spot on a given surface, use is made of an elongated capillary tube one end region of which communicates fluid-tightly with the interior of a flexible resilient enclosure in the form of a suitable bulb which after being compressed will by itself expand to its initial volume, this bulb in turn communicating fluid-tightly with the interior of a container which is provided in its interior with an air-flow retarding material capable of regulating the flow of air resulting from compression and subsequent expansion of the flexible resilient enclosure in such a way that when the end of the capillary tube distant from the enclosure is placed in a solution of the specimen and the enclosure after being compressed is permitted to expand, the solution will be drawn into the capillary tube and will be held therein while the lower end of the capillary tube is placed near a surface onto which, as a result of the condition of the air in the interior of the resilient enclosure, the solution will flow in its entirety out of the capillary tube so that after drying the solution thus deposited on the surface will form the desired spot thereon.
REFERENCES:
patent: 3285296 (1966-11-01), Ishimaru et al.
patent: 3640388 (1972-02-01), Ferrari
patent: 3667917 (1972-06-01), Brandt
patent: 3748909 (1973-07-01), Kuo
patent: 3758275 (1973-09-01), Quame
patent: 3843323 (1974-10-01), Quame
patent: 3995496 (1976-12-01), Bickford
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