Liquid specimen transfer apparatus and method

Fluent material handling – with receiver or receiver coacting mea – Processes – Battery grid pasting

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141 26, 141 98, 141114, 141130, 422 63, 436180, 7386384, B65B 104, B65B 304

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054110653

ABSTRACT:
A method of obtaining aliquots or samples from a liquid specimen collection container and an apparatus which automateally perforths those methods involves transferring a sample of liquid from a sealed non-deformingly expandable container containing gas and the liquid without contaminating the liquid remaining inside the container, and comprises (a) non-deformingly volumetrically expanding the sealed container sufficiently to reduce pressure therein below ambient pressure outside the container, (b) applying heat selectively to a locus on said enlarged container to non-invasively create a hole having a diameter effective to equilibrate the pressure inside the container with said ambient pressure without loss of liquid from the container, and (c) non-deformingly volumetrically reducing the container to expel liquid from the container through the hole.

REFERENCES:
patent: 4609017 (1986-09-01), Coulter et al.
patent: 5069364 (1991-12-01), McGill
patent: 5174961 (1992-12-01), Smith
patent: 5238031 (1993-08-01), Baeumer et al.
patent: 5265655 (1993-11-01), Hirsch

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