Method and package for packaging contents at reduced pressures

Details Method and package for packaging contents at reduced pressures Method and package for packaging contents at reduced pressures

1998-04-07

1999-12-14

Hail, III, Joseph J.

Package making

Methods

With contents treating

53400, B65B 3100

Patent

active

060001984

ABSTRACT:
A package and method for the packaging of contents at a reduced pressure which provides for improved protection of said materials from contamination. The method includes hermetically sealing a gas and vapor impermeable packaging containing both the material, object, and/or device and an adsorbent at elevated temperature. Subsequent cooling of the adsorbent results in the production of a partial vacuum within the packaging. Alternatively, if the packaging is evacuated prior to sealing by use of some mechanical device, the subsequent cooling of the adsorbent results in a further reduction of the interior pressure of the packaging. The improvement is provided by the presence of the cooled adsorbent in the packaging. Due to the presence of the cooled adsorbent within the packaging, the vacuum within the packaging is produced or increased and more readily maintained due to the adsorptive action of the adsorbent. Also, the vapor pressure of any gas or vapor contaminates remaining in the packaging or generated or otherwise released by the materials within or containing this partial vacuum are further reduced by the action of the adsorbent. This rate of this reduction is increased as a result of the partial vacuum within the packaging.

REFERENCES:
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patent: 4668551 (1987-05-01), Kawasaki et al.
patent: 4981007 (1991-01-01), Shima et al.
patent: 5009308 (1991-04-01), Cullen et al.
patent: 5328671 (1994-07-01), Rockenfeller
patent: 5505892 (1996-04-01), Domme
patent: 5685986 (1997-11-01), Yamada et al.
patent: 5779643 (1998-09-01), Kashiba

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