Method and apparatus for preparation and deaeration of...

Details Method and apparatus for preparation and deaeration of... Method and apparatus for preparation and deaeration of...

2005-04-26

2005-04-26

Smith, Duane (Department: 1724)

Gas separation: processes

Sound waves used

Degasification of liquid

C096S175000, C096S196000, C095S260000, C095S266000, C427S565000, C118S610000

Reexamination Certificate

active

06884281

ABSTRACT:
First, the overall quantity of bubbles in a coating liquid is reduced in advance by vacuum deaeration performed in conjunction with preparation of the coating liquid in a stirring tank in a first step, then bubbles of relatively large sizes, of bubbles that have not been removed in the first step are removed by a tank type deaeration device with ultrasonic waves in a floatation tank in a second step, and finally bubbles of very small to small sizes that are difficult to remove in the first and second steps are dissolved in the liquid under pressure with ultrasonic waves and thereby removed in a pipeline in a third step. According to this, bubbles in the coating liquid can reliably be removed irrespective of the nature of the coating liquid, a large amount of coating liquid can be treated, and the possibility that the quality of the deaerated coating liquid is adversely affected is eliminated.

REFERENCES:
patent: 3853500 (1974-12-01), Gassmann et al.
patent: 4205966 (1980-06-01), Horikawa
patent: 6648943 (2003-11-01), Possanza et al.
patent: 06130547 (1994-05-01), None
patent: 11-262601 (1999-09-01), None
patent: 411314012 (1999-11-01), None
patent: 2001219004 (2001-08-01), None

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