Cleaning method and apparatus

Cleaning and liquid contact with solids – Apparatus – With heating – cooling or heat exchange means

Reexamination Certificate

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Details

C134S148000, C134S153000, C134S172000, C134S902000

Reexamination Certificate

active

06899110

ABSTRACT:
The present invention can remove particles such as dust by flowing solvent gas such as CO2through a line filter and eject it from a nozzle so as to be converted to solid particles or liquid droplets and eject to a workpiece to be cleaned so as to clean particles or organic materials. It is possible to make the solvent to a solid particle or liquid droplet by adjusting a gap between the nozzle and the workpiece to be cleaned; thus, it is possible to select the most preferable state according to the extent of the adhesion of organic material to the workpiece to be cleaned. Also, it is possible to remove particles such dust in the solvent by a line filter; thus, it is not necessary to use highly pure expensive solvent, and it is possible to reduce the running cost of the apparatus.

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Hoenig, S.A., “Cleaning Surfaces with Dry Ice”,Compressed Air MagazineAug., 1986, pp. 22-25.

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