Method for cleaning material contaminated with greasy or oily substances
AssigneeLeybold Aktiengesellschaft
InventorsFranz Hugo, Johannes Mosch, Erwin Wanetzky
Life of this patent
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Abstract
The parts are heated by conduction and radiation while the chamber is evacuated, whereupon the chamber is sealed air-tight and the parts are also heated by condensation of vapors from the grease and oil. When the parts reach a constant temperature the chamber is again evacuated, causing the temperature of the parts to drop as condensate thereon evaporates. Finally, the chamber is returned to atmospheric pressure and the cleaned parts are removed.
Claims10
A method for cleaning parts contaminated with at least one of grease and oil, the method comprising
- placing parts contaminated with at least one of grease and oil in a vacuum chamber;
- effecting a first evacuation of the chamber to a pressure or less than 10 hPa;
- sealing the chamber air-tight while the pressure is less than 10 hPa;
- heating the parts in the chamber while said chamber is sealed air tight, thereby forming vapors of said at least one of grease and oil, and
- effecting a second evacuation of the chamber to remove vapors of said at least one of grease and oil.
The method of 1 wherein said sealing takes place while said parts are being heated.
Dependencies are inferred from the claim text.