John H Treiber

US Patent:

55641598, Oct 15, 1996

Filed:

May 26, 1994

Appl. No.:

8/249880

Inventors:

John H. Treiber - Huntington Beach CA

Assignee:

The John Treiber Company - Nashua NH

International Classification:

B08B 302

US Classification:

15302

Abstract:

The closed-loop multistage printed circuit board cleaning system applies a generous flow of water to rinse printed circuit boards previously cleaned in a wash section, the water then being recirculated through a purification system and reused to clean the printed circuit boards. When the printed circuit boards require application of a saponified liquid for adequate cleaning, the saponified liquid is applied in pre-wash and wash stages, the boards thereafter being air blasted to remove substantially all of the saponified liquid before they are rinsed. In the saponified system, the pre-wash and wash water is recycled within the pre-wash and wash stages themselves, then passed to a drain. In a system that does not require saponification, the wash liquid also may be recycled, thereby permitting both the wash and rinse stage to employ generous flows of water.