Metal fusion bonding – With means to remove – compact – or shape applied flux or filler – By fluid blast or suction
Patent
1993-10-19
1995-01-10
Heinrich, Samuel M.
Metal fusion bonding
With means to remove, compact, or shape applied flux or filler
By fluid blast or suction
228 37, B23K 304
Patent
active
053799437
ABSTRACT:
A hot air circulation apparatus and method for wave soldering machines which heats air from a high-pressure air source and directs it at the flux applied to a printed circuit board. The heated and pressurized air also circulates air within the wave soldering machine to force the moisture out. A plurality of hot air knives are mounted adjacent heaters within the wave soldering machine and are coupled to the pressurized air source. The hot air knives include a hollow metal cylindrical member which conducts heat from the heater, and contain a plurality of orifices which increase the pressure of the air and direct the air at the flux.
REFERENCES:
patent: 3921888 (1993-01-01), Elliott et al.
patent: 4720034 (1988-01-01), Lee
patent: 5110036 (1992-05-01), Parker, Jr.
patent: 5230460 (1993-07-01), Deamborsio et al.
patent: 5232562 (1993-08-01), Elliott
IBM Technical Disclosure Bulletin, "Solder Wave Air Knife", vol. 28, No. 2, pp. 680,681, Jul. 1985.
List of 76 patents from patent search.
Kester Solder; Kester 970 VOC-Free, No-Clean Soldering Flux; Date Unknown; p. 1.
Heinrich Samuel M.
Martin Paul W.
NCR Corporation
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