Cleaning and liquid contact with solids – Processes – Miscellaneous
Patent
1992-07-14
1994-08-02
Springer, David B.
Cleaning and liquid contact with solids
Processes
Miscellaneous
134 26, 134 40, B08B 308
Patent
active
053342585
ABSTRACT:
Disclosed is a washing method in which parts and products are washed free of residual smudges without using fleon-family solvents. The method of washing members such as parts or products comprises a first degreasing step for degreasing in nonaqueous liquid the members to be washed after worked, a second degreasing step for degreasing the members being washed in an aqueous liquid which dissolves the nonaqueous liquid, a finish washing step for washing in the aqueous liquid, a rinsing step, and a drying step, wherein the drying step is performed in a plurality of pure water baths, the temperature of a last pure water bath is established to a range of 70.degree. to 85.degree. C., and the washed members are taken out from the pure water bath for drying the surfaces thereof.
Also, the washing method is disclosed in which pure water in a plurality of the pure water baths has temperature gradient in the sequence of washing steps.
Furthermore, the washing method is disclosed in which the speed of taking out the washed members from the last pure water bath is established so as to be in inverse proportion to the surface area of the washed member.
REFERENCES:
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patent: 4907613 (1990-03-01), Litzaw
patent: 4962879 (1990-10-01), Goesele et al.
patent: 5169455 (1992-12-01), Kessler
V. Frank, "Chemical Cleaning Technique for Vibratory Bowl Feeder," IBM Technical Disclosure Bulletin, vol. 25, No. 11B, Apr. 1983, pp. 6267-6268.
Patent Abstracts of Japan, vol. 13, No. 557 (P-974) (Dec. 12, 1989) & JP-A-01 233 413.
Horie Akira
Hosaka Akihito
Imai Yukihiro
Nakajima Ikuo
Nishiguchi Toshiji
Canon Kabushiki Kaisha
Springer David B.
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