Automatic precision cleaning apparatus with continuous on-line m

Details Automatic precision cleaning apparatus with continuous on-line m Automatic precision cleaning apparatus with continuous on-line m

1994-10-04

1997-07-15

Stinson, Frankie L.

Cleaning and liquid contact with solids

Apparatus

With alarm, signal, indicating, testing, inspecting,...

134202, 134111, B08B 1300

Patent

active

056473869

ABSTRACT:
A cleaning system and method adapted for removal of small particles from solid substrates is disclosed. In one implementation, the system employs two on-line particle counters to measure particle concentrations in an incoming stream of filtered cleaning liquid, providing a baseline measurement, and in the outgoing or recirculation stream that has already made contact with the article to be cleaned. Comparison of the two measurements over time provides an accurate indication of the degree of particle removal, which is reported to the user and/or employed to control the cleaning cycle. In another implementation, the system employs a single detector that measures the magnitude of a signal (e.g., radioactivity) emitted by the particles; this signal continuously indicates the number of particles remaining on the substrate.

REFERENCES:
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patent: 4893320 (1990-01-01), Yanagi et al.
patent: 5201958 (1993-04-01), Breunsbach
patent: 5339844 (1994-08-01), Stanford, Jr. et al.
patent: 5396178 (1995-03-01), Rybarski

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