Apparatus and method for protecting chemical bath seals
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United States of America Patent
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Jan 24, 1995
Grant Date -
N/A
app pub date -
Jan 31, 1994
filing date -
Jan 31, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A bath in which articles are processed by immersion in hot liquid chemicals has a chemical receptacle seated in a casing. Wetting of internal components in the casing, such as heating elements and thermal insulation, is prevented by a seal between the receptacle and the rim of the casing. The otherwise exposed seal is isolated from the external environment of the bath by a barrier of flowing water. The water flow shields the sealing material from corrosive chemical drips and fumes and also has a cooling effect which decreases thermal expansion of components in the region of the seal and thereby reduces structural stresses.
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