Apparatus used in surface treatment and a method of surface treatment using said apparatus

Abstract

An apparatus used in surface treatment and a method of surface treatment using said apparatus are provided in the present invention. Said apparatus comprises a dipping tank forming one or more hoppers in its bottom, a drain path connected to said hoppers, a solid-liquid separator settled in said drain path, a recirculating path for supernatant from said separator, and a spraying tool connected to said recirculating path and arranged in the rear part of the dipping tank; and said method of surface treatment using said apparatus comprises dipping an article-to-be-treated in a treating liquid in a dipping tank forming one or more hoppers in its bottom, purging sludge formed and settling during said dipping through a drain path connected to said hoppers, separating said sludge by a solid-liquid separator settled in said drain path, recirculating supernatant through a recirculating path from said separator to a spraying tool connected to said recirculating path and arranged in the rear part of dipping tank, and spraying said supernatant from said spraying tool to the treated surface of an article after dipping.

Dependencies are inferred from the claim text.