Patent ID: 6517594
Filing Date: 2003-02-11
Classification: B01D,F24F,H01L,Y10S

Abstract:
A chemical tank assembly comprising:a chemical tank containing chemical that emits fumes; an air manager, positioned adjacent to said chemical tank for entraining fumes and preventing their escape, said air manager comprising: a filtered airflow source constructed and arranged to generate an air stream; and an airflow exhaust comprising an exhaust inlet for receiving the air stream; wherein the filtered airflow source and the airflow exhaust are positioned in such a manner that the air stream generated by the filtered airflow source passes across an upper surface of the chemical tank, whereby fumes produced at the surface of the chemical tank are captured by and entrained in the air stream, and transported to the airflow exhaust; and a scroll lid assembly positioned adjacent to said air manager for confining the air stream generated by the filtered airflow source to a region adjacent to the chemical tank, wherein said scroll lid assembly comprises: (i) a thin film member comprising at least one solid portion and at least one cut-out portion; (ii) a first scroll member positioned at a first side of the thin film member for rotatorily moving said thin film member; (iii) a motive driver operatively connected to the first scroll member for rotating said first scroll member; and (iv) optionally, a second scroll member positioned at a second side of said film member for rotatorily receiving the thin film, in synchrony with rotatory movement of the first scroll member.