초록 ▼

Apparatus is provided for treating articles, such as printed circuit boards and the like, by removing solid particles, such as polymer resists, by a chemical action such as a stripping action, with the chemical action being provided by spraying a solution onto the articles. The removed particles are

Apparatus is provided for treating articles, such as printed circuit boards and the like, by removing solid particles, such as polymer resists, by a chemical action such as a stripping action, with the chemical action being provided by spraying a solution onto the articles. The removed particles are then separated from the solution, by novel separation apparatus, so that the solution can be re-used. The novel separation apparatus employs one or more screens or filters that are angularly disposed to allow solution to fall through the screen or screens, and solution is provided in such a manner as to wash along or across the screen or screens, to wash particles into a residence zone, from which they may be evacuated. The particles are preferrably propelled from the residence zone on a periodic basis, for subsequent filtration, whereby the solution in which they are carried may likewise be returned for re-use.

대표청구항 ▼

An apparatus for chemically removing solid matter from articles being treated by a chemical treatment liquid and filtering from the treatment liquid the solid matter thus removed, said apparatus including a treatment chamber, article supporting means in an upper portion of said chamber for supportin

An apparatus for chemically removing solid matter from articles being treated by a chemical treatment liquid and filtering from the treatment liquid the solid matter thus removed, said apparatus including a treatment chamber, article supporting means in an upper portion of said chamber for supporting articles being treated, means for delivering treatment liquid to spray means in said chamber for spraying onto articles supported therein for removal of solid matter from articles by the spray of the treatment liquid and collection means at a lower portion of said chamber for collecting treatment liquid for recycling to said delivery means, said apparatus including: (a) separating filter means disposed at a sufficiently acute angle to the vertical to allow falling treatment liquid to pass therethrough and to allow solid matter not passing through the filter means to be washed along the filter means; (b) filter washing means for delivering treatment liquid across said filter means for washing solid material therealong; (c) a residence zone at a lower end of said separating filter means for receiving solids washed along the filter means, and distinct from said collection means; and (d) evacuation means for evacuating an evacuate of treatment liquid and solid material from said residence zone; wherein said residence zone for receiving solid material and treatment liquid is defined by having a discharge line connected thereto comprising means for receiving treatment liquid flowing into said residence zone and delivering said liquid to means for recycling it back to the upper portion of said chamber, and wherein said evacuation means includes propulsion means for delivering a stream of treatment liquid through said residence zone to evacuate accummulated solid material therefrom.