Chemical milling machine

Claim 1

IN AN ETCHING MACHINE OF THE TYPE IN WHICH AN ETCHANT IS CONTINUOUSLY SPRAYED AGAINST THE WORKPIECE, THE COMBINATION OF: A HOUSING DEFINING AN ENCLOSED ETCHING CHAMBER AND AN ACCESSIBLE RINSE CHAMBER; PALLET MEANS FOR THE WORKPIECE MOUNTED IN A FIRST HORIZONTAL PLANE AND SLIDABLE BETWEEN SAID RINSE CHAMBER AND SAID ETCHING CHAMBER; AT LEAST ONE MANIFOLD MOVABLY MOUNTED IN SAID ETCHING CHAMBER IN A SECOND HORIZONTAL PLANE SPACED FROM AND PARALLEL TO SAID FIRST HORIZONTAL PLANE; A PLURALITY OF SPRAY NOZZLES MOUNTED ON SAID MANIFOLD, PUMP MEANS COUPLED TO SAID MANIFOLD FOR SUPPLYING PRESSURIZED ETCHANT TO SAID SPRAY NOZZLES, AND ACTUATING MEANS COUPLED TO SAID MANIFOLD FOR IMPARTING RECIPROCAL MOTION TO SAID MANIFOLD ALONG MUTUALLY PERPENDICULAR AXES IN SAID SECOND PLANE.