Adjustable mask

Claim 1

IN A VAPOR DEPOSITION APPARATUS, AN ADJUSTABLE MASKING COMPRISING: A GENERALLY RECTANGULAR FRAME HAVING TWO SETS OF GENERALLY PARALLEL SIDES, SAID FRAME ADAPTED TO BEING ATTACHED TO THE TOP OF A METAL EVAPORATOR IN THE HORIZONTAL PLANE; A PLURALITY OF ARCUATE SHIELDING MEMBERS, SAID SHIELDING MEMBERS COMPRISING A BAR HAVING A LONGITUDINAL AXIS, TWO ENDS WITH LIPS EXTENDING THEREFROM, AND A PLURALITY OF CUT OUT SECTIONS SPACED ALONG SAID LONGITUDINAL AXIS, SAID BAR BEING CAPABLE OF BEING DISPOSED HORIZONTALLY ACROSS SAID FRAME AND SAID EXTENDING LIPS ADAPTED TO ADJUSTABLY ENGAGE OPPOSITE SIDES OF SAID FRAME; AND, A PLURALITY OF SUPPORT MEMBERS, SAID SUPPORT MEMBERS HAVING A LONGITUDINAL AXIS AND TWO ENDS, SAID SUPPORT MEMBERS CAPABLE OF BEING DISPOSED WITHIN THE FRAME IN A DIRECTION NORMAL TO THE LONGITUDINAL AXIS OF SAID SHIELDING MEMBERS AND SAID SUPPORT MEMBERS BEING ADAPTED TO SLIDABLY ENGAGE SAID CUT OUT SECTIONS IN SAID SHIELDING MEMBERS AND TO FORM A FLUSH TOP SURFACE THEREWITH, THEREBY FORMING A GRID WITHIN SAID FRAME AND HAVING A CONVEX TOP SURFACE, WHEREIN SAID TOP SURFACE IS JUXTAPOSED TO THE SUBSTRATE SURFACE TO BE COATED AND WHEREBY SAID SHIELDING MEMBERS MAY BE SELECTIVELY, LONGITUDINALLY POSITIONED BY SLIDING ALONG SAID SUPPORT MEMBERS TO ANY DESIRED POSITION WITHIN SAID FRAME.