Abstract: In the novel method, light passes upwardly from a light source, through an optical element and then is incident upon a photosensitive layer. A transparent optically-neutral sheet, which may be of glass or plastic, closely spaced above the optical element intercepts extraneous matter that would normally fall on the optical element. At least during the exposing step, the sheet is moved with respect to the optical element to wash out degrading effects of the intercepted material.

Abstract: An automatic apparatus is provided for inserting a mask assembly into a cathode ray tube faceplate panel. The mask assembly includes an apertured shadow mask having at least three springs attached to it with each spring including an aperture. The faceplate panel includes a viewing faceplate portion and a peripheral sidewall. The sidewall includes at least three studs embedded therein for engagement with the spring apertures. The automatic apparatus includes a subassembly at each mask spring location. At least three of said subassemblies are movable horizontally and include a stop for contacting the lower edge of a mask spring. Each movable subassembly also includes a locator pin movable between an engaged position and a disengaged position. The locator pin, when in an engaged position, is spaced from the stop a predetermined spacing equal to a standard spacing between a lower edge of a spring and the centerline of the spring aperture plus a predetermined lifting distance.

Abstract: An abstract for aligning a CRT envelope and the electron gun mount to be inserted into the envelope neck includes fixed members to which the gun mount and envelope are referenced. The envelope is supported at a desired location and in a particular orientation with respect to the reference members. The envelope is rotated to bring the panel sides into a particular position with respect to the reference members. The envelope and gun mount are thus properly aligned.