METHOD AND APPARATUS FOR GENERATING IMAGES BY SELECTIVE CLEANING OF A SURFACE

摘要

Image generating apparatus includes a template (10) and a high pressure fluid jet washer (12) provided with a suitable applicator and nozzle member (14) which can be controlled by a suitable operator (16). A fluid supply (18) feeds fluid into the washer (12). The template (10) has formed therein one or more apertures (20) which together form one or more images. The template (10) is placed on a surface to be cleaned. The operator (16) then applies the cleaning jet (24) which passes through the apertures (20) while being stopped by the solid parts of the template (10). The generated image is in effect a cleaned pattern in the treated surface . The image can be removed by cleaning the remainder of the surface or by waiting for the surface to become evenly dirty again. The surface which is cleaned is not damaged by this process.