METHOD FOR MAKING SLIT OPENINGS IN FILTERING AND SPRAYING MEMBER AND FILTERING AND SPRAYING MEMBER Russian patent published in 2002 - IPC

FIELD: power machine engineering, namely systems for cleaning and spraying liquids such as water in many branches of national economy, mainly in distributing apparatuses of water preparation filters in central heating and power plants and other power plants. SUBSTANCE: method for making filtering and spraying member comprises steps of punching slit openings in plate being strip of predetermined thickness; at first with use of die set punching technological slit openings whose width exceeds target width in plate-strip with thickness consisting 0.5 of predetermined one; then superimposing one onto another two prepared plates in such a way that to provide matching of slit openings according to their lengthwise pitch; shifting them according to their crosswise pitch until forming working slit opening of desired width; then mutually joining said plates. Filtering and spraying member includes detachably joined two plates - strips with technological windows having constant width, providing at constant size of tool possibility for regulating width of working windows; or said member includes non-detachably joined two plates - strips of constant width. EFFECT: enhanced quality of filtering and spraying members, simplified process for making them, enlarged assortment. 3 cl, 5 dwg, 1 ex, 1 tbl