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Individual
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Individual
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Priority to ES1971168301UpriorityCriticalpatent/ES168301Y/es
Publication of ES168301UpublicationCriticalpatent/ES168301U/es
Application grantedgrantedCritical
Publication of ES168301YpublicationCriticalpatent/ES168301Y/es
Filtro perfeccionado, caracterizado por estar constituído por una pieza de plancha metálica, dotada de una sucesión de cavidades de forma piramidal, con su fondo perforado, iguales entre sí y regularmente espaciadas, dispuestas según dos series de alineaciones perpendiculares entre sí, cuyas cavidades son obtenidas por desplazamiento del material, en una operación de prensado de la plancha entre la superficie, perfectamente lisa, de una contramatriz, y la superficie de una matriz, dotada de una sucesión de pequeños salientes perimetrales, cuya altura coincide sensiblemente con el espesor de la plancha.