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Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products
(AREA)
Abstract
Un sello perfeccionado, caracterizado por que los signos a imprimir se hallan grabados en relieve sobre una de las caras de un taco de material esponjoso, capaz de almacenar una cantidad importante de una tinta de tipo adecuado, que a temperatura normal presente un coeficiente de evaporación mínimo.
Dispositivo para reproducir textos impresos en un cliché preparado con tinta hectográfica y copiativa, especialmente adecuado para imprimir direcciones.