ALZADORA DE HOJAS CON COMPARTIMENTOS SUPERPUESTOS

LA ENSAMBLADORA DE HOJAS COMPRENDE UN BASTIDOR (10) UNA PLURALIDAD DE CASILLAS (20) SUPERPUESTAS EN ESTE BASTIDOR PARA LA CARGA DE PILAS DE PAPEL (28), ESTANDO EQUIPADA CADA CASILLA (20) CON UN DISPOSITIVO DE EYECCION DE HOJAS INDIVIDUALES Y CON UN DISPOSITIVO DE TRANSFERENCIA, Y UN TRANSPORTADOR VERTICAL (26) ADYACENTE A LO DISPOSITIVOS DE TRANSFERENCIA DE LAS CASILLAS (20) PARA RECIBIR, MEDIANTE DISPOSITIVOS DE TRANSFERENCIA HOJAS EYECTADAS DE SU CASILLA Y PARA ENCAMINARLAS HACIA UN PUESTO DE ENSAMBLAJE. EL DISPOSITIVO DE EYECCION COMPRENDE VARIAS CINTAS PERFORADAS SIN FIN (34) MONTADAS SOBRE DOS RODILLOS DE REENVIO (36, 38) SEPARADOS Y UNA CAMARA DE DEPRESION (46) ENVUELTA POR LAS CINTAS (34) QUE TIENE ABERTURAS DE PASO DE AIRE DISTRIBUIDAS EN SU PARED INFERIOR QUE ES ADYACENTE A LA CARA INTERNA DEL TRAMO INFERIOR DE LAS CINTAS (34). LA CARA OPUESTA DEL TRAMO INFERIOR DE LAS CINTAS (34) ESTA SITUADA ENFRENTE DE LA HOJA SUPERIOR (28A) DE LA PILA PARALELAMENTE A ESTA Y A UNA DISTANCIA ESENCIALMENTE MANTENIDA CONSTANTE POR UNA PLACA MOVIL (22) SOBRE LA QUE DESCANSA LA PILA (28). The sheet-collating device comprises a frame (10), a plurality of compartments (20) which are superposed in this frame for loading stacks of paper (28), each compartment (20) being equipped with a device for ejecting individual sheets and a transfer device, and a vertical conveyor (26) adjacent to the transfer devices of the compartments (20) in order to receive, by means of these transfer devices, sheets ejected from their compartment, and in order to convey them towards a collating station. The ejection device comprises several perforated endless belts (34) mounted on two spaced-apart return (idle) rollers (36, 38) and a chamber (46) at reduced pressure (under partial vacuum) which is surrounded by the belts (34) and has air-passage openings distributed in its lower wall which is adjacent to the inner face of the lower strand (34a) of the belts (34). The opposite face of the lower strand of the belts (34) is located opposite the upper sheet (28a) of the stack parallel to the latter and at a distance which is maintained essentially constant by means of a movable plate (22) on which the stack (28) rests.