SHEET HANDLING APPARATUS WITH ROTARY DRUM

According to the present invention a sheet handling apparatus is provided which comprises a rotary drum (31) with openings at its peripheral wall. A strip (35) with perforations formed therein spirals circumferentially over an outer surface of the drum in a circumferential spiralling direction, such...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NOLTING, Erik E.M, HOLLANDS, Peter J
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONVEYING CORRECTION OF TYPOGRAPHICAL ERRORS HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PACKING PERFORMING OPERATIONS PRINTING PRINTING MACHINES OR PRESSES SELECTIVE PRINTING MECHANISMS STAMPS STORING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	According to the present invention a sheet handling apparatus is provided which comprises a rotary drum (31) with openings at its peripheral wall. A strip (35) with perforations formed therein spirals circumferentially over an outer surface of the drum in a circumferential spiralling direction, such that a screen is formed over the drum. A suction system controls a flow of air through the perforations thereby to attract sheets towards the drum. The strip is biased by means of a tensioning assembly (40,41), which exerts a tensioning force on the strip substantially parallel to the circumferential spiralling direction of the strip.