Sheet infeed mechanism

An infeed mechanism for a sheet fed printing machine, especially for printing high quality multicolor images, comprises a chute (25; 15, 27) for guiding a sheet from a staging position into a moving gripper (17, 19, 32, 33) comprising movable gripper fingers (32). To improve the reliability and accu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	NOTHMANN, GERHARD W
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:	An infeed mechanism for a sheet fed printing machine, especially for printing high quality multicolor images, comprises a chute (25; 15, 27) for guiding a sheet from a staging position into a moving gripper (17, 19, 32, 33) comprising movable gripper fingers (32). To improve the reliability and accuracy of placement of the sheet leading edge into the gripper throat (30), a plurality of flexible strips (31), each longer than the one above, is attached to the chute bottom edge (27) facing the grippers, the strips coming into sequential resilient contact with the open gripper fingers (32). The strips therefore become a flexible extension of the lower edge of the chute and serve to constrain the sheet lead edge movement into the moving gripper fingers regardless of instantaneous mechanical misalignments and sheet imperfections.