REGISTRATION OF DUPLEX PRINTED SHEETS IN A SHEET STACKING DEVICE

An improved method of printing and stacking sheets (41) that improves the relative alignment of images in a stack of printed sheet. The method comprises the steps of:- feeding a sheet (41) at least twice past a printhead assembly (31) for printing an image (I1, I2) on both sides of the sheet (41), w...

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Bibliographische Detailangaben
Hauptverfasser:	BORCHERT, Christopher J, ARTAR, Müge, BLOM, Ronnie E.A, WIND, Anne A
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CINEMATOGRAPHY CONVEYING CORRECTION OF TYPOGRAPHICAL ERRORS ELECTROGRAPHY ELECTROPHOTOGRAPHY HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MAGNETOGRAPHY PACKING PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS STORING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	An improved method of printing and stacking sheets (41) that improves the relative alignment of images in a stack of printed sheet. The method comprises the steps of:- feeding a sheet (41) at least twice past a printhead assembly (31) for printing an image (I1, I2) on both sides of the sheet (41), wherein in the first and second passes the respective front and back images (I1, I2) are aligned with respect to a first edge (E1) of the sheet (41) by detecting a skew angle (A3) between the first and second edges (E1, E2) and applying the skew angle to align the front and back images;- stacking the sheet (41) wherein the sheet (41) is registered to a predetermined stacking reference direction (Y) by one of its edges, characterized in that during the step of stacking the sheet (41) is registered by its first edge (E1).