Verfahren zur Handhabung eines Blattdefektfehlers in einem Duplexdruckprozess

Details

Veröffentlichungs-Nr.

EP3991977

Aktenzeichen

EP20204779

Anmeldetag

29. Oktober 2020

Veröffentlichung

31. Dezember 2025

Erteilung

31. Dezember 2025

Rechtsraum

EP

IPC

B41J3/60B65H29/60B41J13/00B65H29/62B65H85/00

Abstract

A method of handling a sheet defect error in a duplex print process wherein media sheets (12, 14, 18) are successively supplied along a feed path (10) and are moved past a print engine (16) where a first image is printed on a first side of each sheet in a first print pass, the sheets are then returned, via a duplex loop (24) that contains a sheet flipping mechanism (26), to the feed path (10) upstream of the print engine (16) so that a second image can be printed on a second side of each sheet in a second print pass, the finished sheets (18) being then discharged in a predetermined page sequence, and wherein, when a sheet defect is found a first print pass of a sheet (s16), the defective sheet is diverted into an eject path (32) downstream of the print engine (16), and a print pass for an immediate successor (s3) of the defective sheet is skipped, characterized in that the subsequent semi-finished sheets (14) are recirculated in the duplex loop (24) while the supply of fresh sheets (12) into the feed path (10) is interrupted, and duplex printing is resumed during or after recirculating the subsequent semi-finished sheets (14).

Anmelder

Firma

Canon Production Printing Holding B.V.

Land

🇳🇱 Niederlande

Fachgebiete