Importance

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Abstract

In a high speed two up electronic printing system in which dual page images are concurrently printed side by side onto image substrate material and outputted as two parallel individual sheets paired laterally transverse the printing path direction, to increase printing throughput, a sheet output lateral sheet merging and stacking system laterally overlaps the two printed output sheets on top of one another in sheet pairs, and consecutively stacks the sheet pairs on top of one another, to provide a collated output, preferably using a compact a disk stacking system which laterally shifts and superposes the printed paired sheets on top of one another while both sheets of the pair are being arcuately supported and rotated for inversion. Also disclosed is a paired cut sheet input feeding and outside edge sheet registration and spacing system and an interrupted line printing system therefor.

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First Claim