Sheet transport system with improved registration

Details Sheet transport system with improved registration Sheet transport system with improved registration

G - Physics

03

G

G03G 15/14 (2006.01) G03G 15/00 (2006.01) G03G 15/16 (2006.01)

Patent

CA 2051897

An apparatus which advances a sheet through a transfer zone and into registration with information developed on a moving member. The sheet is advanced to a position wherein a leading portion thereof is immediately ahead of the transfer zone relative to the forward direction of movement of the moving member and a trailing portion thereof is within the transfer zone. The trailing portion of the sheet is advanced through the transfer zone at a first velocity and the leading edge of the sheet is advanced in a region immediately ahead of the transfer zone at a second velocity, which is less than the first velocity, so as to create a buckle in theleading portion of the sheet positioned immediately ahead of the transfer zone relative to the forward direction of movement of the moving member. The buckle functions to eliminate relative velocity between the photoconductive belt and any portion of sheet within the transfer zone so as to substantially eliminate slip between the sheet and the photoconductive belt.

Cette invention concerne un dispositif servant à faire avancer une feuille à travers une zone de transfert en synchronisme avec l'image développée sur un élément mobile. La feuille est amenée à une position où sa partie avant est sortie de la zone de transfert et où le reste s'y trouve encore. Le reste de la feuille avance dans cette zone à une première vitesse tandis que le bord avant de la feuille avance, à la sortie de ladite zone, à une seconde vitesse inférieure à la première pour que la partie avant de la feuille sortie de ladite zone se gondole. L'idée faire gondoler la feuille ainsi vise à éliminer tout écart de vitesse entre la courroie photoconductrice et une partie quelconque de la feuille à l'intérieur de la zone de transfert et, partant, tout glissement entre les deux.

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