Patent ID: 6918585
Filing Date: 2005-07-19
Classification: B41J,B65H,G03G

Abstract:
1. A paper conveyance guiding apparatus in a duplex printer having a printer body and a printing unit, comprising: an entrance passage disposed at the printing unit forming an image on a sheet of paper to guide the paper to enter into the printing unit; a discharge and reverse passage formed to connect an outlet of the printing unit with an outside of the printer body and guide discharging of the paper and reversing of the paper to an inlet of the printing unit; an intermediate passage formed to connect the discharge and reverse passage with the entrance passage and guide the reversed paper to reenter into the printing unit through the entrance passage; a reversible rotation roller disposed at a branching point of the discharge and reverse passage and the intermediate passage to discharge the paper coming out from the outlet of the printing unit to the outside of the print body by rotating forwardly and push the paper from the discharge and reverse passage to the intermediate passage by rotating backwardly; and a discharging drive roller disposed such that the paper is disposed between the discharging drive roller and the reversible rotation roller at the discharge and reverse passage, the discharging drive roller driving one side of the paper while the reversible rotation roller drives another side of the paper to discharge the paper coming out from the outlet of the printing unit to the outside of the print body.