Patent ID: 8047542
Filing Date: 2011-11-01
Classification: B65H

Abstract:
1. A printing apparatus which forms images on a surface of a print sheet transported on a transportation route by an image forming unit, the printing apparatus comprising: a paper feeding unit operable to feed a print sheet from a paper feed tray to the transportation route through a paper feed route; a first paper size determination unit operable to measure the size of print sheets stored in the paper feed tray; a second paper size determination unit operable to measure the size of a print sheet which is being transported on the transportation route or the paper feed route; and a transportation operation adjusting unit operable to adjust an operation of transporting a print sheet on the transportation route or the paper feed route on the basis of a measurement result of the second paper size determination unit and continue the operation of transporting the print sheet by performing an operation of correcting an interval between print sheets when the measurement result of the second paper size determination unit differs from a measurement result of the first paper size determination unit, wherein a resist unit is located at a junction point between the transportation route and the paper feed route, and wherein the transportation operation adjusting unit is provided with an acceleration/deceleration drive unit operable to accelerate and decelerate the transportation of a print sheet between the resist unit and the paper feeding unit, and correct an interval between print sheets on the transportation route or the paper feed route by the use of the acceleration/deceleration drive unit.