Patent ID: 6456801
Filing Date: 2002-09-24
Classification: G03G,H04N

Abstract:
An image forming apparatus for reading an image on a document having a main scanning direction and a sub scanning direction and forming a copy image of the image on a copy image forming medium, comprising:conveying means for automatically conveying the document; reading means for reading the image on the document; image forming means for forming an image on a copy image forming medium; sheet feeding means having a plurality of sheet feeding cassettes respectively containing corresponding one of sizes of the copy image forming medium, and a manual feeding tray for manually stacking a desired size of the copy image forming medium, the sheet feeding means feeding sheets selectively from one of the manual feeding tray and the sheet feeding cassettes; automatic document upsetting means for two-dimensionally detecting a size of a first one of the copy image forming medium fed from the manual feeding tray when the sheet feeding means selects the manual feeding tray to feed the copy image forming medium therefrom; and controlling means for controlling the reading means to read the image in accordance with the detected size of the copy image forming medium, and controlling the image forming means for forming the copy image on the copy image forming medium.