Patent ID: 7224481
Filing Date: 2007-05-29
Classification: H04N

Abstract:
1. An image forming apparatus comprising: plural image forming units arranged for respective color components at predetermined intervals; a transportation unit arranged to transport recording sheets respectively to said plural image forming units; a delay memory arrange to delay sending of image data for a time required to transport the recording sheet between said plural image forming units; a length holding unit arrange to store, for each page, the length of one page of the image data for image formation in the main scan direction and the length of one page of the image data in the sub scan direction, the length of the image data in the main scan direction and the length of the image data in the sub scan direction stored in said length holding unit being determined for each page according to an image size of the image data, and the length of the image data in the main scan direction and the length of the image data in the sub scan direction determined for each page being stored in said length holding unit as much as plural pages; a writing control unit arranged to control writing of the image data of plural successive pages into said delay memory on the basis of the length of the image data in the main scan direction and the length of the image data in the sub scan direction stored in said length holding unit; and a reading control unit arranged to control reading of the image data stored in said delay memory on the basis of the length of the image data in the main scan direction and the length of the image data in the sub scan direction stored in said length holding unit.