Patent ID: 6320674
Filing Date: 2001-11-20
Classification: B41J,G03G,H04N

Abstract:
An image forming apparatus for producing a copy set of a document having ""N"" plural original pages by recording two original pages of the plural original pages on both sides of respective recording sheets, said image forming apparatus comprising:an image reading device that reads an image on each of the plural original pages at a reading section and then outputs image data;a memory that stores the image data therein;an image recording device that records an image on an original page on one side of one of the recording sheets based on the image data stored in the memory so that a one-sided recording sheet bearing an image on one side thereof is produced;a sheet feeder that feeds the recording sheets to the is image recording device;a re-conveying device comprising a reversing device and a re-conveyance passage that re-convey the one-sided recording sheet bearing the image on one side thereof from the image recording device to the image recording device, wherein the reversing device reverses the one-sided recording sheet so that the image recording device can record another image on the other side of the one-sided recording sheet, and wherein the re-conveyance passage has a length to convey ""m"" plural one-sided recording sheets serially simultaneously so that the re-conveying device re-conveys the plural one-sided recording sheets to the image recording device without stacking the plural one-sided recording sheets on an intermediate tray, where N>(2.times.m);a controller that controls the image recording device, the sheet feeder and the re-conveying device such that after the image reading device reads (2.times.m) original pages of the plural original pages and the memory stores the image data of the (2.times.m) original pages, the image recording device starts recording to record images based on the image data of the (2.times.m) original pages stored in the memory onto both sides of ""m"" recording sheets while the image reading device successively reads (N-(2.times.m)) remaining original pages of the plural original pages.