Abstract: An image forming apparatus of the present invention includes a first identification section for identifying whether a print target page in a print target document is color or monochrome and its page attribute, a second identification section for identifying a system speed during printing of an immediately preceding page of the print target page, a third identification section for identifying a presence of a subsequent page of the print target page and its page attribute, and a system speed determination section for selecting a print mode in conformity to a monochrome/color discrimination result based on an identification result in the first identification section and determining a system speed of the print target page based on the page attribute identified by the first identification section and identification results in the second and third identification sections.

Abstract: An image forming apparatus of the present invention includes a first identification section for identifying whether a print target page in a print target document is color or monochrome and its page attribute, a second identification section for identifying a system speed during printing of an immediately preceding page of the print target page, a third identification section for identifying a presence of a subsequent page of the print target page and its page attribute, and a system speed determination section for selecting a print mode in conformity to a monochrome/color discrimination result based on an identification result in the first identification section and determining a system speed of the print target page based on the page attribute identified by the first identification section and identification results in the second and third identification sections.

Abstract: A copying machine which has a function to contain sheets, each of which has an image on a first side, in a refeeding unit and refeed the sheets for forming an image on a second side. The refeeding unit has an intermediate tray, a pick-up roller for refeeding the sheets one by one and a containing section for feeding the sheets to the intermediate tray. Each of the sheets is fed into the intermediate tray by a first or a second roller of the containing section. The containing section is movable along a transporting way and set at such a position that the first and the second roller are positioned corresponding to the size of sheets to be contained in the intermediate tray.

Abstract: A sheet reversing apparatus which has a take-in path, a reversing path which extends from the take-in path in a substantially same direction, a take-out path which extends from a junction of the take-in path and the reversing path in a substantially perpendicular direction to the extending direction of the reversing path. A sheet is fed from the take-in path to the reversing path, and when the trailing edge of the sheet comes out of the take-in path, the sheet is fed back from the reversing path to the take-out path. In an entrance portion of the reversing path, a first reversing roller which is driven to rotate in a feed-back direction toward the take-in path and a second reversing roller which is capable of coming into contact with and moving away from the first reversing roller are provided.