Recording sheet conveyance device for use with an image forming apparatus

A sheet conveyance apparatus for conveying a sheet so that an image of a document is duplicated on both sides of said sheet by an image forming apparatus, comprising:

• a first conveyance path for conveying said sheet to an image forming section of said image forming apparatus;
• a second conveyance path for conveying said sheet from said image forming section to a tray means for holding said sheet;
• a third conveyance path for conveying said sheet from said tray means to said image forming section;
• holding and forwarding means, positioned in a vicinity of said tray means, for holding said sheet conveyed through said second conveyance path, and for then forwarding said sheet into said third conveyance path;
• wherein:
• in a first mode of operation of said sheet conveyance apparatus, said sheet is forwarded after being held by said holding and forwarding means, without said sheet being placed on said tray means, into said third conveyance path by said holding and forwarding means;
• in a second mode of operation of said sheet conveyance apparatus, said sheet is first placed on said tray means and then forwarded into said third conveyance path by said holding and forwarding means;
• in a third mode of operation of said sheet conveyance apparatus, at least two documents respectively having an image formed on one side thereof, are respectively duplicated on each side of said sheet;
• and
• in a fourth mode of operation of said sheet conveyance apparatus, a two-sided document is duplicated on both sides of said sheet;
• fixing condition selection means for inputting into the sheet conveyance apparatus, at least one of a sheet thickness data, a sheet size data, a plurality of data indicating a magnification of the image to be provided on said sheet and a mode of operation data for indicating a mode of operation of said sheet conveyance apparatus;
• and
• selecting means for selecting one of the first, second, third and fourth modes of operation of said sheet conveyance apparatus based on the selected at least one of the sheet size data, the sheet thickness data, the plurality of data indicating a magnification of said image to be provided on said sheet and the mode of operation data.