1. Field of the Invention
The present invention relates to a sheet-bundle conveying method, a sheet-bundle conveying apparatus used in such a sheet-bundle conveying method, and a bookbinding apparatus having such a sheet-bundle conveying apparatus. More particularly, it relates to a sheet-bundle conveying method, a sheet-bundle conveying apparatus used in such a sheet-bundle conveying method, and a bookbinding apparatus having such a sheet-bundle conveying apparatus, in which, after output sheets are book-bound, the book-bound sheet-bundle is conveyed.
2. Related Background Art
In conventional bookbinding apparatuses for an image forming apparatus such as a printer, a sheet-bundle conveying means served to convey a sheet bundle comprised of imaged sheets from an alignment portion to a bookbinding portion and then from the bookbinding portion to a containing portion. In particular, a shiftable tray for conveying and containing the sheet-bundle to the containing portion was bulky for maintaining a large shifting amount of the tray and for ensuring the rigidity of the tray.