This invention relates to a book binding machine, and more particularly to a book binding machine provided with a sheet gathering mechanism.
Some conventional book binding machines are designed to receive a set of gathered sheets from the other machine such as a printing machine and a copying machine (these machines are collectively referred as a "printing machine" in the following sentences.) and stitch the set of collated sheets along the center line thereof or along an end line thereof or at a corner thereof.
Such book binding machines requires a sheet gathering machine, when it is coupled to a printing machine adapted for ejecting sheets one by one in the order of page number.
The sheet gathering machine has been manufactured so far without considering that it is arranged between a book binding machine and a printing machine. Therefore, on installing the sheet gathering machine, it is necessary to adjust the position of the sheet gathering machine with respect to both the book binding machine and the printing machine, which leads to considerably troublesome work. In addition, the sheet gathering machine occupies a broad space for installation.