Cutting device, finisher and bookbinding system provided therewith

A finisher comprising:

• (a) a bookbinding processing section which aligns a plurality of sheets and binds the sheets;
• and
• (b) a cutting device which cuts en edge portion of a sheet bundle that has been bound by the bookbinding processing section, the cutting device comprising:
• (1) a cutting blade which cuts the edge portion of the sheet bundle;
• (2) a paddle provided on a side of the cutting blade, which removes chips attached to the cutting blade by rubbing a side surface of the cutting blade;
• and
• (3) a controller which controls drive of the paddle,
• wherein the controller comprises a judging section which compares a length of the chips in a direction perpendicular to an edge side of the sheet bundle to be cut by the cutting blade with a predetermined length that has been preset, and
• wherein when the judging section judges that the length of the chips is shorter than the predetermined length, the controller controls the paddle to rotate in a predetermined direction, and when the judging section judges that the length of the chips is longer than the predetermined length, the controller controls the paddle to rotate in a direction opposite to the predetermined direction.

A book binding system comprising:

• (a) an image forming apparatus having an image forming section that forms an image on a sheet;
• (b) a finisher finishes a plurality of sheets each on which the image has been formed by the image forming apparatus to form a sheet bundle, an edge portion of which is cut by a cutting device to form a book,
• the cutting device comprising:
• (1) a cutting blade which cuts the edge portion of the sheet bundle;
• (2) a paddle provided on a side of the cutting blade, which removes chips attached to the cutting blade by rubbing a side surface of the cutting blade;
• and
• (3) a controller which controls drive of the paddle;
• wherein the controller comprises a judging section which compares a length of the chips in a direction perpendicular to an edge side of the sheet bundle to be cut by the cutting blade with a predetermined length that has been preset, and
• wherein when the judging section judges that the length of the chips is shorter than the predetermined length, the controller controls the paddle to rotate in a predetermined direction, and when the judging section judges that the length of the chips is longer than the predetermined length, the controller controls the paddle to rotate in a direction opposite to the predetermined direction.