System for deflecting an intermediate item in a folding unit

A mechanism (100 a or 100 b) for preventing folding of an intermediate item (300) in a knife folder (200), the intermediate item (300) is a sheet having one or more folds (302, 304) thereon, the knife folder (200) includes a knife blade (210), a stopper (220) and one or more pairs folding rollers (230 a and 230 b), the knife blade (210) is movable between a non-operating knife position (210 a) and an operating knife position (210 b);

• and for folding the intermediate item (300) by the knife folder (200), the intermediate item (300) is moved on the folding rollers (230 a and 230 b), the knife blade (210) is moved to the operating knife position (210 b) to press on a fold line (303) of the received intermediate item (300), the stopper (220) restricts a linear movement of the intermediate item (300) on the folding rollers (230 a and 230 b) in an entry direction (303) of the intermediate item (300) and the folding rollers (230 a and 230 b) are rotated to fold the intermediate item (300) and moves the folded intermediate item (300 a) through a roller gap (232) between the folding rollers (230 a and 230 b), the non-operating knife position (210 a) is a position of the knife blade (210) at which the knife blade (210) is not in a physical contact with the intermediate item (300), the mechanism (100 a or 100 b) comprises:
• a deflector (50) movably arranged on a frame (201) of the knife folder (200), the deflector (50) is movable between a non-operating position (50 a) and an operating position (50 b), the non-operating position (50 a) is a position of the deflector (50) at which a deflector end (20 or 30) of the deflector (50) is not in a physical contact with the intermediate item (300) received at the knife folder (200), the operating position (50 b) is a position where the deflector end (20) of the deflector (50) is physically in contact with the intermediate item (300);
• wherein for preventing the folding of the intermediate item (300) by the knife folder (200), when the intermediate item (300) is moving on the folding rollers (230 a and 230 b), the deflector (50) is moved to the operating position (50 b) for deflecting the received intermediate item (300) towards the roller gap (232) by the deflector end (20) of the deflector (50);
• and upon rotation of the folding rollers (230 a and 230 b), the intermediate item (300) moves away from the knife folder (200) through the roller gap (232).