Abstract: One or more flexible printing plates are installed on a print cylinder through the use of one or more slots formed axially along the cylinder. A resilient spring clip is inserted into the slot, followed by a plate registration bracket with a registration pin which is secured in the slot by retaining screws. Each printing plate has a lead edge and a tail edge with a notch in each edge. A lead edge is inserted into the slot and is tensioned against a side wall of the slot by the spring clip. The notch on the lead edge engages the registration pin on the bracket. A tail edge is then inserted into the slot between the lead edge and the spring clip. The tail edge notch also engages the registration pin.