Abstract: An inkjet printing press is provided which can hold sheets extremely stably. In an inkjet printing press, an inkjet head 3 is provided at the outer periphery of a printing drum 1 rotated in one direction. The printing drum 1 is provided with holding claws 15 which are opened and closed to hold the leading end of the sheet S, and clamps 21 which can be opened and closed for clamping the trailing end of the sheet S. When the clamps 21 are moved from their open positions to their closed positions, the clamps 21 are moved backward with respect to the rotating direction of the printing drum 1 to impart a tensile force to the trailing end of the sheet S and tighten the sheet so that the trailing end of the sheet is held by a clamp 21 with the sheet in its tight state. Also, the clamp 21 is brought into contact with the periphery of the printing drum 1 by an attracting device to assure the holding of the sheet.

Abstract: A line dot recorder which prevents the throughput (print time per sheet) from lowering (time lengthens) in multi-pass dot recording in a predetermined print area on the printing medium being moved by a rotary drum, thereby forms high-quality images efficiently on a plurality of printing papers. The line dot recorder A includes a nozzle head 1 as a recording head having recording elements in the form of a plurality of ink orifices (nozzles) of an inkjet system, a rotary drum 2 having its outer periphery close to the recording head, a paper feed means 3 for supplying paper to the drum, a mounting/holding means 4 for mounting four papers on the drum, and a paper delivery means 5 for delivering paper, and can form high-quality images while eliminating the lowering of throughput by dot recording by a 4-pass multi-pass system in the sub-scanning direction while rotating the drum at quadruple speed and forming images by four rotations of the drum.

Abstract: An inkjet printing press is provided which can hold sheets extremely stably. An inkjet head 3 is provided at the outer periphery of a printing drum 1 rotated in one direction. The printing drum 1 is provided with holding claws 15 which are opened and closed to hold the leading end of the sheet S and clamps 21 which can be opened and closed for clamping the trailing end of the sheet S. When the clamps 21 are moved from their open position to closed position, the clamps 21 are moved backward with respect to the rotating direction of the printing drum 1 to impart a tensile force to the trailing end of the sheet S and tighten the sheet so that the trailing end of the sheet is held by a clamp 21 with the sheet in its tight state. Also, the clamp 21 is brought into contact with the periphery of the printing drum 1 by an attracting means to assure the holding of the sheet.

Abstract: This invention aims to provide a line dot recorder which prevents the throughput (print time per sheet) from lowering (time lengthens) in multi-pass dot recording in predetermined print area on the printing medium being moved by a rotary drum, thereby forming high-quality images efficiently on a plurality of printing papers. The line dot recorder A includes a nozzle head 1 as a recording head having recording elements in the form of a plurality of ink orifices (nozzles) of inkjet system, a rotary drum 2 having its outer periphery close to the recording head, a paper feed means 3 for supplying paper to the drum, a mounting/holding means 4 for mounting four papers on the drum, and a paper delivery means 5 for delivering paper, and can form high-quality images while eliminating the lowering of throughput by dot recording by 4-pass multi-pass system in the sub-scanning direction while rotating the drum at quadruple speed and forming images by four rotations of the drum.