Hamada Printing Press Co., Ltd.

Haruhiko Koto

Makoto Miyaji

Osamu Satake

Masaru Nakano

Hiroyuki Santo

Hirofumi Tsuji

An inkjet printing press is provided which can hold sheets extremely stably. In an inkjet printing press, an inkjet headis provided at the outer periphery of a printing drumrotated in one direction. The printing drumis provided with holding clawswhich are opened and closed to hold the leading end of the sheet S, and clampswhich can be opened and closed for clamping the trailing end of the sheet S. When the clampsare moved from their open positions to their closed positions, the clampsare moved backward with respect to the rotating direction of the printing drumto 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 clampwith the sheet in its tight state. Also, the clampis brought into contact with the periphery of the printing drumby an attracting device to assure the holding of the sheet.

Inkjet printing press

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 headas a recording head having recording elements in the form of a plurality of ink orifices (nozzles) of an inkjet system, a rotary drumhaving its outer periphery close to the recording head, a paper feed meansfor supplying paper to the drum, a mounting/holding meansfor mounting four papers on the drum, and a paper delivery meansfor 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.

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Osaka, Japan

Makoto Miyaji