| 摘要 |
PURPOSE:To perform a printing over the entire surface of printing paper, by a method wherein a sucker member moves in synchronous relation to a paper cassette on the same plane as the outer peripheral surface of an impression cylinder and moves upwardly only when the printing paper is sucked and subsequently falls to the same plane as the outer peripheral surface of the impression cylinder immediately after sucking operation. CONSTITUTION:A paper cassette 14 is arranged in close vicinity to the outer peripheral surface of an impression cylinder 2 so as to be positioned in the front side of said cylinder 2 in the supply direction toward a blanket cylinder and a sucker member 32, which sucks the back surface of printing paper P supplied from the paper cassette 14 when comunicates with a paper suction means consisting of a communication hole 29, a flange valve 60 and a suction groove 62 and feeds the printing paper P toward the blanket cylinder, is provided to the impression cylinder 2 and, when said sucker member 32 approaches the printing paper P to suck the same, the paper cassette 14 moves through an intermittent reciprocal motion mechanism 15 in synchronous relation to the revolution of the impression cylinder 2. Further, an energizing member 35 for raising the sucker member 22 at the sucking time of the paper is mounted to the sucker member 32.
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