Kabushiki Kaisha Tokyo Kikai Seisakusho

Kazuharu Soutome

Masahiko Miyoshi

Kiyohisa Asanuma

A BB-type printing press employing a divided plate cylinder has a novel drive gear train for avoiding rotation in the associated rotating condition and whereby to maintain satisfactory level of sharpness and/or clearness of printed patterns. The BB-type printing press comprises a pair of plate cylinders respectively carrying printing plates, each of the plate cylinders being separated into axially aligned a first plate cylinder component and a second plate cylinder component for rotation at independently adjustable rotational phases, a pair of blanket cylinders respectively carrying blankets and associated with the plate cylinders for receiving printing pattern of the printing plates to transfer onto both sides of a printing medium, the blanket cylinders having slightly different finished diameters from that of the plate cylinders, and a drive gear train for driving the plate cylinders and the blanket cylinders in synchronism with each other with maintaining desired phase relationship therebetween, the drive gear train establishing a path for power transmission so that the driving power is first transmitted to one of the plate cylinders and the blanket cylinders having smaller finished diameter and subsequently to the other.

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Zama, Japan

Kazuharu Soutome