Tokyo Kikai Seisakusho, Ltd.

Noboru Fujio

Seiji Suzuki

Daisuke Nakamura

Yoshinori Uera

Kinichiro Ohno

Kazuyuki Motojima

Tamaki Ohkawara

Yasuo Jitsuishi

A printing unit drive apparatus for a rotary press which includes a single or plural printing units and a single or plural folding units. The drive apparatus includes a motor capable of driving a driven portion of each unit, a connection mechanism for drivingly connecting the motor with the driven portion, and a brake mechanism and a reduction gear mechanism disposed in the connection mechanism. All or some of the motors are selectively combined and operated in a synchronized manner. When supply of electricity to the motors is stopped, the motors stop simultaneously without continuing their independent inertial rotation.

Printing unit drive apparatus for a rotary press

A tension controller for controlling the tension of running paper web. When a rotary press starts to operate and performs a minimum speed operation, the controller balances the tension of the paper web between a floating roller and a dancer roller, thereby easily bringing the dancer roller to the central position of its swing stroke. Also, the tension controller deactivates a dancer roller positioning mechanism in accordance with an acceleration signal before an impression on signal for starting printing is issued, thereby smoothly initiating tension control from the beginning of printing. Further, the displacement range of the dancer roller is divided into a plurality of regions. Based on values detected by three detection sensors for the dancer roller, namely a displacement direction detection sensor, a displacement speed detection sensor, and a displacement position detection sensor, the tension controller controls the driving time of an infeed roller drive transmission regulation unit. Through smooth, stable tension control performed from the beginning of printing, the controller minimizes tension variations, shortens time required until the tension is stabilized, and reduces detection and calculation errors, thereby providing high-accuracy control.

Tension controller for controlling tension of running paper web

An abnormality detector for nozzle-type dampening systems in offset printers, for injecting dampening solution through nozzles onto a receiving part by intermittently opening nozzles with nozzle opening signals generated by a nozzle operation controller, which detects the abnormal injection of dampening solution through the dampening system nozzles is disclosed. The abnormality detector comprises

Abnormality detector for nozzle type dampening systems

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Hamura, Japan

Noboru Fujio