Ricoh Company, Ltd.

Keiichi Miyakawa

Hiroshi Kanno

Toshio Endo

Masao Takano

Mitsuo Sato

Hironobu Takasawa

Takashi Miyagi

Tomoya Ito

In a screen printing machine, its printing-plate discharge unit is provided with: a pair of printing-plate discharge rollers which may approach to a peripheral surface of a plate cylinder and may also draw therefrom; and a waste-paper container for receiving a waste printing plate having been peeled from the peripheral surface of the plate cylinder. In the waste-paper container is provided a waste printing-plate compression plate which is vertically movable in the waste-paper container. The compression plate is moved up and down in the waste-paper container by means of an operation means which is provided in a position outside the waste-paper container. The compression plate compresses the waste printing plate in the waste-paper container when moved downward therein.

Screen printing machine with waste printing plate discharge means

A speed control method for printing press wherein a predetermined reference value of rotation speed of a plate cylinder is set in a controller, and when a rotation speed which differs from the reference value to exceed it is set in the controller, the plate cylinder is started to rotate at a speed lower than the reference value and the rotation speed of the plate cylinder is then increased stepwise at the rate of printing integer sheets of printing paper until it reaches the set rotation speed.

Speed control method for printing press and printing press practicing

Growing community of inventors

Miyagi, Japan

Keiichi Miyakawa