Ricoh Company, Ltd.

Toshio Endo

Mitsuo Sato

Hiroshi Kanno

Masao Takano

Keiichi Miyakawa

Hironobu Takasawa

Takashi Miyagi

Tomoya Ito

A thermally operated plate making apparatus with a capability of producing a plate which carries a plurality of images of a small-size original document side by side thereon by a continuous operation includes a document transport roller pair for transporting an original document, a reading device made up of optical elements a CCD image sensor and others for reading the document and sensors for sensing the transport conditions of the document, and a writing device made up of a thermal head for engraving an image of the document in a stencil and a stencil transport roller pair for transporting the stencil. A control device is provided for controlling the entire apparatus to engrave a plurality of document images in a plate making area of the stencil in a continuous manner. The control device comprises a CPU, a ROM, a RAM, etc.

Thermally operated apparatus for making a plate

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

Shiroishi, Japan

Toshio Endo