Mitsubishi Heavy Industries Limited

Hiroaki Ikeda

Masahiro Matsubara

Mitsuru Tabuchi

Yasuharu Suda

Hitoshi Hirose

Hitoshi Isono

Toyofumi Shimada

Tomoaki Okada

Hiroyoshi Kawamura

Hajime Yagi

Hiroya Nishii

Toshiyuki Urano

Takuya Uematsu

Yuji Mizuho

Toshihiko Yamanaka

The plate-making printing press is constructed by installing a plate-making apparatus in a printing press that supplies ink and dampening water to a printing plate and performs printing on a medium. In order to realize a high-precision plate-making operation, the printing press is equipped with a target disposed on the printing cylinder and a sensor for detecting the target and provided on the writing device, and the zero point of the encoder is corrected. Furthermore, at the time of plate-making, the adjustment mechanism is operated so that the printing cylinder is returned to the position of the point of origin.

Plate-making type printing press, multi-color printing press and plate-making type printing method

The regenerative plate making and printing process, and plate making and printing apparatus of the present invention are applied to a printing system requiring a separate developing step independent of a printing step. In accordance with the present invention, by repeatedly conducting (A) a photosensitive layer-coating step of coating a photosensitive plate material onto a substrate to prepare a photosensitive lithographic plate having a photosensitive layer thereon; (B) an exposure step of exposing the photosensitive layer to image light; (C) a development step of supplying a plate-treating agent to the photosensitive layer to form developed images thereon; (D) a printing step of supplying a printing ink and dampening water to surfaces of the thus obtained images to conduct printing; and (E) a substrate regeneration step of removing the image portions from the substrate to regenerate the substrate, on the same rotary drum or conveyer, it is possible to considerably improve the working efficiency and stably provide high-quality images.

Regenerative plate making and printing process, and plate making and printing apparatus

A method for making a reusable printing plate in which a hydrophobic image area is formed on a hydrophilic plate surface containing a photocatalyst. The method includes the steps of carrying out a hydrophobic agent application process in which a solution containing an organic compound having a property of reacting with the plate surface by a heating process and a property of being decomposed by the action of the photocatalyst when irradiated by light having a higher energy than a band gap energy of the photocatalyst is applied on the plate surface; carrying out an image area formation process in which a part of the plate surface is subjected to a heating process to form a hydrophobic image area; and carrying out a non-image area formation process in which the organic compound applied to an area other than the hydrophobic image area on the plate surface is removed.

Method for producing printing plate, reusing method for printing plate, and printing machine

An image forming apparatus and method in which the flow of a toner image formed on an image carrier is prevented at the time of removing a surplus liquid developer and at the time of transfer of the image onto a transfer material. The apparatus includes an image carrier, a device for forming an electrostatic latent image on a surface of the image carrier, and a developing section for supplying a liquid developer onto the electrostatic latent image so as to form a toner image. The apparatus also includes a device for removing a surplus liquid developer remaining on the surface of the image carrier after the toner image is formed. A transfer device transfers the toner image onto a surface of a transfer material. An electric charge giving device, which is disposed between the developing section and the device for removing the surplus liquid developer, applies an electric charge to the toner image in a same polarity as that of the toner image.

Image forming apparatus and image forming method

Growing community of inventors

Mihara, Japan

Hiroaki Ikeda