Toshiba Kikai Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Mitsuhiko Iida

Makoto Hayashi

Koichi Ishii

Yasuo Kato

Mitsunaga Saito

Hitoshi Yagi

Hideo Fujie

Yutaka Hashimoto

Kimio Suzuki

Sadao Kajiura

Yuka Yamaguchi

Kazuyuki Baba

Seiichi Tsuchiya

Masahiro Nakazato

Junji Tsunekawa

Sizunori Kaneko

Tamihiko Tanaka

Yoshihiko Butsusaka

Shizunori Kaneko

Mutsumi Naniwa

A driving means is placed below a photoconductor drum . The driving means includes first to fourth developing rollers A- D and toner storage chambers A- D. The developing means can be shifted by a developing-device moving motor to bring one of the developing rollers A- D which corresponds to one of liquid toners A- D to be developed in close to the photoconductor drum , followed by developing a latent image formed by an exposure. At this time, the distance between one of the developing rollers A- D and the photoconductor drum can be appropriately adjusted. In addition, before the development, meniscus of the liquid toner is quickly formed between the developing rollers A- D and the photoconductor drum by rotating the development rollers A- at the rotation speed higher than the rotation speed thereof at the development.

Printing method and printing apparatus, laser output control device and control device and control method for printing apparatus, and printing register control device for printing apparatus

This invention provides an electrophotographic photosensitive body including a photosensitive layer containing a chemical substance selected from a compound having a polysilazane skeleton, a compound having an Si&mdash;C,H,bond and one of an Si&mdash;N bond and an Si&mdash;C&mdash;N bond, a compound having an Si&mdash;C,F,bond and one of an Si&mdash;N bond and an Si&mdash;C&mdash;N bond, and a mixture of a compound having one of an Si&mdash;N bond and an Si&mdash;C&mdash;N bond and a compound having a C&mdash;F bond, an intermediate transfer medium including a surface layer containing the chemical substance, and an electrophotographic apparatus using the same.

Electrophotographic photosensitive body, intermediate transfer medium, and electrophotographic apparatus

A print monitoring apparatus for monitoring a print transported out of a printing unit comprises a defect position discrimination unit for discriminating a position of a defect on a print web of the print fed from the printing unit, a defect memory unit for storing defect position information given from the defect position discrimination unit and record information containing defect occurrence time, a number of successive occurrence pages, a roll paper name and a number of used pages, and a display unit for displaying the information stored in the defect memory unit. In another aspect, a print monitoring apparatus for monitoring a print transported out of a printing unit comprises a print defect detection unit for detecting defect on a print web of the print fed from the printing unit, the defect detection unit including a monitoring sensor for dividing a print surface of the print web into a plurality of pixels and converting information of pixels into electric signals representing density information of the respective pixels, a central processing unit for processing information data regarding the density information of the respective pixels from the print defect detection unit, and a defect content discrimination unit for discriminating defect content in accordance with information data from the central processing unit and preliminarily set reference for the discrimination.

Print monitoring apparatus with data processing

A printing machine such as a rotary offset press includes a printed material monitoring apparatus comprising sensor units for detecting light reflected from a number of unit pixel domains which are divided in a direction perpendicular to a direction in which a print surface of a printed material flows, optical fiber units for transmitting light reflected from the unit pixel domains to the sensor units and a signal processing unit for processing signals transmitted from the sensor units. The sensor units comprise detection sensors each being equipped with a plurality of light reception elements corresponding to the unit pixel domains respectively. The light reception elements are arranged in a plurality of rows of a fixed amount in a direction in which the print surface of the printed material flows to form groups of fixed amount of rows in which the light reception elements are arranged. The signal processing unit comprises analog multiplexer for multiplexing analog information detected by each of the light reception elements in the groups in which the rows of the light reception elements are arranged and digital multiplexer for further digitizing and multiplexing the multiplexed analog information transmitted from each of the groups of the light reception elements.

Apparatus for treating image information of printed material and

In a printing machine of the type wherein the quantity of ink is adjusted by varying a gap between an inking roller and an adjusting piece there are provided an actual position representing unit which stores a data corresponding to a gap width, a reference position setting unit for the adjusting piece at which the ink does not leak out, a comparator comparing outputs of the actual position representing unit and the reference position setting unit, an inking roller rotating state judging unit which produces a stop signal when the inking roller stops, and a gate circuit responsive to the stop signal and the output of the comparator for moving the adjusting piece. The control circuit is constructed to maintain the adjusting piece at the reference position when the inking roller is stopped.

Inking control apparatus for printing machines

In an inking device of a printing machine including an inking roller, there are provided a plurality of cam levers disposed side by side and in direct contact with each other along the longitudinal direction of the surface of the inking roller and supported pivotably by a stationary member of the inking device. The cam levers are driven by adjusting means so as to adjust the gap between the surface of the inking roller and the surface of the cam levers.

Printing machine inking device with plurality of cam levers

Growing community of inventors

Yokohama, Japan

Mitsuhiko Iida