Kabushiki Kaisha Kaneda Kikai Seisakusho

Kabushikigaisha Tokyo Kikai Seisakusho

Kabushiki Kaisha Tokyo Kikai Seisakusho

Tokyo Kikai Seisakusho, Ltd.

Kabushiki Kaisha Tokyo Seisakusho

Kabushiki Kaisha Kikai Seisakusho

Yuichi Okamura

Takemi Watanabe

Junichi Hosokawa

Komei Kawahara

Noriyuki Shiba

Hideo Ohta

Masayoshi Sato

Yuko Tomita

Tomoshi Kawada

Kohmei Kawahara

Akitoshi Komatsu

Chikao Ueda

A method of making printing plates for color newspaper printing almost free from causing color dislocation. The present invention includes an exposure step,of directly drawing a desired image on a plate material E from a plate feeding step,by laser beam according to image drawing signals from a computer, a development and fixing step,of treating the exposed surface to produce a printing plate,with the desired image, and a bending and boring step,of forming bent edge stoppers,at the two edges of the printing plate,for mounting the plate,on the plate cylinder,and at least one positioning hole,for positioning the plate,on the plate cylinder,. In the exposure step,, pilot marks P in a desired shape are drawn near the two edges of the plate material E at the same time that a desired image T is drawn on the image drawing area Q of the plate material E according to image drawing signals from the computer. The bending and boring step,involves providing standard marks S having the same shape and the same positional relation as the pilot marks P above the printing plate loading table,of the bending and boring unit, automatically checking the superimposition between the pilot marks P on the printing plate,placed on the printing plate loading table,and the standard marks S by detection signals from an image sensor camera,provided above each standard mark S so that when the superimposition dislocation between the standard marks P on the printing plate,and the standard marks S is found to be under a set value level, at least one positioning hole,as well as bent edge stoppers,are formed at the two edges of the printing plate

Method of making newspaper printing plates

A recorded image frame is distorted on the printing plate when image information or image data from a computer is recorded in the form of band strips, with a plurality of image elements dotted on each widthwise dotted line of the band, on a printing plate wound over a drum. The present invention permits an undistorted recording on the printing plate by an arrangement which includes a printing plate wound around a drum in the form of a right circular cylinder, an exposing assembly to record image information in the form of a band strip on the printing plate by means of light beam, a moving mechanism to move the exposing assembly in relation to the drum in the direction of the drum axis--by one band width per revolution of the drum--and a circuit to generate an incline distortion offsetting signal in a sawtoothed pattern having the cycle synchronized with that of the rotation of the drum with the initial writing position on the band as starting point. Under this arrangement, this incline distortion offsetting signal is applied to the exposing assembly to gradually move the light beam in the direction opposite to the moving direction of moving mechanism--by one band width per revolution of the drum. This process is repeated until the whole printing image is recorded.

Apparatus for exposure of printing plates using signals to offset image

A recorded image is distorted on a printing plate when an image information for a computer is recorded in the form of a band with a band width of a plurality of image elements on a printing plate wound around a drum. This invention provides an undistorted recording on the printing plate, made possible by an arrangement that has a printing plate wound around a drum in the form of a right circular cylinder, an exposure unit that uses a light beam to record image information in the form of a band on the printing plate, a moving mechanism to move the exposure unit by one band width in the direction of the drum axis in relation to the drum while the drum makes a revolution, an image treating apparatus with the image information stored in the form of a right quadrangle, and an image modulator to rearrange and slant each band of image information readout from said image treatment apparatus by one band width in the opposite direction to the movement of said moving mechanism.

Apparatus for exposure of printing plates using image modification

A system for making printing plates for newspaper, which can make, with great efficiency, replacement printing plates to be used when a printing face of the printing plate mounted on the plate cylinder of the rotary press is to be changed in part. The plate-making system is built by linearly arranging in series a plate feeder 2, an exposure unit 3, and a developer 5 so that the exposure unit 3 may directly form images on the printing faces of a plate material 12 in accordance with image drawing signals from a computer to make a printing plate P large enough for at least several pages. On the downstream side of the developer 5 are provided: a borer 7 for making positioning notches 12a and positioning holes 12b in the plate material 12 (for several pages of newspaper) as discharged from the developer 5; a cutter 12 for cutting the plate material 12 (for several pages of newspaper) from the borer 7 into several plate materials 12', each the size one page of newspaper; a first bender for forming bends 12c, for mounting the printing plate on the rotary press, in the plate material 12 (for several pages of newspaper) which plate material has not been cut by the cutter 8 after being bored by the borer 7; and a second bender for forming bends 12c, for mounting the printing plate on the rotary press, in several one page size plate materials 12' which have been obtained by cutting the plate material 12 by the cutter 8 after boring by the borer 7.

System for making printing plates for newspaper printing

A photoengraving machine of this invention increases photoengraving speed without unduly increasing size or manufacturing costs of a CPT-type photoengraving machine by decreasing waiting time for form plates transferred from a plate feed section. The machine comprises a plate feed section, an exposure section, a plate discharge section, and a development section to make a drawing on a form plate at the exposure section in accordance with a signal output from a computer. The form-plate feed section has a stocker case for storing form plates and a transfer unit set above the stocker case to be vertically movable for transferring form plates along a guide rail. The exposure section has at least two exposure barrels arranged at intervals, a laser-beam scanning head, a first table on a side of each exposure barrel toward the form-plate feed section, and a second table on a development-section side of each exposure barrels. The plate discharge section has a discharge table on an exposure-section side of the development section.

Machine for making printing plates for newspaper printing

An exposure drum (11) of a CTP newspaper plate-making apparatus has a width (W) which is slightly greater than a vertical measurement (L.sub.1) of one page of a newspaper, a circumference (L) which is slightly greater than a vertical measurement (L.sub.2) of two pages of newspaper, first and second plate-material engaging pins (13a, 13b) spaced from each other on the cylindrical surface of the exposure drum a distance (L.sub.5) which is equal to 1/2 of the circumference (L), second plate-material suction apertures (14a) in the cylindrical surface spaced from the first plate-material engaging pins a distance (L.sub.7) which is slightly smaller than a horizontal measurement (L.sub.4) of two pages of newspaper, first plate-material suction apertures (14a) in the cylindrical surface spaced from the first plate-material engaging pins a distance (L.sub.6) which is slightly smaller than the vertical measurement (L.sub.1) of one page of newspaper, and third plate-material suction apertures (14c) in the cylindrical surface spaced from the first plate-material engaging pins a distance (L.sub.8) which is slightly smaller than the vertical measurement (L.sub.2) of two pages of newspaper.

Exposure drum for a newspaper print-plate making apparatus

A news-printing photoengraving machine of this invention increases photoengraving speed without unduly increasing size or manufacturing costs of a CPT-type photoengraving machine by decreasing waiting time for form plates transferred from a plate feed section. The machine comprises a plate feed section, an exposure section, a plate discharge section, and a development section to make a drawing on a form plate at the exposure section in accordance with a signal output from a computer. The form-plate feed section has a stocker case for storing form plates and a transfer unit set above the stocker case to be vertically movable for transferring form plates along a guide rail. The exposure section has at least two exposure barrels arranged at intervals, a laser-beam scanning head, a first table on a side of each exposure barrel toward the form-plate feed section, and a second table on a development-section side of each exposure barrels. The plate discharge section has a discharge table on an exposure- section side of the development section.

Machine for simultaneously making two printing plates for newspaper

By increasing the printing-plate-making speed in a laser-direct-drawing-from-computer type plate making system, the plate size can be increased without large-scale expansion of the plate making facilities, and the operation time of the rotary press is thereby improved to increase the number of newspaper prints. The invention provides a printing-plate-making method for newspaper printing designed to enable figure-drawing corresponding to drawing image signals from an electronic computer by laser beam. A plurality of laser scanning heads are provided in an electrostatic charging and figure-drawing image signals from the electronic computer to draw similar or different figures on a plurality of plates in parallel. The plates thus drawn are then subjected to a developing and fixing section, an elution section, post-treatment section, etc.

Method of making a printing plate for newspaper printing

A dampening system for a printing apparatus includes a print plate, a printing cylinder contacting the print plate and adapted to supply water to the print plate, a feed device for feeding water to the printing cylinder, and a dampening roller adapted to transfer water from the feed means to the printing cylinder. The dampening roller comprises a roller having a dampening layer composed of a substrate through which is dispersed a plurality of minute hollow bodies. A plurality of the hollow bodies open towards the circumferential surface to form cells for transferring the water from the feed means to the printing cylinder. At least one of the size and the concentration of the hollow bodies dispersed within the substrate is selected depending on the amount of dampening water to be fed to the print plate.

Dampening roller and method for producing the same and dampening systems

A color printing apparatus printing for both sides of printing paper comprises a plurality of printing sections which are arranged at a regular interval in a piled configuration. Each one of the printing section includes a pair of blanket cylinders facing each other which can be moved between their contacting positions and their isolating positions. Every blanket cylinder is connected to a plate cylinder which is connected to an inking unit, or an inking unit and a dampening unit. Each of the plate cylinders is further provided with a fine adjusting means for shifting the plate cylinder along its axis with respect to the blanket cylinder. The shifting operation of the fine adjusting means can easily minimize the printing shears caused by moisture without stopping the printing apparatus.

Color printing apparatus for both sides of printing paper

There is provided an inking unit comprising an ink circulating assembly and means for moving a platform on which said ink circulating assembly is provided. The ink circulating assembly includes the ink fountain provided in an ink reservoir, ink outlet means for introducing the ink into the ink fountain, the ink reservoir having an open top and designed to surround the ink fountain from beneath the ink fountain, a screw conveyor arranged along the longitudinal direction within the ink reservoir for conveying the ink mixing the excess dampening water therewith and diffusing the excess dampening water therinto, and a pipe connecting between the ink reservoir and the ink outlet means. The means for moving the platform includes a lifter for vertically moving the platform, and casters for horizontally moving the platform. Thus, the means for moving the platform can be used both as adjustment of a position of the ink fountain in relation to the roller and as removal of the ink circulating assembly to repair and/or to change one to another.

Inking unit

Disclosed is an ink supplying apparatus which can drive and rotate a fountain roller at an arbitrary speed independently of the peripheral speed of a roller adjacent to the fountain roller when an ink fountain is fitted to a rotary press, which does not require large-scale maintenance and inspection, which is free from any danger, and which is equipped with an ink fountain having a fountain roller capable of being fitted to and removed from a suitable position corresponding to a maximum printing width.

Ink supplying apparatus in rotary press

A color printing apparatus printing for both sides of a web of printing paper comprises a plurality of printing sections which are arranged at a regular interval in a piled configuration. Each one of the printing section includes a pair of blanket cylinders facing each other which can be moved between their contacting positions and their isolating position. Every blanket cylinder is connected to a plate cylinder which is connected to an inking unit, or an inking unit and a dampening unit. Each of the plate cylinders is further provided with a fine adjusting means for shifting the plate cylinder along its axis with respect to the blanket cylinder. The shifting operation of the fine adjusting means can easily minimize the printing shears caused by moisture without stopping the printing apparatus.

Herein disclosed is a web paper cutting position adjusting system which comprises: marking means including a control unit for generating a predetermined phase detection signal by detecting a predetermined rotational phase of a platen, and a marking unit for marking a web paper in response to the predetermined phase detection signal; web paper cutting means disposed a predetermined distance downstream of the marking means for cutting the web paper; mark detecting means interposed between the marking means and the web paper cutting means for detecting the mark to transmit a mark detection signal; cutting phase signal transmitting means associated with the operation of the web paper cutting means for transmitting a cutting phase signal; and web paper threading path changing means including an arithmetic unit having an operation signal transmitting unit made receptive of the mark detection signal and the cutting phase signal for transmiting a web paper threading path length changing signal, if the transmission timing of the mark detection signal is outside of a predetermined range for allowance of the cutting phase signal, and a web paper threading path length changing unit disposed upstream of the mark detecting means for changing the threading path length of the web paper in response to the web paper threading path length changing signal.

Web paper cutting position adjusting system

The present invention has as an object to provide an inking device which prevents the generation of vibration in rollers and is capable of supplying the amount of ink uniformly all the time to the surface of printing plate in the direction of its width. The inking device of the invention is constructed such that the distance between the bottom of the ink pan and the surface of the ink fountain roller, the distance between the surface of the ink fountain roller and the surface of the ink transfer roller and the surface of the roller next to it in the downstream direction are made smaller as the distance proceeds downstream. The ink is transferred from the upstream side to the downstream side, and during this ink transfer, the ink distribution is regulated uniformly in the direction of roller width by means of a doctor blade, etc. Further, the circumferential surface speeds of the rollers are variable, and the vibration of the inking device is prevented by matching the circumferential surface speed of the ink transfer roller to the circumferential surface speeds of the rotating rollers on the downstream side.

Growing community of inventors

Tokyo, Japan

Yuichi Okamura