Toppan Printing Co., Ltd.

Fuji Photo Film Company, Limited

Takashi Kuramoto

Takeo Onga

Teruo Suzuki

Tetsuji Uzuda

Takeshi Suwa

Takeo Kondo

Tetsuji Utsuda

Masao Mogi

Hisato Urase

Takashi Kominato

Hidenori Kaneda

Toru Sudo

Mitsuo Taga

Yasuhiro Seno

Masaru Koizumi

A dampening water controller for controlling the concentration of an etching solution in dampening water circulatively used in offset printing, includes an ion concentration measuring means capable of measuring the concentration of at least one kind of ion (object ions) selected from specific anions or cations contained only in an etching solution in dampening water. Information on the measured concentration of the ions in the dampening water is output. A dampening water temperature measuring device capable of measuring the temperature of the dampening water and outputting information on the measured temperatures is provided. Also, an ion concentration information correcting device is provided capable of correcting the information on the measured concentration of the ions in the dampening water, in accordance with the information on the measured temperature of the dampening water. The controller also includes an etching solution concentration adjusting device capable of adjusting the concentration of the etching solution in the dampening water, in accordance with the corrected information on the ion concentration.

Dampening water controller

A film pasting apparatus for pasting a color separation film on a base film used for a photomechanical process, comprises a lower table for placing a base film and having optical sensors, an upper table disposed above the lower table and having suction means and pasting means, a film tray for storing a color separation film on which a first registration mark having two line segments defining a predetermined angle and a second registration mark having two line segments parallel to the two line segments of the first registration mark are formed at positions corresponding to the sensors, film picking means for inserting the film tray into the apparatus main body below the upper table to draw the color separation film to the upper table by the suction means, film registering means for withdrawing the film tray from the apparatus to detect the registration marks of the color separation film drawn to the upper table by using the sensors, for registering the color separation film based on a result of detection of the registration marks, and for placing the color separation film on the base film placed on the lower table, and means for operating the pasting means to paste the color separation film on the base film.

Film pasting apparatus

A color original is picked up by a pickup head and B, G, and R image signals are obtained and supplied to a color process circuit including masking correction, under-color removal, and gradation correction circuits. Y, M, C, and K image signals output from the color process circuit are supplied to an exposure head to form a color separation plate. A print simulation unit having first and second frame memories is connected in parallel with the color process circuit. The B, G, and R signals are also written into the first frame memory. The signal read out from the first frame memory is supplied to the color process circuit and is color-corrected. The output from the color process circuit is written into the second frame memory and output to a color monitor. The second frame memory stores two frames, and can display both frames on the color monitor for comparison. The second frame memory has a data latch for latching a predetermined pixel signal, and a circuit for synthesizing the latched data in place of a predetermined pixel signal of the image signals. The second frame memory further has a comparator for detecting a pixel of the image signals having a level higher than a highlight set level, and a circuit for flashing the pixel having a level higher than the highlight set level.

Print simulation apparatus for adjusting the color separation conditions

A silhouette cutting apparatus includes a two-dimensional image scanner for reading a color separation film, a frame memory for storing a read image signal, a CRT display for displaying an image of any color separation film selectively output from the frame memory, a pointer for displaying a cross mark at one point in a desired figure in a displayed image, a latch for latching color or brightness of a displayed point of the cross mark, a comparator for comparing the data from the latch with color or brightness of all other points of image signals of any separation film selectively output from the frame memory and detecting silhouette image information of the desired figure in accordance with whether or not their difference exceeds a predetermined value, and a cutting plotter for cutting a peel-off film in accordance with the detected silhouette image information.

Silhouette cutting apparatus

Growing community of inventors

Tokyo, Japan

Takashi Kuramoto