JPS6134143B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides electronic color separation, correction, and
The present invention relates to a method for attaching a document to a direct scanner that outputs a document with shading.

In recent years, in color scanners, light is applied to a color document, the colors are separated through a filter, the light is converted into an electric current, the necessary corrections are made on the circuit, the light is converted back into light, and the film is exposed to produce each separated plate. Devices are becoming widespread that output a halftone screen made up of halftone dots with different areas depending on the photographic density using electronic means, such as by exposing light onto a lithium film through a contact screen or by replacing it with a digital signal. . In the case of general work, it does not matter where the document is placed and at any angle, and even if the halftone dot angle of each plate is not the regular angle, if the relative angle difference is maintained, moiré phenomenon will occur. There will be no impact due to

However, the plate output by this method can be obtained by, for example, printing a white line gravure screen on a sensitized carbon film, and then inserting a diffusion sheet between the plate and the carbon film and printing. When gravure plate making is carried out by transferring the carbon tissue produced and etching it to a gravure cylinder, if the screen angles of the plates do not match, moiré will occur due to the relationship with the gravure screen. The present invention was made to solve such problems,
This invention relates to a method for easily placing a document on the document cylinder of a color scanner at the correct angle according to trimming instructions, and is also applicable when the screen angle is limited due to striped patterns on the document.
Another object of the present invention is to facilitate positioning when laying out two or more color documents and scanning them at the same time, and by applying masking, the scanner can easily perform operations such as cutting out characters, overlaying characters, and trimming. There are some things that are easier to do at the top. The details of the present invention will be explained below with reference to the drawings.

First, a designation mount for layout is used as a manuscript, and a mount 1 is obtained from this designation mount for layout by a plate-making method described later so that the magnification is a reciprocal of the magnification rate of the scanner.
Generally, the designated mount for layout is written in the finished size, so in order to create a mount that matches the size of the original, it is necessary to reduce the size at the same rate as the magnification of the scanner. One method for this is to take a picture with a camera for plate making. In this case, it is convenient to use a positive-type photosensitive material or to obtain a positive image directly by reversal development. Alternatively, a negative image obtained using an ordinary lithium film may be desilvered, for example, with a solution consisting of EDTA iron chelate and hydrochloric acid to obtain a translucent brown image. The mount 1 obtained by the above method is stacked on a grid-shaped layout sheet 2 made up of precisely perpendicular lines as shown in Figure 1, the document 4 is placed in three layout designated areas, and punched in advance. Hole 1
A strip-shaped film 5 with the opening 2 opened is pasted onto the original 4.

At this time, the punch holes 12 of the strip film 5 are
As shown by document 4A in the figure, it is necessary to paste the documents at a position that is always attached to the longitudinal line of layout sheet 2 at a constant angle even if the angles are different depending on the layout. This relationship is illustrated in the example of two manuscripts 4 and 4A in FIG.

The length of the weft and weft lines on the layout sheet 2 is equal to the circumference and height of the document cylinder 6 of the scanner, and the weft and weft lines are arranged at intervals corresponding to scales attached to the rails 7 and bars 8, which will be described later. being drawn.

Another method is to use a table-type projection device or camera to set a reference line that is perpendicular to the X and Y directions on the document frame, set up the designated layout sheets according to the reference line, and then use a color scanner to plan the layout. The image is projected at a magnification that is the reciprocal of the magnification that is being used. The purpose can also be achieved by aligning the document with the designated trimming position of the projected image and pasting the film with band-shaped punched holes at a constant angle in alignment with the projected image of the reference line.

The document 4 with the band-shaped film 5 having punched holes 12 in this manner is pasted onto the document cylinder 6 of a color scanner using a device as shown in FIG.

Figure 2 shows the original cylinder 6 of the color scanner.
shows. This is a transparent glass or plastic cylinder in which light is emitted from the inside of the cylinder and transmitted through the document on the circumference of the cylinder to extract a signal. The document cylinder 6 that can be used in the present invention has metal or plastic band-shaped rails 7 attached to both ends or one end of the attachment side, and the rails 7 are notched with scales indicating dimensions and are shaped like a grid. Lay it out so that it corresponds to layout sheet 2. Furthermore, a cursor 9 is attached that can freely move along the rail 7 in the circumferential direction and can be easily attached to and detached from the rail. A cursor 10 that moves left and right along the bar 8 is attached, and a punch pin bar 11 corresponding to the punch hole 12 of the film strip 5 is attached to the cursor 10. Using such a device, attach the document 4 with the strip film 5 prepared in the manner described above to the punch pin bar 11, move it to an arbitrary position on the document cylinder 6 using the cursors 9 and 10, After fixing with a stopper (not shown), the original 4 is fixed to the original cylinder 6 with sellotape or the like, and the strip film 5 is peeled off. Preferably, the rail 7 is fixed to both ends of the document cylinder 6, the cursor 9 is attached to both ends, and the bar 8 is fixed. However, due to the structure of the scanner, it is necessary to leave one side free and insert the light source therein. When rotating at high speeds, there is a risk that deflection may occur due to the center of gravity. Therefore, in that case, as shown in FIG. 2, only a scale corresponding to the rail 7 at the other end is attached to one end, and one end of the bar 8 is left free and fixed in line with the scale on the document cylinder 6. Good. For the same reason, it is necessary that the cursor 9, bar 8, cursor 10, punch pin bar 11, etc. be detachably attached to the rail 7, and removed after alignment of the document 4 for scanning. The cursor 9 is structured so that it can be easily attached and fixed to the rail 7 when necessary. Further, if the bar 8 is rounded with the same curvature as the original cylinder 6, it will have good adhesion to the original cylinder 6 and will not scratch the original cylinder 6.

If the cursors 9 and 10 are transparent or semi-transparent and a standard line is inserted, it will be easier to align them with the scale, and it is especially convenient if the cursor 9 is placed with a standard line in alignment with the punch pin bar 11.

Since the present invention has the above-described configuration, even if several color originals are shaded using a direct scanner and then face-to-face and plate-made, all plates can be made at the same angle, and a gravure screen can also be used later. Good results can be obtained without the influence of moiré. Also, if you use this method, you can accurately determine the position of the document when disassembling it with a scanner, so you can use a mask cylinder or use the method described above to create a trimming mask that is the reciprocal of the scanner's magnification rate. By covering the original with a mask cylinder, it becomes relatively easy to directly obtain a plate with several color originals laid out using a color scanner, and operations such as cut-out characters can be easily performed using the mask cylinder. The required film original plate can be obtained directly in one process.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view for explaining the process of producing a document with a strip-shaped film according to the present invention, and FIG. 2 is a perspective view of a document cylinder used in the present invention. 1... mount, 2... layout sheet, 3...
...Layout instruction section, 4,4A...Manuscript, 5...
Strip film, 6... Original cylinder, 7... Rail, 8... Bar, 9, 10... Cursor, 11
...Punch pin bar.

Claims (1)

[Claims] 1 Place the mount obtained by reducing the layout instruction mount at the same magnification rate as the direct color scanner and place it on a layout sheet on which orthogonal lines are drawn in a grid pattern, and then give the layout instructions. After arranging a plurality of originals on the mount, a strip-shaped film with pre-punched holes is placed so that a line connecting the punched holes at each end of the plurality of originals and a line perpendicular to the grid pattern are aligned. A plurality of originals with strip-shaped films are obtained by removably pasting them at a certain angle, and lines orthogonal to the grid pattern of the layout sheet are placed on the circumferential edge of the original cylinder of the direct color scanner. a band-shaped rail with scales corresponding to the intervals of , a cursor that moves along the rail, and a bar with scales on the cursor that correspond to the intervals of lines perpendicular to the grid pattern of the layout sheet; After each cursor is attached with a punch pin bar that can move along the bar, first, fit the punch hole of the document with the film strip into the punch pin bar, and then insert the document with the film strip. Move the original along the cursor and/or the bar with reference to the respective scales to place the original at a position opposite to the layout instructions on the original cylinder or at a predetermined position unrelated to the layout instructions, and then place the film strip. The operation of removing the original and attaching only the original is repeated for the number of originals, so that the halftone dot angle after face-to-face alignment is the same for all the originals, either according to the layout instructions or regardless of the layout instructions. A method for attaching a document in a color scanner, which is characterized by direct pasting so that it can be set.