JP3101556B2 - Original film for color printing and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original film for color printing used for color offset printing of newsprint, for example, and a method for producing the same.

[0002]

BACKGROUND ART FIG. 5 (A), double-sided, such as those used in color offset printing, such as newspaper 4-color offset printing rotary press (hereinafter, referred to as double-sided four-color machine) indicates, the transfer path of the printing paper 1 A rubber blanket cylinder 2 and a plate cylinder 3 of four colors (for black, blue, red and yellow) are arranged in multiple stages on both sides thereof, and an image of the plate cylinder 3 is displayed on each stage in each stage. Transferred to a printing paper 1
Are printed simultaneously on both sides and printing of each color is sequentially performed.

On the other hand, single-sided four-color offset printing rotary press shown in FIG. 5 (B) (hereinafter, referred to as satellite machine) is
A rubber blanket cylinder 2 and a plate cylinder 3 of four colors are radially arranged with respect to a common impression cylinder 4, and only one side of the printing paper 1 moving on the peripheral surface of the impression cylinder 4 is moved from the plate cylinder 3 to the rubber blanket cylinder 2. Are sequentially printed.

[0004] The two-sided four-color printing machine is different from the one in which four colors are printed by a common impression cylinder like a satellite machine, because the printing paper 1 separates from the press unit for each color and the paper enters the next press unit. Due to elongation of the printing paper 1 or the like, color misregistration easily occurs between colors.

[0005] As a countermeasure, in order to fix the four colors of color shift, color control apparatus shown in FIG. 5 (A) is required. This color control device reads color control marks printed on both sides of the printing paper 1 by sensors 5 disposed opposite to both sides of the printing paper 1 carried out between the last rubber blanket cylinders 2 and is originally provided. By detecting an error with respect to the position to be adjusted, and adjusting the plate cylinder 3 of each color by a signal processed by the controller 6, the color shift between the colors is corrected.

[0006] For example, the plate cylinder 3 of each color as shown in FIG. 6 (A), a pair of plate cylinder body 3b provided with a gear 3a of the drive rotating each fitted to each other, these plate cylinder body A printing plate 7 is mounted on the peripheral surface of each color 3b for each color, and a color control mark transfer section 8 is provided at a fixed position different for each color in the printing plate 7 of each color. The color control marks from color control mark transfer portion 8 of the plate 7 of the respective colors are transferred to the rubber blanket cylinder 2, the printing sheet 1 of the newspaper or the like as shown in FIG. 6 (B)
The color control marks 9o and 9a for black, the color control marks 9b for blue,
Printed as a red color control mark 9c and a yellow color control mark 9d.

[0007] The printed color control marks are monitored by the sensor 5 to detect a shift from their original position as a color shift, and the gap between the gear 3a and the plate cylinder main body 3b in the axial or circumferential direction. By adjusting in the direction or adjusting the distance between the pair of plate cylinder main bodies 3b in the axial direction or the circumferential direction, correction is made so as to eliminate the deviation between the colors.

In order to provide the color control mark transfer section 8 at a fixed position different for each color on the printing plate 7 of each color, a color registration mark (register mark) provided integrally with an image or the like on a film material is formed. Attach color control mark generators with the required precision to the fixed positions that differ for each color of the film material of each color to complete the original film, and from this original film, the photosensitive surface of the plate that becomes the printing plate 7 of each color A color control mark transfer section 8 is printed on the upper side together with images and characters.

Since the accuracy of the color control mark generating section of the original film is proportional to the printing accuracy, a considerably high accuracy is required. In addition, the position where the color control mark is to be placed is outside the paper area and outside the output range of the computer that creates the color surface in the paper area, so we have to rely on manual work, so we have experience An operator affixes a color control mark generation unit separately created from the film material while manually positioning the color control mark generation unit at a specific fixed position of each color film material.

[0010]

For this reason, a skilled operation by a limited operator is required. Even so, the operation of attaching the color control mark generating portions to the film materials of each color is not easy and takes time. .

The present invention has been made in view of the above points, and provides a color printing original film capable of automatically providing a color control mark generating hole at an accurate position of a film material and a method of manufacturing the same. It is intended to do so.

[0012]

According to a first aspect of the present invention, there is provided a color printing original film for photoengraving a printing plate for color offset printing, wherein a plurality of fiducial marks provided on a film material are provided. A plurality of positioning holes for film positioning formed based on the plurality of reference marks, and a plurality of positioning holes are formed based on the reference marks together with the plurality of positioning holes, and each color of the printing plate of each color is provided. A color printing original film having a color control mark generating hole for printing a color control mark transfer portion at a different fixed position.

A plurality of positioning holes formed in the film material on the basis of the plurality of fiducial marks perform film positioning at the time of photolithography of a printing plate for color offset printing. The color control mark transfer holes are formed at the same time, and the color control mark transfer section is simultaneously printed on the printing plate of each color at a fixed position different for each color.

According to a second aspect of the present invention, there is provided the color printing original film according to the first aspect, wherein a color control mark generating hole is arranged in the film material between the two positioning holes.

The color control mark transfer portion is printed on the printing plate of each color by the color control mark generating holes arranged between the two positioning holes.

According to a third aspect of the present invention, there is provided a method of manufacturing a color printing original film for photolithography of a printing plate for color offset printing, comprising: reading a plurality of fiducial marks provided on a film material; A plurality of positioning holes for film positioning are formed based on the plurality of reference marks, and when the plurality of positioning holes are formed, printing corresponding to each color is performed based on the plurality of reference marks. This is a method for manufacturing a color printing original film having a configuration in which a color control mark generating hole for printing a color control mark transfer portion at a fixed position different for each color of a plate is formed.

Then, a plurality of reference marks provided on the film material are read, a plurality of positioning holes for film positioning are formed based on the plurality of reference marks, and the plurality of positioning holes are formed. At the time of setting, based on the plurality of fiducial marks, a color control mark generating hole for printing a color control mark transfer portion at a different fixed position for each color of the printing plate of each color, for color printing. Complete the manuscript film .

[0018] The invention described in 請 Motomeko 4, in the fabrication method of a color print original film according to claim 3 Symbol <br/> mounting, for black on all film material, for blue, and red-yellow A color printing document with holes for color control marks formed at the required positions by drilling holes for the color control marks at the required positions and closing the unnecessary holes for color control marks with film material of each color with light-shielding tape This is a method for producing a film.

After all the color control mark generating holes for black, blue, red, and yellow are once formed in all the film materials, for example, the unnecessary blue color material for the black film material is used. The color control mark generating holes for red and yellow are closed with light-shielding tape to form color control mark generating holes for black at required positions.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, will be explained in detail with the present invention with reference to an exemplary type condition shown in FIGS.

FIG. 1 shows a photoengraving plate for offset printing using four colors of black (black), blue (cyan), red (magenta), and yellow (yellow) used in color printing of newspaper or the like. Indicates a color printing original film common to each color, and outside the frame of the paper area 12 in which images or characters are developed by the negative or positive film material 11 and at a position common to each color film material, Two + -shaped reference marks 13 called are provided. The images, characters, reference marks 13 and the like on the film material 11 can be developed and fixed from signals transmitted by facsimile.

On the basis of the reference mark 13 of the film material 11, a round positioning hole 14 for film positioning and an oval positioning hole 15 are formed at a common position for all film materials of each color. These positioning holes 14, 15 are
This is for setting the original film of each color at a fixed position of the plate making machine at the time of photolithography. In photolithography, a negative or positive film material 11 is positioned and exposed on the photosensitive film surface of the plate, and images and characters are printed to produce a printing plate.

Each of the positioning holes 14 and 15 is automatically formed by a boring device (not shown) called a pin axim automatic punch. In this pin-axim auto-punch, the film material 11 of each color was fixed in a developed state on the table, the reference mark 13 of each color film material 11 was automatically read by a sensor, and the position was determined based on the reference mark 13. The positioning holes 14 and 15 are automatically drilled with high precision at a fixed position common to each color film material by a drilling tool.

By providing the punching tool for the positioning hole and another punching block for the hole in this pin-axim auto punch, when the reference mark 13 of each film material 11 is automatically read by the sensor, At the same time or before and after punching the positioning holes 14 and 15 on the film material 11 based on the reference mark 13, color control mark generating holes 16 o, 16 a, 16 b, 16 c and 16 d for each color are formed by the punch block. Like the positioning holes 14 and 15, it can be drilled with high accuracy within ± 0.01 mm.

The color control mark generating hole 16
o, 16a, 16b, 16c, 16d are arranged in the film material 11 in the middle of the two positioning holes 14, 15, so that the punch block can be mounted in the conventional space of the pin-axim auto punch. Therefore, the size of the pin-axim / auto-punch can be prevented.

The color control mark generating hole 16
o, 16a, 16b, 16c and 16d are small holes for printing the color control mark transfer portions at different positions for the four color printing plates of black, blue, red and yellow. Although one color control mark generation hole may be formed in one original film, in the present embodiment, all color control mark generation holes 16o, 16a, and 16b are formed in all color original films. , 16c and 16d are all drilled.

FIG. 2A is an enlarged view of the color control mark generating holes 16o, 16a, 16b, 16c, 16d. Each color is provided at a certain distance from the center of the round positioning hole 14. Control mark header (reference)
A color control mark generating hole (black) 16o is formed, and based on the hole 16o, a color control mark generating hole 16a for black, a color control mark generating hole 16b for blue, a color control mark generating hole 16c for red and a yellow color control mark are formed. Color control mark generation hole 16d
Drill all of once.

As shown in FIG. 2B, each color control mark generating hole 16o, 16a, 16b, 16c, 16d is
Each side is a small square hole having a size of about 1 mm, and each inner corner is formed in an arc shape.

As shown in FIG. 3, for black, for blue,
All film materials 11a, 11b, 11 for red and yellow
Once color control mark generating holes 16o, 16a, 16b, 16c, 16d for all four colors are formed in c and 11d, unnecessary color control marks are generated in film material 11a, 11b, 11c, 11d for each color. The holes are closed with light-shielding tapes 17a, 17b, 17c, 17d such as a red adhesive tape to form color control mark generating holes for each color at fixed positions determined for each color.

For example, as shown in FIG. 3A, in the black film material 11a, unnecessary color control mark generating holes 16b, 16c, 16d for blue, red, and yellow are used.
Is closed with a light-shielding tape 17a to form black color control mark generating holes 16o and 16a at required positions.

Similarly, as shown in FIG. 3B, the other holes are closed with the light-shielding tape 17b except for the color control mark generating holes 16b of the blue film material 11b.
As shown in FIG. 3C, the other holes are closed with the light-shielding tape 17c except for the color control mark generating hole 16c of the red film material 11c, and as shown in FIG. The other holes are closed except the color control mark generating hole 16d of the material 11d.

At the time of photolithography, the positioning holes 1 formed in the film material 11 based on the fiducial marks 13 are formed.
According to 4 and 15, this film material 11 is positioned on the photosensitive film surface of the plate to be a printing plate for color offset printing, and is exposed to light, so that the image of the film and the like can be printed on the photosensitive film surface of the plate. , Color control mark generating holes 16o, 16a, 16b, 1
6c and 16d, as shown in FIG.
The color control mark transfer portions 8o, 8a, 8b, 8c, 8d are simultaneously printed at different fixed positions for the colors a, 7b, 7c, 7d.

For example, the film material 11 for black shown in FIG.
By the color control mark generation holes 16o and 16a of a,
As shown in FIG. 4 (A), black color control mark transfer portions 8o and 8a are formed on a black printing plate 7a, and a color control mark generating hole 16b of a blue film material 11b shown in FIG. 3 (B). Thus, as shown in FIG. 4B, a blue color control mark transfer portion 8b is formed on the blue printing plate 7b, and the color control mark generating hole 16c of the red film material 11c shown in FIG. Thus, as shown in FIG. 4C, a red color control mark transfer portion 8c is formed on the red printing plate 7c, and the color control mark generating hole 16d of the yellow film material 11d of FIG. 3D is formed. Thereby, as shown in FIG. 4D, a yellow color control mark transfer portion 8d is formed on the yellow printing plate 7d.

As described above, the reference mark 13 common to each of the film materials 11a, 11b, 11c, and 11d on which images and the like have been developed for each color is read, and based on the reference mark 13, the reference mark 13 of the paper area 12 is read. Two positioning holes 14, 15 for film positioning are drilled outside, and at the same time or before and after,
Based on the fiducial mark 13 at the common position of all film materials 11a to 11d, color control mark generating holes 16o, 1 for four colors
6a, 16b, 16c, 16d are drilled, and light-shielding tapes 17a, 17b, 17 are inserted into unnecessary color control mark generating holes.
By pasting c and 17d, the original film for color printing is completed.

The image of the original film of each color is printed on each plate corresponding to each color by photolithography, and at the same time, the color control mark generating holes 16o, 16a,
The color control mark transfer units 8o, 8a, and 8d are located at different fixed positions for each color of the plate corresponding to each color by 16b, 16c, and 16d.
The printing plates 7a, 7b, 7c, 7d for color offset printing are completed by printing the printing plates 8b, 8c, 8d.

The printing plates 7a, 7b, 7c, 7d of these colors absorb ink corresponding to the white images, characters, and color control mark generating holes 16o, 16a, 16b, 16c, 16d of the original film. Since a portion is formed, when each color ink is applied to these printing plates, the printing plate 7 of each color is applied.
a, 7b, 7c, 7d color control mark transfer section 8
o, 8a, 8b, 8c, each color of ink is attached to the ink absorbent portion comprising 8d, once transferred to the blanket cylinder 2 from the plate cylinder 3 for each color printing plate loading as shown in FIG. 5 (A) the blanket cylinder 2 from the paper 1, such as newspaper respective color images and color control marks 9o shown in FIG. 6 (B), 9a, 9b , 9c, 9d and the like are printed.

[0037] to the end, embodiments claim shown in FIG. 3
4 and the film materials 11a, 11b,
All color control mark holes 16 on 11c and 11d
Drill o, 16a, 16b, 16c, 16d, and light-shielding tapes 17a, 17b,
17c and 17d are attached to form one or two necessary color control mark generating holes. However, the inventions described in claims 1 to 3 are not limited to the above method. , Film material 11a, 11b, 11c, 1 of each color
At 1d, one or two color control mark generating holes may be formed at specific positions depending on the color. This can be easily realized by pin-axim auto-punch.

[0038]

According to the first aspect of the present invention, a color control for printing a color control mark transfer portion on a printing plate of each color with a plurality of positioning holes in a film material based on a plurality of fiducial marks. Since the hole where the mark is generated is drilled, it is possible to easily set the color control mark generating hole at the exact position of the film material by the device that drills the positioning hole. The work of attaching the color control mark generation section over time can be eliminated.

According to the second aspect of the present invention, the color control mark generating holes are arranged in the space of the device for forming the positioning holes by arranging the color control mark generating holes between the two positioning holes. It is possible to prevent the size of the positioning hole drilling device from being increased.

According to the third aspect of the present invention, a plurality of reference marks provided on the film material are read, and a plurality of positioning holes for film positioning are formed based on the plurality of reference marks. At the time of drilling the plurality of positioning holes, based on the plurality of reference marks, a color control mark generating hole for printing a color control mark transfer portion at a fixed position different for each color on the printing plate of each color. Since the original film for color printing is completed by piercing, it is possible to automatically provide a color control mark generating hole at an accurate position on the film material. It is possible to eliminate the need for the operation of attaching the color control mark generating section to the film material of each color by taking time .

[0041] According to the invention 請 Motomeko 4, wherein all of the color control marks generation holes of colors required for all film material once drilled, the color control marks generated holes for unnecessary coloration later By closing with a light-shielding tape, a color control mark generating hole for a necessary color is formed, so that it is possible to further enhance the ease of drilling and the positional accuracy of the color control mark generating hole.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an original film for color printing of the present invention.

FIG. 2A is an enlarged plan view of a main part of the film, and FIG. 2B is an enlarged view of a color control mark generating hole.

3A is a black film material, FIG. 3B is a blue film material, FIG. 3C is a red film material, and FIG. 3D is a yellow film material. FIG. 4 is a plan view showing a method of closing the hologram with a light shielding tape.

FIG. 4 is a plan view showing a color control mark transfer portion printed on a printing plate of each color by the film.

FIG. 5A shows a two-sided four-color offset printing press, and FIG. 5B shows a one-sided four-color offset printing press.

FIG. 6A is an explanatory view showing a plate cylinder of the rotary press and a developed state of a printing plate mounted on the plate cylinder, and FIG. 6B is a plan view showing a color control mark printed on newsprint. It is.

[Explanation of symbols]

7a, 7b, 7c, 7d Printing plate 8o, 8a, 8b, 8c, 8d Color control mark transfer section 11a, 11b, 11c, 11d Film material 13 Reference mark 14, 15 Positioning hole 16o, 16a, 16b, 16c, 16d Color Control mark generating holes 17a, 17b, 17c, 17d Light shielding tape

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03F 1/00-1/16

Claims (4)

(57) [Claims] 1. A color printing original film for photoengraving a printing plate for color offset printing, comprising: a plurality of reference marks provided on a film material; and a plurality of reference marks formed on the basis of the plurality of reference marks. A plurality of positioning holes for film positioning, and a plurality of these positioning holes are drilled based on the fiducial mark to print the color control mark transfer portion at a fixed position different for each color of the printing plate of each color. An original film for color printing, comprising: a color control mark generating hole. 2. The original film for color printing according to claim 1, wherein a color control mark generating hole is arranged in the film material at an intermediate position between the two positioning holes. 3. A method of producing a color printing original film for photolithography of a printing plate for color offset printing, comprising: reading a plurality of fiducial marks provided on a film material; Then, a plurality of positioning holes for film positioning are formed, and when the plurality of positioning holes are formed, a fixed position different for each color of the printing plate corresponding to each color based on the plurality of reference marks. A method for producing a color printing original film, characterized in that a color control mark generating hole for printing a color control mark transfer section is formed in the original film. 4. A color control mark generating hole for black, blue, red, and yellow is formed in all film materials, and unnecessary color control mark generating holes are formed with a light-shielding tape for each color film material. By closing,
Production process according to claim 3 Symbol placement color printing original film, characterized in that the formation of the color control marks generated holes to the required position.