JP3771787B2 - Printing device provided with printing plate recording device, image data creation device used in printing plate recording device, and printing plate recording device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing apparatus including a printing plate creating apparatus that creates a printing plate based on image data and performs printing using the created printing plate, and an image data creating apparatus and printing plate used in the printing plate creating apparatus. The present invention relates to a recording apparatus.
[0002]
[Prior art]
In recent years, a printing apparatus having a printing plate recording apparatus for recording an image on a printing plate on a plate cylinder to make a plate has been put into practical use, and is called a “digital printing machine” or the like. This digital printing machine is characterized in that complicated plate making operations are automated, so that even a relatively skillless operator can easily obtain printed matter at low cost.
[0003]
On the other hand, offset printing, particularly offset printing using a fountain solution, has a problem of ink emulsification. That is, dampening water is mixed in the ink and the ink is emulsified, and if this emulsification becomes excessive, proper printing cannot be performed. Such excessive emulsification occurs, for example, when the ink consumption is small. That is, if the ink on the ink roller is not consumed by printing, excessive dampening water will be mixed in, and since it will continue to be kneaded excessively, emulsification due to air mixing is likely to occur.
[0004]
Various methods are conceivable for preventing such emulsification. For example, the simplest method is to remove ink that has been emulsified excessively for each operation. However, this method is troublesome because the ink must be changed for each operation. Moreover, excessive emulsification during the work cannot be prevented.
[0005]
As other methods, it is conceivable to change the supply amount of dampening water for each region where the ink consumption is different, or to change the supply amount of ink and the amount of ink kneading. However, this method is difficult for an inexperienced operator, and the printing apparatus must also have a mechanism that can change the amount of dampening water for each region and a mechanism that changes the amount of ink kneading.
[0006]
[Problems to be solved by the invention]
As a technique that can be easily solved even by a skillless operator, it is conceivable that a minimum amount of ink is consumed in each printing area. That is, as described above, excessive emulsification occurs when the consumption of ink is small. Therefore, in order to prevent emulsification, a certain amount or more of ink may be consumed during printing.
[0007]
The present invention has been made to solve the above problems, and in a printing apparatus including a printing plate recording apparatus for recording a printing plate based on image data, a predetermined amount or more is required to prevent excessive emulsification of ink. It is an object of the present invention to provide a printing apparatus in which an ink consuming region is formed in a margin on a printing plate, and an image data creating apparatus and a printing plate recording apparatus used in the printing plate recording apparatus.
[0008]
[Means for Solving the Problems]
The invention described in claim 1 includes a printing plate recording device that records an image on a printing plate based on image data, and in a printing device that performs printing by supplying ink to a printing plate on which an image is recorded, According to an operator's instruction, designation means for designating one to four predetermined colors from among the print colors, and when printing an image of the color designated by the designation means on the printing plate, the print margin portion in the vertical direction A band area data preparation means for preparing band area data for recording the band area along the print width direction, and arranging the image and the band area on the printing plate based on the image data and the band area data. An image recording means for recording, and the size of the band area in the printing direction is converted to a printing density with respect to the entire printing area, and ink is consumed at a dot area ratio of 1.3 to 2.5%. If the amount of ink is too much, And an ink amount to be consumed by the minimum printing to prevent, width der previously set based on the quantity of ink Thus, the long side size of the band area is either the recording width of the actually recorded image or the recordable width of the target printing plate. It is characterized by that.
[0009]
According to a second aspect of the present invention, in the printing apparatus according to the first aspect, the designation of the color by the designation unit is one of four colors of YMCK, or one to three of three colors of YMC. It is characterized by specifying.
[0010]
According to a third aspect of the present invention, in the printing apparatus according to the first or second aspect, the band region is composed of a solid region or a flat mesh region for consuming a predetermined amount or more of ink.
[0011]
According to a fourth aspect of the present invention, in the printing device according to any one of the first to third aspects, the band area data preparation unit stores band area data relating to one or more band areas defined in advance. It is characterized by comprising area data recording means and band area data reading means for reading out corresponding band area data from the band area data recording means.
[0012]
According to a fifth aspect of the present invention, in the printing apparatus according to any one of the first to fourth aspects of the present invention, the printing apparatus further includes an image data synthesizing unit that synthesizes the image data and the band area data, and the image recording unit is synthesized. Recording is performed based on the obtained image data.
[0013]
According to a sixth aspect of the present invention, in the printing apparatus according to any one of the first to fifth aspects, the designation unit can set the print direction size of the band area in addition to the designation of the color.
[0014]
Claim 7 In the printing apparatus according to any one of claims 1 to 7, the belt region is provided on a paper bottom side of the printing paper.
[0015]
Claim 8 In the printing apparatus according to any one of claims 1 to 8, the band regions are arranged in parallel for each color without being overlapped.
[0016]
Claim 9 The invention described in Item 1 is characterized in that the printing apparatus according to any one of Items 1 to 9 is provided with display means capable of displaying the color of an image based on image data so that the operator can visually recognize the image.
[0017]
Claim 10 The invention described in 1 is an image data creation device used in a printing plate recording apparatus that records an image on a printing plate, and designates one to four predetermined colors from among printing colors according to an instruction from an operator. A band area data preparation means for preparing band area data for recording the band area along the print width direction in the print margin in the vertical direction with respect to the color designated by the designation means; and the image data An image synthesizing unit that synthesizes the band area data and a transmission unit that transmits the synthesized image data to the printing plate recording apparatus, and the size of the band area in the printing direction is printed on the entire printing area. The ink amount when the ink is consumed at a dot area ratio of 1.3 to 2.5% in terms of density is the ink amount that should be consumed by printing at a minimum to prevent excessive emulsification of the ink, To this ink amount Width der that has been set in advance Zui Thus, the long side size of the band area is either the recording width of the actually recorded image or the recordable width of the target printing plate. It is characterized by that.
[0018]
Claim 11 The invention described in claim 10 In the image data creation apparatus described in the item 1, the color designation by the designation means designates one of four colors of YMCK or one to three colors of three colors of YMC.
[0019]
Claim 12 The invention described in claim 10 Or 11 In the image data creation device described in (1), the band area is composed of a solid area or a flat mesh area for consuming a certain amount or more of ink.
[0020]
Claim 13 The invention described in claim 10 Or 12 In the image data creation device described in the above, the band area data preparation unit corresponds to a band area data recording unit that stores band area data relating to one or more band areas defined in advance, and the band area data recording unit. Band area data reading means for reading band area data.
[0021]
Claim 14 The invention described in claim 10 Or 13 In the image data creation device according to any one of the above, the designation unit can set the print direction size of the band area in addition to the designation of the color.
[0022]
Claim 15 The invention described in claim 10 Or 14 In the image data creation device according to any one of the above, the band region is provided on the bottom side of the printing paper.
[0023]
Claim 16 The invention described in claim 10 Or 15 In the image data creation device according to any one of the above, the band regions are arranged in parallel for each color without being overlapped.
[0024]
Claim 17 In the printing plate recording apparatus for recording an image on a printing plate based on image data, the invention described in the specification means for specifying one to four predetermined colors from among the printing colors according to an instruction from an operator; Band area data preparation means for preparing band area data for recording the band area along the printing width direction in the printing margin portion in the vertical direction when recording the image of the color designated by the designation means on the printing plate. And image composition means for synthesizing the image data and the band area data, and records the image and the band area side by side on the printing plate based on the synthesized image data, and the print direction of the band area In order to prevent excessive emulsification of the ink, the ink size when the ink is consumed with a dot area ratio of 1.3 to 2.5% in terms of printing density with respect to the entire printing area Inn to be consumed by minimum printing And the amount, the width der previously set based on the quantity of ink Thus, the long side size of the band area is either the recording width of the actually recorded image or the recordable width of the target printing plate. It is characterized by that.
[0025]
Claim 18 The invention described in claim 17 In the printing plate recording apparatus described above, the designation of the color by the designation means designates one of four colors of YMCK or one to three colors of three colors of YMC.
[0026]
Claim 19 The invention described in claim 17 Or 18 In the printing plate recording apparatus described in (1), the band region is composed of a solid region or a flat mesh region for consuming a predetermined amount or more of ink.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
First, the principle of the present invention will be described. FIG. 4 is an explanatory diagram illustrating an example of printing on the printing paper P. In this embodiment, on the printing paper P, an image IM and a band region S composed of a long solid region along the print width direction are printed. In the figure, the direction from the top to the bottom is the printing direction, and the lower side of the figure is the paper bottom side.
[0028]
For example, if the color of “flower” in this example is magenta, relatively magenta ink is consumed in the area A where “flower” is printed in the print width direction. On the other hand, in the areas B and C without “flowers”, magenta ink is hardly consumed unless there is an image of a color relating to magenta. In this case, the ink is continued to be kneaded without being consumed on the magenta ink rollers in the regions B and C, so that the emulsification of the ink proceeds excessively. In the region where excessive emulsification has occurred, the ink characteristics change. For example, there is a problem that an appropriate print quality cannot be obtained at the time of printing the next job.
[0029]
In the present invention, a magenta solid area is provided as the band area S in the above case. As a result, at least a certain amount of magenta ink is consumed by the band region S, so that excessive emulsification on the ink roller can be prevented.
[0030]
Next, a preferred embodiment of the band region S will be described. First, the belt area S is converted to a printing density as the minimum amount of ink to be consumed, and is about 1.3 to 2.5% in an A3 size horizontal printing apparatus, and the short side is about 5 to 10 mm. That which has the width | variety of this is preferable. If the short side size is too small, such as 5 mm or less, the effect of preventing emulsification is not obtained. Conversely, if it is 10 mm or more, ink and printing paper are wasted. The long side of the band region S may be set as appropriate by the operator judging the situation, but it is preferable to provide it over the maximum printable print width (paper width size). This is to prevent the area where the ink is emulsified in the next job.
[0031]
The band region S can be provided independently for each YMCK. This is because, for example, it may be possible to provide a band area for two or three colors depending on the image. Further, when a plurality of belt regions S are provided, it is preferable that the belt regions S are not overlapped on the printing paper as much as possible. That is, if two or more solids with 100% density are printed in layers, the problem of ink trapping and the color may become cloudy. However, this is not the case when there are no margins for providing a large number of band regions S. Normally, any one to three colors of YMC are designated as the band area S. However, when there is a character line drawing area or the like, a K-color band area may be set.
[0032]
The band area S may be set to a solid area so that ink can be efficiently consumed with a small width, or a flat mesh may be used. However, when the density of the flat mesh is low, it is necessary to set the short side width of the belt region large.
[0033]
About the position which arrange | positions the strip | belt area | region S, it is preferable to provide in the margin part on the paper bottom side. In other words, when provided on the upstream side of printing, the print density on the leading end side of the image IM may be affected by the printing of the band region S, and a ghost of the roller pitch tends to appear in the image IM.
[0034]
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing an example of a printing apparatus according to the present invention. FIG. 2 is a schematic diagram of image data in a printing system comprising the printing apparatus and an image data creating apparatus that creates image data in the preceding stage of the printing apparatus. It is a block diagram which shows a process structure.
[0035]
First, as shown in FIG. 1, the printing apparatus includes, as printing mechanisms, first and second plate cylinders 1 and 2 for holding a printing plate, and first and second plates for transferring an ink image from each plate cylinder. Second blanket cylinders 3, 4, an impression cylinder 5 that holds the printing paper and abuts both blanket cylinders 3, 4, and a feed cylinder 6 and a discharge cylinder 7 that supply or discharge the printing paper to and from the impression cylinder 5 A dampening water supply means 8 and an ink supply means 9 for supplying dampening water or ink to the printing plates on the first and second plate cylinders 1 and 2, and a stacked unprinted printing sheet. A paper supply unit 10 that sequentially supplies and a paper discharge unit 11 that sequentially stacks printed printing sheets are provided.
[0036]
On the other hand, this printing apparatus has, as a plate making mechanism, a printing plate supply unit 12 that supplies an unexposed printing plate to the first and second plate cylinders 1 and 2, and an image on the printing plate on the plate cylinder. An image recording unit 13 for recording, a developing unit 14 for developing a printing plate on which an image is recorded, and a printing plate discharge unit 15 for discharging a used printing plate are provided.
[0037]
In addition, the printing apparatus captures an image on the printed printing paper and measures the positional deviation amount, color density, and the like of the printed image, and printing that controls each part of the printing apparatus. And a control unit 17 (shown in FIG. 2). Details of each part will be described below.
[0038]
The first plate cylinder 1 is configured to be movable between a first printing position indicated by a solid line in FIG. 1 and an image recording position indicated by a two-dot chain line by a plate cylinder driving mechanism (not shown). Similarly, the second plate cylinder 2 is configured to be movable between a second printing position indicated by a solid line in FIG. 1 and an image recording position indicated by a two-dot chain line by a plate cylinder driving mechanism (not shown). That is, the first and second plate cylinders 1 and 2 are respectively arranged at the first or second printing position when the printing operation is executed, and are alternately arranged at the image recording position when the plate making operation is executed. The plate making process of the printing plate is performed on each plate cylinder.
[0039]
Each of the first plate cylinder 1 and the second plate cylinder 2 has a circumferential surface capable of holding printing plates for two colors, and the printing plates of each color are fixed at positions facing each other by 180 degrees on the circumferential surface. Two sets of holding means (not shown) are provided. In the above description, two printing plates having one printing area are mounted on the plate cylinder two by two. However, a single printing plate in which two printing areas are arranged may be mounted. . Further, for example, a predetermined polymer or the like may be applied and cured to make the surface of the plate cylinder itself a printing plate surface.
[0040]
The first blanket cylinder 3 is configured to rotate in contact with the first plate cylinder 1 at the first printing position, and the second printing is similarly applied to the second blanket cylinder 4. It is configured to rotate in contact with the second plate cylinder 2 at the position. The first and second blanket cylinders 3 and 4 have the same diameter as the first and second plate cylinders 1 and 2, and blankets capable of transferring ink images of two colors from the respective plate cylinders. It is mounted on the circumference.
[0041]
The impression cylinder 5 has a diameter half that of the first and second plate cylinders 1 and 2 and is configured to rotate in contact with both the first and second blanket cylinders 3 and 4. ing. The impression cylinder 5 is provided with a holding means (not shown) capable of holding one printing sheet having a size corresponding to the printing area on the printing plate. The gripping means can be opened and closed at a predetermined timing by an opening / closing mechanism (not shown) to hold the printing paper.
[0042]
The paper feed cylinder 6 and the paper discharge cylinder 7 have the same diameter as the impression cylinder 5, and are provided with a gripping means (not shown) similar to the gripping means provided on the impression cylinder 5. The gripping means for the paper feed cylinder 6 and the paper discharge cylinder 7 are arranged so as to be able to deliver printing paper in synchronization with the gripping means for the impression cylinder 5.
[0043]
The first and second plate cylinders 1 and 2 disposed at the first and second printing positions, the first and second blanket cylinders 3 and 4, the impression cylinder 5, the paper feed cylinder 6 and the discharge cylinder. The paper cylinder 7 is provided with a driving gear (not shown), which is substantially the same as the diameter of each cylinder, at each cylinder end, and the gears mesh with each other. Therefore, by driving this gear by a print driving motor (not shown), the cylinders can be driven to rotate synchronously.
[0044]
In the printing apparatus according to the present embodiment, the plate cylinders 1 and 2 and the blanket cylinders 3 and 4 have a circumferential length twice that of the impression cylinder 5, so that the plate cylinders 1 and 2 and the blanket cylinders 3 and 4 are 1 Each time it rotates, the impression cylinder rotates twice. Accordingly, when the impression cylinder 5 is rotated twice while holding the printing paper, a total of four colors can be printed from the first and second plate cylinders 1 and 2 for each of the two colors.
[0045]
The dampening water supply means 8 is arranged in two sets for each of the plate cylinders 1 and 2 at the first and second printing positions, and is selective to the two printing plates on each of the plate cylinders 1 and 2. Can be supplied with dampening water. The dampening water supply means 8 includes a water boat that stores dampening water and a dampening water roller group that pumps up the dampening water in the water boat and passes it to the printing plate surface. The roller that contacts the plate surface is configured to contact or separate from the plate cylinder surface by a cam mechanism (not shown). If the printing plate is a type of printing plate that does not require fountain solution, the fountain solution supply means 8 is not necessary.
[0046]
Two sets of ink supply means 9 are arranged for each of the plate cylinders 1 and 2 in the first and second printing positions, and are selectively different for the two printing plates on the plate cylinders 1 and 2. Color ink can be supplied. For example, in this embodiment, K (black) and M (magenta) ink supply means 8 are arranged for the first plate cylinder 1, and C for the second plate cylinder 2. Color (cyan) and Y color (yellow) ink supply means 8 are arranged.
[0047]
The ink supply means 9 comprises an ink fountain means for storing ink and an ink roller group for kneading the ink fed from the ink fountain means. Among the ink rollers, at least a roller that contacts the printing plate surface is a cam (not shown). The mechanism is configured to abut against or separate from the plate cylinder surface.
[0048]
It should be noted that some of the dampening water supply means 8 and the ink supply means 9 are configured so that they can be withdrawn from their movement paths as the first and second plate cylinders 1 and 2 move.
[0049]
The paper feeding unit 10 takes out printing paper one by one from a pile on which unused printing paper is stacked and passes it to the paper feeding cylinder 6. In this embodiment, the paper feeding unit 1 is turned on every two rotations of the paper feeding cylinder. Operates to supply twice-printed paper. The paper discharge unit 11 receives printed sheets from the paper discharge cylinder 7 and stacks them.
[0050]
Next, the plate making mechanism of this printing apparatus will be described. In this printing apparatus, when the plate making operation is executed, the first and second plate cylinders 1 and 2 are alternately moved to the image recording position. At this image recording position, a friction roller (not shown) is brought into direct or indirect contact with the plate cylinder so as to be driven to rotate.
[0051]
The printing plate supply unit 12 includes a cassette roll that stores a roll-shaped unexposed printing plate in a shaded state, a conveyance roller and a conveyance guide that conveys the drawn printing plate to the plate cylinders 1 and 2, and the printing plate in a sheet form Cutting means. In this embodiment, a silver salt sensitive material that exposes and records an image with a laser beam is used as the printing plate. However, for example, a thermal type printing plate that is melted or ablated by a laser beam may be used.
[0052]
The printing plate supply operation procedure is as follows. First, the front end of the printing plate drawn out from the cassette roll is sandwiched between gripping means (not shown) of the printing cylinders 1 and 2, and the printing cylinders 1 and 2 are rotated in this state to perform printing. The plate is wound on the plate cylinders 1 and 2, and then the printing plate is cut to a predetermined length and the rear end of the printing plate is held by the other gripping means.
[0053]
The image recording unit 13 records the image by exposing the printing plate by turning on / off the laser beam. The image recording unit 13 scans the laser beam emitted from the laser light source based on the image data in the axial direction of the plate cylinder by a deflecting unit such as a polygon mirror. The scanning by the deflecting unit and the rotation of the plate cylinder are performed. Thus, an image can be recorded on the printing plate. Alternatively, one or more laser irradiation means are arranged in a line along the axial direction of the plate cylinder, and the laser irradiation means is moved in parallel along the axial direction of the plate cylinder and scanned while rotating the plate cylinder. May be.
[0054]
The developing unit 14 develops the printing plate exposed by the image recording unit 13. In this embodiment, the developing unit 14 is configured to draw up the processing liquid stored in a processing tank (not shown) by a coating roller and apply the processing liquid to the printing plate to perform the developing process. And a lifting means (not shown) that moves to a position close to the plate cylinder. If an image recording method that does not require development processing is employed, the developing unit 14 may be omitted.
[0055]
The printing plate discharge unit 15 is a device that discharges a printing plate used for printing, a peeling unit that peels the printing plate from a plate cylinder at an image recording position, and a conveyance unit that conveys the peeled printing plate. And a discharge cassette for discharging the transported used printing plate.
[0056]
The imaging unit 16 reads an image or a color chart on the printing paper to be discharged. In the present embodiment, the imaging unit 16 includes an RGB line sensor provided along the width direction of the printing paper, and transports the printing paper. As a result, images on the printing paper can be taken line-sequentially. The image data read by the imaging unit 16 is subjected to image processing by the print control unit 17, and measurement data such as a color shift amount and a color density of the printed matter is calculated. Based on the measurement data, the mechanism of each part of the printing apparatus is controlled to adjust the registration and the ink supply amount.
[0057]
In this printing apparatus, the first and second plate cylinders 1 and 2 are moved to the image recording position, and the plate making operation is performed by supplying the printing plate and recording and developing the image. When the plate making operation is completed, the first and second plate cylinders 1 and 2 can be arranged at the first and second printing positions, respectively, to perform the printing operation.
[0058]
Next, a description will be given of the print control unit 17 shown in FIG. 2 and the image data creation device 20 that creates image data used for printing plate printing in the preceding stage of the printing device.
[0059]
The image data creation device 20 includes hardware of a computer system including display means such as a monitor, input means such as a keyboard and a mouse, storage means such as a hard disk, and communication means connected to a LAN. And software programmed to function as an image data creation device.
[0060]
When viewed functionally, as shown in FIG. 2, the image data creating apparatus 20 creates and edits image data representing an image to be printed, and an image data input / editing unit 21 that creates the binary data. RIP processing unit 22 for converting to image data D1, and band region data storage unit for storing image data corresponding to the band region S (hereinafter referred to as band region data to be distinguished from image data of an image to be printed) 23, a band area designating section 24 for designating the color of the band area S, a band area data reading section 25 for reading the band area data D2 of the designated color, the RIP-finished image data D1, and the reading A synthesizing unit 26 for synthesizing the combined band area data D2, and a transmitting unit 27 for transmitting the synthesized image data D3 to the printing apparatus.
[0061]
The image data input / editing unit 21 inputs image data created by another DTP device or the like, and edits or sets printing conditions as necessary. The RIP processing unit 22 performs RIP processing (raster-image-processing) for converting multi-valued image data into image data D1 on a binary bitmap.
[0062]
The band area data storage unit 23 is constituted by a storage means such as a hard disk, and stores a plurality of band area data as binary data in advance. For example, as the band area data, it is conceivable to store the band area S set for each color and other marks such as a color chart area in combination. Further, a plurality of the band regions S having different shapes and sizes may be stored as appropriate.
[0063]
The band area designation section is for the operator to manually set the color and size of the band area S to be added. In this embodiment, at least the color of the band region S may be set, and the size or the like may be a predetermined fixed value. When the operator determines the color of the belt region S, it is preferable to display the image data on a display means such as a monitor so that it can be referred to.
[0064]
The band area data reading unit 25 reads the band area data D2 related to the band area specified by the band area specifying unit 24 from the band area data storage unit 23 and sends it to the next synthesizing unit 26.
[0065]
The synthesizer 26 synthesizes the band area data D2 with the binary image data D1. Here, the image data D3 may be generated by adding the band area data D2 to the paper bottom side of the image data D1. As a result of the addition, there may be a case where the synthesized image data D3 has a size that does not fit on the printing plate. As processing in this case, when an error warning is given and the operator specifies the band area S again, the protruding band area S is not recorded on the printing plate, and a plurality of band areas S are overlapped. The case where it arrange | positions etc. can be considered.
[0066]
The transmission unit 27 transmits the synthesized image data D3 to the print control unit 17 of the printing apparatus. Regarding the transmission of the image data D3, the data may be transmitted in a lump or may be divided and transmitted as appropriate. Further, in response to an instruction from the print control unit 17, the corresponding image data D3 may be transmitted.
[0067]
The print control unit 17 of the printing apparatus receives the image data D3 transmitted from the transmission unit 27 and sends it to the image recording unit 13. The image recording unit 13 records a printing plate based on the image data D3.
[0068]
Next, the procedure for adding the band region S according to the present invention will be described with reference to the flowchart of FIG. First, in step S1, the operator selects a color for designating the band region S. For this selection, one to four colors are designated by any one of CMYK. Of course, if no band area is to be added, it may be left unspecified. In addition, it is preferable to display the color of the image related to the image data on a monitor or the like so that the operator can easily determine.
[0069]
At this time, if necessary, the input of the short side size of the band region S or the position where the band region S is added may be set. When a plurality of band regions S are designated, the arrangement order, presence / absence of overprinting, and the like may be set. In the case of a flat network, the density% may be set.
[0070]
In step S2, the band region data reading unit 25 reads the band region data stored in advance in the band region data storage unit 23 in accordance with the designated condition. In the next step S3, the image data of the image to be printed is synthesized. In step S4, the combined image data is sent to the printing apparatus, and the image is recorded on the printing plate.
[0071]
In the above embodiment, if an operator designates a color, band area data corresponding to the color can be easily added, thereby preventing ink emulsification.
[0072]
[Other embodiments]
(1) Although the printing apparatus and the image data creation apparatus are separately shown in the above embodiment, the printing apparatus may be integrated including both.
[0073]
(2) In the above-described embodiment, the band area S is added by the image data creation device 20 at the preceding stage of the printing apparatus. However, it may be added on the printing control unit 17 side of the printing apparatus. .
[0074]
(3) Although the printing apparatus using the fountain solution has been described in the above embodiment, since the emulsification is promoted also by the ink kneading that comes into contact with air, the present invention can also be applied to a printing apparatus that does not use the fountain solution.
[0075]
(4) The band region S only needs to be provided so as to consume ink substantially along the printing width direction. FIG. 5 is an explanatory diagram showing various band regions S. For example, FIG. 5A shows an example in which a plurality of divided regions are provided along the print width direction. FIG. 5B shows an example in which the divided areas are arranged in a staggered manner but substantially along the printing direction. FIG. 5C is an example in which the band region to be represented in a row is divided into a plurality of regions, and is substantially equivalent to the band region S provided along the print width direction. FIG. 5C shows an example in which the band region S is composed of characters, symbols, and the like. In addition to characters and symbols, flat nets or other line drawing solids may be added. Characters and symbols may record meaningful print information.
[0076]
(5) In the above embodiment, the band area data is stored in advance in the band area data storage unit 23 as binary data. However, after the image data input / editing unit 21 creates an image related to the band area S, the printed matter is printed. The RIP processing unit 22 may then perform RIP processing on the images constituting the image. However, the processing is easier if the band area data is stored in advance in the form of binary data and combined.
[0077]
【The invention's effect】
According to the present invention, if the operator designates a color, the corresponding band area data can be easily added, and thus emulsification of the ink can be easily prevented without performing complicated control.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a printing apparatus according to the present invention.
FIG. 2 is a block diagram relating to the printing apparatus and the image data creation apparatus.
FIG. 3 is a flowchart showing a procedure for adding a band region S;
FIG. 4 is an explanatory diagram of a band area on a printing paper.
FIG. 5 is an explanatory diagram showing another form of the band region S;
[Explanation of symbols]
1 First plate cylinder
2 Second plate cylinder
3 The first blanket cylinder
4 Second blanket cylinder
5 impression cylinder
6 Feeding cylinder
7 Discharge cylinder
9 Ink supply means
11 Paper discharge unit
13 Image recording unit
17 Print controller
20 Image data creation device
21 Image data input editor
22 RIP processing section
23 Band area data storage
24 Band area designation part
25 Band area data reading section
26 Synthesizer
27 Transmitter
D1 image data
D2 belt area data
D3 Composite image data
IM image
P Printing paper
S band area

Claims (19)

In a printing apparatus comprising a printing plate recording device for recording an image on a printing plate based on image data, and printing by supplying ink to the printing plate on which the image is recorded,
A designation means for designating one to four predetermined colors from among print colors according to an operator's instruction;
Band area data preparation for preparing band area data for recording the band area along the print width direction in the print margin in the vertical direction when recording the color image specified by the specifying means on the printing plate Means,
Based on the image data and the band area data, image recording means for recording the image and the band area side by side on the printing plate, and
The size of the band area in the printing direction is the ink amount when the ink is consumed at a dot area ratio of 1.3 to 2.5% in terms of printing density with respect to the entire printing area. and an ink amount to be consumed by the minimum printing to prevent emulsification, Ri width der previously set based on the quantity of ink,
The printing apparatus according to claim 1, wherein a long side size of the band region is substantially the same as either a recording width of an actually recorded image or a maximum recordable width .   2. The printing apparatus according to claim 1, wherein the designation by the designation means designates one of four colors of YMCK, or one to three of three colors of YMC.   The printing apparatus according to claim 1, wherein the belt region is a solid region or a flat mesh region for consuming a predetermined amount or more of ink. The belt area data preparation means includes
Band area data recording means for storing band area data relating to one or more predetermined band areas;
4. The printing apparatus according to claim 1, further comprising: band area data reading means for reading corresponding band area data from the band area data recording means. Image data synthesizing means for synthesizing the image data and the band area data;
5. The printing apparatus according to claim 1, wherein the image recording unit performs recording based on the synthesized image data.   The printing apparatus according to claim 1, wherein the designation unit can set a print direction size of the band area in addition to designation of the color. The band region, the printing apparatus according to any one of claims 1, characterized in that provided on the paper trailing edge of the printing sheet 6. The band region, the printing apparatus according to any one of claims 1 to 7, characterized in that it is arranged in parallel to each color without superimposed. As the operator visible printing apparatus according to any one of claims 1 to 8, further comprising a display means capable of displaying the hue of an image based on the image data. An image data creation device used in a printing plate recording device for recording an image on a printing plate,
A designation means for designating one to four predetermined colors from among print colors according to an operator's instruction;
Band area data preparation means for preparing band area data for recording the band area along the print width direction in the print margin portion in the vertical direction for the color specified by the specifying means;
Image combining means for combining the image data and the band area data;
Transmission means for transmitting the combined image data to the printing plate recording apparatus,
The size of the band area in the printing direction is the ink amount when the ink is consumed at a dot area ratio of 1.3 to 2.5% in terms of printing density with respect to the entire printing area. and an ink amount to be consumed by the minimum printing to prevent emulsification, Ri width der previously set based on the quantity of ink,
The long side size of the band area is either a recording width of an actually recorded image or a recordable width in a target printing plate . 11. The image data creating apparatus according to claim 10 , wherein the designation by the designation means designates one of four colors of YMCK or one to three of three colors of YMC. The band region, the image data generating apparatus according to claim 10 or 11, characterized in that it consists of solid areas or tint region to consume a certain amount or more of ink. The belt area data preparation means includes
Band area data recording means for storing band area data relating to one or more predetermined band areas;
Image data creating device according to any one of the band region data recording and swath data reading means for reading a corresponding swath data from the means, to claims 10, characterized in that it consists of 12. Said specifying means, in addition to the designation of the color, the image data generating apparatus according to any of claims 10 to 13, can set the print direction size of the band area. The band region, the image data generating apparatus according to any of claims 10, characterized in that provided on the paper trailing edge of the printing paper 14. 16. The image data creation device according to claim 10 , wherein the band regions are arranged in parallel for each color without being overlapped. In a printing plate recording apparatus for recording an image on a printing plate based on image data,
A designation means for designating one to four predetermined colors from among print colors according to an operator's instruction;
Band area data preparation for preparing band area data for recording the band area along the print width direction in the print margin in the vertical direction when recording the color image specified by the specifying means on the printing plate Means,
Image combining means for combining the image data and the belt area data,
Based on the synthesized image data, the image and the band area are recorded side by side on the printing plate,
The size of the band area in the printing direction is the ink amount when the ink is consumed at a dot area ratio of 1.3 to 2.5% in terms of printing density with respect to the entire printing area. and an ink amount to be consumed by the minimum printing to prevent emulsification, Ri width der previously set based on the quantity of ink,
The printing plate recording apparatus according to claim 1, wherein the long side size of the band region is either a recording width of an actually recorded image or a recordable width of a target printing plate. 18. The printing plate recording apparatus according to claim 17 , wherein the color designation by the designation means designates one of four colors of YMCK or one to three of three colors of YMC. The printing plate recording apparatus according to claim 17 or 18 , wherein the belt region is composed of a solid region or a flat mesh region for consuming a predetermined amount or more of ink.

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