JP4826012B2 - Automatic conversion data generator for ink adjustment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of presetting the opening of an ink key in a printing press. In particular, the present invention relates to an apparatus that automatically generates and updates conversion data for obtaining opening degree data from printing plate data based on actual opening degree data.
[0002]
[Prior art]
A printing machine such as an offset printing machine has an ink key for adjusting the distribution of the ink supply amount in a direction (width direction; left-right direction) perpendicular to the printing direction (web transport direction; top-to-bottom direction). By adjusting the distribution of the ink supply amount, it is possible to increase the ink supply amount in a portion where the pattern area in printing is large and to decrease it in a small portion, so that proper printing can be performed.
[0003]
Conventionally, the printing plate is optically scanned, and the distribution of the pattern area ratio, that is, the pattern area ratio corresponding to each ink key is measured from the reflectance. In recent years, the pattern area ratio corresponding to each ink key is derived from the printing plate data corresponding to the pattern of the printing plate, for example, the printing plate data in the direct printing plate. And the opening degree of the ink key in a printing machine is preset based on the pattern area ratio. After starting printing, the operator adjusts the preset ink key while confirming the print quality. Thereby, an appropriate printed matter can be obtained in a short time.
[0004]
In order to determine the opening degree of the ink key based on the pattern area ratio, it is necessary to refer to conversion data (function, table, etc.) for determining the opening degree of the ink key from the pattern area ratio. The converted data differs depending on the individual printing press. The main reason is that the relationship between the ink key opening and the ink supply amount varies depending on the individual printing press due to the difference in the structure and adjustment of the ink device in each printing press.
[0005]
[Problems to be solved by the invention]
Therefore, in order to obtain conversion data in each printing press, ink key opening data and printing plate data (or printing press data (or printing press data) when proper printing is actually performed, that is, after adjustment by the printing press operator is completed. The pattern area ratio data obtained from the plate data) is sampled. Since conversion data is different for each of a large number of printing presses, and in order to improve conversion accuracy, it is necessary to sample the opening degree data and the printing plate data many times. The sampling workload is extremely large. Also, manual creation of conversion data performed after sampling is extremely heavy.
[0006]
The present invention has been made to solve the above problems. The purpose is to enable conversion data to be created automatically during normal operation in order to reduce workload and improve conversion accuracy. And it is providing the conversion data automatic generation apparatus for ink adjustment for achieving the objective.
[0007]
[Means for Solving the Problems]
The above problems are solved by the present invention described below. That is, the automatic adjustment conversion data generation device for ink adjustment according to claim 1 of the present invention uses the data calculated as the pattern area ratio corresponding to the ink key from the printing plate or the printing plate data as the image data as the calculated area ratio data. When the newly calculated area ratio data is given as the opening degree data, which is input to the means for automatically adjusting the opening of the ink key in the printing press, the conversion corresponding to the calculated area ratio data The data is called from the conversion table, and the called conversion data is converted into opening data by a predetermined conversion based on the correspondence between the opening data and the area ratio data, and the opening of the ink key is set by the opening data. a ink adjustment conversion data automatic generation system that generates conversion data when it is, every time the printing is performed in the printing machine, And the area ratio data out, and opening data of the ink key was last adjusted in the printing press, and registration means for registering the identification data thereof to identify the printing table to the attribute value to a database system, said from said database system Retrieval means for calling the calculated area ratio data and the opening degree data with specific data as a key, and calculating the adjusted area ratio data by predetermined conversion of the correspondence relationship from the opening degree data called by the searching means, Create a comparison table of the calculated area ratio data called together with the opening degree data and the calculated adjusted area ratio data, and average the plurality of adjusted area ratio data with respect to a predetermined calculated area ratio data value As a result, a conversion data value is calculated with respect to the predetermined calculated area ratio data value, and the final adjusted opening degree data exists. And as the value of the converted data values of the calculated area ratio data when the value of the adjusted area ratio data is not calculated so as not to, transformation of generating conversion data when computing the opening data of the ink keys in a printing press The generated conversion data is stored as an updated conversion table each time printing is performed as a conversion table indicating a correspondence relationship with the calculated area ratio data, and new plate data is given. The conversion data corresponding to the calculated area ratio data calculated from the printing plate data is called from the conversion table, and the called conversion data is the opening degree data by a predetermined conversion based on the correspondence relationship between the opening degree data and the area ratio data. The opening degree of the ink key is set by the opening degree data .
[0008]
According to the present invention, each time printing is performed on the printing press by the registration unit, the calculated area ratio data, the opening data of the ink key finally adjusted in the printing press, and the specific data for specifying the printing, A table as attribute values is registered in the database system, and the calculated area ratio data and the opening degree data are called from the database system by using the specific data as a key by the search means, and called by the search means by the conversion data generation means. Adjusted area ratio data is calculated from the calculated opening degree data by a predetermined conversion of the correspondence relationship, and a comparison table of the calculated area ratio data called together with the opening degree data and the calculated adjusted area ratio data is created, and a plurality of the adjusted average value of area ratio data with respect to the value of a given said calculated area ratio data The value of the calculated area ratio data is calculated when the value of the conversion data with respect to the value of the predetermined calculated area ratio data is calculated and the value of the adjusted area ratio data is not calculated because there is no final adjusted opening degree data. Is used as the value of the conversion data as it is, conversion data when calculating the opening data of the ink key in the printing press is generated , and the generated conversion data is used as a conversion table indicating a correspondence relationship with the calculated area ratio data. When the printing data is updated and stored every time printing is performed and new printing plate data is given, the conversion data corresponding to the calculated area ratio data calculated from the printing plate data is called from the conversion table, and the called conversion data Is converted into opening degree data by a predetermined conversion based on the correspondence relationship between the opening degree data and the area ratio data. The degree of opening of the Kiki is set. Accordingly, there is provided an ink adjustment conversion data automatic generation device capable of automatically generating conversion data during normal operation in order to reduce workload and improve conversion accuracy.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described. FIG. 1 shows an example of the configuration of an ink adjustment conversion data automatic generation device according to the present invention and devices directly related thereto. In FIG. 1, 1 is impositioned layout data (referred to herein as plate-making data), 2 is a RIP (raster image processor), 3 is a direct printing plate machine, 4 is a printing machine, 5 is an ink key adjustment data calculation device, 6 Is a conversion table calculation unit, 7 is a conversion table file, and 8 is a media writing / reading device (for example, a floppy disk device).
[0012]
In the plate making process, data such as characters, designs, photos, etc. is edited, and for example, processing for obtaining data in units of one page or spread pages is performed. In the printing process, printing is performed in units of 16 pages and 32 pages, and a signature is obtained by the folding unit. This signature becomes a continuous page.
[0013]
The plate-making data 1 is 16-page or 32-page data that has been subjected to page imposition (layout), and is data that has a corresponding relationship with each image of the printing plate that exists for the number of printing colors. The plate-making data 1 is usually composed of data in units of pages or individual data such as characters, designs, photographs, and others (print register marks, gradation marks, etc.) and data related to editing such as their layouts. Editable image data.
[0014]
The RIP 2 is a device that inputs the plate making data 1 and converts it into raster image data. The raster image data is image data for each print color having a multi-gradation (for example, a pixel value of 8 bits). Here, this raster image data is also called plate data.
[0015]
The direct printing press 3 includes a dot generator, an exposure unit, a development unit, and the like. The dot generator receives raster image data (press plate data) and generates dot data constituting halftone dots. The exposure unit inputs dot data and exposes the dots on the photosensitive plate material using a laser beam. The developing unit develops the exposed plate material. An image with halftone dots is formed on the printing plate thus obtained.
[0016]
The printing machine 4 prints on the printing paper using the printing plate to produce printed matter. At that time, the opening degree of the ink key in the ink device of the printing press 4 is adjusted. The ink key is an adjusting means for adjusting a gap for discharging ink in the ink fountain, that is, a gap between the ink discharging roller and the ink blade. By adjusting the gap, the ink film thickness on the surface of the ink discharge roller is adjusted. As a result, the amount of ink transferred from the ink discharge roller to the ink kneading roller can be adjusted by the ink calling roller.
[0017]
The opening degree of the ink key can be automatically adjusted based on the opening degree data. It can also be manually adjusted by the operator of the printing press. Usually, automatic adjustment is performed as an ink preset before starting printing, and manual adjustment is performed as a follow-up adjustment during printing.
[0018]
The ink key adjustment data calculation device 5 inputs raster image data (press plate data) output from the RIP 2. Then, adjustment data as distribution data corresponding to each ink key in the printing machine scheduled to be printed is calculated. This adjustment data is, for example, a pattern area ratio in a conventional ink preset system or a plate pattern area ratio meter. Here, “adjustment data” including wider contents is used together with “picture area ratio”.
[0019]
The conversion table calculation unit 6 calculates ink key opening data from the adjustment data when the conversion data corresponding to the printing machine to be printed exists in the conversion table file 7. This opening degree data is data for performing automatic adjustment by directly inputting the opening degree of the ink key in the printing press. For example, the opening degree data is the rotation rate of the ink key, the numerical value corresponding to the scale of the opening degree, the data such as the opening degree%, or the picture area ratio itself if it is an automatic adjustment means having a conversion function to them. This conversion table calculation unit 6 is a part of the ink key adjustment data calculation device 5 as shown in FIG.
[0020]
The conversion table file 7 is a data file of conversion data that is referred to when calculating the ink key opening degree data from the adjustment data. Specifically, the conversion data is a function of adjustment data and opening degree data, a table in which adjustment data and opening degree data are associated, and the like.
[0021]
The media writing / reading device 8 is a device such as a floppy disk device or a magneto-optical disk (MO) device, for example. The media writing / reading device 8 is a device for passing the opening degree data calculated by the ink key adjustment data calculating device 5 to the printing machine 4. Further, this is a device for passing final opening degree data and the like after the driver performs the follow-up adjustment from the printing press 4 to the ink key adjustment data calculation device 5. In the example shown in FIG. 1, a configuration in which data is transferred by a portable medium (media) is shown, but data transfer may be performed using a communication line such as a LAN (local area network).
[0022]
The above-described conversion table calculation unit 6 performs the above-described calculation (conversion calculation), the calculation for generating the conversion data itself (generation calculation), and the processing for updating the generated conversion data. That is, the ink adjustment conversion data automatic generation device of the present invention is incorporated in the conversion table calculation unit 6 in the example shown in FIG. This configuration is extremely suitable for handling related data. Of course, the ink adjustment conversion data automatic generation device of the present invention can be an independent device that is separate from the ink key adjustment data calculation device 5.
[0023]
The conversion table calculation unit 6 includes adjustment data corresponding to the ink key calculated by the ink key adjustment data calculation device 5 from the printing plate or printing plate data which is image data thereof, and opening data of the ink key finally adjusted in the printing machine 4. Then, a process for registering in the database system a table having specific data (for example, JobNo.) Specifying the printing as attribute values is performed. This registration process is performed every time a specific item is printed on the printing press, and a plurality of data are registered in the database.
[0024]
Moreover, the conversion table calculating part 6 performs the process which searches the adjustment data and opening degree data which were registered from the database system by using specific data as a key. Then, the conversion table calculation unit 6 performs processing for generating conversion data when calculating the opening data of the ink key in the printing press from the searched adjustment data and opening data (details will be described later).
[0025]
The conversion table calculation unit 6 performs a process of updating the conversion data referred to when calculating the opening of the ink key in the printing press with the generated conversion data. Thereby, the conversion data of the conversion table file 7 is automatically updated to a more appropriate one during normal operation.
Note that a storage device that stores the conversion table file 7 can be used as the storage device that constructs the database. Of course, any other storage device may be used.
[0026]
Next, a process for generating conversion data based on the ink key opening data after final adjustment will be described. First, the calculated area ratio data calculated by the ink adjustment data calculation device 5 and the adjusted area ratio data after adjusting the ink key in the printing machine are referred to as Job No. , Front and back, unit No., Key No. Is used as a key to create a comparison table of calculated area ratio data and adjusted area ratio data.
[0027]
Next, in the area ratio conversion table (see FIG. 3) for each of the printing presses, sampling values are set at locations that match the area ratio before adjustment. For example, assume that item A is printed on a certain printing press. For the printing unit with the printing machine, the ink key No. The calculated area ratio data calculated by the ink key adjustment data calculation device 5 for the item A corresponding to 1, 2, 3,. Further, the adjusted area ratio data after adjusting the ink key in the printing unit of the printing press is AAK1, AAK2, AAK3,.
[0028]
Similarly, it is assumed that item B is printed on the printing machine. For the same printing unit as described above, the calculated area ratio data is BK1, BK2, BK3. Further, the adjusted area ratio data after adjusting the ink key in the printing press is BAK1, BAK2, BAK3... (See FIG. 2).
[0029]
At this time, assuming that the calculated area ratio data “AK3”, “AK8”, “BK1”, “BK3” is 20%, the conversion data (individual conversion data) when the value calculated by the ink adjustment data calculation device 5 is 20%. Is represented by (AAK3 + AAK8 + BAK1 + BAK3) / 4. The last “4” is the number of samplings. In this example, since four data samplings of “AAK3”, “AAK8”, “BAK1”, and “BAK3” have been performed, “4” is set.
[0030]
The result calculated in this way is described in a conversion table (conversion data as a set) every time it is operated (see FIG. 3). Further, as in the 60% column shown in FIG. 3, conversion data that is not calculated at all is not converted, and the numerical value of 60% as it is is described as the conversion data.
[0031]
This conversion table is automatically new for printing presses that do not generate a conversion table by having the adjusted area ratio data after adjusting the ink key in the printing press read into the conversion data automatic generation device for ink adjustment. A conversion table is created, and an update process for the existing conversion table is performed for a printer that already has the conversion table. In addition, this conversion table can output data to a portable recording medium. Therefore, conversion data can be registered even with an off-line ink key adjustment data calculation device independent of the ink adjustment conversion data automatic generation device.
[0032]
【The invention's effect】
As described above , according to the present invention , conversion data can be automatically created during normal operation in order to reduce work load and improve conversion accuracy, and the opening degree of the ink key is highly accurate. It is calculated and the ink key preset in the printing press is optimized.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of the configuration of an ink adjustment conversion data automatic generation device according to the present invention and devices directly related thereto.
FIG. 2 is a diagram showing an example of a database table having adjustment data, opening degree data, and specific data as attribute values.
FIG. 3 is a diagram illustrating an example of conversion data (conversion table).
[Explanation of symbols]
1 Impositioned layout data (called plate-making data)
2 RIP (raster image processor)
3 Direct printing press 4 Printing machine 5 Ink key adjustment data calculation device 6 Conversion table calculation unit 7 Conversion table file 8 Media writing / reading device

Claims (1)

The data calculated as the pattern area ratio corresponding to the ink key from the printing plate or the printing plate data that is the image data is used as the calculated area ratio data, and is input to the means for automatically adjusting the opening of the ink key in the printing press for automatic adjustment. When calculated area ratio data is newly given as opening degree data, the conversion data corresponding to the calculated area ratio data is called from the conversion table, and the called conversion data is the opening degree data and An ink adjustment conversion data automatic generation device for generating conversion data when the opening degree of the ink key is set by the opening degree data by the predetermined conversion based on the correspondence relationship with the area ratio data. ,
Each time printing is performed on the printing press, a table with attribute values of calculated area ratio data, ink key opening data finally adjusted on the printing press, and specific data for specifying the printing is registered in the database system. Registration means to
Search means for calling the calculated area ratio data and the opening degree data using the specific data as a key from the database system;
The adjusted area ratio data is calculated from the opening degree data called by the search means by a predetermined conversion of the correspondence, and the calculated area ratio data called together with the opening degree data and the calculated adjusted area ratio data And a conversion data value for the predetermined calculated area ratio data value as an average value of the plurality of adjusted area ratio data for the predetermined calculated area ratio data value, and final adjustment When the adjusted area ratio data value is not calculated because the calculated opening degree data does not exist, the calculated area ratio data value is used as the conversion data value as it is, and the ink key opening degree data in the printing press is calculated. Conversion data generation means for generating the conversion data of
The generated conversion data is stored as it is updated as printing is performed as a conversion table indicating the correspondence with the calculated area ratio data, and is calculated from the plate data when new plate data is given. The conversion data corresponding to the calculated area ratio data is called from the conversion table, and the called conversion data is converted into opening degree data by a predetermined conversion based on the correspondence relationship between the opening degree data and the area ratio data, and An ink adjustment conversion data automatic generation device, wherein the opening degree of the ink key is set by the opening degree data .

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