JP2005271487A - Printing method and printing system - Google Patents

Abstract

To provide a printing method and a printing system capable of accurately correcting a first printing pattern even when a positional deviation occurs in a printed matter.
A printing method of the present invention is a printing method for correcting a printed matter on which a first print pattern is printed. This printing method compares the electronic data corresponding to the first print pattern with the electronic data corresponding to the second print pattern obtained by correcting the electronic data of the first print pattern for each equivalent address. Then, when different electronic data of both electronic data is extracted and the first print pattern is corrected, the positional deviation of the printed matter is detected (step S121), and the different electronic data is corrected so as to cancel the positional deviation. (Step S123), the printed material is overwritten based on the corrected electronic data.
[Selection] Figure 4

Description

  The present invention relates to a printing method and a printing system for correcting a printed matter on which a first printing pattern is printed.

Conventionally, corrections have been made to printed matter that has already been printed.
As an example of a method of adding this correction, a method shown below for correcting a printed matter having two or more print start marks is disclosed (for example, see Patent Document 1).
First, the number of steps (number of counting steps) between two marks is counted. Next, the number of counting steps is compared with the number of steps between two marks defined in advance (specified number of steps).

Next, the transport amount (paper feed amount) of the printed material is corrected based on the comparison result. For example, when the number of counting steps is larger than the specified number of steps, the transport amount is corrected so that the paper feed amount of the printed material is increased. On the other hand, when the number of counting steps is smaller than the specified number of steps, the paper feed amount is corrected so that the transport amount of the printed material becomes small.
Next, the printed material is corrected while being conveyed by the corrected paper feed amount.
However, in such a method, correction (printing) can be performed at a predetermined position with respect to the conveyance direction (paper feeding direction). However, when a positional deviation (for example, inclination) occurs in the printed matter, for example, There has been a problem that correction is made to an incorrect place (a place where correction is not necessary) such as another character being printed over a place where a character has already been printed.

JP 2003-25656 A

  An object of the present invention is to provide a printing method and a printing system capable of accurately correcting a first print pattern even when a positional deviation occurs in a printed matter.

Such an object is achieved by the present invention described below.
The printing method of the present invention is a printing method for modifying a printed matter on which a first print pattern is printed,
The electronic data corresponding to the first print pattern and the electronic data corresponding to the second print pattern obtained by correcting the electronic data of the first print pattern are compared for each equivalent address, When extracting the electronic data having different data and correcting the first print pattern, the positional deviation of the printed matter is detected, the different electronic data is corrected so as to cancel the positional deviation, and the corrected The printed matter is overwritten based on electronic data.
Thereby, even when a positional deviation occurs in the printed material, the first print pattern can be corrected accurately.

The printing method of the present invention is a printing method for correcting a printed matter on which a first printing pattern and a first marker and a second marker attached to different positions on a sheet are printed,
The electronic data corresponding to the first print pattern and the electronic data corresponding to the second print pattern obtained by correcting the electronic data of the first print pattern are compared for each equivalent address, When the electronic data having different data is extracted and the first print pattern is corrected, the position information of each of the first marker and the second marker is read, and the first information is read based on the position information. Information on the inclination of the printed material around the first marker around the marker is obtained, the different electronic data is corrected so as to correct the inclination, and the printed material is overwritten based on the corrected electronic data. It is characterized by that.
Thereby, even when a positional deviation occurs in the printed material, the first print pattern can be corrected accurately.

In the printing method of the present invention, when overwriting the printed matter, it is preferable that the start position is determined based on the first marker.
Thereby, even when a positional deviation occurs in the printed matter, the first printing pattern can be corrected accurately.
In the printing method of the present invention, when correcting the different electronic data, it is preferable that the address of the different electronic data is linearly converted into an address rotated by the inclination around the first marker.
Thereby, even when a positional deviation occurs in the printed material, the first print pattern can be corrected accurately.

The printing system of the present invention includes a printing unit capable of performing printing by correcting a printed matter on which the first printing pattern is printed,
Storage means for storing electronic data corresponding to the first print pattern and electronic data corresponding to a second print pattern obtained by correcting the electronic data of the first print pattern;
Extracting means for comparing the electronic data of the first print pattern and the electronic data of the second print pattern for each equivalent address, and extracting different electronic data of the two electronic data;
Detecting means for detecting positional deviation of the printed matter;
Correction means for correcting the different electronic data,
The electronic data of the first print pattern and the electronic data of the second print pattern that are called from the storage means by the operation of the extraction means are compared for each equivalent address, and different electronic data of both electronic data When the first print pattern is extracted, the position deviation is detected by the operation of the detection means, and the different electronic data is corrected by the operation of the correction means so as to cancel the position deviation. The printing means operates to overwrite the printed matter based on the corrected electronic data.
Thereby, even when a positional deviation occurs in the printed material, the first print pattern can be corrected accurately.

The printing system of the present invention can modify and print a printed matter on which the first printing pattern and the first marker and the second marker attached at different positions on the paper are printed. Printing means;
Storage means for storing electronic data corresponding to the first print pattern and electronic data corresponding to a second print pattern obtained by correcting the electronic data of the first print pattern;
Extracting means for comparing the electronic data of the first print pattern and the electronic data of the second print pattern for each equivalent address, and extracting different electronic data of the two electronic data;
The position information of each of the first marker and the second marker is read, and information on the inclination of the printed material around the first marker with the first marker as the center is obtained based on the position information. Detection means;
Correction means for correcting the different electronic data,
The electronic data of the first print pattern and the electronic data of the second print pattern that are called from the storage means by the operation of the extraction means are compared for each equivalent address, and different electronic data of both electronic data When correcting the first print pattern, the information on the inclination is obtained by the operation of the detection unit, the different electronic data is corrected by the operation of the correction unit so as to correct the inclination, The printing means operates to overwrite the printed matter based on the corrected electronic data.
Thereby, even when a positional deviation occurs in the printed material, the first print pattern can be corrected accurately.

In the printing system of the present invention, the detection unit includes an image recognition unit that recognizes the first marker and the second marker as images, and an image processing unit that processes each recognized image. Is preferred.
Thereby, the information regarding the inclination of printed matter is obtained reliably.

  Hereinafter, a printing method and a printing system of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings. Note that this embodiment is given as an example, and the contents of the present invention should not be construed in a limited manner. Hereinafter, in the present embodiment, as an example of a printing apparatus in the printing system of the present invention, an ink jet printer that discharges ink (liquid material) and prints a print pattern on a recording sheet (printed material) will be described.

  FIG. 1 is a schematic diagram showing an ink jet printer of the printing system of the present invention, FIG. 2 is a block diagram schematically showing the main part of the printing system of the present invention, and FIGS. 3 and 4 are respectively shown in FIG. FIG. 5 and FIG. 6 are schematic diagrams showing the flow of printing a printed matter with correction in the printing system, and FIG. 5 and FIG. 6 are examples of electronic data corresponding to the first print pattern and electronic data corresponding to the second print pattern, respectively. FIG. 7 is a diagram showing a printed matter on which the first print pattern shown in FIG. 5 is printed, FIGS. 8 and 9 are diagrams showing a printed matter on which the second print pattern shown in FIG. 6 is printed, FIG. 10 is an enlarged detailed view of a region [B] surrounded by a two-dot chain line in FIG. For convenience of explanation, the upper side in FIG. 1 will be described as “upper” and the lower side will be described as “lower”. For convenience of explanation, the characters (print patterns) in FIG. 7 (the same applies to FIGS. 8 and 9) are drawn exaggerated from the actual characters.

First, the recording paper P will be described.
The background of the recording paper P is white, and a first print pattern, a second print pattern obtained by modifying the first print pattern, and the like are printed. As the first print pattern is printed, the first marker M1, the second marker M2, and the barcode attached to different positions on the recording paper P (paper surface) are also printed (see FIG. 3). ). Here, the print pattern includes, for example, characters, figures, symbols, and the like that are printed on the recording paper P.

Further, as shown in FIG. 7, the first marker M1 and the second marker M2 each have a circular outer shape. In addition, two line segments that are substantially orthogonal to each other exist (printed) inside each marker (circle). That is, two cross-shaped line segments exist (printed) inside each marker (circle).
In addition, the correction includes adding a difference point from the second print pattern to the first print pattern, deleting the first print pattern, and the like.

Next, the printing system 1 will be described.
A printing system 1 shown in FIG. 2 includes an inkjet printer 2 and a host computer 8.
First, the configuration of the inkjet printer 2 will be described.
The inkjet printer 2 is a device that can modify the recording paper P on which the first printing pattern is printed. As shown in FIG. 1, the ink jet printer 2 includes an apparatus main body 23, and a new printing tray 21 in which the recording paper P is placed on the upper part and a reprinting in which the recording paper P is placed on the rear (back side). A tray 24, a paper discharge port 22 for discharging the recording paper P in front of the lower part, and an operation panel 7 on the upper surface are provided.

  The new printing tray 21 is a part (location) where recording paper P (in the blank state) on which the first printing pattern is not printed (hereinafter referred to as “unprinted paper P1”) is placed. The reprint tray 24 installs the recording paper P (printed paper P2) when correcting the recording paper P on which the first print pattern is printed (hereinafter referred to as “printed paper P2”). It is a part.

The operation panel 7 includes, for example, a liquid crystal display, an organic EL display, an LED lamp, and the like, and includes a display unit 71 that displays an error message and the like, and an operation unit 72 that includes various switches. The display unit 71 functions as a notification unit.
Further, inside the apparatus main body 23, mainly a printing unit (printing unit) 4 including a printing unit (moving body) 3 that reciprocates and a recording paper P (unprinted paper P1, printed paper P2) are printed. A paper supply unit 5 that supplies and discharges to the unit 4, a specifying unit 10 that specifies the preprinted paper P2, a detection unit 11 that detects the inclination (positional deviation) of the recording paper P (the preprinted paper P2), and an inkjet And a controller 6 for controlling each part and each means in the printer 2.

  Under the control of the control unit 6, the paper feeding unit 5 intermittently feeds the recording paper P one by one (paper feeding). This recording paper P passes near the lower part of the printing means 3. At this time, the printing unit 3 reciprocates in a direction substantially perpendicular to the feeding direction (paper feeding direction) of the recording paper P, and printing on the recording paper P is performed. That is, the reciprocating motion of the printing unit 3 and the intermittent feeding of the recording paper P are the main scanning and the sub scanning in printing, and ink jet printing is performed.

The printing unit 4 includes a printing unit 3, a carriage motor 41 serving as a driving source for moving (reciprocating) the printing unit 3 in the main scanning direction, and a reciprocating operation for reciprocating the printing unit 3 in response to the rotation of the carriage motor 41. Moving mechanism 42.
The printing unit 3 includes a plurality of head units 35, an ink cartridge (I / C) 31 that supplies ink to each head unit 35, and a carriage 32 that mounts each head unit 35 and the ink cartridge 31. . In the case of an ink jet printer that consumes a large amount of ink, the ink cartridge 31 is not mounted on the carriage 32 but is installed at a different location so that ink is supplied to the head unit 35 via a tube. It is good (not shown).

As the ink cartridge 31, a cartridge filled with ink of five colors of yellow, cyan, magenta, black (black), and white (white) is used, thereby enabling full color printing (multicolor printing). At this time, the printing unit 3 is provided with a head unit 35 that discharges ink corresponding to each color. Here, FIG. 1 shows five ink cartridges 31 corresponding to five colors of ink. However, the printing means 3 is an ink cartridge for other colors such as light cyan, light magenta, dark yellow, and special color ink. 31 may be further provided.
Thus, when the inkjet printer 2 (printing system 1) is configured to be capable of full-color printing, ink droplets corresponding to the correction can be ejected when the correction is made to the printed paper P2.

The reciprocating mechanism 42 includes a carriage guide shaft 422 supported at both ends by a frame (not shown), and a timing belt 421 extending in parallel with the carriage guide shaft 422.
The carriage 32 is supported by the carriage guide shaft 422 of the reciprocating mechanism 42 so as to be reciprocally movable, and is fixed to a part of the timing belt 421.

  When the timing belt 421 travels forward and backward via a pulley by the operation of the carriage motor 41, the printing unit 3 is reciprocated by being guided by the carriage guide shaft 422. During this reciprocation, ink droplets are appropriately ejected from each inkjet head 100 of the head unit 35 corresponding to the print pattern to be printed (first print pattern), and printing on the recording paper P is performed. Is called.

The sheet feeding unit 5 is rotated by the respective operations of the first sheet feeding motor 51 and the second sheet feeding motor 54, and the first sheet feeding motor 51 and the second sheet feeding motor 54, which are the driving sources. A first paper feed roller 52 and a second paper feed roller 55 are provided.
The first paper feeding roller 52 is composed of a driven roller 52a and a driving roller 52b that are vertically opposed to each other with a conveyance path (unprinted paper P1) of the unprinted paper P1 loaded (installed) in the new printing tray 21 interposed therebetween. The driving roller 52 b is connected to the first paper feed motor 51. As a result, the first paper feed roller 52 feeds a large number (a plurality) of unprinted sheets P1 installed in the new printing tray 21 one by one toward the printing unit 4, or one sheet from the printing unit 4. It is designed to be discharged one by one. Instead of the new printing tray 21, a configuration in which a paper feeding cassette that stores unprinted paper P <b> 1 can be detachably mounted may be employed.

  The second paper feed roller 55 is composed of a driven roller 55a and a drive roller 55b that are vertically opposed to each other with a conveyance path (preprinted paper P2) of the preprinted paper P2 loaded (installed) in the reprinting tray 24 interposed therebetween. The driving roller 55 b is configured to be connected to the second paper feed motor 54. As a result, it is configured to perform substantially the same operation as the first paper feed roller 52 described above. Note that, similarly to the new printing tray 21, the reprinting tray 24 may have a configuration in which a paper feeding cassette that stores the preprinted paper P <b> 2 can be detachably mounted.

  Further, the first paper feed motor 51 and the second paper feed motor 54 also feed the recording paper P according to the resolution of the image in conjunction with the reciprocating operation of the printing unit 3. The sheet feeding operation and the sheet feeding operation can be performed by different motors, respectively, or can be performed by the same motor depending on a part for switching torque transmission such as an electromagnetic clutch.

The specifying means 10 is provided in front of the second paper feed roller 55 (on the paper discharge port 22 side) (see FIG. 1). The specifying means 10 is constituted by a bar code reader, and reads the bar code of the preprinted paper P2 sent from the reprinting tray 24 via the second paper feed roller 55, whereby the preprinted paper P2 is read out. Configured to identify.
Thereby, it is possible to prevent the correction to the already-printed paper P2 other than the already-printed paper P2 to be corrected.

Similar to the specifying unit 10, the detecting unit 11 is provided in front of the second paper feeding roller 55 (on the paper discharge port 22 side) (see FIG. 1). The detection unit 11 includes an image recognition unit 111 and an image processing unit 112.
The image recognition unit 111 is configured by, for example, a CCD (Charge Coupled Device) camera. By the operation of the image recognition unit 111 (CCD camera), the first marker M1 and the second marker M2 printed (attached) on the preprinted paper P2 are recognized as images.

The image processing unit 112 is a part that processes the images of the first marker M1 and the second marker M2 recognized by the operation of the image recognition unit 111.
Here, mainly with reference to FIG. 9, a flow (method) in which the inclination (positional deviation) of the printed paper P2 is detected by the operation of the detection unit 11 will be described.
First, the paper feed roller 55 is operated under the control of the control unit 6, and the preprinted paper P2 is fed toward the detection means 11 (image recognition unit 111). For convenience of explanation, it is assumed that the preprinted paper P2 is fed with an inclination with respect to the paper feed direction (the arrow direction in FIG. 9).
After the paper feeding, the portion where the first marker M1 and the second marker M2 are printed on the preprinted paper P2 is positioned in the vicinity of the detection means 11 (image recognition unit 111).

Next, the image recognition unit 111 operates under the control of the control unit 6 to recognize the first marker M1 and the second marker M2.
Next, the image processing unit 112 is operated under the control of the control unit 6, and image processing (for example, binarization processing) is performed on the images of the first marker M1 and the second marker M2. By this image processing, position information of each of the first marker M1 and the second marker M2 is read. Specifically, by this image processing, the intersections (centers O1, O2) of the two line segments in each marker are detected.

Next, the electronic data of the line segment L1 stored in advance in the storage unit 62 is corrected so that the line segment L1 in the direction orthogonal to the paper feed direction passes through the center O1.
Next, by the operation of the image processing unit 112, an angle (an angle indicated by θ in FIG. 9) formed by the line segment L2 passing through the center O1 and the center O2 and the line segment L1 is detected (calculated). This angle θ is the inclination (position shift) of the printed paper P2.
By such a method, it is possible to reliably obtain information regarding the inclination (positional deviation) of the printed paper P2 around the center O1 (first marker M1) with the center O1 (first marker M1) as the center.

  For example, the control unit 6 includes electronic data corresponding to a first print pattern (hereinafter simply referred to as “first electronic data”) input from a host computer 8 such as a personal computer (PC), and first electronic data. Control of the printing unit 4, the paper feeding unit 5 and the like based on electronic data corresponding to the second print pattern whose data has been corrected (corrected) (hereinafter simply referred to as “second electronic data”). Thus, printing processing is performed on the recording paper P. The first electronic data is electronic data obtained by converting the first print pattern into data, and the second electronic data is electronic data obtained by converting the second print pattern into data.

  In addition, the control unit 6 displays an error message or the like on the display unit 71 of the operation panel 7 or lights / flashes an LED lamp or the like, and responds based on pressing signals of various switches input from the operation unit 72. The processing to be executed is executed by each unit. Furthermore, the control unit 6 may transfer information such as an error message or ejection abnormality to the host computer 8 as necessary.

Next, the configuration of the host computer 8 will be described.
As shown in FIG. 2, the host computer (personal computer) 8 includes a CPU (Central Processing Unit) 81, a storage unit (storage unit) 82, an extraction unit 83, and a correction unit 84.
The storage unit 82 includes a storage medium (recording medium) that can be read by the CPU 81, and the storage medium includes a magnetic or optical recording medium, a semiconductor memory, or the like. The storage unit 82 configured as described above stores the first electronic data and the second electronic data.

The extraction unit 83 compares the first electronic data and the second electronic data for each equivalent address, and extracts different electronic data of the two electronic data (hereinafter simply referred to as “different electronic data”). Operate.
When the correction unit 84 modifies the already-printed paper P2 on which the first print pattern is printed,
It operates to correct the difference electron data so as to correct the inclination θ of the printed paper P2 detected by the operation of the detecting means 11 (cancel (cancel) the positional deviation).

The inkjet printer 2 and the host computer 8 configured as described above are connected as shown in FIG.
An inkjet printer 2 shown in FIG. 2 includes an interface unit (IF) 9 that receives first electronic data, different electronic data, and the like input from a host computer 8, a control unit 6, a carriage motor 41, a carriage Carriage motor driver 43 for driving and controlling motor 41, first paper feeding motor 51, first paper feeding motor driver 53 for driving and controlling first paper feeding motor 51, and second paper feeding motor 54 , A second paper feed motor driver 56 that drives and controls the second paper feed motor 54, a head unit 35, a head driver 33 that drives and controls the head unit 35, the operation panel 7, the specifying means 10, and a detection Means 11 are provided.

  In FIG. 2, the control unit 6 includes a CPU (Central Processing Unit) 61 that executes various processes such as a printing process and a process for specifying the preprinted paper P2 (operation of the specifying unit 10), and an IF 9 from the host computer 8. EEPROM (Electrically Erasable Programmable Read-Only Memory) 62 (storage unit), which is a kind of nonvolatile semiconductor memory for storing electronic data such as first electronic data input via a data storage area (not shown), and specifying means A RAM (Random Access Memory) 63 that temporarily stores various data when executing the operations 10 or the like or temporarily develops application programs such as print processing is provided.

  When the control unit 6 obtains electronic data such as first electronic data from the host computer 8 via the IF 9, the control unit 6 stores the electronic data in the EEPROM 62. Then, the CPU 61 performs a predetermined process on the electronic data, and outputs a drive signal to each driver 33, 43, 53 (56) based on the process data and input data from various sensors. When these drive signals are input via the drivers 33, 43, 53 (56), a plurality of electrostatic actuators (not shown) of the head unit 35, the carriage motor 41 of the printing unit 4, and the paper feeding unit 5. Each operate. Thereby, the printing process is executed on the recording paper P.

As shown in FIG. 3, the printing system 1 configured in this way prints the already-printed paper P <b> 2 on which the first print pattern is printed with correction.
First, the flow of creating the preprinted paper P2 will be described.
As shown in FIG. 3, first, a first print pattern file (first electronic data) is created (step S101), and this file is stored (stored) in the storage unit 82 of the host computer 8 (step S101). S102).

Next, the inkjet printer 2 (control unit 6) is instructed to print the first print pattern file, and the first print pattern is printed on the unprinted paper P1 (step S103). Create P2. At this time, as the print information of the first electronic data, for example, the name of the file, the date and time when the file was saved, the save destination for saving the file, and the like are stored in the storage unit 82. (Step S104).
Further, the barcode is printed on the preprinted paper P2 so that the specifying means 10 can specify the preprinted paper P2 (step S105).
As described above, the preprinted paper P2 on which the barcode is printed is created (refer to the figure indicated by P2 on the lower right in FIG. 3).

Next, regarding the control operation when printing is performed with correction on the preprinted paper P2 on which the first print pattern is printed, the case is divided into the case where the positional deviation does not occur in the preprinted paper P2 and the case where it occurs. To explain.
[1] When the positional deviation of the preprinted paper P2 has not occurred First, the preprinted paper P2 is loaded on the reprint tray 24 (step S106), and the barcode is changed by the operation of the second paper feed roller 55. The paper is fed so as to be positioned near the specifying means 10.

  Next, the barcode of the printed paper P2 is read by the operation of the specifying unit 10 (step S107), and the printed paper P2 is specified. The barcode read in this way is transmitted to the host computer 8 (step S108), and the print information of the first electronic data corresponding to the barcode is listed (step S109). Here, listing means that print information is collected in a table format and displayed on the screen of the host computer 8.

Next, when the print information of the first electronic data listed is selected, a file (first electronic data) of the first print pattern is called from the storage unit 82, and an application (dedicated application) adapted to the file is called. ) Starts the file (step S110). At this time, a print image (hereinafter referred to as “print image A”) indicating a state when the first print pattern is printed is created (step S111).
Thus, by calling up the first electronic data, it is possible to prevent correction (correction) from being applied to electronic data other than the first electronic data to be corrected (corrected).

Next, using the dedicated application, the contents of the first print pattern file are modified (step S112) to create second electronic data. Then, the created second electronic data is stored in the storage unit 82 (step S113).
Next, a command is issued to print the modified first print pattern (second print pattern) (step S114). At this time, a print image (hereinafter referred to as “print image B”) indicating a state when the second print pattern is printed is created (step S115).

  Next, by the operation of the extraction means 83, the first electronic data and the second electronic data are compared for each equivalent address, that is, the print image A and the print image B are compared for each equivalent address (step S116), only the part (difference electron data) to which correction (correction) is applied is extracted (step S117). At this time, a print image (hereinafter referred to as “print image C”) indicating a state when the extracted portion is printed is created (step S118).

Next, the already-printed paper P2 to be corrected is reconfirmed (step S119).
Next, as described in the detection unit 11, the inclination θ (positional deviation) of the printed paper P2 is detected (steps S120 and S121).
Next, it is determined whether or not the preprinted paper P2 is inclined (step S122).
When it is determined that there is no inclination, that is, the inclination θ is zero, the printing unit 4 overwrites the already-printed paper P2 only for the electronic data (difference electronic data) extracted in this way. (Step S124).

  At this time, it is preferable that the overwriting start position is determined with reference to the center O1 (first marker M1). Thereby, for example, even if the center O1 (printed paper P2) is displaced in the paper feed direction or the direction perpendicular thereto, the movement start position of the head unit 35 when overwriting can be made constant, and thus Correction can be made more accurately with the printing paper P2.

By the control in step S124, a print pattern similar to the print image C is printed on the preprinted paper P2 (see the figure designated by P2 in the upper right in FIG. 3).
By such a flow, the first print pattern can be corrected, and the second print pattern can be efficiently printed on the preprinted paper P2.
Here, with reference to FIG. 5 to FIG. 8, a method for correcting the already-printed paper P <b> 2 will be described in more detail.

The first electronic data is electronic data (print image A) representing the Katakana character “K” as shown in FIG. 5, and the second electronic data is the electronic data representing the Katakana character “K” as shown in FIG. The case of (print image B) will be described as an example.
As shown in FIG. 5, in the address of the first electronic data, in the order from the upper left address (0.0) to the right, (0.0) and (1.0) indicate no electronic data (hereinafter referred to as “colorless”). ), (2.0) is black electronic data (hereinafter simply referred to as “black”), (3.0) to (1.1) are colorless, (2.1) is black, (3.1) )-(0.2) is colorless, (1.2) is black, (2.2)-(0.3) is colorless, (1.3) is black, (2.3)-(0.4 ) Is colorless, (1.4) to (6.4) is black, (0.5) is colorless, (1.5) is black, (2.5) and (3.5) are colorless, (4 .5) is black, (5.5) and (6.5) are colorless, (0.6) is black, (1.6) to (3.6) are colorless, (4.6) is black, (5.6) and (6.6) are colorless, (0.7) is Color, (1.7) to (3.7) is colorless, (4.7) is black, (5.7) to (3.8) is colorless, (4.8) is black, (5.8) ) To (2.9) are colorless, (3.9) is black, and (4.9) to (6.9) are colorless. The numerical values in parentheses indicate addresses.

  As shown in FIG. 6, in the address of the second electronic data, (0.0) and (1.0) are colorless, (2.0) and (3.0) are black, 4.0)-(1.1) is colorless, (2.1) is black, (3.1)-(0.2) is colorless, (1.2) is black, (2.2)-( 0.3) is colorless, (1.3) is black, (2.3) to (0.4) are colorless, (1.4) to (6.4) are black, and (0.5) is colorless , (1.5) is black, (2.5) and (3.5) are colorless, (4.5) is black, (5.5) and (6.5) are colorless, (0.6) Is black, (1.6) to (3.6) is colorless, (4.6) is black, (5.6) and (6.6) are colorless, (0.7) is black, (1. 7) to (3.7) are colorless, (4.7) is black, (5.7) to (3.8) are colorless, (4.8) But black, it is (5.8) - (2.9) is a colorless, (3.9) is black, (4.9) - (6.9) is colorless.

When such first electronic data and second electronic data are compared for each equivalent address, the different electronic data is present at the address (3.0) (the portion surrounded by a circle in FIG. 6). To do.
Based on the difference electronic data at this address (3.0), the first print pattern (see FIG. 7) is different from the second print pattern (see FIG. 8) (at the address (3.0)). When the additional portion is added, the printing unit 4 is configured to additionally write (overwrite) the different portion (indicated by point A in FIG. 8) in the same color as the first print pattern, that is, black. Yes. Note that the different locations to be additionally recorded may be additionally recorded in a color different from that of the first print pattern.
By such a flow, the first print pattern can be corrected accurately, and the second print pattern can be efficiently printed on the preprinted paper P2. Thereby, the cost required for printing (printing time, amount of ink used, etc.) can be reduced, and thus the printing efficiency can be increased.

[2] When positional deviation occurs in the preprinted paper P2 Steps S101 to S122 shown in FIGS. 3 and 4 are the same as in the case of [1].
As a result of the determination in step S122, when the printed paper P2 is tilted, that is, when θ is greater than zero, the correcting means 84 is operated and, as shown in FIG. The address (3.0) of the data) is the address (3 cos θ.3 sin θ) rotated around the center O1 (first marker M1) by a predetermined angle (tilt) θ (in FIG. 10 (the same applies to FIG. 9). ) And linear conversion (correction) to point A ′ (step S123). Thereby, corrected electronic data obtained by correcting the different electron data is obtained.

Next, the printing unit 4 operates to overwrite the already printed paper P2 based on the corrected electronic data (address) (step S124) (see FIG. 9).
At this time, it is preferable that the overwriting start position is determined based on the center O1 (first marker M1) as in [1]. Thereby, for example, even if the center O1 (printed paper P2) is shifted in the paper feed direction or the direction perpendicular thereto, the movement start position of the head unit 35 when overwriting can be made constant, Correction can be made more accurately with the printing paper P2.

Even if the preprinted paper P2 is tilted by the flow as described above, the first print pattern can be corrected accurately.
The background color of the recording paper P is not limited to white, and may be any color.
The printing system 1 is not limited to printing of five or more colors, and may be capable of printing two to four colors.
The inkjet printer 2 may be configured such that the new printing tray 21 also serves as the reprinting tray 24.

The printing method, the printing apparatus, and the printing system of the present invention have been described above with reference to the illustrated embodiment. However, the present invention is not limited to this, and each unit constituting the printing apparatus and the printing system has the same function. Can be substituted with any structure capable of exhibiting Moreover, arbitrary components may be added.
The printing apparatus is not limited to an inkjet printer, and may be a laser printer, a dot impact printer (dot printer), a thermal transfer printer (thermal head printer), or the like.

  Further, the specifying means is not limited to the configuration in which the bar code reader reads the bar code and specifies the recording sheet. For example, the specifying unit can enter (print) a number on the recording sheet and recognize the number. The recording paper may be specified, or when a plurality of recording papers are loaded in the reprinting tray, the recording paper number (order) is grasped and the recording paper is specified. It may be.

Further, when printing barcodes or numbers on recording paper, they may be printed with magnetic ink, fluorescent ink, or the like. Thereby, there is an advantage that barcodes, numbers, etc. are made invisible on the recording paper.
In addition, obtaining information related to the inclination (positional deviation) of the preprinted paper (recording paper) is not limited to obtaining the inclination directly. For example, the first marker (center) and the second marker (center) Information corresponding to the inclination may be obtained by processing each coordinate, or information for obtaining the inclination may be obtained by processing the coordinates of the first marker (center) and the second marker (center), respectively. Good.

Further, when the first print pattern is corrected, the difference electron data is obtained, the inclination of the printed matter is corrected only for the difference electron data, and is not limited to overwriting. The first electronic data and the second electronic data may all be corrected by correcting the amount of inclination of the printed matter to obtain the different electronic data, and may be overwritten.
Further, the correction of the different electron data is not limited to the primary conversion of the address of the different electron data. For example, the same applies to the different electron data in accordance with a known electronic data rotation processing method in image processing. The rotation process may be performed.

It is the schematic which shows the inkjet printer of the printing system of this invention. 1 is a block diagram schematically showing main parts of a printing system of the present invention. FIG. 3 is a schematic diagram illustrating a flow in which a printed material is corrected and printed in the printing system illustrated in FIG. 2. FIG. 3 is a schematic diagram illustrating a flow in which a printed material is corrected and printed in the printing system illustrated in FIG. 2. It is a figure which shows an example of the electronic data corresponding to a 1st printing pattern. It is a figure which shows an example of the electronic data corresponding to a 2nd printing pattern. It is a figure which shows the printed matter on which the 1st printing pattern shown in FIG. 5 was printed. It is a figure which shows the printed matter on which the 2nd printing pattern shown in FIG. 6 was printed. It is a figure which shows the printed matter on which the 2nd printing pattern shown in FIG. 6 was printed. FIG. 10 is an enlarged detail view of a region [B] surrounded by a two-dot chain line in FIG. 9.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Printing system 2 ... Inkjet printer 21 ... New printing tray 22 ... Paper discharge port 23 ... Apparatus main body 24 ... Reprinting tray 3 ... Printing means 31 ... Ink cartridge 32 ... Carriage 33 …… Head driver 35 …… Head unit 4 …… Print unit 41 …… Carriage motor 42 …… Reciprocating mechanism 421 …… Timing belt 422 …… Carriage guide shaft 43 …… Carriage motor driver 5 …… Paper feed unit 51 ... First feed motor 52... First feed roller 52 a... Followed roller 52 b .. Drive roller 53... First feed motor driver 54. Feeding roller 55a .. driven roller 55b .. driving roller 56..second feeding motor driver 6 .... control unit 61... CPU 62... EEPROM 63... RAM 7... Operation Panel 71... Display Unit 72 .. Operation Unit 8... Host Computer 81. Means 9 ... IF 10 ... Identification means 11 ... Detection means 111 ... Image recognition section 112 ... Image processing section 100 ... Inkjet head P ... Recording paper P1 ... Unprinted paper P2 ... Preprinted paper L1 , L2 ... line segment M1 ... first marker M2 ... second marker S101 to S124 ... step

Claims (7)

A printing method for modifying a printed matter on which a first printing pattern is printed,
The electronic data corresponding to the first print pattern and the electronic data corresponding to the second print pattern obtained by correcting the electronic data of the first print pattern are compared for each equivalent address, When extracting the electronic data having different data and correcting the first print pattern, the positional deviation of the printed matter is detected, the different electronic data is corrected so as to cancel the positional deviation, and the corrected A printing method comprising overwriting the printed material based on electronic data. A printing method for correcting a printed matter on which a first printed pattern and a first marker and a second marker attached to different positions on a paper surface are printed,
The electronic data corresponding to the first print pattern and the electronic data corresponding to the second print pattern obtained by correcting the electronic data of the first print pattern are compared for each equivalent address, When the electronic data having different data is extracted and the first print pattern is corrected, the position information of each of the first marker and the second marker is read, and the first information is read based on the position information. Information on the inclination of the printed material around the first marker around the marker is obtained, the different electronic data is corrected so as to correct the inclination, and the printed material is overwritten based on the corrected electronic data. A printing method characterized by the above.   3. The printing method according to claim 2, wherein when the printed material is overwritten, a start position thereof is determined with reference to the first marker.   4. The printing method according to claim 2, wherein when the different electronic data is corrected, the address of the different electronic data is linearly converted into an address rotated by the inclination around the first marker. Printing means capable of performing printing by correcting the printed matter on which the first printing pattern is printed;
Storage means for storing electronic data corresponding to the first print pattern and electronic data corresponding to a second print pattern obtained by correcting the electronic data of the first print pattern;
Extracting means for comparing the electronic data of the first print pattern and the electronic data of the second print pattern for each equivalent address, and extracting different electronic data of the two electronic data;
Detecting means for detecting positional deviation of the printed matter;
Correction means for correcting the different electronic data,
The electronic data of the first print pattern and the electronic data of the second print pattern that are called from the storage means by the operation of the extraction means are compared for each equivalent address, and different electronic data of both electronic data When the first print pattern is extracted, the position deviation is detected by the operation of the detection means, and the different electronic data is corrected by the operation of the correction means so as to cancel the position deviation. The printing system operates to overwrite the printed matter based on the corrected electronic data. Printing means capable of correcting and printing a printed matter on which a first printed pattern and a first marker and a second marker attached to different positions on the paper are printed;
Storage means for storing electronic data corresponding to the first print pattern and electronic data corresponding to a second print pattern obtained by correcting the electronic data of the first print pattern;
Extracting means for comparing the electronic data of the first print pattern and the electronic data of the second print pattern for each equivalent address, and extracting different electronic data of the two electronic data;
The position information of each of the first marker and the second marker is read, and information on the inclination of the printed material around the first marker with the first marker as the center is obtained based on the position information. Detection means;
Correction means for correcting the different electronic data,
The electronic data of the first print pattern and the electronic data of the second print pattern that are called from the storage means by the operation of the extraction means are compared for each equivalent address, and different electronic data of both electronic data When correcting the first print pattern, the information on the inclination is obtained by the operation of the detection unit, the different electronic data is corrected by the operation of the correction unit so as to correct the inclination, The printing system, wherein the printing unit operates to overwrite the printed matter based on the corrected electronic data.   The printing system according to claim 6, wherein the detection unit includes an image recognition unit that recognizes the first marker and the second marker as images, and an image processing unit that processes each recognized image. .

Images