JP6786980B2 - Image formation system, image formation device, and image formation control program - Google Patents

Description

The present invention relates to an image forming system, an image forming apparatus, and an image forming control program, and more particularly to a technique for accurately performing reprinting using long paper.

In an image forming apparatus such as a printer that forms an image based on image data, it is common to form an image on a paper called cut paper cut to a predetermined standard size such as A4 or B4.
In this type of image forming apparatus, it is also possible to form an image on long paper called continuous paper or roll paper, which has a longer paper length in the transport direction than standard size paper. In addition, such a long paper is often used for the purpose of repeatedly printing a sticker-type label such as an address, a serial number, or a product display.

On the other hand, in the image forming apparatus that forms an image on long paper, the "Eye Mark" printed on the roll paper in advance is read by a sensor, and the direction of paper transport (secondary scanning direction) is determined. There are products that form an image while correcting the image position according to the eye mark. Hereinafter, the printing method of printing according to the eye mark is referred to as "additional printing" (English: Over Print).

Reprinting is often used in cases such as forming an image of a background with a background image forming apparatus and printing another image with a background image forming apparatus. In the case of a large lot of printed matter, the printing cost of the monochrome image forming apparatus is lower than that of the color image forming apparatus. Therefore, if the background is formed by a monochrome image forming apparatus and the additional printing is formed by a color image forming apparatus, printing can be performed at low cost as a whole. In some cases, a special toner is set in the reprint image forming apparatus to form an image of a color that cannot be produced by a normal color image forming apparatus alone.

The output after reprinting may be applied to a post-processing device, for example, clear coating, laminating, die cutting, and the like. At this time, the post-processing apparatus performs processing based on the eye mark as in the case of reprinting. That is, the position reference in the paper transport direction is based on the eye mark, and all pages are image-formed at the same position.

The processing procedure for the follow-up printing using such an eye mark is shown in the flowchart of FIG.
In the background image forming apparatus, an eye mark is formed at a predetermined position (step S11 in FIG. 11), and a background image is formed in accordance with the eye mark (step S12 in FIG. 11). This is repeatedly executed for a predetermined image (step S13 in FIG. 11). Here, the paper is set from the background image forming apparatus to the reprint image forming apparatus.

Then, in the reprint image forming apparatus, the eye mark is read by the sensor (step S21 in FIG. 11), and the reprint image is formed according to the eye mark (step S22 in FIG. 11). After that, spoilage detection is performed (step S23 in FIG. 11), and this is repeated for a predetermined image (step S24 in FIG. 11).

Here, due to factors such as the magnification of the background image forming device being deviated, the long paper expanding and contracting, and the magnification of the reprint image forming device being deviated, even if the reprinting is performed based on the eye mark, it is generated. A situation may occur in which the position and magnification of the image are different from the theoretical values.
FIG. 12 schematically shows the state of reprinting using the eye mark. Hereinafter, the ideal case and the actual case will be compared and described.

In the background image forming apparatus, the eye mark MK_eye and the background image G_dwn are formed on the long paper PL (FIG. 12A). Then, in the reprint image forming apparatus, the eye mark MK_eye is read by the sensor of the long paper PL, and the reprint image G_up is formed with reference to the eye mark MK_eye (FIG. 12 (b)). This is the ideal state.

The actual situation will be described below. In the background image forming apparatus, the eye mark MK_eye and the background image G_dwn are formed on the long paper PL (FIG. 12 (c)). At this time, the long paper PL is output in a contracted state due to heat fixing of the background image forming apparatus. Then, in the reprint image forming apparatus, the eye mark MK_eye is read by the sensor, and the reprint image G_up is formed at a position at a predetermined distance with reference to the eye mark MK_eye (FIG. 12 (d)).

Here, as the long paper PL shrinks, the background image on the long paper PL also shrinks. Therefore, in order to form the reprint image G_up at a predetermined distance predetermined in a state without shrinkage (theoretical state) with reference to the eye mark MK_eye, the positions of the background image G_dwn and the reprint image G_up are initially set. It will be in a state that is out of schedule. That is, a deviation actually occurs as shown in FIG. 12 (d) with respect to FIG. 12 (b) in the ideal state.

That is, due to various factors such as the magnification of the underlying machine being deviated, the paper expanding and contracting, and the magnification of the reprinting machine being deviated, the image inspection is performed using the image reading unit in the subsequent stage of the reprinting image forming apparatus. When this is done, a defect is determined after the user image is printed. If it is determined to be spoiled in this way, the number of normal user images will decrease. As a result, the insufficient number of images is re-formed from the background image, which increases the burden on the user. Further, when a spoiled image occurs, a spoiled image and an image having no problem are mixed on one long paper PL.

Various proposals have been made in the following patent documents and the like regarding control between images in an image forming apparatus using long paper.

Japanese Unexamined Patent Publication No. 2014-19548 Japanese Unexamined Patent Publication No. 2012-24932 Japanese Unexamined Patent Publication No. 5-43128

In Patent Document 1 described above, the mark formed on the continuous paper is irradiated with a laser, and the positional deviation in the direction orthogonal to the detection member for detecting the mark can be easily confirmed. However, this technique adjusts the sensor position, and is different in problem and configuration from the technique of providing the follow-up printing adjustment section in order to adjust the deviation at the time of additional printing.

In the above Patent Document 2, there is a problem that desired color development cannot be obtained when printing with ink on continuous paper (film) made of a transparent member, and the additional printing is performed on white ink. I am getting color. At that time, the accuracy of the additional printing is improved by rewinding the continuous paper based on the number of images. However, this technology is premised on rewinding, and the configuration is different from the technology that does not rewind.

In Patent Document 3 described above, in an image forming apparatus that uses a recording paper roll and reciprocates a plurality of times to form images of different colors on the same image area of the recording paper and perform color printing, a registration mark and a registration sensor. We are proposing a skew detection device that can detect the amount of lateral displacement of recording paper using.

However, this technique has a problem that the image is skewed at the time of reprinting of continuous paper, and describes the shape of the resist mark, and is the shape of the eye mark in the prior art method. Even if the eye mark can be detected, there remains a problem that the problem that the reprint position shifts cannot be solved.

The present invention has been made to solve the above problems, and is an image forming system capable of solving the problem that the reprint position shifts even if the eye mark can be detected and performing appropriate reprinting. An object of the present invention is to provide an image forming apparatus and an image forming control program.

That is, in order to solve the above-mentioned problems, the image forming system, the image forming apparatus, and the image forming control program reflecting one aspect of the present invention are configured as follows.
(1) In an image forming system that reflects one aspect of the present invention, a background image forming unit that forms a background image, a reprint image forming unit that forms a reprint image, and a mark before forming the reprint image. It is equipped with a first reading unit that reads the image, a second reading unit that reads the mark after the reprint image is formed, and a control unit that adjusts the position when the reprint image is formed, and is more than a standard size paper. An image forming system that forms a reprint image after forming a base image on a long paper having a long paper length in the transport direction, and the base image forming unit forms a base image on the long paper. With respect to the first mark used for position confirmation in the additional printing and the first mark in the additional printing adjustment section defined on the tip side when forming the additional printing image on the long paper. A second mark used for position matching in reprinting is formed at a position of a predetermined distance, and the control unit is used in the reprinting adjustment section before the reprinting image forming unit forms a reprinting image. The first mark is read by the first reading unit to confirm the position of the additional printing, and the additional printing image forming unit forms the third mark at a predetermined distance from the first mark. 2 The positions of the second mark and the third mark are collated according to the reading result of the reading unit, and the reprint image forming unit produces a reprint image according to the positional relationship between the second mark and the third mark. It is characterized in that the position to be formed is adjusted.

Further, in the image forming apparatus reflecting one aspect of the present invention, the additional printing image forming unit for forming the additional printing image, the first reading unit for reading the mark before forming the additional printing image, and the additional printing image are included. It is equipped with a second reading unit that reads the mark after it is formed and a control unit that adjusts the position when forming a reprint image, for long paper that has a longer paper length in the transport direction than standard size paper. It is an image forming apparatus that forms a reprint image after the background image is formed by the background image forming unit, and forms a reprint image on the long paper when forming the background image on the long paper. In the additional printing adjustment section defined on the tip side at the time of printing, the first mark used for position confirmation in additional printing and the first mark used for position matching in additional printing at a predetermined distance from the first mark. The second mark to be formed is formed by the background image forming unit, and the control unit receives the first reading in the additional printing adjustment section before the additional printing image forming unit forms the additional printing image. The first mark is read by the unit to confirm the position of the additional printing, the third mark is formed by the additional printing image forming unit at a predetermined distance from the first mark, and the reading of the second reading unit is performed. Based on the result, the positions of the second mark and the third mark are collated, and the position where the reprint image forming unit forms the reprint image is adjusted according to the positional relationship between the second mark and the third mark. It is characterized by doing.

Further, the image formation control program reflecting one aspect of the present invention includes a background image forming unit that forms a background image, a reprint image forming unit that forms a reprint image, and a mark before forming the reprint image. It is equipped with a first reading unit that reads the image, a second reading unit that reads the mark after the reprint image is formed, and a control unit that adjusts the position when the reprint image is formed, and is more than a standard size paper. An image formation control program that controls an image formation system that forms a reprint image after forming a base image on a long paper having a long paper length in the transport direction. The base image forming unit is the long paper. When forming the base image on the paper, the first mark used for position confirmation in the additional printing in the additional printing adjustment section defined on the tip side when forming the additional printing image on the long paper, and A second mark used for position matching in reprinting is formed at a position at a predetermined distance from the first mark, and the control unit performs the reprinting image forming unit before forming the reprinting image. In the reprint adjustment section, the first mark is read by the first reading unit to confirm the position of the reprint, and the reprint image forming unit third at a position at a predetermined distance from the first mark. A mark is formed, the positions of the second mark and the third mark are collated based on the reading result of the second reading unit, and the reprint image is reprinted according to the positional relationship between the second mark and the third mark. It is characterized in that the computer of the image forming system is operated so as to adjust the position where the forming part forms a reprint image.

(2) In the above (1), the additional printing adjustment section is defined between the image forming section for forming the background image or the additional printing image and the edge of the long paper, and the background image forming. The unit forms a plurality of the first marks along the transport direction of the long paper, and a plurality of rows of the second marks along the transport direction of the long paper are referred to as the transport direction. A plurality of the control units are formed in the directions orthogonal to each other, and when the positions of the second mark and the third mark cannot be confirmed by collation in a certain row in the reprint adjustment section, the control unit in another row. The reprint image forming unit is controlled so as to adjust the position for forming the reprint image by collating the positions of the second mark and the third mark.

(3) In the above (1) to (2), the control unit collates the positions of the second mark and the third mark based on the set accuracy, and collates the positions of the second mark with the third mark. The position where the reprint image forming unit forms the reprint image is adjusted according to the positional relationship with the mark 3.
(4) In the above (1) to (3), the background image forming unit forms the second mark at a plurality of different positions with respect to the first mark in the reprint adjustment section. The control unit forms a third mark by the additional printing image forming unit at a plurality of different positions with respect to the first mark in the additional printing adjustment section, and the reading result of the second reading unit determines the third mark. The positions of the second mark and the third mark are collated at a plurality of positions.

(5 ) In the above (1) to ( 4 ), when the section in which the background image or the reprint image is formed on the long paper is set as the image forming section, the background image forming portion is the image forming section. The first mark and the second mark are formed in the margin portion, the reprint image forming unit forms the third mark in the margin portion of the image forming section, and the control unit adjusts the reprint. In the image forming section in addition to the section, the positions of the second mark and the third mark are collated, and the reprint image forming unit follows according to the positional relationship between the second mark and the third mark. Adjust the position to form the printed image.

( 6 ) In the above (1) to ( 4 ), when the section in which the background image or the reprint image is formed on the long paper is set as the image formation section, the background image forming unit is the reprint adjustment section. Then, the first mark and the second mark are formed, the first mark is formed in the margin portion of the image forming section, and the reprint image forming unit puts the third mark in the reprint adjustment section. The control unit collates the positions of the second mark and the third mark in the reprint adjustment section, and the control unit collates the positions of the second mark and the third mark and reprints an image according to the positional relationship between the second mark and the third mark. In the image forming section, the position where the reprint image is formed is confirmed by referring to the reading result of the first mark.

( 7 ) In (1) to ( 6 ) above, the control unit has the reprint image forming unit so that the positions of the second mark and the third mark match in the reprint adjustment section. It is characterized in that the position of forming a reprint image is adjusted.
( 8 ) In (1) to ( 6 ) above , when the section in which the background image or the reprint image is formed on the long paper is set as the image formation section, the control unit collates in the reprint adjustment section. When the positional relationship between the second mark and the third mark has a predetermined distance, the state of having the predetermined distance in the image forming section for forming the reprint image is eliminated. It is characterized in that the position where the reprint image forming unit forms a reprint image is adjusted.

According to the image forming system, the image forming apparatus, and the image forming control program reflecting one aspect of the present invention, the following effects can be obtained.
(1) In an image forming system, an image forming apparatus, and an image forming control program that reflect one aspect of the present invention, a background image is formed when a background image is formed on a long sheet of paper and then a reprint image is formed. In the reprint adjustment section, the section includes the first mark used for position confirmation in reprint and the second mark used for position verification in reprint at a predetermined distance from the first mark. The additional printing image forming unit confirms the position of the additional printing based on the reading result of the first mark in the additional printing adjustment section, and the additional printing image forming unit performs the third printing at a predetermined distance from the first mark. The mark is formed, the control unit collates the position based on the reading result of the second mark and the third mark, and the reprint image forming unit forms the reprint image according to the positional relationship between the second mark and the third mark. Adjust the position to do.

As a result, even if the first mark (eye mark) can be detected, in a situation where the reprint position shifts, the second mark formed by forming the background image at a predetermined distance from the first mark and the second mark formed by forming the background image and the first mark follow the predetermined distance. By collating the position with the third mark formed by the printed image formation, it is possible to accurately align the background image formation with the follow-up image formation.

(2) In the above (1), a plurality of rows of the second marks are formed in the direction orthogonal to the transport direction along the transport direction of the long paper, and are present in the reprint adjustment section. If matching cannot be confirmed by collating the positions of the second mark and the third mark in the column, adjust the position to form the reprint image by collating the positions of the second mark and the third mark in another column. ..

As a result, even if the first mark (eye mark) can be detected, in a situation where the reprint position shifts, the second mark formed by forming the background image at a predetermined distance from the first mark and the second mark formed by forming the background image and the first mark follow the predetermined distance. Position matching with the third mark formed in the printed image formation can be repeatedly executed, and accurate alignment between the background image formation and the follow-up image formation becomes possible. Further, by repeatedly executing the position collation while setting the reprint adjustment section to be short and eliminating the waste of long paper, it is possible to accurately align the background image formation and the reprint image formation.

(3) In the above (1) to (2), the positions of the second mark and the third mark are collated based on the set accuracy, and the positions of the second mark and the third mark are matched according to the positional relationship. By adjusting the position where the reprint image is formed, it is possible to align the background image formation and the reprint image formation within a range according to the required accuracy.

(4) In the above (1) to (3), in the reprint adjustment section, the background image forming unit forms the second mark at a plurality of different positions with respect to one first mark, and the reprint image forming unit. Formes a third mark at a plurality of different positions with respect to one first mark, and collates the positions of the second mark and the third mark at a plurality of positions to form a background image and perform additional printing. Accurate alignment is possible in a wide range with respect to image formation.

( 5 ) In (1) to ( 4 ) above, in the image formation section in addition to the reprint adjustment section, the positions of the second mark and the third mark are collated and adjusted to form the background image. With regard to reprint image formation, accurate alignment is possible from the beginning to the end of long paper.

( 6 ) In (1) to ( 4 ) above, by collating and adjusting the positions of the second mark and the third mark only in the reprint adjustment section, image formation is possible while enabling accurate alignment. It is possible to form an image without waste with a small margin in the section.
( 7 ) In the above (1) to ( 6 ), in the reprint adjustment section, the reprint image forming unit adjusts the position of forming the reprint image so that the positions of the second mark and the third mark match. By doing so, in a situation where the reprint position shifts even if the first mark (eye mark) can be detected, the second mark formed by forming the background image at a predetermined distance from the first mark and the predetermined distance from the first mark. By adjusting so as to match the third mark formed in the reprint image formation, accurate alignment between the background image formation and the reprint image formation becomes possible.

( 8 ) In (1) to ( 6 ) above, when the section where the background image or the reprint image is formed on the long paper is the image formation section, the second mark and the second mark collated in the reprint adjustment section are used. When the positional relationship with the 3 marks is in a state of having a predetermined distance, the reprint image forming unit forms a reprint image so as to eliminate the state of having a predetermined distance in the image forming section for forming the reprint image. In a situation where the reprint position shifts even if the first mark (eye mark) can be detected by adjusting the position to be used, the state of having a predetermined distance in the reprint adjustment section is an image forming section that forms a reprint image. This is resolved, and accurate alignment between background image formation and reprint image formation becomes possible.

It is a block diagram which shows the structure of the image formation system of embodiment of this invention. It is a block diagram which shows the structure of the image formation system of embodiment of this invention. It is a flowchart which shows the operation of the Embodiment of this invention. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is explanatory drawing which shows the state of image formation of the Embodiment of this invention schematically. It is a flowchart which shows the operation of the conventional reprint image formation. It is explanatory drawing which shows typically the state of the defect by the conventional reprint image formation.

Hereinafter, in the image formation system and the image formation control program, an embodiment in which image formation accompanied by reprinting is accurately performed using a roll-shaped long paper will be described in detail with reference to the drawings.
The operation of the image forming system 1 and the image forming apparatus 100 is an image forming control method. Further, the control unit 101 that controls the operation of the image forming system 1 and the image forming apparatus 100 is controlled based on the image forming control program.

[Configuration of image formation system]
Here, a configuration example of the image forming system 1 in which the paper feeding device 50, the image forming device 100, and the paper discharging device 200 are set will be described in detail with reference to FIGS. 1 and 2.
The image forming system 1 in which the paper feeding device 50, the image forming device 100, and the paper discharging device 200 are set shows an example of the image forming system, and other post-processing devices (not shown) are connected to the image forming system 1. Is also good. Further, in the present embodiment, it is assumed that the background image is formed and the reprint image is formed, but the background image formation may be performed by another image forming apparatus (not shown), or the image forming apparatus 100 may be used. You may do it. The additional printing image formation is performed by the image forming apparatus 100 as the additional printing image forming unit.

The paper feed device 50 includes a control unit 51, a communication unit 52, a paper feed unit 55, a paper feed adjustment unit 56, a transport unit 58, and a sensor 59. The control unit 51 controls each unit in the paper feeding device 50 based on the instruction of the control unit 101 described later. The communication unit 52 communicates with another device such as the set image forming device 100. The paper feeding unit 55 feeds long paper from the paper roll toward the image forming apparatus 100. The paper feed adjusting unit 56 absorbs fluctuations in the transport speed while adjusting the tension and slackness of the paper fed from the paper feed unit 55. The transport unit 58 transports the paper in the paper feeding device 50. The sensor 59 detects various states regarding paper transport.

The image forming apparatus 100 includes a control unit 101, a communication unit 102, a print controller 103, a storage unit 104, an operation display unit 105, an image forming transport unit 107, a sensor 109, a document reading unit 110, and a RIP. It is configured to include a processing unit 120, a data storage unit 130, an image processing unit 140, an image forming unit 150, a fixing unit 160, and an output reading unit 190.

The control unit 101 controls each unit in the image forming apparatus 100. The communication unit 102 communicates with another set device (external device, paper feeding device 50, paper ejection device 200, etc.). The print controller 103 receives job data described in the page description language from an external device and stores it as necessary. The storage unit 104 stores various settings. The operation display unit 105 accepts the operation input by the user and displays the status of the image forming apparatus 100. The image forming transport unit 107 transports the paper in the apparatus. The sensor 109 detects various states of the paper with respect to image formation and paper transport. The document reading unit 110 reads the image of the document by the image sensor and generates the document image data.

The RIP processing unit 120 executes RIP processing on the job data before the RIP processing described in the page description language received by the print controller 103, and converts the job data into bitmap format image data capable of forming an image. The data storage unit 130 stores image data and various data when forming an image. The data storage unit 130 includes a read image memory that accepts image data and a print image memory that outputs the received image data for image formation. The image processing unit 140 executes various image processing necessary for image formation. The image forming unit 150 forms an image on the paper based on the image forming command and the image data stored in the image memory for printing in the data storage unit 130. The fixing unit 160 stabilizes the image of the toner formed on the paper by heat and pressure. The output object reading unit 190 reads an image on paper and generates scanned image data.

The paper ejection device 200 includes a control unit 201, a communication unit 202, a cutting unit 203, a paper ejection adjusting unit 205, a transport unit 206, a paper ejection unit 208, and a sensor 209. .. The control unit 201 controls each unit in the paper ejection device 200 based on the control of the control unit 101. The communication unit 202 communicates with another device such as the set image forming device 100. The cutting section 203 cuts long paper at a predetermined position. The paper ejection adjusting unit 205 absorbs fluctuations in the conveying speed while adjusting the tension of the paper ejected from the image forming apparatus 100. The transport unit 206 transports the paper in the paper ejection device 200. The paper ejection unit 208 winds up the long paper from the image forming apparatus 100 into a roll shape and ejects the paper as a paper roll. The sensor 209 detects various states regarding paper transport.

In the image forming system 1 and the image forming apparatus 100 described above, the image forming unit 150 repeats the image forming in the first direction on the paper in the second direction (paper conveying direction) orthogonal to the first direction, thereby causing two dimensions. Image formation is being performed. Therefore, in the present embodiment, the first direction is defined as the main scanning direction, and the second direction is defined as the sub-scanning direction.

Further, in FIGS. 1 and 2, a case where long paper is handled as the image forming system 1 by the feeding device 50, the image forming device 100, and the paper ejection device 200 is shown as a specific example. Here, the long paper means a paper having a longer paper length in the transport direction than a standard size paper. Further, although FIG. 2 shows an image forming unit 150 that forms an image with a plurality of colors, the image forming unit 150 is not limited to this, and may be an image forming unit 150 that forms a monochrome image. Since various structures can be considered for paper feeding, image formation, and paper ejection, an example is shown in FIGS. 1 and 2, and the configuration and form are not limited to those shown in the specific example.

[Operation of the embodiment]
Hereinafter, the operation of the present embodiment in which the base image is formed and the reprint image is formed on the long paper PL will be described with reference to the flowchart of FIG. 3 and various explanatory diagrams after FIG.
In the long paper PL, the position shift in the additional printing is likely to occur at the beginning of the job. Therefore, at the time of forming the reprint image, it is desirable that the reprint position and the magnification have been adjusted before the reprint image is formed.

Therefore, in the long paper PL, the section in which the base image or the additional printing image is formed is defined as the image forming section, and the fixed area on the paper tip side from the image forming section at the time of forming the additional printing image is defined as the additional printing adjustment section.
Here, in addition to the existing "eye mark" as the first mark used for position confirmation in the additional printing image formation in the image forming section, in the present embodiment, in the additional printing adjustment section, the first mark is combined with the first mark. The background image forming apparatus forms a "check mark" on the long paper PL as a second mark used for position matching in additional printing at a position at a predetermined distance from one mark. Then, when the image forming apparatus 100 executes the additional printing image formation, the additional printing check mark as the third mark is additionally printed at a predetermined distance from the first mark in the additional printing adjustment section.

Then, in the image forming apparatus 100, in the additional printing adjustment section, the positions of the check mark as the second mark and the additional printing check mark as the third mark are collated, and the positional relationship between the second mark and the third mark is changed. The position for forming the reprint image is adjusted accordingly.
Here, as the positional relationship between the second mark and the third mark in the reprint adjustment section,
・ Positional relationship 1: "A state in which the second mark and the third mark match",
-Position relationship 2: "A state in which the second mark and the third mark have a predetermined distance",
Two types can be assumed.

In the following description, the entire description will be given using the positional relationship 1 (a state in which the second mark and the third mark match) as a specific example.
Therefore, the section length of the reprint adjustment section, the first mark position, the number of first marks, the first mark interval, the number of second marks, the second mark position (predetermined distance from the first mark to the second mark), etc. Information is shared between the image forming apparatus that executes the background image formation and the image forming apparatus that executes the additional printing image formation as the additional printing adjustment section information.

Further, in the long paper PL, the position shift in the additional printing is likely to occur at the beginning of the job. Therefore, at the time of forming the reprint image, it is desirable that the reprint position and the magnification have been adjusted before the reprint image is formed.
First, an image forming apparatus (image forming apparatus 100 or an external image forming apparatus (not shown): hereinafter referred to as “underground image forming apparatus”) that forms a background image obtains information on the paper passing direction in forming a reprint image. .. Here, it is confirmed whether the paper passing direction of the additional printing image formation is the same direction as the paper passing direction of the background image formation or the opposite direction. For example, if the roll of the long paper PL discharged by the background image forming apparatus is supplied to the additional printing image forming apparatus as it is, the paper passing direction becomes opposite. On the other hand, when the roll of the long paper PL discharged by the background image forming apparatus is rewound and then supplied to the reprint image forming apparatus, the paper passing direction becomes the same. The information on the paper passing direction may be obtained by the background image forming apparatus via the communication unit, or the operator may input the information into the operation unit of the background image forming apparatus.

When the paper passing direction of the additional printing image formation is the same as that of the background image formation (“same direction” in step S100 in FIG. 3), the background image forming apparatus prints a predetermined area from the tip of the long paper PL. It is secured as an adjustment section (step S101 in FIG. 3, reprint adjustment section in FIG. 4A or FIG. 5A).

Then, the background image forming apparatus forms an image of the eye mark MK_eye as the first mark for position confirmation at an interval equal to the image interval of the image forming section in the additional printing adjustment section (step S102 in FIG. 3, MK_eye) in the reprint adjustment section of FIG. 4 (a) or FIG. 5 (a). Further, the background image forming apparatus forms an image of the check mark MK_ck1 as the second mark at a position at a predetermined distance from the first mark in the additional printing adjustment section (step S103, FIG. 4A) in FIG. MK_ck1) in the reprint adjustment section of FIG. 5 (a).

After the addition of the first mark and the second mark in the above additional printing adjustment section is completed, the background image forming apparatus has a small size (large margin) (“small” in step S104 in FIG. 3). , The eye mark MK_eye as the first mark for position confirmation is image-formed (step S105 in FIG. 3, MK_eye in the image formation section of FIG. 4 (a)), and the check mark MK_ck1 as the second mark is image-formed. (Step S106 in FIG. 3, MK_ck1 in the image forming section of FIG. 4 (a)), and an image of the background image is formed (step S107 in FIG. 3, G_dwn in the image forming section of FIG. 4 (a)). ..

On the other hand, if the image is large in size (small margin) after the addition of the first mark and the second mark in the above-mentioned additional printing adjustment section is completed, the background image forming apparatus “large” in step S104 in FIG. ”), The eye mark MK_eye as the first mark for position confirmation is image-formed (step S108 in FIG. 3, MK_eye in the image forming section of FIG. 5 (a)), and the background image is formed (FIG. 3). Step S109 in the middle, G_dwn in the image formation section of FIG. 5 (a).

Then, the background image forming apparatus completes the background image forming process after executing the mark addition and the image formation in the image forming section for a predetermined number of predetermined numbers (step S110 in FIG. 3).
Further, when the paper passing direction of the additional printing image formation is opposite to that of the background image formation (“reverse direction” in step S100 in FIG. 3), the background image forming apparatus forms an image from the tip of the long paper PL. The section starts, and there is a reprint adjustment section on the rear end side of the long paper PL. When the paper passing direction of the additional printing image formation is opposite to that of the background image formation, not only the paper feeding direction of the long paper PL is reversed in the background image formation, but also the orientation of the mark and the background image. Is also in a different orientation from the reprint image formation.

Then, if the image has a small size (large margin) (“small” in step S111 in FIG. 3), the background image forming apparatus forms an image of the background image (steps S112 and 6 (a) in FIG. 3). ), The check mark MK_ck1 as the second mark is formed as an image (step S113 in FIG. 3, MK_ck1 in the image forming section of FIG. 6A), and the first position confirmation is performed. An image of the eye mark MK_eye as a mark is formed (step S114 in FIG. 3, MK_eye in the image forming section of FIG. 6A).

Further, if the image is large in size (small margin) (“large” in step S111 in FIG. 3), the background image forming apparatus forms an image of the background image (steps S115 and 6 (b) in FIG. 3). ), The eye mark MK_eye as the first mark for position confirmation is image-formed (step S116 in FIG. 3, MK_eye in the image-forming section of FIG. 6B).

After the image formation and mark addition in the above image formation section are completed, the background image forming apparatus secures a predetermined area at the rear end of the long paper PL as a reprint adjustment section (step S118 in FIG. 3). Further, the background image forming apparatus forms the check mark MK_ck1 as the second mark at a predetermined distance from the first mark at the same interval as the image in the image forming section in the additional printing adjustment section. (Step S119 in FIG. 3, MK_ck1 in the reprint adjustment section of FIG. 6 (a) or FIG. 6 (b)), and an image of the eye mark MK_eye as the first mark for position confirmation is formed (in FIG. 3). Step S120, MK_eye) in the reprint adjustment section of FIG. 6 (a) or FIG. 6 (b). Then, the background image forming apparatus completes the background image forming process after executing the mark addition in the additional printing adjustment section for a predetermined number of predetermined numbers.

The roll of the long paper PL on which the background image is formed by the background image forming apparatus is set by the operator in the paper feeding device 50 of the image forming system 1 having the image forming apparatus 100 as the additional printing image forming apparatus.
The long paper PL on which the base image is formed in the state of FIG. 4 or 5 is set in the paper feed device 50 after rewinding the roll in the state of being discharged by the base image forming device. On the other hand, the long paper PL on which the base image is formed in the state of FIG. 6 is set in the paper feed device 50 without rewinding the roll in the state of being discharged by the base image forming device. As a result, in any case, the reprint image formation is executed so that the image formation section exists after the reprint adjustment section in the state as shown in FIGS. 4 (b) and 5 (b). Become so.

Further, as already explained, the section length of the reprint adjustment section, the first mark position, the number of first marks, the first mark interval, the number of second marks, and the second mark position (from the first mark to the second mark). The control unit 101 of the image forming apparatus 100 grasps various information such as (predetermined distance) as additional printing adjustment section information.

First, the control unit 101 of the image forming apparatus 100 sets the accuracy of the position adjustment executed in the reprint adjustment section (step S200 in FIG. 4). For this accuracy setting, an accuracy setting value set in advance in the storage unit 104 of the image forming apparatus 100 may be used, or an accuracy setting value set for each user, each customer, or each application may be used. The accuracy setting value input in the operation display unit 105 may be used every time the job is executed. Further, the accuracy setting value may be a relative accuracy setting value such as "high / medium / low" or "high / low", or an absolute accuracy setting value such as "deviation tolerance value ≥ 0.1 mm". You may.

When the long paper PL set in the paper feed device 50 is fed to the image forming device 100, the sensor 109 reads the eye mark MK_eye as the first mark for position confirmation (step S201 in FIG. 3). ).
At that time, if it is a reprint adjustment section on the long paper PL (YES in step S202 in FIG. 3), the third mark is located at a predetermined distance from the read eye mark MK_eye on the long paper PL. The control unit 101 controls the image forming unit 150 so as to form the reprint check mark MK_ck2 (step S203 in FIG. 3).

Here, the position where the reprint check mark MK_ck2 is formed in the image forming apparatus 100 (a predetermined distance from the eye mark MK_eye) is the same as the position where the check mark MK_ck1 is formed in the background image forming apparatus (a predetermined distance from the eye mark MK_eye). is there. However, the position where the check mark MK_ck1 is formed due to factors such as the long paper PL shrinking due to the fixing of the background image forming apparatus or the magnification of the background image forming apparatus or the image forming apparatus 100 being deviated for some reason. And the position where the reprint check mark MK_ck2 is formed do not always exactly match.

Therefore, the control unit 101 uses the reading result of the check mark MK_ck1 and the reprint check mark MK_ck2 in the output reading unit 190 to collate whether the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 match. (Step S205 in FIG. 3).

If the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 match (“match” in step S205 in FIG. 3), the control unit 101 completes the reprint adjustment (step S205 in FIG. 3). On the other hand, if the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 do not match (“mismatch” in step S205 in FIG. 3), the control unit 101 eliminates the deviation according to the amount of deviation. The image formation position and the image formation magnification in the reprint image formation in the image forming unit 150 are adjusted (step S206 in FIG. 3).

In the reprint adjustment section of FIGS. 4 (b) and 5 (b), the check mark MK_ck1 (black “+”) and the reprint check mark MK_ck2 (gray “+”) are the tips of the long paper PL. From the first to the fourth set, there is a discrepancy even though they gradually approach each other, and the fifth set from the tip of the long paper PL shows a state of matching (additional printing adjustment completed). The colors and shapes of the check mark MK_ck1 and the reprint check mark MK_ck2 are not limited to the specific examples shown here.

Then, the eye mark MK_eye as the first mark for position confirmation is read by the sensor 109 (step S201 in FIG. 3), and at that time, it is not a reprint adjustment section on the long paper PL (step in FIG. 3). NO in S202), the control unit 101 determines whether or not the reprint adjustment is completed (step S205 in FIG. 3) (whether the completion has not been reached) (step S207 in FIG. 3).

When the reprint adjustment is not completed (NO in step S207 in FIG. 3), the control unit 101 confirms whether or not an unused check mark MK_ck1 exists in the reprint adjustment section (step in FIG. 3). S208).
In the example shown in FIG. 7, in the reprint adjustment section, the reprint check mark MK_ck2 is reprinted for all the check marks MK_ck1, and the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 do not match in all of them. .. That is, there is no unused check mark MK_ck1 in which the reprint check mark MK_ck2 is not reprinted (NO in step S208 in FIG. 3). In this case, since the reprint adjustment is not completed, the control unit 101 stops the reprint image formation and displays the error status on the operation display unit 105 (“reprint image formation / error end” in FIG. 3). ..

On the other hand, in the example shown in FIG. 8A, in the additional printing adjustment section, a plurality of rows (here, 5) of check marks MK_ck1 are orthogonal to the transport direction along the transport direction of the long paper PL. Multiple rows are formed in the direction (main scanning direction). Here, a state is shown in which five rows of check marks MK_ck1 along the transport direction are formed side by side in five rows in the main scanning direction.

In the example shown in FIG. 8B, in the reprint adjustment section, the reprint check mark MK_ck2 is reprinted on all the check marks MK_ck1 in the same row as the eye mark MK_eye (at the same position in the main scanning direction). The positions of the check mark MK_ck1 and the reprint check mark MK_ck2 do not match. That is, even after the reprint adjustment section has passed (NO in step S202 in the figure), the reprint adjustment is not completed (NO in step S207 in FIG. 3).

Here, there is an unused check mark MK_ck1 in which the reprint check mark MK_ck2 is not reprinted in the adjacent column (YES in step S208 in FIG. 3).
In this case, the control unit 101 sets each unit so as to perform additional printing adjustment with the unused check mark MK_ck1 (step S209 in FIG. 3), rewinds the long paper PL, and resets it in the paper feed device 50. The operation display unit 105 is displayed as described above to prompt the operator to reset the long paper PL (step S210 in FIG. 3). When the long paper PL is reset in the paper feed device 50, the control unit 101 returns to step S200 and starts the reprint adjustment using the unused check mark MK_ck1 (FIG. 8 (c)). At this time, the operator can also change the setting of the accuracy of the position adjustment executed in the reprint adjustment section (step S200 in FIG. 4).

By preparing the check mark MK_ck1 in a plurality of columns in this way, it is possible to execute the reprint adjustment a plurality of times. As a result, it is not necessary to form a reprint image in which the image forming section is displaced, and the long paper PL is not wasted.
In the case of FIG. 8C, the reprint adjustment is restarted using the check mark MK_ck1 in the second row, and the check mark MK_ck1 and the reprint check mark MK_ck2 match at the third from the top (in FIG. 3). An example of YES in step S204 and YES in S205 and S207) is shown. After that, in the image forming section, the control unit 101 controls the image forming unit 150 so as to form a reprint image G_up on the background image G_dwn according to the eye mark read by the sensor 109 (FIG. FIG. Step S210 in 3).

Regarding the state in which the overprint image G_up is overprinted on the background image G_dwn, the control unit 101 detects the overprint on the output reading unit 190 (step S211 in FIG. 3), and forms the overprint image and detects the overprint. Is repeated for a predetermined image (see step S212 in FIG. 3, an image forming section in FIG. 4 (b), an image forming section in FIG. 5 (b), and an image forming section in FIG. 8 (c)).

By the way, when there is a margin (particularly the margin at the end in the main scanning direction) between the background image and the reprint image, and it is possible to form the check mark MK_ck1 and the reprint check mark MK_ck2 even in the image formation section. By collating the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 (see FIGS. 4 and 8), it is possible to execute the spoilage detection (step S211 in FIG. 3) for the reprint image formation. In this case, high-precision and high-speed spoilage detection becomes possible.

On the other hand, when there are few margins (particularly the margins at the edges in the main scanning direction) between the background image and the reprint image, and it is difficult to form the check mark MK_ck1 and the reprint check mark MK_ck2 in the image forming section ( (See FIG. 5), it is possible to execute spoilage detection (step S211 in FIG. 3) by recognizing the positional relationship between the background image and the reprint image. In this case, it is possible to form an image using the entire main scanning direction of the paper.

In the above specific example, the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 have been shown to be the same positions as the eye mark MK_eye but different positions in the paper transport direction, but are limited to this. It is not something that is done. Further, in the above specific example, the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 have been shown to be near the middle between the eye mark MK_eye and the next eye mark MK_eye in the paper transport direction. It is not limited to this.

For example, as shown in FIG. 9A, the main part of the reprint image G_up is separated from the main scanning direction position and the paper transport direction position of the check mark MK_ck1 and the reprint check mark MK_ck2 on the long paper PL. Imagine a case. The same applies when the important part, the part to be noted, or the conspicuous part of the reprint image G_up is separated from the main scanning direction positions of the check mark MK_ck1 and the reprint check mark MK_ck2.

In such a case, ideally, it is assumed that an appropriate position as shown in FIG. 9A, for example, the lower end portion of the background image “A” and “⊚” of the reprint image are in contact with each other.
However, as shown in FIG. 9B, although the check mark MK_ck1 and the reprint check mark MK_ck2 are in the same position, the check mark MK_ck1 and the check mark MK_ck1 are caused by the difference in the image formation magnification and the paper shrinkage. At a position away from the reprint check mark MK_ck2, the lower end of the background image "A" and the "◎" of the reprint image may not come into contact with each other, resulting in an inappropriate state.

Therefore, as shown in FIG. 9C, it is also desirable to collate the positions of the check mark MK_ck1 at a plurality of different positions with the reprint check mark MK_ck2. Here, the collation is performed at a plurality of positions in the paper transport direction, but the collation is performed at a plurality of positions in the main scanning direction, and the collation is performed at a plurality of positions different in the paper transport direction and the sub-scanning direction. You may. In this case, not only the position adjustment of the plurality of points but also the magnification adjustment can be easily performed by referring to the positions of the plurality of points. Further, the plurality is not limited to 2, and may be 3 or more. Further, for the check mark MK_ck1 that is not used, an image may or may not be formed.

Further, as shown in FIG. 9D, it is also desirable to collate the positions of the check mark MK_ck1 existing at the position farthest from the eye mark MK_eye and the reprint check mark MK_ck2. In this case, since it is the farthest position, an error component is likely to appear, and it becomes possible to accurately perform position matching. Here, the farthest position is set in both the main scanning direction and the paper transport direction, but the farthest position in the paper transport direction (the main scanning direction is the same as or near the eye mark MK_eye) and the main scanning direction. It may be the farthest position (the paper transport direction is the same as or near the eye mark MK_eye). In this case as well, the unused check mark MK_ck1 may or may not be image-formed.

[Other Embodiments (1)]
In the above embodiments, the additional printing adjustment section defined on the tip side when forming the additional printing image on the long paper PL and the image forming section after the additional printing adjustment section have been described. However, in the reprint adjustment section, when the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 do not match (NO in step S207 in FIG. It is necessary to stop the transport of the long paper PL without starting the printing image formation.

Therefore, the distance from the primary transfer position to the secondary transfer position, which is first transferred to the intermediate transfer body, and the transfer position (secondary transfer position) of the image forming unit 150 to the reading position of the output reading unit 190. It is desirable that a buffering section (“buffering section” in FIG. 10) corresponding to the distance obtained by adding the distance between them is provided between the reprint adjustment section and the image forming section on the long paper PL.

[Other Embodiments (2)]
Further, in the above embodiment, the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 are collated with reference to the reading result of the output reading unit 190, but the present invention is not limited to this. For example, it is also possible to provide a dedicated sensor for collating the positions of the check mark MK_ck1 and the reprint check mark MK_ck2 immediately after the transfer position of the image forming unit 150. In this case, the buffer section described above can be shortened.

[Other Embodiments (3)]
Further, in the above embodiment, when the additional printing adjustment section remains because the additional printing is completed in the middle of the additional printing adjustment section, and a plurality of check marks MK_ck1 are formed by forming the background image. , The check mark MK_ck1 at another position different from the previous one may be overprinted and the check mark MK_ck2 may be overprinted to collate the positions. In this case, more accurate reprint adjustment becomes possible.

[Other Embodiments (4)]
Further, in the above-described embodiment, the eye mark for position confirmation has been described as a specific example of the first mark, but other marks, marks, and lines other than the mark called the eye mark are also the first in the present embodiment. When used in the same manner as the mark, it is a modification of the present embodiment. In addition, various modifications are possible within a range not contrary to the purpose of the present embodiment, and these are also included in the modified examples of the present embodiment.

Further, the check mark as the second mark and the reprint check mark as the third mark can be modified in various ways. For example, the second mark and the third mark are not limited to the same shape, and various deformations (color, line type, line thickness, shape, etc.) capable of collating the position match / mismatch are possible. is there. For example, the check mark MK_ck1 as the second mark has a shape having an outer frame such as "○", "□" or "◇", and the reprint check mark MK_ck2 as the third mark has "+" or "×". By forming a shape having an intersection near the center as in the above, it becomes easy to confirm the match or the mismatch.
[Other Embodiments (4)]
In the above description, as the positional relationship between the second mark (check mark MK_ck1) and the third mark (additional print check mark MK_ck2) in the additional printing adjustment section, the positional relationship 1 (the second mark and the third mark match). The whole explanation has been given using the state) as a concrete example.

On the other hand, as the positional relationship between the second mark (check mark MK_ck1) and the third mark (additional print check mark MK_ck2) in the additional printing adjustment section, the positional relationship 2 (the second mark and the third mark are a predetermined distance). It is also possible to have a state).
In this case, when the positional relationship between the second mark and the third mark collated in the reprint adjustment section has a predetermined distance, the control unit 101 sets the reprint image in the image forming section. The position where the image forming unit 100 forms the reprint image is adjusted so as to eliminate the state of having the predetermined distance.

As a result, in a situation where the reprint position shifts even if the first mark (eye mark) can be detected, the state of having a predetermined distance in the reprint adjustment section is eliminated in the image forming section that forms the reprint image, and the background is Accurate alignment between image formation and reprint image formation becomes possible.

In addition, this "state having a predetermined distance" may be "a state having a predetermined distance = a predetermined value", or "an arbitrary state obtained by collation at the final stage of the reprint adjustment section". It may be in a state of having a distance. In addition, by assuming that the state has a predetermined distance and the state of an arbitrary distance obtained by collation at the final stage of the reprint adjustment section, a predetermined match or a predetermined value is not reached in the reprint adjustment section. Even in some cases, there is an advantage that the reprint adjustment can be completed.

1 Image forming system 50 Paper feeding device 100 Image forming device 101 Control unit 102 Communication unit 103 Print controller 104 Storage unit 105 Operation display unit 107 Transport unit 109 Sensor 110 Document reading unit 120 RIP processing unit 130 Data storage unit 140 Image processing unit 150 Image forming unit 160 Fixing unit 190 Output material reading unit 200 Paper ejection device

Claims (10)

A background image forming unit that forms a background image, a reprint image forming unit that forms a reprint image, a first reading unit that reads a mark before forming a reprint image, and a mark after the reprint image is formed. It is equipped with a second reading unit that reads the image and a control unit that adjusts the position when forming a reprint image, and can display the background image on long paper that has a longer paper length in the transport direction than standard size paper. An image forming system that forms a reprint image after it is formed.
The background image forming portion is a position for additional printing in a supplementary printing adjustment section defined on the tip side when forming a supplementary printing image on the long paper when forming a background image on the long paper. A first mark used for confirmation and a second mark used for position matching in additional printing at a predetermined distance from the first mark are formed.
The control unit reads the first mark by the first reading unit in the additional printing adjustment section to confirm the position of the additional printing before the additional printing image forming unit forms the additional printing image. A third mark is formed by the reprint image forming unit at a predetermined distance from the first mark, and the positions of the second mark and the third mark are collated based on the reading result of the second reading unit. The position where the reprint image forming unit forms the reprint image is adjusted according to the positional relationship between the second mark and the third mark.
An image forming system characterized by this. The reprint adjustment section is defined between an image forming section for forming a background image or a reprint image and an edge of the long paper.
The base image forming unit forms a plurality of the first marks along the transport direction of the long paper, and a row of the plurality of second marks along the transport direction of the long paper. Multiple forms are formed in the direction orthogonal to the transport direction,
When the control unit cannot confirm the coincidence between the positions of the second mark and the third mark in a certain row in the reprint adjustment section by collating, the control unit performs the second mark and the third mark in another row. The reprint image forming unit is controlled so as to adjust the position for forming the reprint image by collating the position with the mark.
The image forming system according to claim 1. The control unit collates the positions of the second mark and the third mark based on the set accuracy, and forms the reprint image according to the positional relationship between the second mark and the third mark. Adjust the position where the part forms the reprint image,
The image forming system according to any one of claims 1 to 2, wherein the image forming system is characterized in that. The background image forming portion forms the second mark at a plurality of different positions with respect to the first mark in the reprint adjustment section.
The control unit forms a third mark by the additional printing image forming unit at a plurality of different positions with respect to the first mark in the additional printing adjustment section, and the reading result of the second reading unit determines the third mark. Collate the positions of the second mark and the third mark at a plurality of positions.
The image forming system according to any one of claims 1 to 3, wherein the image forming system is characterized in that. When the section on which the base image or the reprint image is formed on the long paper is used as the image forming section,
The background image forming portion forms the first mark and the second mark in the margin portion of the image forming section.
The reprint image forming portion forms the third mark in the margin portion of the image forming section, and forms the third mark.
The control unit collates the positions of the second mark and the third mark in the image forming section in addition to the reprint adjustment section, and responds to the positional relationship between the second mark and the third mark. The position where the reprint image forming unit forms the reprint image is adjusted.
The image forming system according to any one of claims 1 to 4, wherein the image forming system is characterized in that. When the section on which the base image or the reprint image is formed on the long paper is used as the image forming section,
The background image forming portion forms the first mark and the second mark in the additional printing adjustment section, and forms the first mark in the margin portion of the image forming section.
The reprint image forming unit forms the third mark in the reprint adjustment section , and forms the third mark.
Wherein the control unit is placed between the overprinting adjustment ku, additionally have printing according to the positional relationship between the third mark and the second mark position matching to the between the third mark and the second mark The position where the image is formed is adjusted, and the position where the reprint image is formed is confirmed in the image forming section by referring to the reading result of the first mark .
The image forming system according to any one of claims 1 to 4 , wherein the image forming system is characterized in that. Before SL control section, at the overprinting adjustment section adjusts the position of forming the overprinting image forming unit overprinting image so that the position of the third mark and the second mark are identical,
The image forming system according to any one of claims 1 to 6 , wherein the image forming system is characterized in that. When the section on which the base image or the reprint image is formed on the long paper is used as the image forming section,
Prior Symbol controller, when the positional relationship between the third mark and the second mark are collated in the overprinting adjustment section is in a state having a predetermined distance, said image forming section to form an overprinting images The position where the reprint image forming unit forms the reprint image is adjusted so as to eliminate the state of having the predetermined distance .
The image forming system according to any one of claims 1 to 6 , wherein the image forming system is characterized in that. A reprint image forming unit that forms a reprint image, a first reading unit that reads a mark before forming a reprint image, a second reading unit that reads a mark after the reprint image is formed, and a reprint image. It is equipped with a control unit that adjusts the position when forming the image, and reprints after the background image is formed by the background image forming unit on long paper that has a longer paper length in the transport direction than standard size paper. An image forming device that forms an image
A first used for position confirmation in additional printing in the additional printing adjustment section defined on the tip side when forming the additional printing image on the long paper when forming the base image on the long paper. The mark and the second mark used for position matching in additional printing at a position at a predetermined distance from the first mark are formed by the background image forming portion.
Before SL control unit, before the overprinting image forming unit forms an overprinting images, with the overprinting adjustment section performs localization of printing chase by reading the first mark by the first reading section, A third mark is formed by the reprint image forming unit at a predetermined distance from the first mark, and the positions of the second mark and the third mark are collated based on the reading result of the second reading unit. , The position where the reprint image forming unit forms the reprint image is adjusted according to the positional relationship between the second mark and the third mark.
Images forming device you wherein a. A background image forming unit that forms a background image, a reprint image forming unit that forms a reprint image, a first reading unit that reads a mark before forming a reprint image, and a mark after the reprint image is formed. A second reading unit for reading the image and a control unit for adjusting the position when forming a reprint image are provided .
To the constant size of type long long paper sheet length in the carrying direction than the paper, an image formation control program for controlling an image forming system for forming an overprinting image after forming the lower ground image,
The background image forming portion is a position for additional printing in a supplementary printing adjustment section defined on the tip side when forming a supplementary printing image on the long paper when forming a background image on the long paper. a first mark that is used to check, and a second mark that is used for position matching in printing chase at the position of a predetermined distance with respect to the first mark is formed,
The control unit reads the first mark by the first reading unit in the additional printing adjustment section to confirm the position of the additional printing before the additional printing image forming unit forms the additional printing image. A third mark is formed by the reprint image forming unit at a predetermined distance from the first mark, and the positions of the second mark and the third mark are collated based on the reading result of the second reading unit. The position where the reprint image forming unit forms the reprint image is adjusted according to the positional relationship between the second mark and the third mark.
An image formation control program , characterized in that the computer of the image formation system is made to function .