JPH11315484A - Apparatus for forming image and image formation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus enabling even a stretchable recording medium to record precisely superposed images, by attaching recording agents to the front surface of a recording medium form recording heads to form a front surface image, then attaching recording agents to the back surface of the above recording medium from recording heads to form a back surface image under the control of positioning for superposing both the images. SOLUTION: This method for forming the images comprises delivering a recording medium 101, such as a polyester fabric, from an unwind roll 102, jetting recording agents containing prescribed dyes to the front surface of the recording medium 10 from the ink jet heads 105-122 of the first recording means 104 on the first carrying means 123 comprising a platen to form the front surface image on the recording medium 101, turning over the recording medium 101 through a turnover means 145, jetting recording agents to the back surface of the turned-over recording medium 101 from ink jet heads 126-141 of the second recording means 125 on a platen of the second carrying means 142 to form the back surface image, while the back surface image is controlled to be superposed on the front surface image of the above recording medium 101 through the recording medium 101 by the action of a positioning controller for superposing both the images, and finally winding the recording medium 101 on a wind roll 103 via a drying machine 143.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image forming apparatus and an image forming method for forming an image on a recording medium, and more particularly, to an image forming apparatus and an image forming apparatus for forming an image on a stretchable recording medium such as a cloth. About the method. Further, the present invention relates to an image forming apparatus and an image forming method employing an ink jet system for forming an image using an ink jet head for discharging ink.

[0002]

2. Description of the Related Art A recording apparatus employing an ink jet system for performing recording by discharging ink onto a recording material is widely used because of its ease of use.

An ink jet recording apparatus has an ink jet head for ejecting ink droplets, and an ink tank for storing ink to be supplied to the ink jet head. The inkjet head has a discharge port for discharging ink. An ejection energy generating element for ejecting ink is provided near the ejection port. Examples of the energy generating element include a heating element for applying thermal energy to the ink and a piezoelectric element for applying a mechanical pressure to the ink to discharge the ink. The ink tank and the discharge port communicate with each other so that the liquid flows through the ink flow path.

[0004] In recent years, an image forming apparatus that performs printing using an ink jet system has been known. Unlike conventional screen printing devices, this type of printing device does not require an original plate of the image to be printed, so it has a high degree of freedom in the image that can be printed, and the overall cost of printing is small. There are advantages.

[0005]

In textile printing, printing is performed on a fabric by impregnating the fiber with a dye in an ink such as a dye and fixing the fiber.
More dye must be impregnated and fixed in the fiber. As a standard of the impregnation amount, evaluation of a so-called strike-through amount by observation from the back side, which is a non-recording side, is generally used.

In the field of textile printing, in order to increase the commercial value of a fabric on which an image is formed, it is desired to perform printing so that an image is formed even when viewed from either direction. Especially when used for clothing such as handkerchiefs and scarves, and for decoration such as curtains, it is rarely seen only from one side of the fabric, and the amount of strike-through is increased so that each is paired on the front and back sides It is preferable that an image is formed on the substrate.

For the purpose of increasing the amount of strike-through, it is conceivable to print from both the front and back of the fabric. However, it is very difficult to print on the front and back of the fabric in both the ink jet printing system and the screen printing system. It was difficult. In particular, it has not been known that an image is formed so that the image on the front and the back coincides with the image on the front and the back. The following methods can be mentioned as a method of printing on the front and back of this cloth, but none of them is sufficient.

(1) A method of improving the penetration of the dye so that the dye penetrates to the back surface.

In this method, the printing target is limited to a thin cloth. In addition, since the dye easily penetrates into the cloth, the image formed on the cloth is blurred.
In addition, when trying to suppress bleeding, the dye does not reach the back surface of the fabric, and furthermore, it does not penetrate to the back surface of a thick fabric, so that images cannot be formed on both the front and back surfaces of the fabric.

(2) A method of dyeing the whole cloth in advance (dip-dyeing) and then printing a new printed pattern on the dyed dyed cloth while decolorizing in accordance with the printed pattern (discharge dyeing).

This method is a method of printing with an ink containing a decolorizing agent which is decolorized and a dye which is not decolorized by the decoloring agent. Only one color of dip dye is printed on the back surface of the fabric at a uniform density. The color has the same result as the method (1) described above.

In addition, there are limitations on the types of dyes, such as the need to select dyes that are decolorized and dyes that are not decolorized.
It is not always possible to use a dye having good coloring.

Next, there is a method of printing a printed pattern from both sides of the fabric. However, it has been difficult to form a good image on both sides of the fabric.

(3) Double-sided printing by a screen printing method.

There is a method in which after printing on the surface of the fabric, the fabric is turned upside down, and subsequently, printing is performed on the back surface of the fabric. However, since the back side is printed after the front side is printed, when the cloth is turned upside down, the expansion / contraction or distortion of the fabric differs between the front side printing and the back side printing, and the images on the front and back sides do not match.

(4) Double-sided printing by an ink-jet printing method.

With a recording medium having little elasticity such as paper and film, for example, as disclosed in US Pat. No. 5,376,957, printing can be performed simultaneously from the front and back of the recording medium. In the case of a material having elasticity as in the case, it is not possible to convey accurately with two pairs of rollers as disclosed in the present invention, and unevenness on the band occurs on the cloth, so that there is no defect. Printing was difficult.

As described above, in the conventional printing apparatus and method, when the reverse side printing is performed after the plate printing on the surface of the cloth, the cloth is deformed because the cloth is flexible and stretchable. It was difficult to match the printed pattern on the front surface with the printed pattern on the back surface (registration of the front and back). For this reason, printing on the fabric is performed exclusively on the front side, and the back side of the fabric printed only on the front side becomes whitish as compared with the front side, and as a result, its use is limited and commercial value cannot be increased.

As described above, in the prior art, it was not possible to form an identical image on both the front and back sides so that the image density would be the same.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is intended to match the image on both the front and back surfaces of a recording medium for a special purpose having elasticity and to suppress the occurrence of color unevenness. It is an object of the present invention to provide an image forming apparatus and an image forming method capable of forming a high-quality image with high color reproducibility.

The present invention enables printing from both sides of a cloth, realizes the maximum amount of strike-through of dye ink, and requires a vivid printed pattern on both the front and back sides, such as a scarf or handkerchief. It is an object of the present invention to provide an image forming apparatus and an image forming method capable of performing printing on a fabric suitably for use.

[0022]

According to the present invention, there is provided an image forming apparatus for forming an image on a recording medium using a recording head, comprising: a conveying means for conveying the recording medium; Determining means for determining the state of the recording medium, processing means for processing image data to be recorded according to the determination result, and forming an image on the one of the front and back surfaces of the recording medium by the recording head according to the image data; The state of the recording medium when the recording medium having an image formed on one surface is conveyed by the conveying means is determined by the determining means, and the image is processed according to the image data processed by the processing means according to the determination result. And recording control means for forming an image on the surface opposite to the surface on which is formed by the recording head.

According to the present invention, there is provided an image forming apparatus comprising:
A first recording unit that is provided at a position facing the surface of the recording medium and that applies a recording agent onto the surface of the recording medium by a recording head to form a surface image; A first conveying means for conveying the recording medium, and a second recording means provided at a position opposing the back surface of the recording medium and applying a recording agent on the back surface of the recording medium by a recording head to form a surface image. A second medium that is provided on an extension of the conveyance path of the first conveyance means and conveys the recording medium conveyed from the first conveyance means to the second recording means.
An image is formed such that a back surface image formed on the back surface of the recording medium by the second recording unit matches a front surface image formed on the front surface of the recording medium by the transporting unit and the first recording unit. And a double-sided positioning control means for performing the positioning described above.

According to another aspect of the present invention, there is provided an image forming apparatus for forming an image on a recording medium, comprising: conveying means for conveying the recording medium; and facing a surface of the recording medium conveyed by the conveying means. A recording unit that applies a recording agent onto the surface of the recording medium by a recording head to form a surface image, and is provided on an extension path of the conveyance unit, and holds a recording start position of the recording medium from the conveyance unit. Recording medium storage means for temporarily storing the recording medium while the recording medium is conveyed from a recording start position of the recording medium stored in the recording medium storage means, and a reverse side of the recording medium conveyed to face the recording means. Means, a back-side image creating means for sending image data inverted in the transport direction to the recording means, and a shape on the front surface of the recording medium conveyed by the recording medium inverting and conveying means. With respect to the surface image obtained by, characterized in that a double-sided alignment control means for aligning both sides positioned as the back side image formed on the rear surface of the recording medium is formed in agreement.

The present invention also relates to an image forming method for forming an image on a recording medium by applying a recording agent to a recording medium, wherein the recording agent is applied to one of the front and back surfaces of the recording medium in accordance with image data. A first image forming step of forming an image by performing the process, a transporting step of transporting the recording medium on which the image is formed in the first image forming step, and determining a state of the recording medium transported in the transporting step A determining step, a processing step of processing the image data according to the determination result of the determining step, and a surface on which an image is formed in the first image forming step according to the image data processed by the processing step. A second image forming step of forming an image by applying a recording agent to the surface.

Further, the present invention is characterized in that it is an image forming apparatus and an image forming method of an ink jet system using an ink jet head for discharging ink.

Further, the ink jet head is an ink jet head of a type which discharges ink using thermal energy.

The present invention is further characterized in that a cloth is used as a recording medium.

With the above arrangement, according to the present invention, it is possible to form a high-quality image by matching images on both sides of a recording medium.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Embodiment 1> This embodiment shows an example in which the present invention is applied to an ink jet type textile printing machine which forms an image by discharging ink. FIG. 1 shows the first embodiment of the present invention. 1 is a structural sectional view illustrating a schematic configuration of a full-color inkjet recording apparatus according to an embodiment of the present invention.

Here, the term "image formation" refers to forming an image on a recording medium by applying a recording agent such as ink to the recording medium, and includes "recording", "printing", "printing", and the like. Hereinafter, the present invention will be described as having the same meaning.

In FIG. 1, reference numeral 101 denotes a cloth recording medium such as cotton, silk, nylon, or polyester. Reference numeral 102 denotes a payout roller for winding the recording medium 101 into a roll shape and mounting the roll. 103 is a printed recording medium 101
Is a take-up roller for taking up. Reference numeral 104 denotes a first print control unit, which is an inkjet head (1).
05 to 121).

Reference numerals 105 to 113 denote ink jet heads located on the upstream side of the conveyance path of the recording medium 101.
Reference numeral 105 denotes a first light magenta multi-nozzle head that discharges light magenta ink (hereinafter, referred to as a first light magenta head);
Reference numeral 106 denotes a first yellow multi-nozzle head (first yellow head) that discharges yellow ink, 107 denotes a first orange multi-nozzle head (first orange head) that discharges orange ink, and 108 denotes a first that discharges magenta ink. Reference numeral 109 denotes a first magenta multi-nozzle head (first magenta head);
, A first cyan multi-nozzle head (first cyan head) for discharging cyan ink, and a first blue multi-nozzle head (111) for discharging blue ink A first black multi-nozzle head (first black head) 112 for discharging black ink, and a dye ink 113 that does not dye the cloth and can be read using special light such as ultraviolet light. The first to discharge
Invisible color multi-nozzle head (first invisible color head)
It is. The recording agent discharged from this invisible color head is
For example, it contains a dye that can be read by irradiation of specific light, and contains a dye that cannot be visually recognized by human eyes under a normal use environment.

Reference numerals 114 to 122 denote the recording medium 101.
Downstream of the transport path of the inkjet head (105
To 113) are ink jet heads that are shifted by half from the width (band width) to be printed in one scan, and 114 is a second light magenta multi-nozzle head (hereinafter, referred to as a second light magenta multi-nozzle head) that discharges light magenta ink. A second yellow multi-nozzle head (second yellow head) 116 for discharging yellow ink;
Is a second orange multi-nozzle head (second orange head) that discharges orange ink, 117 is a second magenta multi-nozzle head (second magenta head) that discharges magenta ink, and 118 is a second nozzle that discharges light cyan ink. 2 light cyan multi-nozzle head (second light cyan head), 119 is a second cyan multi-nozzle head that discharges cyan ink (second cyan head), 120 is a second blue multi-nozzle head that discharges blue ink (Second blue head), 121 is a second black multi-nozzle head (second black head) that discharges black ink, and 122 is a dye ink that does not dye the cloth and can be read using special light such as ultraviolet light. Second to discharge
Invisible color multi-nozzle head (second invisible color head)
It is.

Reference numeral 123 denotes a first for transporting a recording medium.
As shown in the figure, the platen is stretched by a plurality of rollers, moves in the direction of arrow A, and conveys the recording medium 101 in the direction of arrow B by friction with the recording medium 101.
A dryer 124 dries the ink on the recording surface of the recording medium 101 immediately after printing. The dried recording medium 101 is folded back by the conveying means 145 (front and back reversing means), the conveying direction is reversed, and the above-described recording surface is on the lower side.

Reference numeral 125 denotes a second print control unit which performs print control by the ink jet heads (126 to 141). Reference numerals 126 to 133 denote ink jet heads located on the upstream side of the conveyance path of the recording medium 101, and reference numeral 126 denotes a third ink jetting light magenta ink.
Light yellow magenta multi-nozzle head (hereinafter referred to as third light magenta head) 127 is a third yellow multi-nozzle head (third yellow head) for discharging yellow ink,
128 is a third orange multi-nozzle head (third orange head) for discharging orange ink, 129 is a third magenta multi-nozzle head (third magenta head) for discharging magenta ink, and 130 is light cyan ink A third light cyan multi-nozzle head (third light cyan head), 131 is a third cyan multi-nozzle head (third cyan head) for discharging cyan ink, 13
Reference numeral 2 denotes a third blue multi-nozzle head that discharges blue ink (third blue head), and 133 denotes a third black multi-nozzle head that discharges black ink (third black head).

Reference numerals 134 to 141 denote the recording medium 101.
Downstream of the transport path of the inkjet head (126
133) are inkjet heads located at positions shifted by half with respect to the width (band width) of printing in one scan, and 134 is a fourth light magenta multi-nozzle head (hereinafter, referred to as a fourth light magenta multi-nozzle head) for discharging light magenta ink. 135 is a fourth yellow multi-nozzle head (fourth yellow head) for discharging yellow ink, and 136 is a fourth yellow multi-nozzle head for discharging yellow ink.
Is a fourth orange multi-nozzle head (fourth orange head) for discharging orange ink, 137 is a fourth magenta multi-nozzle head (fourth magenta head) for discharging magenta ink, and 138 is a fourth magenta head for discharging light cyan ink. Fourth light cyan multi-nozzle head (fourth light cyan head), 139 a fourth cyan multi-nozzle head (fourth cyan head) for discharging cyan ink, 140 a fourth blue multi-nozzle head for discharging blue ink Reference numeral 141 denotes a fourth black multi-nozzle head (fourth black head) for discharging black ink.

Reference numeral 142 denotes a second for transporting the recording medium.
As shown in the figure, the recording medium 101 is stretched by a plurality of rollers, moves in the direction of arrow C, and conveys the recording medium 101 in the direction of arrow D by friction with the recording medium 101.
A dryer 143 dries the ink on the recording surface of the recording medium 101 immediately after printing.

Reference numeral 144 denotes an optical area sensor for detecting, on the second platen 142, a discharge position of the dye ink printed by the first invisible color head 113 and the second invisible color head 122.

FIG. 2 is a block diagram for explaining a printing operation by the ink jet printer shown in FIG.
Here, the first print head 208, the second print head 209, the third print head 221 and the fourth print head 222 perform bidirectional printing.

Reference numeral 201 denotes a host computer for controlling the ink-jet printing system. Host computer 20
1 to GPIB (General Purpose I)
The print image data transferred via the (interface bus) interface is temporarily stored in the first frame memory 202. Double-sided positioning controller 203
According to a print start command issued from the host computer 201, the print image data corresponding to one main scanning width stored in the first frame memory 202 is sequentially converted via the first multi-value / binary conversion unit 204. The data is sequentially read out to the multi-scan unit 205. The sequential multi-scan unit 205 stores the first frame memory 20
2 is distributed to the first band memory 206 and the second band memory 207 and transmitted.

FIG. 3 is a diagram for explaining the printing process by the first print control unit 104 of the ink jet textile printing apparatus shown in FIGS.

Here, the first print head 208 connected to the first band memory 206 is located on the upstream side in the transport direction Y of the recording medium 101, and performs the first printing on the recording medium 101. . At the time of this printing, the first data sorted according to the sequential multi-scan is used.
Recording (printing) according to the recording data in the band memory 206
I do. Then, the recording medium 1 recorded by scanning in the forward direction Xa using all the ejection ports of the first print head 208
01 portion 301a is the discharge port array width L of the print head.
Is transported by a predetermined amount corresponding to the second print head 2
An area 301b corresponding to the recording area 09 is obtained. Printing is performed by the second print head 209 on the area 301b based on the remaining print data of the second band memory 207 distributed according to the multi-scan method. As described above, the first print head 208 and the second print head 209 are printed. The print position of the print head 209 is shifted from that of the print head 209 by half of the discharge port arrangement width L. For this reason, the second print head 209 uses the lower half of the discharge ports of the head, and the area 30 corresponding to the upper half of the area 301 b already recorded by the first print head 208.
2a is recorded by scanning in the backward direction Xb.

Next, when the recording medium 101 is conveyed by an amount corresponding to the ejection port arrangement width L, and the area 301b of the recording medium 101 becomes the area 301c, the ejection ports in the upper half of the second print head 209 are moved. Area 3c in the lower half of the area 301c recorded by the first print head 208
01b. As described above, the area recorded by the first print head 208 and the second print head 209 can be represented by reference numeral 302.

As described above, in this embodiment, each line of the area 302 is divided into the first print head 208 and the second print head 2 by employing the multi-scan method.
09 is formed by ink ejected from different ejection ports. That is, the recording data is transferred to the first and second print heads 208 and 209 by two times.
The recording is performed separately, and the areas to be recorded by the first print head 208 and the second print head 209 are different from each other such as the upper half and the lower half of each ejection port. Density unevenness, stripes, and the like caused by the aperture, the ejection direction, and the like can be dispersed. Then, the second print control unit 14
2, the same operation as described above is performed on the third print head 221 and the fourth print head 222.

FIG. 4 is a diagram showing a state 402 in which image data 401 printed by the ink jet textile printing apparatus shown in FIGS. 1 and 2 is divided into square tiles.
FIG. 4A shows an image 401 and reference numeral 40 in FIG.
Reference numeral 2 denotes a state where the image is divided on a tile.

A double-sided positioning controller 203 shown in FIG.
According to the print start command issued from the host computer 201, the print image data corresponding to one main scanning width stored in the first frame memory 202 is sequentially read out, and at the same time, the rectangular image stored in the tile shape memory 210 is read out. The tile division line 403 is superimposed on the image data 401 as invisible color data and transmitted to the sequential multi-scan unit 203. The square tile dividing line 403 is divided by the sequential multi-scan unit 203 into the first band memory 206 and the second band memory 20.
7 and are ejected from the first invisible color head 113 and the second invisible color head 122.

FIG. 5 shows how the distortion of the fabric generated when the recording medium 101 of the ink jet printing apparatus shown in FIGS. 1 and 2 passes through the conveying means 145 and is attached to the second platen 142 is corrected. FIG.

A double-sided positioning controller 203 shown in FIG.
According to the print start command issued from the host computer 201, the print image data corresponding to one main scanning area stored in the first frame memory 202 is stored in the first print control unit 104 (204, 20).
5,206,207) and the same 1
The print image data corresponding to the main scanning width is read into the second frame memory 211. A square tile dividing line 403 printed by the first print control unit 104
Is detected by the optical area sensor 144, and when the feature of the shape is confirmed by the tile shape detection unit 212, the tile number measurement unit 213 gives a processing number (n) to the detected tile and aligns both sides. It is sent to the control unit 203. At the same time, the deformation parameter creation unit 2
In 14, the coordinates 501 to 504 of the four corners of the unit tile of the tile shape memory 210 are compared with the coordinates 501 'to 504' of the detected four corners of the tile and another origin 502 having the coordinates of the first origin 501 as a reference origin. The correction value parameters 505 to 510, which are the amounts of deviation of the correction parameters 〜 to 504, are calculated and stored in the memory of the deformation parameter creation unit 214. FIG. 14 schematically shows a state where each parameter is stored in the memory. Each coordinate and correction value parameter are represented as follows.

First origin 501 in tile shape memory 210 = P1 First origin 501 ′ of detected tile = P1 ′ Second origin 502 in tile shape memory 210 = P2 Second origin 502 ′ of detected tile = P2 'Second origin main scanning direction correction value 505 = σX2n Second origin backward scanning direction correction value 506 = σY2n Third origin 503 in tile shape memory 210 = P3 Third origin 503' of detected tile = P3 ' Third origin main scanning direction correction value 507 = σX3n Third origin backward scanning direction correction value 508 = σY3n Fourth origin 504 = P4 in tile shape memory 210 Fourth origin 504 '= P4' fourth origin of detected tile Main scanning direction correction value 509 = σX4n Fourth origin backward scanning direction correction value 510 = σY4n

Thereafter, in the distortion correction section (215 to 217), the corresponding tile area read from the second frame memory 211 in accordance with the distortion correction processing (1) to (3) using the coordinates of the first origin as the reference origin. The positions of all the pixels in the pixel 601 are corrected, and a corrected tile area 801 is created.

Next, a description will be given of a distortion correction process based on deviation of each origin.

(1) Second Origin Correction Process (Distortion Correction Section A) FIG. 6 is a diagram showing the distortion due to the deviation of the second origin.
The distortion correction processing based on the deviation of the second origin will be described.

Referring to the tile shape information 601 in the tile shape memory 210, the correction coefficient α2 in the main scanning direction and the correction in the sub-scanning direction are determined based on the amount of deviation of the second origin 502 ′ from the third origin 503 on the diagonal. The coefficient β2 is calculated.

Α2 = (X2-X3 + σX2n) / (X2-X3) β2 = (Y2-Y3 + σY2n) / (Y2-Y3) From these correction coefficients, the coordinates p (x, y) of all the pixels in the tile shape memory 210 are obtained. ) To the corrected coordinates p ′ (x ′,
y ′).

X ′ = x × α2 y ′ = y × β2 From this, the second origin correction tile coordinate information 602 is obtained.

(2) Third Origin Correction Processing (Distortion Correction Unit B) FIG. 7 is a diagram showing distortion due to the deviation of the third origin. Hereinafter, the distortion correction processing due to the deviation of the third origin will be described.

Referring to the tile shape information 601 in the tile shape memory 210, the correction coefficient α3 in the main scanning direction and the correction in the sub-scanning direction are obtained from the amount of deviation of the third origin 503 ′ from the second origin 502 on the diagonal. The coefficient β3 is calculated.

Α3 = (X2-X3 + σX3n) / (X2-X3) β3 = (Y2-Y3 + σY3n) / (Y2-Y3) From these correction coefficients, the coordinates of all the pixels of the second origin correction tile coordinate information 602 are obtained. p ′ (x ′, y ′) is converted into corrected coordinates p ″ (x ″, y ″).

X ″ = x ′ × α3 y ″ = y ′ × β3 From this, the third origin correction processing tile coordinate information 701 is obtained.

(3) Fourth Origin Correction Process (Distortion Correction Unit C) FIG. 8 is a diagram showing distortion due to the fourth origin deviation, and the distortion correction process due to the fourth origin deviation will be described below.

Referring to the tile shape information 601 in the tile shape memory 210, the correction coefficient α4 in the main scanning direction and the correction in the sub-scanning direction are determined from the amount of deviation of the fourth origin 504 ′ from the first origin 501 on the diagonal. The coefficient β4 is calculated.

Α4 = (X4-X1 + σX4n) / (X4-X1) β4 = (Y4-Y1 + σY4n) / (Y4-Y1) From these correction coefficients, the coordinates of all the pixels of the third origin correction processing tile coordinate information 701 are obtained. p ″ (x ″, y ″) is converted into corrected coordinates p ″ ″ (x ″ ″, y ″ ″).

X ″ ′ = x ″ × α4 y ″ ′ = y ″ × β4 From this, the correction processing end tile 801 is obtained.

Next, the processing in the frame memory of the ink jet textile printing apparatus will be described with reference to FIG.

FIG. 9 is a diagram showing a state of processing in the third frame memory 216 of the ink jet textile printing apparatus shown in FIGS.

The third frame memory 218 stores the A area 90
1, a B area 902, and a C area 903, and have a capacity of one main scanning area × 3 times in total. A print start command is issued from the host computer 201,
When the double-sided registration control unit 203 detects the first tile (from the tile number measurement unit 213), the distortion correction unit (215 to 217) creates a corrected tile area 801 and places it in the B area 902 of the third frame memory 218. Then, the tile areas sequentially arranged are sequentially spread in the third frame memory 218 by setting the first origin position, which is the reference origin, as the second origin position of the previous arrangement tile area (FIG. 10). . At this time, the correction tile area 80
The first origin 501, which is the reference origin of 1, is provided with an offset 904 in the X direction, and prevents the subsequent correction tile area from going outside the leftmost print area. Further, in the Y direction, the upper end (A
Area 905), and even if the subsequent correction tile area 801 comes off to the upper end (area A side) (905), the A area 90
By starting printing from 1, an unprinted area is prevented. If all tile areas in one column in the X direction sequentially arranged reach the C area 903 beyond the B area 902 (606), the image data of the B area 902 is converted into the second multi-value / binary conversion unit 219. Are sequentially read out to the sequential multi-scan unit 218. Furthermore, the correction tile area 8 newly created by the distortion correction unit 215
01 is arranged in the C area 903 of the third frame memory 216, and the protruding area 907 at the lower end is located at the upper end 9 of the A area.
07 ′, if all tile areas in one column in the X direction that are sequentially arranged cover the A area 901, the C area 903
Is sent out. That is, every time image data for one main scanning area is transmitted, the transmission source (and storage area) is set to A.
→ B → C → A → B →.

The sequential multi-scan unit 220 sorts the print image data received from the third frame memory 218 to the third band memory 221 and the fourth band memory 222, and
3. Discharge from the fourth print head 224.

FIG. 11 shows the third print head 221 and the fourth print head 221.
7 shows a print image in which the distortion of a fabric printed by the print head 222 has been corrected. As shown in FIG.
The image on the back surface of the fabric by the recording agent provided by the third print head and the fourth print head is compared with the image on the surface of the fabric formed by the printing agent provided by the print head and the second print head. It is possible to record by superimposing precisely regardless of expansion and contraction.

Next, with reference to the flowchart shown in FIG. 24, the flow of the image forming process of this embodiment will be described.

First, when the process is started, in step S1, a rectangular tile-like dividing line 403 is formed on a cloth together with an image by the first recording means 104. In the following step S2, the cloth is conveyed to the second recording means 125 in a state where the cloth is turned upside down.
4, and the correction values 505 to 510 are calculated by determining the amount of distortion of the cloth that has been read and turned over. In the following step S4, a shape correction process is performed on the image area corresponding to the recording position of the detected square tile division line area 402 using the calculated correction values 505 to 510. Next, in step S5, since the images formed on the front and back sides of the fabric are the target mirror images on each of the front and back sides, the area 801 subjected to the shape correction processing is horizontally inverted, and the storage area 901 is filled until the recording area for one main scan is filled. 903 are sequentially arranged and stored in the storage area 9 by the second recording means in the subsequent step S6 with respect to the surface opposite to the surface on which the image is formed at the tip of the cloth.
An image is formed using the image data No. 02.

As described above, the dividing line is formed together with the image on the surface to be recorded first, and on the opposite surface, the distortion of the dividing line is determined, and the image data is corrected and recorded. Even if a position where an image is to be formed is shifted due to expansion and contraction of the fabric or the like, the image can be formed at an appropriate position by matching the image on the front and back.

In the processing shown in the flowchart of FIG. 24, first, a recording agent is applied to one of the front and back surfaces of a recording medium in accordance with image data to form an image.
While transporting the recording medium on which the image is formed, the amount of distortion of the transported recording medium, that is, the state of the transported recording medium, is determined, the image data is processed according to the determined result, and the image is recorded first. An image can be formed on a surface opposite to the imaged surface.

The image forming apparatus described in the present embodiment is an image forming apparatus for forming an image on a recording medium by using a recording head. It is constituted by a determination unit for determining the amount of distortion of the medium, that is, a state of the recording medium, and a processing unit for processing image data to be recorded according to the determination result. Form an image according to the image data, determine the state of the recording medium when transporting the recording medium, process the image data according to the determination result, for the surface opposite to the surface on which the image was previously formed,
The present invention is achieved by forming an image in accordance with processed image data.

As described above, with the configuration shown in this embodiment, an image is formed first on one of the front and back surfaces of the fabric, and the image formed earlier is formed on the other surface on the front and back surfaces. It is possible to form an aligned image, and it is possible to form an image that is precisely superimposed on both the front and back surfaces of the fabric regardless of the expansion and contraction of the fabric.

(Embodiment 2) Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 12 and FIG. 13 are structural sectional views showing a schematic structure of a full-color ink jet recording apparatus showing a second embodiment of the present invention. FIG. 12 shows a state in which printing is performed on the front side, and reference numeral 1202 denotes a feeding roller that winds and mounts the recording medium 101 in a roll shape. Also, 1
Reference numeral 203 denotes a print control unit which performs print control by the inkjet heads (1205 to 1221). Reference numeral 1204 denotes the printed recording medium 101,
A storage basket (storage unit) that collects the print start position 1201 while securing it.

Reference numerals 1205 to 1213 denote ink jet heads located on the upstream side of the transport path of the recording medium 101, and reference numeral 1205 denotes a first light magenta multi-nozzle head (hereinafter, referred to as a first light magenta head) for discharging light magenta ink. ) 1206, a first yellow multi-nozzle head (first yellow head) for ejecting yellow ink,
Reference numeral 07 denotes a first orange multi-nozzle head (first orange head) that discharges orange ink, 1208 denotes a first magenta multi-nozzle head (first magenta head) that discharges magenta ink, and 1209 discharges light cyan ink. A first light cyan multi-nozzle head (first light cyan head) 1210 is a first cyan multi-nozzle head (first cyan head) for discharging cyan ink,
1211 is a first blue multi-nozzle head (first blue head) for discharging blue ink, 1212 is a first black multi-nozzle head (first black head) for discharging black ink, 1213 is not dyed on cloth, This is a first invisible color multi-nozzle head (first invisible color head) that discharges dye ink that can be read using special light such as ultraviolet light.

Reference numerals 1214 to 1222 denote recording medium 1
01 on the downstream side of the transport path of the inkjet head (1).
205 to 1213) are ink jet heads that are shifted by half from the width (band width) to be printed in one scan, and 1214 is a second ink jet head for discharging light magenta ink.
A second light magenta multi-nozzle head (hereinafter referred to as a second light magenta head),
Reference numeral 1216 denotes a second orange multi-nozzle head (second orange head) for ejecting orange ink,
Reference numeral 17 denotes a second magenta multi-nozzle head (second magenta head) that discharges magenta ink, 1218 denotes a second light cyan multi-nozzle head (second light cyan head) that discharges light cyan ink, and 1219 denotes a cyan ink. A second cyan multi-nozzle head (second cyan head) 1212 for discharging blue is a second blue multi-nozzle head (second blue head) 122 for discharging blue ink.
Reference numeral 1 denotes a second black multi-nozzle head (second black head) that discharges black ink, and 1222 denotes a second invisible color multi head that discharges a dye ink that is not dyed on cloth and can be read using special light such as ultraviolet light. This is a nozzle head (second invisible color head).

Reference numeral 1223 denotes a platen for transporting the recording medium, which is stretched by a plurality of rollers as shown in the figure, moves in the direction of arrow A, and moves the recording medium 101 in the direction of arrow B by friction with the recording medium 101. Transported to 1
A dryer 224 dries the ink on the recording surface of the recording medium 101 immediately after printing.

FIG. 13 is a diagram showing a state of printing on the back side. The recording medium 101 is attached to the platen 1223 with the back surface facing upward via the feeding roller 1301 of the storage basket 1204. Platen 1223 has arrow C
The recording medium 101 is transported in the direction of arrow D by moving in the direction of FIG. 1302 denotes a first invisible color head 1213 and a second invisible color head 1
An optical area sensor for detecting the discharge position of the dye ink printed by the printhead 222 on the platen 1223. In the print control unit 1304 when printing on the back surface, 1214 to 1222 are on the upstream side of the recording medium 101 on the transport path, and 1205 to 121 are on the downstream side of the recording medium 101 on the transport path. Further, the first invisible color multi-nozzle head 1213 and the second invisible color multi-nozzle head 1222 are not used. 1303
Is a dryer for drying the ink on the recording surface of the recording medium 101 immediately after printing. Reference numeral 1304 denotes a take-up roller for taking up a printed image.

According to the present embodiment, as shown in the block diagram of FIG. 15, the image on the surface of the fabric formed by the recording agent applied by the first print head and the second print head is again subjected to the second printing. (2) The image on the back surface of the fabric by the printing agent applied in the order of the two print heads and the first print head is precisely superimposed and recorded by only one print control unit 1304 irrespective of the expansion and contraction of the fabric. Can be.

(Embodiment 3) Next, a third embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 16 shows a square tile dividing line 1602 and tile information 1603 by an invisible color multi-nozzle head which is printed over image data 1601 printed by a full-color ink jet printing apparatus according to the third embodiment of the present invention. FIG.

According to the present embodiment, the absolute position of a tile on a recording medium can be read by recording information 1602 according to a barcode on each tile and detecting this by the optical area sensor 144. Therefore, even if the apparatus stops due to an unexpected reason or the like and the count information of the tile number measurement unit 213 is lost, the backside positioning operation can be restarted when the printing operation is restarted. That is, the operation rate of the apparatus is increased, and as a result, the cost of the product to be printed can be reduced.

(Embodiment 4) FIG. 17 is a block diagram for explaining a printing operation of an ink jet printer according to a fourth embodiment. FIG. 18 shows a state 1 in which image data 1801 printed by an ink-jet printing apparatus is divided into triangular tiles according to the fourth embodiment.
FIG. Incidentally, a structural sectional view showing a schematic configuration is the same as that of FIG. 1 which is the first embodiment of the present invention. The double-sided registration control unit 1703 according to the fourth embodiment sequentially reads out print image data equivalent to one main scanning width stored in the first frame memory 1702 according to a print start command issued from the host computer 1701. The triangular tile dividing line 1803 stored in the tile shape memory 1710 is superimposed on the image data 1801 as invisible color data and transmitted to the sequential multi-scan unit 1703.

FIG. 19 shows how the distortion of the fabric generated when the recording medium 101 of the ink jet textile printing apparatus according to the fourth embodiment is pasted on the second platen 142 through the conveying means 145 is corrected. FIG.

The double-sided registration control unit 1703 converts the print image data corresponding to one main scanning area stored in the first frame memory 1702 into the first print control unit in accordance with the print start command issued from the host computer 1701. 104 (1704, 1705,
1706, 1707) and the same 1
The print image data corresponding to the main scanning width is read into the second frame memory 1711. Triangle tile division line 18 printed by first print control unit 104
03 is detected by the optical area sensor 144, and when the feature of the shape is confirmed by the tile shape detection unit 1712, the tile number measurement unit 1713 gives the detected tile a processing number (n), Adjustment control unit 17
03 is sent. At the same time, the deformed parameter creating unit 1714 uses the coordinates of the detected three corners 1901 ′ to 1903 ′ of the detected tile and the coordinates of the first origin 1901 with respect to the coordinates of the three corners 1901 to 1903 of the unit tile in the tile shape memory 1710 as the reference origin. And the other origin 190
Correction value parameter 19 which is the amount of deviation between 2 and 1903
04 to 1907 are calculated and stored in the memory in the deformation parameter creation unit 1714. FIG. 19 shows an odd-numbered unit tile area detected. Each coordinate and correction value parameter are represented as follows.

First origin 1901 ′ in tile shape memory 1710 = P1 First origin 1901 ′ = P1 ′ of detected tile Second origin 1902 = P2 in tile shape memory 1710 Second origin 1902 ′ of detected tile = P2 'Second origin main scanning direction correction value 1904 = σX2n Second origin backward scanning direction correction value 1905 = σY2n Third origin 1903 in tile shape memory 1710 = P3 Third origin 1903' of detected tile = P3 ' Third origin main scanning direction correction value 1906 = σX3n Third origin backward scanning direction correction value 1907 = σY3n

Thereafter, the distortion correction unit (1715, 171)
6) In the second frame memory 1 according to the distortion correction processes (1) and (2) using the coordinates of the first origin as the reference origin.
The position of all the pixels in the corresponding tile area 2001 read from 711 is corrected, and a corrected tile area 2101 is created.

Next, a description will be given of a distortion correction process based on deviation of each origin.

(1) Second Origin Correction Process (Distortion Correction Section D) FIG. 20 is a diagram showing distortion due to the deviation of the second origin. Hereinafter, the distortion correction process due to the deviation of the second origin will be described.

Referring to the tile shape information 2001 in the tile shape memory 1710, the second
From the displacement amount of the origin 1902 ', the correction coefficient α in the main scanning direction
4 and a correction coefficient β4 in the sub-scanning direction are calculated.

Α4 = (X2-X3 + σX2n) / (X2-X3) β4 = (Y2-Y3 + σY2n) / (Y2-Y3) From these correction coefficients, the coordinates p (x, y) of all the pixels in the tile shape memory 1710 are obtained. ) To the corrected coordinates p ′ (x ′,
y ').

X ′ = x × α4 y ′ = y × β4 From this, the second origin correction tile coordinate information 2002 is obtained.

(2) Third Origin Correction Process (Distortion Correction Unit E) FIG. 21 is a diagram showing the distortion due to the deviation of the third origin, and the distortion correction process by the deviation of the third origin will be described below.

Referring to the tile shape information 2001 in the tile shape memory 1710, the third origin 1902
The correction coefficient α in the main scanning direction is obtained from the displacement amount of the origin 1903 ′
5 and a correction coefficient β5 in the sub-scanning direction are calculated.

Α5 = (X2-X3 + σX3n) / (X2-X3) β5 = (Y2-Y3 + σY3n) / (Y2-Y3) From these correction coefficients, the coordinates of all the pixels of the second origin correction tile coordinate information 2002 are calculated. p ′ (x ′, y ′) is
It is converted into the corrected coordinates p ″ (x ″, y ″).

X ″ = x ′ × α5 y ″ = y ′ × β5 From this, third origin correction processing tile coordinate information 2101 is obtained.

FIG. 22 is a diagram showing how to correct the distortion of the cloth in the unit tile area detected at the even-numbered number. 22
01 is the first origin of the even-numbered tile detected, 220
Reference numeral 2 denotes a second origin of the detected tile, 2203 denotes a third origin of the detected tile, and the same processing as the above-described distortion correction of the odd-numbered detected unit tile area is executed.

Next, the processing in the frame memory of the ink jet textile printing apparatus will be described with reference to FIG.

FIG. 23 is a diagram showing a state of processing in the third frame memory 1717 of the ink jet textile printing apparatus according to the fourth embodiment.

The third frame memory 1717 stores the A area 23
01, B area 2302, and C area 2303,
In total, it has a capacity of one main scanning area × 3 times. When a print start command is issued from the host computer 1701 and the double-sided registration control unit 1703 detects the first tile (from the tile number measurement unit 1713),
The correction tile area 2101 is created by the distortion correction unit (1715 to 1716), and the
It is arranged in the area 2302. At this time, the correction tile area 2
The first origin 1901 which is the reference origin of 101 is provided with an offset 2304 in the X direction, and prevents the subsequent correction tile area from going outside the leftmost print area. Further, the Y direction is set at the upper end (area A side) of the B area 2302, and even if the subsequent correction tile area 2301 comes off the upper end (area A side) (230)
5) By starting printing from the A area 2301,
Prevents unprinted areas.

Thereafter, the tile areas sequentially arranged are successively spread in the third frame memory 1717 as follows. (A) Regarding the unit tile area detected even-numbered, the vertex of the triangle facing the tile area of the triangle detected immediately before is set as the reference origin. (B) For the odd-numbered unit tile area, the second origin position, which is the triangular tile area detected immediately before, is set as the reference origin.

If the tile areas in one column in the X direction arranged sequentially exceed the B area 2302 and reach the C area 2303 (2306), the image data of the B area 2302 is converted into the second multi-valued / binary image data. The data is sequentially read out to the sequential multi-scan unit 1719 via the conversion unit 1718.
Further, the correction tile area 2101 newly created by the distortion correction units 215 and 216 is stored in the third frame memory 1.
717, the protruding area 2307 at the lower end is stored in the upper end 2307 'of the A area, and the tile areas arranged in one column in the X direction in the A area 23
If it is 01, the image data of the C area 2303 is transmitted. That is, every time image data for one main scanning area is transmitted, the transmission source (and storage area) is changed from A → B → C → A → B
→ Switch to.

The sequential multi-scan unit 1719
Then, the print image data received from the third frame memory 1717 is distributed to the third band memory 1720 and the fourth band memory 2721, and the ejection is performed from the third print head 1722 and the fourth print head 2723, respectively.

As described above, with the configuration shown in the present embodiment, an image is formed first on one of the front and back surfaces of the fabric, and the image formed earlier is formed on the other surface on the front and back surfaces. It is possible to form an aligned image, and to form an image precisely superimposed on both the front and back surfaces of the fabric regardless of the expansion and contraction of the fabric.

(Other Embodiments) In the above-described embodiments of the present invention, a discharge system using an electrothermal converter for applying thermal energy to a liquid will be described as an example of a structure for discharging a liquid. However, the present invention is not limited to this, and can be applied even if a conventionally known ejection method is adopted. As another ejection method, a method is known in which a piezo element is used as an electromechanical conversion element that applies mechanical pressure as ejection energy, and a droplet-shaped liquid is ejected by the generated pressure.

The present invention provides an excellent effect particularly in a recording apparatus using a so-called bubble jet type recording head, which performs recording by forming flying droplets using thermal energy among ink jet recording methods. It is.

The typical configuration and principle are described in, for example, US Pat. Nos. 4,723,129 and 4,740.
It is preferable to use the basic principle disclosed in the specification of Japanese Patent No. 796. This method is a so-called on-demand type,
Although it can be applied to any type of continuous type, in particular, in the case of the on-demand type, it can be applied to a sheet holding liquid (ink) or an electrothermal converter arranged corresponding to the liquid path. By applying at least one drive signal corresponding to recording information and giving a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal transducer, and film boiling occurs on the heat acting surface of the recording head. Liquid (ink) corresponding to the drive signal
This is effective because air bubbles in the interior can be formed. By discharging the liquid (ink) through the discharge opening by the growth and contraction of the bubble, at least one droplet is formed. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that the ejection of a liquid (ink) having particularly excellent responsiveness can be achieved, which is more preferable. As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 relating to the temperature rise rate of the heat acting surface are adopted, more excellent recording can be performed.

In addition, even in the case of the serial type as described above, the recording head fixed to the apparatus main body or the electric connection with the apparatus main body or the ink from the apparatus main body is attached to the apparatus main body by being attached to the apparatus main body. The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is provided integrally with the recording head itself is used.

Further, the present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium on which a recording apparatus can record. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads, or a configuration as a single recording head that is integrally formed.

It is preferable to add recovery means for the printhead, preliminary auxiliary means, and the like provided as components of the printing apparatus of the present invention since the effects of the present invention can be further stabilized. . If these are specifically mentioned, capping means for the recording head, cleaning means, pressurizing or suction means, preheating means using an electrothermal transducer or another heating element or a combination thereof, and printing Performing a preliminary ejection mode for performing another ejection is also effective for performing stable printing.

Further, the types and the number of the recording heads to be mounted are different from each other in the configuration having one recording head corresponding to a single color and the recording colors and densities described in the above embodiments. The present invention can be applied to any one of two or more inks corresponding to a plurality of inks.

In addition, in the embodiments of the present invention described above, the ink is described as a liquid. However, an ink which solidifies at room temperature or lower and which softens or liquefies at room temperature may be used. In general, the ink jet method generally controls the temperature of the ink itself within a range of 30 ° C. or more and 70 ° C. or less to control the temperature so that the viscosity of the ink is in a stable ejection range. Sometimes, the ink may be in a liquid state. In addition, in order to positively prevent temperature rise due to thermal energy by using it as energy for changing the state of the ink from a solid state to a liquid state, or to prevent evaporation of the ink, the ink is solidified in a standing state and heated. May be used. In any case, the application of heat energy causes the ink to be liquefied by the application of the heat energy according to the recording signal and the liquid ink to be ejected, or to start solidifying when it reaches the recording medium. The present invention is also applicable to a case where an ink having a property of liquefying for the first time is used. In such a case, the ink
JP-A-54-56847 or JP-A-60-7
As described in Japanese Patent Publication No. 1260, it is also possible to adopt a form in which the sheet is opposed to the electrothermal converter in a state where it is held as a liquid or solid substance in the concave portion or through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, the form of the ink jet recording apparatus of the present invention is not only used as an image output terminal of an information processing apparatus such as a computer, but also for a copying apparatus combined with a reader or the like and a facsimile apparatus having a transmission / reception function. It may take a form.

[0118]

As described above, according to the present invention,
An image for determining the distortion of the recording medium is formed together with the image on the front surface of the recording medium, and then the distortion of the recording medium is determined on the back surface of the recording medium to correct the image and formed on the back surface. Since the image is formed as a mirror image which is bilaterally symmetrical with respect to the transport direction, it is possible to form a clear image that matches on the front and back surfaces. In particular, when a recording medium having elasticity such as cloth is used, precise overlay recording can be realized by correcting the distortion of the cloth that occurs during conveyance. In addition, even in the case of performing textile printing by the ink jet method,
It is possible to form an image that realizes a sufficient strike-through on the cloth, and thus it can be used as an apparatus suitable for printing.

Further, the number of recording heads constituting each of the first recording means for forming an image on the front surface of the cloth and the second recording means for forming an image on the back surface is set to a maximum of two steps. The productivity can be improved by reducing the number of overstrikes, and an inexpensive apparatus can be obtained by reducing the number of heads.

Further, according to the present invention, the number of pipeline processing stages of the distortion correction unit is reduced (three stages to two stages), and an inexpensive apparatus configuration is used to precisely record superimposed images without depending on the expansion and contraction of the fabric. Can be realized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a schematic configuration of a full-color inkjet printing apparatus to which the present invention can be applied.

FIG. 2 is a block diagram showing a flow of image data processing in the full-color ink jet textile printing apparatus shown in FIG.

FIG. 3 is a diagram illustrating a sequential program according to an embodiment of the present invention;
FIG. 4 is an explanatory diagram showing a recording method by multi-scan.

FIG. 4 is a diagram showing a state in which image data printed by a full-color ink jet textile printing apparatus according to an embodiment of the present invention is divided into square tiles.

FIG. 5 is a diagram showing a state of correcting a distortion of a fabric generated on a recording medium according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating a correction process of a distortion correction unit according to the embodiment of the present invention.

FIG. 7 is a diagram illustrating a correction process of a distortion correction unit according to the embodiment of the present invention.

FIG. 8 is a diagram illustrating a correction process of a distortion correction unit according to the embodiment of the present invention.

FIG. 9 is a diagram illustrating processing of a frame memory according to the embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating a tile divided image arranged in a frame memory according to the embodiment of the present invention.

FIG. 11 is a diagram showing a print image in which distortion of a cloth has been corrected in the embodiment of the present invention.

FIG. 12 is a cross-sectional view illustrating a schematic configuration of a full-color ink jet textile printing apparatus according to Embodiment 2 of the present invention and an operation during surface recording.

FIG. 13 is a cross-sectional view illustrating a schematic configuration of a full-color ink jet textile printing apparatus according to Embodiment 2 of the present invention and an operation during backside recording.

FIG. 14 is a diagram illustrating data stored in a memory in a deformation parameter creation unit according to the embodiment of the present invention.

FIG. 15 is a block diagram illustrating a flow of image data processing in Embodiment 2 of the present invention.

FIG. 16 is a diagram illustrating a state in which image data to be printed is divided into rectangular tiles and barcode information according to a third embodiment of the present invention.

FIG. 17 is a block diagram illustrating a flow of image data processing in Embodiment 4 of the present invention.

FIG. 18 is a diagram illustrating a state in which image data to be printed is divided into triangular tiles according to the embodiment of the present invention.

FIG. 19 is a diagram illustrating a process for correcting a distortion of a cloth according to the fourth embodiment of the present invention.

FIG. 20 is a diagram illustrating a distortion correction process according to a fourth embodiment of the present invention.

FIG. 21 is a diagram illustrating a distortion correction process according to a fourth embodiment of the present invention.

FIG. 22 is a diagram illustrating a process of correcting a distortion of a cloth according to Embodiment 4 of the present invention.

FIG. 23 is a diagram illustrating processing of a three-frame memory according to a fourth embodiment of the present invention.

FIG. 24 is a flowchart illustrating a flow of an image forming process according to the embodiment of the present invention.

[Explanation of symbols]

101 Recording Medium 104, 125 Recording Means 105-122, 126-141 Inkjet Print Head 123, 142 Transport Means 144, 1302 Optical Area Sensor 145 Front / Back Inverting Means 201, 1501, 1701 Host Computer 202, 1502, 1702 First Frame Memory 203, 1503, 1703 Double-sided alignment control unit 205, 220, 1705 Sequential multi-scan unit 206, 1506, 1706 First band memory 207, 1507, 1707 Second band memory 208, 1508, 1708 First print head 209, 1509 , 1709 Second print head 210, 1510, 1710 Tile shape memory 211, 1511, 1711 Second frame memory 212, 1512, 1712 Yl shape detection unit 213,1513,1713 tile number measuring unit 214,1514,1714 Diforume parameter generation unit 215～217,1515～1517,1715～17
16 distortion correction units 218, 1518, 1717 third frame memory 221, 1720 third band memory 222, 1721 fourth band memory 223, 1722 third print head 224, 1723 fourth print head 401, 1801 print image data 402, 1602 Tile area 403, 1803 Tile dividing lines 501-504, 1901-1903 Origin of unit tile 505-510, 1904-1907 Origin correction value 1203 Print control unit 1205-1222 Ink-jet print head 1603 Barcode information 2001 Tile shape information 2002 Tile coordinate information 2201 to 2203 Origin of detected unit tile

Claims (31)

[Claims] A first recording unit that is provided at a position facing the surface of the recording medium and that applies a recording agent onto the surface of the recording medium by a recording head to form a surface image; The first transported to the first recording means
Conveying means, a second recording means provided at a position opposing the back surface of the recording medium, and applying a recording agent on the back surface of the recording medium by a recording head to form a surface image; and the first conveying means. A second transport unit provided on an extension of the transport path of the first transport unit and transporting the recording medium transported from the first transport unit to the second recording unit; and a surface of the recording medium by the first recording unit. And a double-sided position control means for performing image position adjustment so that the back side image formed on the back side of the recording medium by the second recording means is aligned with the front side image to be formed. An image forming apparatus comprising: 2. The method according to claim 1, wherein the first recording unit uses a recording agent containing a dye that can be read by irradiation of specific light to form a dividing line that divides an image corresponding to an image formed on a surface into rectangular tiles. The image forming apparatus according to claim 1, further comprising a tile division line printing unit that prints the image along with image data corresponding to an image to be formed on the front surface. 3. A dye capable of reading, by irradiating a specific light, a dividing line for dividing an image formed on a surface into rectangular tiles and information indicating an area divided by the dividing line. 3. The image forming apparatus according to claim 1, further comprising a tile information printing unit that prints together with image data corresponding to an image to be formed on the front surface using a recording agent including: 4. The tile dividing line printing means prints a dividing line for dividing an image formed on a surface into triangular tiles together with image data corresponding to an image formed on the surface. Or the image forming apparatus according to 3. 5. The recording agent according to claim 2, wherein the recording agent used for forming the dividing line contains a dye which is not dyed on a cloth and which can be erased in a post-process after printing. Image forming device. 6. A table for turning the recording medium on which the front image is formed, which is conveyed from the first conveying means, on which the recording medium is turned upside down and facing the second conveying means. 2. The method according to claim 1, wherein the reverse transport is performed.
6. The image forming apparatus according to any one of claims 1 to 5, 7. The apparatus according to claim 1, further comprising a drying unit for drying the recording agent immediately after the recording agent is applied on the surface of the recording medium by the first recording unit. An image forming apparatus according to any one of the above. 8. A tile dividing line detecting unit provided on the second transporting unit and reading the tile dividing line prior to the back side printing by the second recording unit, and detected by the tile dividing line detecting unit. 8. The image forming apparatus according to claim 1, further comprising a back side print area determining unit that determines back side print image data corresponding to the tile area. 9. A double-sided position correction control unit configured to deform the back side print image data corresponding to the tile area in accordance with the distortion of the tile outline surrounded by the read division line, 9. The image forming apparatus according to claim 1, further comprising: a distortion correction image storage unit configured to store the deformed image data of the tile area in an image memory area. 10. The second recording unit cuts out the distortion-corrected image storage unit according to a print width and a print position, and matches the cut-out image data with a tile area detected by the tile division line detection unit. The image forming apparatus according to any one of claims 1 to 9, further comprising a distortion correction image reading unit that matches images on the front and back surfaces of the image to be printed. 11. The image formed by the second recording means is an image obtained by converting the image formed by the first recording means into a mirror image symmetrical to the left and right with the conveyance direction of the recording medium as an axis. Claims 1 to 10
The image forming apparatus according to any one of the above. 12. The image forming apparatus according to claim 1, wherein the first recording unit and the second recording unit form an image on a recording medium by an inkjet head that forms an image by discharging ink. An image forming apparatus according to any one of claims 11 to 13. 13. The inkjet head has an electrothermal converter for applying thermal energy to the ink,
13. The image forming apparatus according to claim 12, wherein bubbles are generated in the ink by the electrothermal transducer to discharge the ink. 14. The image forming apparatus according to claim 1, wherein the recording medium is a cloth. 15. A conveying means for conveying a recording medium, provided opposite to a surface of the recording medium conveyed by the conveying means, and applying a recording agent onto the surface of the recording medium by a recording head to form a surface image. Recording means for forming
A recording medium storage means provided on an extension path of the conveyance means, for temporarily storing the recording medium from the conveyance means while holding a recording start position, and recording the recording medium stored in the recording medium storage means A recording medium reversing / conveying means for conveying the back side of the recording medium conveyed from a start position to face the recording means, a back side image creating means for sending image data reversed in a conveying direction to the recording means, and the recording Double-sided positioning for performing double-sided positioning so that a back side image formed on the back side of the recording medium is formed in conformity with a front side image formed on the front side of the recording medium conveyed by the medium reversing conveyance unit. An image forming apparatus comprising: a control unit. 16. The recording device according to claim 1, wherein the dividing unit divides an image corresponding to the image formed on the surface into rectangular tiles.
The tile dividing line printing means for printing together with image data corresponding to an image formed on the surface using a recording agent containing a dye which can be read by irradiation of specific light, according to claim 15, further comprising: Image forming device. 17. The recording means includes a dye which can read, by irradiating a specific light, a dividing line for dividing an image formed on the surface into rectangular tiles and information indicating an area divided by the dividing line. 17. The image forming apparatus according to claim 15, further comprising a tile information printing unit that prints together with image data corresponding to an image to be formed on the surface using a recording agent. 18. The tile dividing line printing unit prints a dividing line for dividing an image formed on a surface into triangular tiles, together with image data corresponding to an image formed on the surface. Or an image forming apparatus according to item 17. 19. The recording agent according to claim 16, wherein the recording agent used for forming the dividing line contains a dye which is not dyed on a cloth and can be erased in a post-process after printing. Image forming device. 20. The printing apparatus according to claim 1, further comprising a drying unit that dries the recording agent immediately after the recording unit applies the recording agent on the surface of the recording medium.
20. The image forming apparatus according to any one of 5 to 19. 21. A tile dividing line detecting means provided on a transport system of a recording medium by the transporting means and reading the tile dividing line before printing the back side by the recording means, and detecting by the tile dividing line detecting means. 21. The image forming apparatus according to claim 15, further comprising a back side print area determining unit that determines back side print image data corresponding to the selected tile area. 22. A double-sided position correction control unit configured to deform the back side print image data corresponding to the tile area in accordance with the distortion of the tile outline surrounded by the read division line, 22. The image forming apparatus according to claim 15, further comprising: a distortion correction image storage unit that refills the deformed image data of the tile area in the image memory area. 23. The recording unit cuts out the distortion-corrected image storage unit in accordance with a print width and a print position, and prints the cut-out image data in accordance with a tile area detected by the tile division line detection unit. 23. The image forming apparatus according to claim 15, further comprising a distortion-corrected image reading unit that matches the images on the front and back surfaces. 24. An image formed on the back surface of the recording medium, wherein the image formed on the front surface of the recording medium is an image obtained by converting the image formed on the front surface of the recording medium into a mirror image symmetrical with respect to the conveyance direction of the recording medium. An image forming apparatus according to any one of claims 15 to 23. 25. The image forming apparatus according to claim 15, wherein the recording unit forms an image using an ink jet recording head that performs recording by discharging ink. 26. The ink jet head, which is a recording head that discharges ink using thermal energy, includes a thermal energy conversion element for generating thermal energy to be applied to the ink. Item 29. The image forming apparatus according to Item 25. 27. The image forming apparatus according to claim 15, wherein said recording medium is a cloth. 28. An image forming method in which a recording agent is applied to a recording medium to form an image on the recording medium, wherein the recording agent is applied to one of the front and back surfaces of the recording medium in accordance with image data to form an image. A first image forming step of forming, a transporting step of transporting the recording medium on which an image is formed in the first image forming step, and a determining step of determining a state of the recording medium transported in the transporting step A processing step of processing the image data in accordance with the determination result of the determination step; and, in accordance with the image data processed in the processing step, a surface opposite to a surface on which an image is formed in the first image forming step A second image forming step of forming an image by applying a recording agent to the image forming step. 29. The image forming apparatus according to claim 28, wherein in the first image forming step and the second image forming step, an image is formed on the recording medium using an ink jet head for discharging ink. Image forming method. 30. The ink jet head, which discharges ink using thermal energy, includes a thermal energy conversion element for generating thermal energy applied to the ink. Item 30. The image forming method according to Item 29. 31. An image forming apparatus for forming an image on a recording medium by using a recording head, a conveying means for conveying the recording medium, a judging means for judging a state of the conveyed recording medium, and recording according to the judgment result. Processing means for processing image data to be processed, and, on one of the front and back surfaces of the recording medium, forming an image by the recording head in accordance with the image data; and The state of the recording medium when conveyed by the conveyance unit is determined by the determination unit, and the recording is performed on the surface opposite to the surface on which the image is formed, according to the image data processed by the processing unit according to the determination result. An image forming apparatus comprising: a recording control unit that forms an image with a head.