JP2000218891A - Image recorder and recording control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize correction during image recording even when image recording is performed using a plurality of recording heads by printing specified marks on the surface and back face of a recording sheet, respectively, using different print heads and then confirming and correcting the recording start position and the carrying speed with reference to the marks through use of a recording sensor. SOLUTION: Carrying rollers 50a, b; 51a, b, c; 52a, b are driven, respectively, through Ma motor 17, Mb motor 18 and Mf motor 22 and nip rollers 53, 54, 55 are driven through Mc, Md, Me nip motors 19, 20, 21. A reference position sensor 7 detects entering of a recording sheet 100 into a reference position, nip detection sensors 8-10 detect nipping state of the nip rollers 53-55, and record confirming sensor 11, 12 detect marks printed by print heads 15, 16. A corresponding recording head 13, 14, 15, 16 receives a recording signal and performs printing on the surface and back of the recording sheet. A developing section 60 develops the record content and a control section detects and corrects the recording start position and the carrying speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording control method and an image recording method for an image recording apparatus for automatically correcting an error in a recording start position due to a mounting error of a recording head and a manufacturing error of a roller, and a variation in a conveying speed of a recording sheet. It relates to a recording device.

[0002]

2. Description of the Related Art A conventional recording control method of an image recording apparatus is disclosed, for example, in Japanese Patent Application Laid-Open No. 3-42264. In this conventional technique, a mark is recorded in a margin of a recording sheet by a recording head when an image is recorded, and a position P1 of the moved mark is detected by a sensor when the recording sheet is conveyed, whereby a mark relative to a regular position P0 is obtained. The deviation E is obtained, and based on the deviation E, the print dot use range T1 of the recording head is changed by the deviation E to perform feedback control of the recording position.

[0003]

However, in the recording control method of the conventional image recording apparatus as described above, a mark is recorded in a margin of recording paper by a recording head when recording an image. Therefore, when recording an image on the entire surface (the entirety) of a recording sheet where there is no (or almost no) margin on the recording sheet, the recording position of the recording head is corrected while recording the image by the recording head. Can not do.

In the above-described conventional recording control method of an image recording apparatus, the position of a mark is simply detected to correct the recording position of a recording head. The change in the conveyance speed of the recording paper cannot be corrected, and the change in the conveyance speed causes image unevenness. In particular, in an image recording apparatus having a plurality of recording heads arranged in the transport direction, a plurality of rollers are required, and the transport speed changes depending on the accuracy of the plurality of rollers.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. Even when an image is recorded by a plurality of recording heads, the recording start positions of the plurality of recording heads and the conveyance speed of the recording paper are controlled. An object of the present invention is to provide a recording control method and an image recording apparatus for an image recording apparatus, which can surely correct the image and realize the above correction during image recording.

[0006]

According to a first aspect of the present invention, there is provided a recording control method for an image recording apparatus, wherein a plurality of recording heads record an image on a surface of a recording sheet and a plurality of printing pairs forming a pair with the plurality of recording heads. One of the print heads prints linear marks at predetermined intervals on the back of the recording paper, and the print heads other than the one print head are the same as the one print head on the back of the recording paper. At a timing, a line mark at a predetermined interval is printed. From the two line marks, the recording confirmation sensor confirms the recording start positions of the plurality of print heads and the transport speeds of the plurality of transport units. The correcting means corrects the recording start positions of the plurality of print heads and the plurality of recording heads and the transport speed of the plurality of transport means based on the confirmed information.

According to a second aspect of the present invention, there is provided an image recording apparatus, wherein the correction means corrects the recording start positions of the plurality of print heads and the plurality of recording heads and corrects the transport speed of the plurality of transport means. This is performed in units of a line for scanning a plurality of print heads and a plurality of recording heads.

According to a third aspect of the invention, there is provided a recording control method for an image recording apparatus, in which one recording confirmation sensor confirms printing of one line of marks printed by a plurality of print heads.

According to a fourth aspect of the present invention, there is provided an image recording apparatus comprising: a plurality of recording heads for recording an image on the surface of a recording sheet; A plurality of print heads that print line-shaped marks at predetermined intervals on the back surface of the recording paper, and a plurality of recording heads that are arranged before and after the plurality of recording heads and the transport direction of the print heads to press and transport the recording paper. Transport means, a recording confirmation sensor that confirms a linear mark at a predetermined interval printed by a plurality of print heads, and a recording start position of the plurality of recording heads and the print head based on the mark confirmed by the recording confirmation sensor. Correction means for correcting the transport speed of the plurality of transport means.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a configuration of an image recording apparatus according to Embodiment 1 of the present invention. In FIG. 1, a control unit 1 controls operations such as setting of reference parameters, image / mark printing, mark reading, correction of a recording start position / conveyance speed, and development. The reference parameter set by the control unit 1 includes a reference value of the LINE synchronization cycle of the line synchronization signal 40 generated by the line synchronization signal generation circuit 2 and the recording start signal generation circuit 3 sets the recording start signals 41 and 42 and the nip start signal This is a reference value for the timing of generating 43 to 45.

The line synchronizing signal generating circuit 2 generates a line synchronizing signal 40 for synchronizing the operations of the recording start signal generating circuit 3, the recording circuit 4 and the printing circuit 5. The line synchronization signal 40 is a pulse signal having a predetermined cycle, and the predetermined cycle of the pulse signal is a LINE synchronization cycle. L
The INE synchronization cycle is set by control data 31 from the control unit 1 and a data set signal 32.

The recording start signal generation circuit 3 counts the number of pulses of the line synchronizing signal 40 and records the recording paper (10 in FIG. 2).
0), the recording start signals 41 and 42 are output to the recording circuit 4 and the printing circuit 5, and the nip start signal is transmitted to the printing circuit 5 and the nip control circuit 6. 43 to 45 are output. Recording start signals 41 and 42 and nip start signals 43 to 45 by the recording start signal generating circuit 3
Is output according to the control data 3 from the control unit 1.
1 and the data set signal 34.

The recording circuit 4 stores an image signal (image data) 30 from the control unit 1 and inputs the recording start signals 41 and 42 from the recording start signal generation circuit 3 to thereby store the stored recording signals 46 and 47 is output to each of the recording heads 13 and 14. The printing circuit 5 stores the image signals (print data) 30 from the control unit 1 and inputs the recording start signals 41 and 42 from the recording start signal generation circuit 3 so that the recording signals 46 and 47 are transmitted to each recording head. 13 and 14 at the same timing, the stored print signals 48 and 4
9 is output to each of the print heads 15 and 16.

When the nip control circuit 6 receives the nip start signals 43 to 45 from the recording start signal generation circuit 3, it outputs drive signals 50 to 52 to the nip motors 19 to 21 and nip rollers (53 to 55 in FIG. 2). Is driven.

Reference position sensor 7 (indicated by Sa in FIG. 1)
Are for detecting that the recording paper (reference numeral 100 in FIG. 2) that has been conveyed has entered the reference position. The nip pressure detection sensors 8 to 10 (indicated by Sb to Sd in FIG. 1) are nip rollers 53. To monitor (detect) the pressure bonding status of the recording confirmation sensors 11 and 12 (S in FIG. 1).
e, Sf) confirm the marks (see FIG. 4) printed by the print heads 15, 16.

Recording heads 13 and 14 (Ha, H in FIG. 1)
b) performs image recording on the surface of a recording sheet based on recording signals 46 and 47 from the recording circuit 4.
Print heads 15 and 16 (indicated by Hc and Hd in FIG. 1)
Prints marks on the back surface of the recording paper based on print signals 48 and 49 from the print circuit 5. The two recording heads 13 and 14 and the two print heads 15 and 16
Are in correspondence with each other.

The motors 17, 18, 22 (in FIG. 1, Ma,
Mb and Mf) are rollers (reference numerals 50a and 50 in FIG. 2).
0b, 51a-51c, 52a, 52b), and nip motors 19-21 (Mc, M in FIG. 1).
d, Me) are nip rollers (53 to 55 in FIG. 2)
Is to be driven.

FIG. 2 is a block diagram showing the mechanism of the image recording apparatus. Note that, in FIG. 2, components denoted by the same reference numerals as those in FIG. 1 are the same or corresponding components, and redundant description will be omitted. In the figure, conveying rollers 50a, 50
b is driven by the Ma motor 17 and
a to 51c are driven by the Mb motor 18, and the transport rollers 52a and 52b are driven by the Mf motor 22.

The nip roller 53 includes a Mc nip motor 1
9, the nip roller 54 is driven by the Md nip roller 20, and the nip roller 55 is driven by the Me nip motor 21. Developing unit 6
0 is for developing the recorded content recorded on the recording paper 100. Note that, as shown in FIG.
Two print heads 14 are arranged in the conveying direction of the recording paper 100 (a direction perpendicular to the scanning direction), and two print heads 15 and 16 are arranged at positions facing the recording heads 13 and 14.

Next, the operation will be described. FIG. 3 is a flowchart showing the operation of the recording control method of the image recording apparatus according to Embodiment 1 of the present invention. As shown in FIG. 3, the operation of the recording control method of the image recording apparatus is divided into preprocessing and feedback processing. The pre-processing is an operation of setting a reference parameter, recording an image and printing a mark, and reading the printed mark. The feedback processing corrects (updates) the reference parameter from the information obtained by reading the mark. This is the processing to be performed.

(1) Setting reference parameters (step ST)
1) When the process is started, first, the control unit 1 sets reference parameters. The control unit 1 includes data relating to the reference parameters (control data 31 and data set signals 32 and 34).
And control data 23 including data (image signal 30) relating to image / printing, the input control data 31
And the data set signal 32 to the line synchronization signal generation circuit 2
And the control data 31 and the data set signal 34
To the recording start signal generation circuit 3.

The line synchronization signal generation circuit 2 receives the control data 31 and the data set signal 32,
The LINE synchronization cycle of the line synchronization signal 40 is set, and the recording start signal generation circuit 3 receives the control data 31 and the data set signal 34 to generate the recording timing of the recording start signals 41 and 42 and the nip start signal 4.
The generation timing of 3 to 45 is set.

(2) Image recording / mark printing (Step S)
T2) When the setting of the reference parameters is completed, the control unit 1 supplies a start signal 33 instructing the generation of the line synchronization signal 40 to the line synchronization signal generation circuit 2. When the start signal 33 is input, the line synchronizing signal generation circuit 2 drives the nip roller 53 for pressing the recording paper 100 first.
Line synchronization signal 40 of LINE synchronization cycle for motor 19
And outputs the line synchronization signal 40 to the recording circuit 4, the printing circuit 5, and the recording start signal generating circuit 3, respectively.

Further, the control unit 1 outputs Ma
The recording paper 100 is conveyed by driving the motor 17. When the reference position sensor 7 is interrupted by the recording paper 100 and outputs the sensor output 24, the control unit 1 temporarily stops the conveyance of the recording paper 100. Then, at this point, the control unit 1 drives the Mb and Mf motors 18 and 22 by the drive pulses 37 and 38.

The control unit 1 outputs a start signal 35 for starting an internal counter for counting the number of pulses of the line synchronizing signal 40 of the recording start signal generating circuit 3 and, at the same time, a driving pulse 36 for restarting the driving of the Ma motor 17.
And the image data of the image signal 30 is output to the recording circuit 4, and the print data of the image signal 30 is output to the print circuit 5.

The recording start signal generating circuit 3 counts the number of pulses of the line synchronizing signal 40 and counts the number of conveying lines (number of pulses) at which the recording paper 100 reaches the first Mc nip roller 53. A nip start signal 43 for starting the operation is output to the nip control circuit 6 and the printing circuit 5. The nip control circuit 6 drives the Mc motor 19 by the drive pulse 50 until the nip pressure detection sensor 8 is turned on, presses the nip roller 53 against the recording paper 100,
Is transferred to the nip roller 53.

The recording start signal generating circuit 3
When 0 counts the number of transport lines of the line synchronization signal 40 reaching the recording head 13 and the printing head 15, a recording start signal 41 for starting recording and mark printing of the recording head 13 and the printing head 15 is sent to the recording circuit 4 and the printing circuit. 5 is output. Upon input of the recording start signal 41, the recording circuit 4 and the printing circuit 5 output a recording signal 46 and a printing signal 48 to the recording head 13 and the printing head 15, respectively, at the same timing. Recording head 13
When the recording signal 46 is input, an image is recorded on the front surface of the recording paper 100, and when the printing signal 48 is input, the print head 15 prints a mark on the back surface of the recording paper 100.

When the recording start signal generation circuit 3 counts the number of transport lines of the line synchronization signal 40 reaching the second nip roller 54, the recording start signal generation circuit 3 outputs a nip switching signal 39 to the line synchronization signal generation circuit 2 and simultaneously presses the nip roller 54 on. A nip start signal 44 for starting the operation is output to the nip control circuit 6 and the printing circuit 5.

When the nip switching signal 39 is input, the line synchronizing signal generating circuit 2 switches from the nip roller 53 to the LINE synchronizing line synchronizing signal 40 for the nip roller 54. The nip control circuit 6 uses the drive pulse 51 to drive Md until the nip pressure detection sensor 9 is turned on.
While the motor 20 is driven to press the nip roller 54 against the recording paper 100, the Mc motor 19 is driven by the drive pulse 50 to release the press from the nip roller 53, and the recording paper 100 is conveyed from the nip roller 53 to the nip roller 54. Move to

The recording start signal generating circuit 3 includes a recording head 1
When the number of transport lines of the line synchronization signal 40 reaching the print head 16 and the print head 16 is counted, a recording start signal 42 for starting image recording and mark printing by the recording head 14 and the print head 16 is sent to the recording circuit 4 and the printing circuit 5.
Output to When the recording start signal 42 is input, the recording circuit 4 and the printing circuit 5 transmit the recording signal 47 and the printing signal 49 at the same timing, respectively, to the recording head 14.
And print head 16. The recording head 14
When the recording signal 47 is input, an image is recorded on the front surface of the recording paper 100, and when the printing signal 49 is input, the print head 16 prints a mark on the back surface of the recording paper 100.

When the recording start signal generation circuit 3 counts the number of transport lines of the line synchronization signal 40 that reaches the third nip roller 55, it outputs a nip switching signal 39 to the line synchronization signal generation circuit 2 and simultaneously presses the nip roller 55. A nip start signal 45 for starting the operation is output to the nip control circuit 6 and the printing circuit 5.

When the nip switching signal 39 is input, the line synchronization signal generation circuit 2 switches from the nip roller (Mb) to the nip roller (Mc) line synchronization signal 40. The nip control circuit 6 includes the nip pressure detection sensor 1
Until 0 turns on, the drive pulse 52 causes the Me motor 2
1 to drive the nip roller 55 against the recording paper 100 while the drive pulse 51 drives the Md motor 20.
To release the pressure contact of the nip roller 54,
The conveyance of the recording paper 100 is shifted from the nip roller 54 to the nip roller 55.

With the above operation, an image is recorded on the front surface of the recording paper 100, and at the same time, a mark is printed on the back surface of the recording paper 100.

FIG. 4 is a diagram showing an example of a mark printed on the back of a recording sheet. As shown in FIG.
Two lines of line-shaped marks are printed on the back of 0. One line of the line-shaped mark is a mark printed by the print head 15, and another line of the line-shaped mark is a mark printed by the print head 16.
L1 is the printing interval when the nip roller 53 is transported, L2 is the printing interval when the nip roller 54 is transported, and L3 is the nip roller 5
Shows the printing interval during 5 transports. L4 indicates an error between the recording start positions of the print head 15 and the print head 16, that is, an error between the recording start positions of the print heads 13 and 14. As described above, as the mark recording pattern, two rows of linear marks at predetermined intervals are recorded on the recording confirmation sensor 11 side and the recording confirmation sensor 12 side.

(3) Mark reading (step ST3) When the image recording and the mark printing are completed, the recording paper 10
“0” passes through the recording confirmation sensor 11 for the print head 15 and the recording confirmation sensor 12 for the print head 16 arranged at the exit of the transport roller 51c and the nip roller 55, and the mark is read. The recording confirmation sensor 11 includes the print head 1
The record confirmation data 28 obtained by reading the mark No. 5 is transmitted to the control unit 1
The recording confirmation sensor 12 outputs the recording confirmation data 29 obtained by reading the mark of the print head 16 to the control unit 1.

(4) Correction of Recording Start Position and Line Synchronization Cycle (Steps ST4 to ST12) The control unit 1 performs a reference as feedback processing based on the recording confirmation data 28 and 29 from the recording confirmation sensors 11 and 12. The parameters (the LINE synchronization cycle of the line synchronization signal 40 and the generation timing of the recording start signals 41 and 42) are updated.

As shown in the flowchart of FIG. 3, first, the error of the recording start position of the print heads 15 and 16 (ie, the error of the recording start position of the recording heads 13 and 14) L4
(Step ST4), and if this error L4 is a positive value, the ON of the recording start signal 42 output by the recording start signal generating circuit 3 is advanced earlier by the number of lines corresponding to the error L4 (step ST4). ST5) If the error L4 has a negative value, the recording start signal 42 output by the recording start signal generating circuit 3 is turned on by the number of lines corresponding to the error L4.
Is delayed (step ST6).

Next, the print interval L1 is compared with the print interval L2 (step ST7). If L1> L2, the LI of the line synchronization signal 40 when the sheet is conveyed by the nip roller 54 is determined.
The NE synchronization cycle is lengthened by the number of lines corresponding to the error amount (step ST8), and if L1 <L2, the LINE synchronization cycle of the line synchronization signal 40 when transported by the nip roller 54 is set to the number of lines corresponding to the error amount. (Step ST9).

Next, the printing interval L1 and the printing interval L3 are compared (step ST10). If L1> L3, the L of the line synchronizing signal 40 when the sheet is conveyed by the nip roller 55 is determined.
The INE synchronization cycle is lengthened by the number of lines corresponding to the error amount (step ST11), and if L1 <L3, the LIN of the line synchronization signal 40 when transported by the nip roller 55
The E synchronization cycle is shortened by the number of lines corresponding to the error amount (step ST12).

(5) Development (Step ST13) Correction of Recording Start Position and Line Synchronization Cycle (Step ST13)
4 to Step ST12), the recording paper 100
Is transported by the transport rollers 52a and 52b and sent to the developing unit 60 for development.

As described above, according to the first embodiment, the recording timings of the recording start signals 41 and 42 and the LINE synchronization cycle of the line synchronization signal 40 are adjusted. In the case where an image is recorded by the plurality of recording heads 13 and 14 arranged in the transport direction of the recording paper 100, the recording start positions of the plurality of recording heads 13 and 14 and the transport speed of the recording paper 100 can be reliably corrected. A mark is printed on the back surface of the recording paper 100 by a plurality of print heads 15 and 16 corresponding to the plurality of recording heads 13 and 14, and the above correction is performed based on the mark.
14 can perform the above-described correction while performing image recording on the surface of the recording paper 100.

Further, since the recording start positions of the plurality of recording heads 13 and 14 and the transport speed of the plurality of nip rollers are adjusted by the LINE synchronization cycle (number of lines) of the line synchronization signal 40, it is possible to correct more accurately. it can.

In the first embodiment, the case where image recording and mark printing are performed by the two recording heads 13 and 14 and the print heads 15 and 16 has been described. However, the present invention is not limited to this. The present invention is also applicable to a case where image recording and mark printing are performed by a recording head and two or more print heads.

Embodiment 2 In the first embodiment, 2
The two rows of mark confirmation sensors 11 and 12 corresponding to the one print heads 15 and 16 confirm the printing of two rows of marks.
In step 1, the printing of one row of marks is confirmed.

FIG. 5 is a block diagram showing a configuration of such an image recording apparatus according to the second embodiment of the present invention.
Note that, in FIG. 5, the components denoted by the same reference numerals as those in FIG. 1 are the same or corresponding portions, and redundant description will be omitted. The recording confirmation sensor 11 is a sensor capable of detecting a difference in printing interval, and the printing interval mask circuit 22 masks a line of a mark at a certain interval or less,
The print interval signal 61, which is obtained by extracting only the marks printed by the print head 13, is sent to the control unit 1, and the recording start position error signal 62 of the print heads 15, 16 is sent to the control unit 1 by masking the marks at a certain interval or more. Things.

FIG. 6 is a diagram showing an example of a mark printed on the back of a recording sheet. As shown in FIG.
The marks printed by the recording papers 5 and 16 are
Are arranged in a single row on the back.

In the second embodiment, one record confirmation sensor 11 confirms the printing of one row of marks, sends the confirmed data to a print interval mask circuit 22, and the print interval mask circuit 22 controls the print head. The print interval signal 61 from which only the mark printed at 13 is extracted and the recording start position error signal 62 of the print heads 15 and 16 are separated and sent to the control unit 1. The control unit 1 corrects the recording start position and the transport speed based on the print interval signal 61 and the recording start position error signal 62 in the same manner as described in the first embodiment.

As described above, in the second embodiment as well as in the first embodiment, even when image recording is performed by the plurality of recording heads 13 and 14, the recording start positions and recording of the plurality of recording heads 13 and 14 are performed. The transport speed of the sheet 100 can be reliably corrected, and the correction during image recording can be realized.

[0049]

As described above, according to the first aspect of the present invention, the plurality of recording heads record an image on the surface of recording paper, and the plurality of recording heads form a pair with the plurality of recording heads. One print head prints a linear mark at a predetermined interval on the back of the recording paper, and the print heads other than the one print head print on the back of the recording paper at the same timing as the one print head. Prints line-shaped marks at intervals,
From the two line-shaped marks, the recording confirmation sensor confirms the recording start positions of the plurality of print heads and the transport speed of the plurality of transporting means, and based on the information confirmed by the recording confirmation sensor, the correction means Since the print start positions of the print heads and the plurality of print heads and the transport speeds of the plurality of transport units are corrected, even when image recording is performed by the plurality of print heads, the print start positions of the plurality of print heads and the recording paper The transport speed can be reliably corrected, and the above correction during image recording can be realized.

According to the second aspect of the invention, the correction of the recording start positions of the plurality of print heads and the plurality of recording heads by the correction means and the correction of the transport speed of the plurality of transport means are performed by the correction means.
Since the scanning is performed in units of lines for scanning the plurality of print heads and the plurality of recording heads, an effect is obtained that the correction can be performed with higher accuracy.

According to the third aspect of the present invention, one recording confirmation sensor is used to print one image printed by a plurality of print heads.
Since the line marks are checked for printing, it is possible to reliably correct the recording start positions of the plurality of recording heads and the transport speed of the recording paper even when performing image recording with a plurality of recording heads, as in the first aspect. Thus, the above-described correction during image recording can be realized.

According to the fourth aspect of the present invention, a plurality of recording heads for recording an image on the surface of the recording sheet, and a recording sheet paired with the plurality of recording heads and arranged to face the plurality of recording heads. A plurality of print heads that print line-shaped marks at predetermined intervals on the back surface of the print head; and a plurality of recording heads and a plurality of transport units that are disposed before and after with respect to the transport direction of the print heads and that press and transport the recording paper. A recording confirmation sensor for confirming a linear mark at a predetermined interval printed by the plurality of print heads, and a recording start position of the plurality of recording heads and the print head and a plurality of conveyance based on the mark confirmed by the recording confirmation sensor. And a correcting means for correcting the transport speed of the means, so that even when image recording is performed by a plurality of recording heads, the recording start positions and recording positions of the plurality of recording heads are also determined. With the conveying speed of the sheet can be corrected surely, there is an effect that it is possible to realize the correction of the image recording.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an image recording apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram illustrating a mechanical unit of the image recording apparatus.

FIG. 3 is a flowchart illustrating an operation of a recording control method of the image recording apparatus according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a mark printed on the back surface of a recording sheet.

FIG. 5 is a block diagram showing a configuration of an image recording apparatus according to Embodiment 2 of the present invention.

FIG. 6 is a diagram illustrating an example of a mark printed on the back surface of a recording sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control part (correction means) 2 LINE signal generation circuit (correction means) 3 Start signal generation circuit (correction means) 4 Recording circuit (correction means) 5 Printing circuit (correction means) 6 Nip control circuit (correction circuit) 11, 12 Recording confirmation sensor 13,14 Recording head 15,16 Print head

Claims (4)

[Claims] A plurality of recording heads record an image on a surface of recording paper, and one of the plurality of printing heads forming a pair with the plurality of recording heads is provided on a back surface of the recording paper. Print line marks at predetermined intervals, print heads other than the one print head, on the back of the recording paper, print line marks at predetermined intervals at the same timing as the one print head, From the two line-shaped marks, the recording confirmation sensor confirms the recording start positions of the plurality of print heads and the transport speed of the plurality of transporting means, and based on the information confirmed by the recording confirmation sensor, the correcting means
A recording control method for an image recording apparatus, wherein the recording start positions of the plurality of print heads, the plurality of recording heads, and the transport speed of the plurality of transport units are corrected. 2. The method according to claim 1, wherein the correction means corrects the recording start positions of the plurality of print heads and the plurality of recording heads and corrects the transport speed of the plurality of transport means by scanning the plurality of print heads and the plurality of print heads. 2. The recording control method for an image recording apparatus according to claim 1, wherein the recording is performed in units. 3. A recording control method for an image recording apparatus according to claim 1, wherein one recording confirmation sensor confirms printing of one line of marks printed by a plurality of print heads. 4. A plurality of recording heads for recording an image on a front surface of a recording sheet, and a predetermined interval on a back surface of the recording sheet, which is paired with the plurality of recording heads and opposed to the plurality of recording heads. A plurality of print heads for printing the linear mark of the above, a plurality of transporting means for pressing and transporting the recording paper disposed before and after with respect to the transport direction of the plurality of recording heads and the print head, A recording confirmation sensor for confirming a linear mark at a predetermined interval printed by the plurality of print heads, and a recording start position of the plurality of recording heads and the print head and the plurality of recording heads based on the mark confirmed by the recording confirmation sensor. An image recording apparatus, comprising: a correction unit configured to correct a transport speed of the transport unit.