JPH09200408A - Method for adjusting carrying amount and recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically acquire a carrying amount of an original or paper to accurately record image information of the original by using an adjustment use test pattern. SOLUTION: Two types of carrying amount adjustment operating modes are prepared for a recorder 1. In the 1st mode, a test pattern used for adjusting the carrying amount of an original 19 or a paper sheet 25 stored in advance is recorded on the paper 25 and the carrying amount of the original 19 or the paper 25 to accurately record the image information of the original 19 is acquired automatically by reading the test pattern recorded on the paper 25 to adjust the carrying amount. In the 2nd mode, a reference original 19 on which the test pattern recorded on the original 19 or the paper 25 is recorded to adjust the carrying amount of the original 19 or the paper 25 is directly read to obtain the carrying amount of the original 19 or the paper sheet 25 to record accurately the image information of the original 19 automatically and the carrying amount is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrying amount adjusting method and a recording apparatus, and more particularly, it reads image information of a document by image reading means to obtain image data, and drives the recording means based on the image data. When recording on paper,
The present invention relates to a conveyance amount adjusting method and a recording apparatus capable of automatically obtaining a conveyance amount of a document or a sheet for accurately recording image information of a document.

[0002]

2. Description of the Related Art Generally, image information of a document is read by an image scanner as an image reading means to form image data, and a plain paper is used based on the image data by using a recording head such as a thermal head or an ink jet head. 2. Description of the Related Art Recording devices capable of recording on paper such as postcards are known.

The conventional recording apparatus having such a structure is provided with a scanning operation for moving the image scanner as the image reading means in the main scanning direction to read the image information of the document line by line, and a document conveying roller. By repeating the carrying operation (line feed operation) of moving the image scanner by a predetermined amount in the sub-scanning direction by the carrying means, the image information of the document can be read line by line to obtain the image data. .

The image data read by the image scanner has a recording operation in which a recording head is driven based on the image data, and an image such as a desired character is recorded on a sheet supported in front of the platen in line units. ,
Recording is performed on the paper by repeating a carrying operation (line feed operation) of moving the paper by a predetermined amount in the sub-scanning direction of the image scanner orthogonal to the moving direction of the recording head by the carrying means. .

By the way, in such a conventional recording apparatus, it is necessary to maintain the amount of conveyance (line feed amount) of the document or the sheet by the conveying means with high accuracy when performing the scanning operation and the recording operation.

This is because when the image information read by the image scanner is composed only of characters, when there is some error in the carry amount by the carrying means, that is, the carry motor consisting of a step motor is preset. Even when the transport amount of the document or sheet actually transported is slightly different from the required transport amount when the transport roller is rotated by rotating by the number of steps (rotation angle), the recording result is not so much. Is not affected, but the original scanned by the image scanner is a photograph, illustration,
When at least a part of the image information of the document is continuous in the line feed direction during recording, such as graphics, the amount of document or paper conveyed by the conveyance rollers, that is,
Unless the number of steps of the conveyance motor for driving the conveyance roller is properly adjusted for each individual recording apparatus, the image information of the original cannot be accurately recorded, that is, the recorded image recorded on the paper is called a stitch. This is because a white streak (when the carry amount is larger than the proper amount) or a black streak (when the carry amount is smaller than the proper amount) occurs. The amount of the original or the sheet conveyed by the conveying roller differs depending on the recording apparatus, depending on the outer diameter and eccentricity of the conveying roller, the precision of the gear for transmitting the driving force of the conveying motor to the conveying roller, and the like.

Therefore, in order to deal with such a problem, in the conventional printing apparatus, when the printing apparatus is manufactured, the carry amount is adjusted for each individual printing apparatus.
To adjust the amount of conveyance, test recording is performed on the paper for each print mechanism with sub-assembly, the presence or absence of stitches in the recorded image of the test recording recorded on the paper is visually determined, and based on the result of the determination, the conveyance means is used. The correction value (adjustment amount) that corrects the number of steps (rotation angle) of the carry motor that drives the carry roller to make the carry amount of the original or paper proper is determined for each print mechanism, and each print mechanism is set in the printer body. When assembled into a finished product, the carry amount is adjusted by operating the switch (dip switch) or storing the correction value determined for each print mechanism in the EPROM.

[0008]

However, in the above-mentioned conventional recording apparatus, the time and labor required for adjusting the conveyance amount of the document or the paper are different from each other, and as a result, the production amount of the recording apparatus is not stable. However, there has been a problem that the manufacturing process becomes complicated as the economic burden increases.

Further, since the correction value determined for each printing mechanism is determined by visually determining the presence or absence of stitches in the recorded image of the trial recording recorded on the paper, the correction value is corrected by the determination error of the presence or absence of stitches. There is a problem that a value setting error may occur.

Further, it is difficult for the user to carry out the maintenance accompanied by the adjustment of the carry amount of the recording apparatus shipped on the market at the installation place of the user, and it is very difficult for the user himself to adjust the carry amount. However, there has been a problem that a great deal of time and labor are required for maintenance accompanied by adjustment of the conveyance amount of the recording apparatus.

The present invention has been made in view of these points, and is a method for adjusting the amount of conveyance of an original or a sheet for automatically recording the image information of the original, and a method for adjusting the amount of conveyance. It is an object of the present invention to provide a recording device to which a quantity adjusting method is applied.

[0012]

In order to achieve the above-mentioned object, a carrying amount adjusting method of the present invention according to claim 1 reads a test pattern used for adjusting a carrying amount of a document or a sheet. The point is that, based on the read test pattern, the transport amount of the document or the paper for accurately recording the image information of the document is automatically obtained.

Further, the carrying amount adjusting method of the present invention as set forth in claim 2 is to record a test pattern stored in advance on a sheet and read the test pattern recorded on the sheet.

Further, the carrying amount adjusting method of the present invention according to claim 3 of the present invention is to read a reference document on which a test pattern is printed.

Further, the feature of the recording apparatus of the present invention described in claim 4 is that the correction value of the conveyance amount of the document or the paper for accurately recording the image information of the document is automatically obtained. It has a carry amount adjusting operation mode.

Further, the feature of the recording apparatus of the present invention described in claim 5 is that the document is read by reading a test pattern used for adjusting the carry amount of the document or the paper in the carry amount adjusting operation mode. The point is that a control means is provided for adjusting the carry amount of a document or paper for accurately recording image information.

By operating the recording apparatus of the present invention according to the carry amount adjusting method of the present invention, the recording apparatus itself can automatically obtain the carry amount in the carry amount adjusting operation mode. Further, the control means can adjust the carry amount of the document or the paper in the carry amount adjusting operation mode so as to accurately record the image information of the document.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIGS. 1 to 7 show an example of an embodiment of a recording apparatus of the present invention to which a method for adjusting the carry amount according to the present invention is applied. FIG. 1 is a plan view showing a main portion, and FIG. Left side view, FIG. 3 is a plan view showing a carriage unit, FIG. 4 is a plan view showing a configuration of a main part inside a scanner mounting portion, FIG. 5 is a front view showing a reference plate, FIG. 6 is a side perspective view, 7 is a block diagram showing the configuration of the control means.

As shown in FIGS. 1 and 2, the recording apparatus 1 according to the present embodiment has a frame 2 having a substantially rectangular plane shape which is disposed inside a printer body (not shown).
A plate-shaped platen 3 is arranged on the frame 2 so as to extend in the left-right direction in FIG. 1 with its recording surface 3a being substantially vertical. A carriage unit 4 is provided in front of the platen 3 (downward in FIG. 1) so as to be able to reciprocate along the platen 3.

As shown in FIG. 1, the carriage unit 4
A drive belt 5 is disposed below the drive belt 5, and the carriage unit 4 is fixed to one position of the drive belt 5. The drive belt 5 is wound around a pair of left and right pulleys 6 and 6 arranged near the left and right ends of the frame 2 in FIG. One of the pulleys 6 shown on the right side in FIG. 1 is a carriage motor 7 including a step motor or the like as a driving unit indicated by a broken line on the right side in FIG.
It is possible to rotate with the driving force of. Further, the carriage motor 7 is electrically connected to a control means 8 described later provided at a desired position on the frame 2, and is driven based on a control command sent from the control means 8. ing.

That is, by driving the carriage motor 7 based on the control command sent from the control means 8, the carriage unit 4 reciprocates along the platen 3 as shown by a double-headed arrow A in FIG. It is supposed to do.

A drive means 10 for reciprocating the carriage unit 4 in the main scanning direction orthogonal to the sub-scanning direction of an image scanner 9 as an image reading means which will be described later by the drive belt 5, the pulleys 6, 6 and the carriage motor 7. Is configured.

As shown in FIGS. 1 and 3, the carriage unit 4 has a carriage section 11 located on the right side and a scanner mounting section 12 located on the left side of the carriage section 11.

A thermal head 13 as a recording head, which is a recording means, is arranged in the carriage portion 11 so as to face the recording surface 3a of the platen 3. A plurality of the thermal heads 13 are arranged in an array to selectively generate heat on the basis of image data (image information of an original document converted for use in recording), which is recording information, according to a control command from the control unit 8 described later. The heating element (not shown) is provided, and the head driving mechanism (not shown) can contact and separate the recording surface 3a of the platen 3. The contact position between the thermal head 13 and the platen 3 in the head-down state in contact with the recording surface 3a of the platen 3 is the recording position.

Further, the upper surface of the carriage portion 11 is shown in FIG.
A ribbon cassette 14 that accommodates an ink ribbon (not shown) and guides the ink ribbon to the front of the thermal head 13 can be attached as indicated by an imaginary line on the left side of FIG. Further, on the carriage portion 11, a winding bobbin 15 and a delivery bobbin 16 are arranged so that their respective tip portions project from the upper surface of the carriage portion 11. The winding bobbin 15 and the sending bobbin 16
Is a part of a well-known ribbon traveling mechanism (not shown), and by driving the ribbon traveling mechanism in the recording state, the ribbon cassette 14 mounted on the upper surface of the carriage unit 11 is installed inside. It is designed to run the stored ink ribbon.

The thermal head 13, the head drive mechanism, the ribbon running mechanism, etc. are electrically connected to a control means 8 described later, and are driven based on a control command sent from the control means 8. ing.

As shown in FIG. 4, the scanner mounting portion 12 is provided with an image scanner 9 as an image reading means so as to face the recording surface 3a of the platen 3. The image scanner 9 has a case body 17 having a substantially rectangular parallelepiped shape in which an opening 17a is formed on the surface facing the platen 3, and the inside of the case body 17 near the opening 17a (upper left and right ends in FIG. 4). And the original images held in front of the platen 3 via the lens 18 are arranged in parallel in the main scanning direction of the image scanner 9 which is the moving direction of the carriage unit 4 so as to face each other. Two light sources 20 for irradiating light toward a document 19 such as a photograph or a postcard, and a reflection that is reflected from the document 19 in an image reading state, which is provided in a substantially central portion inside the case body 17. The image sensor unit 22 includes a small image sensor 21 that reads image information of the original 19 by light and outputs image data. Further, the image scanner 9 is electrically connected to the control means 8 described later.

The scanner mounting portion 12 is capable of reciprocating along the platen 3 with the driving force of the carriage motor 7 together with the carriage portion 11 in the image reading state. The carriage unit indicated by a double-headed arrow A in FIG. The moving direction of 4 is the main scanning direction in the image reading state in which the image information of the original 19 is read by the image scanner 9.

The reference position (home position HP) of the operation of the carriage unit 4 in the present embodiment.
Are configured to be detected using the image scanner 9.

Further, as shown in FIG. 1, the image scanner 9 is provided with a reference plate 23 which is erected on the left upper surface of the frame 2 so as to be positioned on the extension line of the platen 3,
A color reference (white balance) for reading the image information of the original 19 is obtained. This reference plate 23
5 has a substantially rectangular front shape as shown in FIG. 5, and the surface 23a facing the image scanner 9 is white with a high lightness, which serves as a reference color for reading the original 19.
Further, on the facing surface 23a of the reference plate 23, a mark 24 for detecting the reference position of the operation of the carriage unit 4 with high accuracy by the image scanner 9 is provided.

As shown in FIG. 6, below the platen 3, the document 19 or the paper 25 is moved at a predetermined speed so as to pass in front of the recording surface 3a of the platen 3, as indicated by an arrow B in FIG. A carrying roller 26 for carrying the paper is provided. As shown in FIG. 1, the carrying roller 26 can be rotated by the driving force of a carrying motor 27, which is a step motor arranged outside the right side surface of the frame 2.

As shown in FIG. 6, auxiliary rollers 28, which are brought into contact with the conveying roller 26 with a desired pressure contact force, are rotatably disposed on the lower left and right sides of the conveying roller 26. The auxiliary roller 28 is adapted to rotate following the transport roller 26. That is, the document 19 or the paper 25 is made to be able to run while being sandwiched between the transport roller 26 and the auxiliary roller 28. A guide (not shown) for guiding the document 19 or the paper 25 so as to travel on a predetermined transport path is provided at an appropriate position around the transport roller 26.

The carrying motor 27 is electrically connected to a control means 8 which will be described later, which is arranged at a desired position of the frame 2, and is driven based on a control command sent from the control means 8. It has become.

That is, by driving the carry motor 27 on the basis of the control command sent from the control means 8, the original 19 or the paper 25 is moved as shown by an arrow B in FIG. 1 and FIG. The image scanner 9 is designed to convey the carriage unit 4 in a direction orthogonal to the moving direction of the carriage unit 4 as indicated by a double-headed arrow A, and the traveling direction of the document 19 or the paper 25 indicated by an arrow B in FIGS. The sub-scanning direction is in the image reading state in which the image information of the original 19 is read.

The carrying roller 26, the carrying motor 27 and the auxiliary roller 28 constitute a carrying means 29 for running the original 19 or the paper 25 in the sub-scanning direction.

The presence or absence of the original 19 or the paper 25 and the original 19 traveling in the sub-scanning direction in this embodiment.
Alternatively, the leading edge of the paper 25 is configured to be detected by the image scanner 9.

Returning to FIG. 1, a control means 8 for controlling the operation of each section of the recording apparatus 1 is arranged at a desired position on the frame 2. As shown in FIG. 7, the control means 8 includes at least a CPU 30 and a ROM having an appropriate capacity,
It has a memory 31 formed of a RAM and the like, and a controller 32 for driving each unit of the recording apparatus 1. Further, as shown in FIGS. 1 and 7, the control means 8 is electrically connected to a mode changeover switch 33 provided in a printer main body (not shown) for selectively changing over the operation mode. By selectively switching 33, the normal printer operation mode and the carry amount adjusting operation mode can be selected.

Further, in the carry amount adjusting operation mode in the recording apparatus 1 of the present embodiment, a test pattern used for adjusting the carry amount of the original 19 or the paper 25 stored in advance is recorded on the paper 19 and recorded on the paper 19. The first adjustment mode for adjusting the carry amount by automatically obtaining the carry amount of the manuscript 19 or the paper 25 for accurately recording the image information of the manuscript 19 by reading the prepared test pattern, and the manuscript 19 or the paper 25. By directly reading the reference original 19 on which the test pattern used for adjusting the conveyance amount of the document 19 is directly read, the conveyance amount of the document 19 or the paper 25 for accurately recording the image information of the document 19 is automatically obtained. The second adjustment mode to be adjusted can be selected as required.

An example of the test pattern used for adjusting the carry amount is one in which white portions and black portions are arranged in a zigzag pattern.

The memory 31 stores at least various image data such as image data of the document 19 which is output from the image scanner 9 and converted into a digital electric signal by the A / D converter 34 and brightness information of the reference plate 23. An input data storage area 35 for storing input data, a program storage area 36 for storing various programs, recording information for recording, a control command for inputting image information of the original 19, and recording An output data storage area 37 for storing various output data such as control commands, and a document 1
9 or a test pattern storage area 38 for storing a test pattern used for adjusting the carry amount of the paper 25.

In the program storage area 36, the original 19 by the image scanner 9 during the scanning operation based on the test pattern read by the image scanner 9 is used.
A correction value for automatically adjusting the carry amount (line feed pitch) and the carry amount (line feed pitch) of the paper 25 by the thermal head 13 during the recording operation so that the image information of the original 19 can be accurately recorded is automatically obtained. And a motor for adjusting the number of steps of the carry motor 27 according to the correction value obtained by the correction value acquisition unit 39 so that the image information can be accurately recorded. An adjusting unit 40 is provided, and a program for converting image data into recording information (recording data), a control program for controlling the operation of each unit, and the like are stored.

The controller 32 has at least the following:
A head drive driver 41 used to energize a heating element (not shown) of the thermal head 13 and a carriage motor driver 4 used to drive the carriage motor 7.
2. A transport motor driver 43 used to drive the transport motor 27 is provided, and the thermal head 1 is further provided.
Head drive mechanism (not shown) that drives the head 3 to move toward and away from the platen 3. Ribbon drive driver used to drive an ink ribbon running mechanism (not shown). (Not shown) and the like are provided.

The recording apparatus 1 of the present embodiment is also used as a general recording apparatus for recording an image formed by the word processor, computer or the like on the paper 25 by connecting it to a word processor, computer or the like not shown. Therefore, various external signals from the outside can be inputted to the control means 8.

In the recording apparatus 1 according to the present embodiment, the original 1 stored in advance is set as the transport amount adjusting operation mode.
9 or a first adjustment mode in which a test pattern used for adjusting the carry amount of the paper 25 is recorded on the paper 19 and the carry amount is adjusted by reading the test pattern recorded on the paper 19, and the carry amount of the original 19 or the paper 25. The second adjustment mode in which the carry amount is adjusted by directly reading the reference original 19A on which the test pattern used for the adjustment is printed can be selected as necessary, but the configuration has only one of the modes. May be

Next, the operation of the carry amount adjusting method in the recording apparatus of the present embodiment will be described.

To adjust the carry amount in the recording apparatus 1 according to the present embodiment, the mode changeover switch 33 is set to the carry amount adjusting operation mode, and the carry amount adjusting operation mode is either the first adjusting mode or the second adjusting mode. One side. The selection of the first adjustment mode or the second adjustment mode may be made as needed.

When the transport amount adjusting operation mode is the first adjusting mode, the test pattern stored in the test pattern storing area of the memory 31 of the control means 8 is recorded on the paper 25 by the thermal head 13 and this paper is used. The image scanner 9 reads the test pattern 25 recorded as a document 19.

When the carry amount adjusting operation mode is the second adjusting mode, the reference original 19 on which the test pattern is accurately printed is directly read by the image scanner 9.

The test pattern is read by, for example, as shown in FIG. 8, by reading a range indicated by a double-headed arrow C in FIG.

Then, the correction value is calculated by the program stored in the correction value acquisition unit 39. The correction value is calculated, for example, by the position data of the change point at which the digit position indicated by the symbol P1 in FIG. 8 changes from black to white, and from the white at the digit position indicated by the symbol P2 in FIG. The position data of the changing point is calculated, and the deviation of the carry amount is calculated from the row position of each changing point at both digit positions.

Next, the number of steps of the carry motor 27 is adjusted (changed) based on the correction value by the program stored in the motor adjusting section 40. Based on the number of steps, the carry motor driver 43 controls the carry amount of the document 19 or the paper 25 during the subsequent scanning and recording operations.

Then, the mode changeover switch 33 is set to the printer operation mode, and the operation of adjusting the carry amount of the original 19 or the paper 25 for accurately recording the image information of the original 19 is completed.

When correcting the number of steps of the carry motor 27, an average value obtained by averaging a plurality of correction values calculated using a plurality of rows of the test pattern (corresponding to one rotation of the carry roller 26) may be used. Good. This is because, due to the accuracy of the carrying roller 26, generally, the carrying roller 26 does not make one rotation when the original 19 or the paper 25 is lined, but the carrying roller 26 makes one rotation by a plurality of line feed operations. It is because it is done. In other words, by using the average value, it is possible to deal with the case where a plurality of carry amounts when the carry roller 26 makes one rotation is not always the same due to the eccentricity of the carry roller 26, and the carry amount is adjusted with higher accuracy. Because you can do it.

Further, when the resolution of the image scanner 9 is not sufficiently fine, for example, when the resolution of the image scanner 9 is only 20 μm when designing a test pattern in units of 5 μm, the conveyance roller 26 is set. It is advisable to drive the test pattern a plurality of times by a small amount and convert it from the position of the color change point of the test pattern obtained each time the scanning is performed to obtain the correction value.

Furthermore, it is also possible to increase the number of digit positions to see the color change points of the test pattern and use an average value obtained by averaging a plurality of correction values in the digit direction parallel to the scanning and printing directions. By using this average value, it is possible to prevent an error such as a skew or a deviation of the printed test pattern of the reference document 19 and to adjust the carry amount with higher accuracy.

Therefore, according to the recording apparatus 1 of the present embodiment, it is not necessary to adjust the carry amount for each print mechanism (not shown) when manufacturing the recording apparatus 1, and each print mechanism is not required to be adjusted. Since it is possible to adjust the carry amount after it is assembled into the printer body to make a finished product, the manufacturing process can be surely simplified, and the labor required for adjusting the carry amount can be surely reduced. The time required for adjustment can be made constant, the economic burden can be reliably reduced, and the productivity can be stabilized.

Further, since it is not necessary to visually determine the presence or absence of a stitch when adjusting the carry amount, it is possible to reliably prevent an erroneous determination of the presence or absence of a stitch due to an operator's eye fatigue. At the same time, the burden on the operator can be reliably reduced.

Further, since the adjustment of the carry amount can be obtained by using the apparatus itself, the maintenance accompanied by the adjustment of the carry amount of the recording apparatus 1 shipped on the market can be easily performed at the user's installation place. It is also possible to entrust the user with confidence in the adjustment of the carry amount.

Furthermore, the test pattern recording apparatus 1
By storing the reference original 19 on which the test pattern is printed, it is possible to prevent an error caused when the test pattern surface of the reference original 19 is smeared or misaligned, and the reference original 19 is stored and carried easily. Can be eliminated.

In the recording apparatus 1 according to the present embodiment, a correction value for adjusting the carry amount can be obtained, and the carry value is automatically adjusted using the program using the correction value. Although the configuration is performed, the configuration for adjusting the carry amount can be selected from various configurations such as using a DIP switch without using a program.

Further, the present invention is not limited to the above-mentioned embodiment, but can be modified as necessary.

[0063]

As described above, according to the carrying amount adjusting method and the recording apparatus of the present invention, the apparatus itself is provided with the carrying amount adjusting operation mode so that the apparatus itself records the image information of the original accurately. This has an extremely excellent effect of being able to automatically obtain the conveyance amount of the original document or the sheet.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an example of an embodiment of a recording apparatus of the present invention to which a carry amount adjusting method of the present invention is applied.

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a plan view showing a main part of the carriage unit shown in FIG.

FIG. 4 is a plan view showing a configuration of a main part inside the scanner mounting unit of FIG.

5 is a front view showing the reference plate of FIG. 1. FIG.

6 is a side perspective view of FIG.

FIG. 7 is a block diagram showing the configuration of the control means shown in FIG.

FIG. 8 is an explanatory diagram showing a main part of an example of an adjusting operation using the carry amount adjusting method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 recording device 8 control means 9 image scanner 10 (as image reading means) 10 driving means 13 thermal head (as recording means) 19 original document 25 paper 26 transport roller 27 transport motor 29 transport means 33 mode change switch 39 correction value acquisition unit 40 Motor adjustment unit

Claims (5)

[Claims] 1. A test pattern used for adjusting the carry amount of a document or a sheet is read, and the carry amount of the document or the sheet for accurately recording image information of the document is automatically determined based on the read test pattern. A method for adjusting the carry amount, which comprises: 2. The carry amount adjusting method according to claim 1, wherein a test pattern stored in advance is recorded on a sheet, and the test pattern recorded on the sheet is read. 3. The conveyance amount adjusting method according to claim 1, wherein a reference document on which the test pattern is printed is read. 4. A recording having image reading means for reading image information of an original, recording means for recording on a paper based on at least image data output from the image reading means, and conveying means for conveying the original or the paper. A recording apparatus having a conveyance amount adjusting operation mode for automatically obtaining a conveyance amount of a document or a sheet for accurately recording image information of the document. 5. In the carry amount adjusting operation mode, a test pattern used for adjusting a carry amount of a document or a sheet is read to adjust a carry amount of a document or a sheet for accurately recording image information of the document. The recording apparatus according to claim 4, further comprising control means.