JPH06143703A - Recording-paper correcting method in thermal recording apparatus - Google Patents

Abstract

PURPOSE:To obtain a high quality picture all the time by automatically correcting the inclination and performing the continuous recording when continu ous recording paper is inclined from the normal angle in the picture recording on the continuous recording paper with a thermal recording apparatus. CONSTITUTION:When the deviation of a sheet of recording paper 4 is greater than a specified extent on photoreflectors 21R and 21L in the non-recording state of a picture, a feeding mechanism 5 for the recording paper 4, nip-pressure applying mechanisms 11 and 12 of thermal heads 9 and 10 and a back-tension mechanism 6 for the recording paper 4 are released. Platen rollers 2 and 3 are vibrated with vibration applying means 22R and 22L, and the tight contact state of the recording paper 4 is eliminated. The recording paper 4 is moved into the reverse direction with respect to the deviation detecting direction with an adjusting mechanism 23 provided in a conveying path and returned to the estimated normal position. Thereafter, the released mechanisms 5, 9, 10, 11 and 12 are reset, and the next picture recording is started again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording paper correction method in a thermal recording apparatus, and particularly when performing thermal recording using continuous recording paper, the continuous recording paper is conveyed while being inclined from a regular set state. The present invention relates to an improvement for preventing deterioration of recorded image quality that sometimes occurs and always performing good image recording.

[0002]

2. Description of the Related Art Conventionally, a thermal recording system and a thermal transfer recording (melting type, sublimation type) system have been adopted for thermal recording, but an ink donor film (IDF) is used as a thermal recording device for obtaining a high quality color image. A thermal sublimation printer that uses a printer has attracted attention. This thermal sublimation printer selectively energizes each resistance heating element of the thermal head while forcibly conveying the IDF and recording paper between the platen roller and the thermal head while sublimating the IDF ink. An image is recorded by transferring it to a recording sheet. For a single recorded image, the recording sheet is stroked four times in the sub-scanning direction, and the IDF side also has four colors (yellow / yellow) corresponding to each stroke.
Magenta / cyan / black) areas are sequentially fed to finally obtain a color image.

Various types of recording paper conveyance systems are also used. A system is used in which a cut recording paper sheet is wound in close contact with a large-diameter platen roller and the platen roller is rotationally driven for recording. There is also a method of recording while feeding the recording paper by adhering it to the platen roller by a certain angle as in a normal printer, but when recording an image on a large recording paper such as A2 size, There is no choice but to adopt the method. Further, as described above, when it comes to an apparatus for thermal recording of high-quality color images, the recording paper is completely brought into close contact with the platen roller, and the recording line of the thermal head is evenly pressed onto the recording paper via the IDF. It is necessary to convey the recording paper while applying uniform tension.

For this reason, unlike a normal printer, a transport system based on the rotation drive of a platen roller is not adopted, and a system in which the delivery side is grasped by the gripper at the end of the recording paper and delivered, or the surface friction is large. A method of using a thermal spraying roller as a feed roller is adopted. Furthermore, in an apparatus that enables continuous recording using roll-shaped continuous recording paper without setting cut recording paper one by one, the intermittent recording on the roll side that occurs when the continuous recording paper is supplied from the roll is performed. Rotation causes the recording paper sent to the recording line of the thermal head to swing, so the continuous recording paper is pinched by a metal roller and a rubber roller with small surface friction on the supply side of the recording paper. A back tension mechanism is provided to rotate the to the reverse feed direction to apply reverse tension.

[0005]

By the way, in the thermal recording apparatus using the continuous recording paper as described above, it is necessary to set the continuous recording paper so that the feeding direction of the recording paper and the axial direction of the platen roller are perpendicular to each other. There is. Because the recording paper is pulled by the feeding mechanism and the back tensioning mechanism, and the surface of the platen roller is in close contact with a large friction coefficient, the recording paper will not be loaded if it is not set accurately. The surface of the platen roller shifts in the main scanning direction in proportion to the transport distance, and even in the case of continuous recording, even a slight set error causes the amount of movement to be a size that cannot be ignored.

The movement of the recording paper on the surface of the platen roller causes an imbalance in the tensile stress generated on the recording paper on the feed side and the recording paper on the supply side with the recording line of the thermal head as a boundary, and the recording paper is imbalanced. Bending is caused, resulting in deterioration of image quality. The imbalance of the tensile stress described above tends to return the recording paper to the normal set state, but if the recording paper moves during recording, a fatal defect occurs in the recorded image. become.

Therefore, it suffices if the continuous recording paper is initially set at an appropriate angle. However, when the size of the continuous recording paper in the width direction becomes large, a guide or scale for setting may be attached. It is very difficult to set accurately, and in practice, a deviation detection means such as a photo reflector is provided, and when the movement exceeds a predetermined value in the recording process, the notification lamp blinks and it is confirmed. Therefore, the current situation is to empirically correct it manually. Further, the above-mentioned misalignment of the recording paper occurs not only due to the initial setting error, but also due to the uneven tension force due to the characteristics of the feeding mechanism and the back tension mechanism and the parallelism between the platen roller and the feeding mechanism. This may be due to a mechanical factor such as a degree error, and in such a case, the misalignment of the recording paper will gradually appear in the recording process even if the initial setting is properly performed.

Therefore, the present invention, in a thermal recording apparatus using continuous recording paper, automatically corrects the deviation of the recording paper when it is above a certain level in a non-recorded state of the image, and always stabilizes it. It was created with the aim of providing a method to enable high quality image recording.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a continuous feeding sheet and a back tensioning mechanism arranged on both sides of a platen roller convey a continuous recording sheet while closely contacting the platen roller, and the continuous recording sheet in the platen roller portion is conveyed. In a thermal recording device that performs thermal recording by pressing a thermal head, the feeding mechanism, the back tension mechanism, and the thermal head pressing mechanism are made to be a mechanism that can be released from the state where the continuous recording paper is pressed, and the continuous recording paper conveyance path. A detection means for detecting the deviation of the continuous recording paper in the main scanning direction at a certain position, a vibration applying means for applying a vibration to the platen roller, and a moving means for moving a part of the continuous recording paper in the main scanning direction. When the detection means detects a deviation of a predetermined value or more in the non-recording state, the feed mechanism, the back tension mechanism, and the thermal head pressing mechanism are connected. The recording paper is released from the pressure state, the platen roller is vibrated by the vibration applying means, and the moving means moves a part of the continuous recording paper in the conveying path in the direction opposite to the deviation detection direction and sets it to the estimated normal position. In this state, the feeding mechanism, the back tension mechanism, and the thermal head pressing mechanism are returned to the pressure-applied state of the continuous recording paper.

Further, when the thermal recording device performs thermal recording on continuous recording paper using IDF, as described above, the feeding mechanism, the back tension mechanism and the thermal head pressing mechanism sandwich the continuous recording paper. Release from pressure state and ID
Reverse the winding roller of F to put IDF in a relaxed state.

[0011]

According to the present invention, when the initial set of continuous recording paper is not stretched vertically with respect to the platen roller, or when the recording paper is displaced in the main scanning direction during the recording process due to other mechanical factors, The detecting means detects the deviation amount, and when the deviation amount exceeds a certain allowable value in the non-recorded state of the image, the correction operation is executed.

In this case, in this thermal recording apparatus, since the continuous recording paper is conveyed in the platen roller with the pulling-out mechanism and the back tension mechanism, the continuous recording paper is in close contact with the platen roller. . Therefore, the feeding mechanism, the back tension mechanism, and the thermal head pressing mechanism are released from the pressure-applied state of the continuous recording paper so that the continuous recording paper is free before and after the platen roller. Vibrate to eliminate the close contact state.

Then, when a part of the continuous recording paper in the conveying path is moved by the moving means in the direction opposite to the deviation detection direction,
Since the supply source of the continuous recording paper in a roll form does not move, the inclination angle of the recording paper is corrected. Here, the amount of movement by the moving means is set as a constant return amount to an estimated proper position known in advance in the position where the moving means is arranged, or as a return amount corresponding to the amount of movement detected by the detecting means. It As a result, the inclination angle of the recording paper is corrected within a range in which the image quality is not deteriorated, the thermal recording apparatus is returned to the recording preparation state, and the thermal recording is restarted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recording paper correction method in a thermal recording apparatus of the present invention will be described in detail below with reference to the drawings.
The present embodiment is a thermal sublimation type color printer using an IDF, in which the method of the present invention is applied to a model capable of performing thermal recording on continuous recording paper having a main scanning direction size of A2 or larger. 1 (A) and (B) are a schematic front view and a plan view of the recording paper / IDF transport system, respectively (a part of the recording unit is omitted).
Indicates. Note that, in the plan view (B), for convenience of description, the conveyance system of the recording paper is expressed in a plan view.

In the figure, 1 is a metal support roller,
2, 3 are platen rollers (rubber rollers) that are brought into contact with the support roller 1, 4 is continuous recording paper, 5 is a feeding mechanism for the continuous recording paper 4, 6 is a back tension mechanism for the continuous recording paper 4, 7, 8 indicates a recording unit. Here, each recording unit 7 and 8 has a shaft 3 which is horizontally mounted between the main frame plates 30 and 31 on both sides.
The platen rollers 2 and 3 are rotatably supported with respect to 2, 33, and in a set state, they are fixed by a fastening mechanism 34 with the platen rollers 2 and 3 covered from above. And each recording unit 7,
8 is a thermal head 9,10 between the unit side plates (7a, 7b), (8a, 8b), a nip pressure applying mechanism 11, 12 for the thermal head 9, 10, and an IDF feeding mechanism (IDF 13, 14, IDF Take-up roll
15,16, IDF supply rolls 17,18, and other IDF transport direction shafts) are installed, and each recording unit 7,8
The nip pressure applying mechanisms 11 and 12 of the respective thermal heads 9 and 12 are divided into two platen rollers 2 and 3 in the main scanning direction.
The IDF feeding mechanism of each recording unit 7 and 8 conveys and supplies each IDF 13 and 14 to each thermal head 9 and 10 while pressing it toward the 10 side. In addition, (M1) and (M2) shown in FIG. 1 (B) are IDFs.
Set the motor for rotating the take-up rolls 15 and 16 to (M3), (M
4) shows the rotation driving motor for the eccentric cams of the nip pressure imparting mechanisms 11, 12, which conveys the IDFs 13, 14 by the rotation of the motors (M1), (M2) and rotates the motors (M3), (M4). The dynamic control realizes the nip pressure supply state and the release state of the thermal heads 7 and 8.

On the other hand, the transport system for the continuous recording paper 4 is in a roll form.
The continuous recording paper 4 wound around (4a) is hung from the back tension mechanism 6 to the two platen rollers 2 and 3, and the feeding mechanism 5 linearly grips the leading end of the continuous recording paper 4. The continuous recording paper 4 is conveyed by pulling it down along the guide. Then, in the feeding state, the back tension mechanism 6 presses the continuous recording paper 4 with the rubber roller 6a and the metal roller 6b while pressing the metal roller 6
By rotating b in the reverse feeding direction, a constant tension is applied to the continuous recording paper 4 in the path from the feeding mechanism 5 to the back tension mechanism 6 via the platen rollers 2 and 3, and the continuous recording paper 4 is always It is guaranteed that they will be conveyed and supplied to the recording unit in the expanded state. It should be noted that the feeding mechanism 5 is naturally in the grip state and the release state of the continuous recording paper 4, but the back tension mechanism 6 can also release the rubber roller 6a from the pressed state, and the back tension applied state and the released state. The states can be configured.

This thermal sublimation color printer is
The following recording operation is executed based on the above structure. First, all of the feeding mechanism 5, the nip pressure imparting mechanisms 11 and 12, and the back tension mechanism 6 are released, and the continuous recording paper 4 is pulled out from the roll portion 4a and hung on the path as shown in FIG. After the feeding mechanism 5 is in the grip state, the back tension mechanism 6 is shifted to the back tension applying state. Next, the nip pressure applying mechanisms 11 and 12 are switched to the nip pressure supplying state, and the IDFs 13 and 14 and the continuous recording paper 4 are connected to the thermal head.
Recording of image information on the continuous recording paper 4 is started in a state where there is a pressure between the platen rollers 2 and 3 and the platen rollers 9 and 10.

Image information is recorded by pulling the feeding mechanism 5 downward along the linear guide and feeding the continuous recording paper 4 while simultaneously rotating the motors (M19, (M2)) so that the yellow sections of the IDFs 13, 14 are moved. The first recording for yellow is completed by supplying electricity and selectively energizing the resistance heating elements of the thermal heads 9 and 10. In this printer, the thermal heads 9 and 10 are divided, 1A, the recording timings of the thermal heads 9 and 10 are staggered by a predetermined time in order to perform recording in the main scanning direction with recording lines separated from each other. , 12
When is switched to the released state and the feeding mechanism 5 is moved upward, the continuous recording paper 4 is conveyed in the reverse direction by the back tension mechanism 6 and returns to the initial position. Then, from that state, the nip pressure applying mechanisms 11 and 12 are switched again to the nip pressure supplying state, the feeding mechanism 5 is pulled down again, and the magenta section of the IDFs 13 and 14 is changed this time by the rotation of the motors (M1) and (M2). The second recording of magenta is completed by supplying power and selectively energizing the resistance heating elements of the thermal heads 9 and 10. Thereafter, in the same manner, the third and fourth recordings relating to cyan and black are performed, and finally the required color image is recorded on the continuous recording paper 4, but when the image recording is completed, it is fed. With the mechanism 5 in the released state, the feeding mechanism 5 is moved upward to grip the edge of the next image recording area on the continuous recording paper 4, and from that state, image recording is executed again in the same procedure as described above.

By the way, since the initial setting of the continuous recording paper 4 is carried out manually, it becomes difficult to set the correct direction in the case of a large size such as A2 size. That is, the continuous recording paper 4 should be set such that its feeding direction is perpendicular to the platen rollers 2 and 3, but as shown in FIG. It is often set. In addition, this situation may occur not only in the initial setting stage, but also due to various errors in the transport mechanism, the continuous recording paper 4 may gradually incline during continuous recording. Then, when such an inclination is generated, the tensile stress of the continuous recording paper 4 becomes uneven between the feeding mechanism 5 and the back tension mechanism 6, and the bending of the continuous recording paper 4 caused by it is caused by the platen. It propagates before and after the rollers 2 and 3 to cause recording unevenness and the like, which significantly deteriorates the image quality. Furthermore, the above-mentioned inclination causes the continuous recording paper 4 to shift in the main scanning direction at the platen rollers 2 and 3 during the continuous recording, and the shift amount is the feed amount in the sub scanning direction. Since it increases proportionally, image distortion will occur.

Therefore, in this embodiment, as shown in FIG. 1, two photoreflectors 21R and 21L and two sets of left and right vibration imparting mechanisms 22R and 22L with respect to the platen rollers 2 and 3 are provided.
An adjustment mechanism 23 for the continuous recording paper 4 is provided so that the displacement of the continuous recording paper 4 can be corrected.

The photoreflectors 21R and 21L are arranged between the platen roller 3 and the back tension mechanism 6 as shown in FIG. 1A, and detect the amount of light reflected from both side edges of the continuous recording paper 4. Then, the amount of deviation of the continuous recording paper 4 from the estimated normal position is measured.

On the other hand, the detailed structure of the vibration imparting mechanisms 22R and 22L is shown in FIG. 2, in which the reverse Y-shaped engaging lever 22a is connected to the plunger of the solenoid S1 fixed to the main frame plates 30 and 31. The bifurcated portion of the engagement lever 22a is engaged with the shafts of the platen rollers 2 and 3 by penetrating the guide portion 22b, and by intermittently energizing the solenoid S1, the platen rollers 2 and 3 are moved. Vibrate. Since the shafts of the platen rollers 2 and 3 are pivotally supported by the short rotation levers 2a and 3a with respect to the main frame plates 30 and 31, they are rotated by a minute angle by the stroke of the engagement lever 22a. You have the freedom to do so.

Further, as is apparent from FIG. 1, the adjusting mechanism 23 is provided on the main frame plates 30 and 31 between the platen roller 2 and the feeding mechanism 5, and its detailed structure is shown in FIG. (A)
And (B). 3A is a front view, and FIG.
Shows a side view (part of XX fracture cross section). This adjusting mechanism 23 slidably attaches a movable frame 23b wider than the width of the continuous recording paper 4 to a fixed plate 23a horizontally mounted on the main frame plates 30 and 31, and both side portions of the movable frame 23b are U-shaped. And the solenoids near both ends.
S2 is attached, and one end of an L-shaped lever 23c pivotally supported on the movable frame 23b is slidably connected to the plunger of the solenoid S2. Then, the other end of the L-shaped lever 23c is pushed outward by pulling the plunger of the solenoid S2, and the continuous recording paper 4 is held between the pushed other end and the inner wall of the U-shaped portion. It has become. A thin rubber plate is adhered to the holding surface of the L-shaped lever 23c and the inner wall of the U-shaped portion to increase friction. The movement of the moving frame 23b is performed by a solenoid S3 provided separately. That is, the solenoid S3 is fixed to the fixed plate 23a by utilizing the punching area of the moving frame 23b, the plunger of the solenoid S3 is connected to the bending plate portion 23d formed upright by the punching of the moving frame 23b, and the solenoid S3 The moving frame 23b can be stroked by driving.

In the present embodiment, continuous recording paper is produced by the new adding mechanism (21R, 21L) / (22R, 22L) / 23 described above.
The inclination correction operation 4 is executed, and the operation procedure will be described below with reference to the flowchart of FIG. The control of the following correction operation is executed by a microcomputer circuit (not shown) that controls the conveyance of the continuous recording paper 4 and the IDFs 13 and 14. First, when the recording of one color image is completed, the output of each photo reflector 21 is confirmed (F1,
F2). Here, if the continuous recording paper 4 has an inclination angle θ [see FIG. 1 (A)] during the initial setting stage or during image recording, the continuous recording paper 4 gradually becomes misaligned, and each photo reflector 21R The output of 21L changes in proportion to it. Therefore, when the deviation amount of the continuous recording paper 4 exceeds the allowable limit and becomes large, the outputs of the photo reflectors 21R and 21L also increase or decrease beyond the allowable range. The allowable range of the output of each photo reflector 21 corresponding to the deviation amount is empirically set, and is selected within a range in which the effect of the deviation does not appear on the recorded image.

Therefore, when the output of each photo reflector 21R, 21L does not exceed the allowable range, the next image recording is resumed as it is (F2 → F8), but when it exceeds, the next sequence is executed. . First, while the operation of the recording paper conveyance system is stopped, the motors (M3) and (M4) are rotated to bring the nip pressure applying mechanisms 11 and 12 into the released state, and the gripper of the feeding mechanism 5 is released. At the same time, the rubber roller 6a of the back tension mechanism 6 is released from the pressed state (F2 → F3).

Next, the motors (M1) and (M2) are slightly reversed to bring the IDFs 13 and 14 into a relaxed state, and in that state the vibration applying mechanism 22
The platen rollers 2 and 3 are vibrated by intermittently energizing the solenoids S1 of R and 22L (F4 and F5: see FIG. 2). Here, the vibration of the platen rollers 2 and 3 is caused by the nip pressure applying mechanisms 11 and 12, the feeding mechanism 5 and the back tension mechanism 6
Even when the continuous recording paper 4 is released, the continuous recording paper 4 that is in close contact with the surfaces of the platen rollers 2 and 3 is released, and the continuous recording paper 4 is restrained from moving in the left-right direction by the roll portion 4a. Except that, it will be completely free. Further, since the IDFs 13 and 14 are relaxed, no excessive force acts on the IDFs 13 and 14, and the IDFs 13 and 14 are smoothly separated from the continuous recording paper 4.

Then, by energizing the two solenoids S2 of the adjusting mechanism 23 from that state, the plunger is retracted, and both sides of the continuous recording paper 4 are held by the holding mechanism shown in FIG. 3 (F6 ). Then, by energizing the solenoid S3 of the adjusting mechanism 23, the moving frame 23b is moved in a direction opposite to the displacement direction of the continuous recording paper 4 detected by the photo reflector 21 by the sliding mechanism shown in FIG. (F
7). By this movement, the continuous recording paper 4 is moved together with the moving frame 23b in the direction for correcting the deviation, which corresponds to the movement in the direction for decreasing the inclination angle θ of the continuous recording paper 4 and the photoreflector 21 of each photoreflector 21. The output will also be within the allowable range.

Next, the nip pressure applying mechanism 1 released as described above.
Rotate motors (1) and (12) to nip pressure by rotating motors (M3) and (M4), reset feed mechanism 5 and back tension mechanism 6 and rotate motors (M1) and (M2) forward. IDF13,14
And then move to the next image recording (F8,
F9). As a result, the continuous recording paper 4
It is possible to record with the deviation and inclination corrected,
It is possible to always ensure high image quality.

In this embodiment, the photo reflectors 21R and 21L are used as means for detecting the deviation amount of the continuous recording paper 4, and the vibration applying mechanisms 22R and 22L for the platen rollers 2 and 3 and the adjusting mechanism of the continuous recording paper 4 are used. Although the solenoids S1, S2, and S3 are used, the solenoids S1, S2, and S3 may be configured to achieve their respective functions and are not necessarily limited to those parts and related mechanisms. For example, a one-dimensional image sensor may be used instead of the photo reflectors 21R and 21L, and the vibration applying mechanism 22
It is also possible to combine the drive system such as R, 22L with a motor and a ball screw, and the displacement amount may be quantitatively detected and the continuous recording paper 4 may be returned by a movement amount corresponding thereto. .

[0029]

The method of correcting the inclination of the recording paper in the thermal recording apparatus of the present invention has the above-mentioned structure, and thus has the following effects. When an image is recorded on a continuous recording paper by the thermal recording device, the continuous recording paper may not be recorded at the initial setting stage of the continuous recording paper or when the continuous recording paper is inclined from the regular angle due to the characteristics of the transport system of the thermal recording device. The shift amount is measured and automatically corrected before shifting to image recording, and it is possible to always obtain a high quality image while performing continuous recording.

[Brief description of drawings]

FIG. 1 is a schematic front view (A) and a plan view (B) of a recording paper / IDF transport system of a thermal sublimation color printer. However, plan view
In (B), a part of the recording unit is omitted, and only the recording paper transport system is shown as a plan development view.

FIG. 2 is an external perspective view of a vibration applying mechanism for the platen roller.

FIG. 3 is a front view (A) and a side view (partly XX fracture surface) (B) of a continuous recording paper movement adjusting mechanism.

FIG. 4 is a flowchart showing a procedure for correcting an inclination of continuous recording paper.

[Explanation of symbols]

1 ... Support roller, 2, 3 ... Platen roller, 2a, 3a ... Rotating lever, 4 ... Continuous recording paper, 5 ... Feed mechanism, 6 ... Back tension mechanism, 7, 8 ... Recording unit, 7a, 7b, 8a , 8b ... Unit side plate, 9, 10 ... Thermal head, 11, 12 ... Nip pressure applying mechanism, 13, 14 ... IDF, 15, 16 ... IDF winding roll, 17, 18 ... I
DF supply roll, 21R, 21L ... Photo reflector, 22R, 22L ...
Vibration imparting mechanism for platen roller, 22a ... Inverse Y-shaped engaging lever, 22b ... Guide portion, 23 ... Continuous recording paper adjusting mechanism, 23a ... Fixed plate, 23b ... Moving frame, 23c ... L-shaped lever, 23d … Bending plates, 30,31… Main frame plates, 32,33
… Axis, 34… Fastening mechanism, M1, M2, M3, M4… Motor, S1, S2, S3
…solenoid.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B41J 15/16 8306-2C

Claims (2)

[Claims] 1. A continuous recording sheet is conveyed while being brought into close contact with the platen roller by a feeding mechanism and a back tensioning mechanism arranged on both sides of the platen roller, and the thermal head is pressed against the continuous recording sheet in the platen roller portion for thermal recording. In the thermal recording device that performs the pulling mechanism, the back tension mechanism, and the thermal head pressing mechanism to be a mechanism that can be released from the pinching state of the continuous recording paper, the continuous recording paper A detection means for detecting a deviation in the main scanning direction, a vibration applying means for vibrating the platen roller, and a moving means for moving a part of the continuous recording paper in the main scanning direction are provided. Releases the feeding mechanism, back tension mechanism, and thermal head pressing mechanism from the continuous pressure of the recording paper when a deviation of more than a predetermined value is detected. Then, the platen roller is vibrated by the vibration applying means, and the moving means moves a part of the continuous recording paper in the conveying path in the direction opposite to the deviation detection direction to set it at the estimated normal position, and in that state, the feeding mechanism. A method of correcting a recording paper in a thermal recording apparatus, characterized in that the back tension mechanism and the thermal head pressing mechanism are returned to a state where the continuous recording paper is pressed. 2. When the thermal recording device performs thermal recording on continuous recording paper using an ink donor film, and when the detection means detects a deviation of a predetermined value or more in a non-recorded state of an image. The release mechanism, the back tension mechanism, and the thermal head pressing mechanism are released from the pressure-applied state of the continuous recording paper, and the take-up roller of the ink donor film is reversed to put the ink donor film in a relaxed state. 1. A recording paper correction method in the thermal recording apparatus of 1.