JP2006198963A - Film peeling method for intermediate transfer type thermal transfer printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably peel a film after the transfer of an image on a recording medium. <P>SOLUTION: This film peeling method comprises: an image transfer step of thermally transferring the image by pressing the film F against the surface of a card S by means of a heat roller 24 while moving forward the card S; a backward carrying step of retreating the card S toward a peeling pin 30 arranged outside a film carrying line, while pulling back and carrying the film F toward a platen roller 21 by rotating the platen roller 21, after the image transfer step; and a film peeling step of peeling the film F from a back end of the card S while hooking the film F on the peeling pin 30, by pulling back and carrying the film F toward the platen roller 21. Before the film peeling step, the backward carrying of the card S and the pull-back carrying of the film F are alternately and intermittently performed in the backward carrying step. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a film peeling method in an intermediate transfer type thermal transfer printing apparatus for once transferring an image on a film and then retransferring the image on the film to the surface of a recording medium.

Conventionally, as a technology in such a field, there is JP-A-5-261951. The thermal transfer printing apparatus described in this publication is an apparatus for printing a desired image on the surface of a card-like recording medium such as a card with a magnetic stripe or an IC card. That is, this thermal transfer printing apparatus sandwiches a transparent material ribbon (transparent film) and a color ink ribbon between a thermal head and a feed roller (platen roller), and temporarily transfers an image onto the transparent film with the color ink ribbon (primary transfer). Then, the transparent film is heated with a heating roller while superimposing the image on the transparent film and the surface of the card. At this time, by pressing the transparent film against the card, the image on the transparent film is retransferred (secondary transfer) to the surface of the card.
Japanese Patent Laid-Open No. 5-261951

  In such a thermal transfer printing apparatus, it is necessary to peel off the transparent film from the card after retransferring the image from the transparent film to the card. In this case, unless the card is sufficiently cooled and then peeled off, it may cause a chipped image retransferred to the card or an image burr at the edge of the card. In particular, in recent years, card materials have been diversified from polyvinyl chloride (PVC) to polyethylene terephthalate (PET). Especially when a film is provided with an adhesive layer, it is essential to cool the card when the film is peeled off. ing.

  Thus, as a method for cooling the card before the film is peeled off, it is conceivable that the card is cooled together with the film after retransfer. At that time, depending on the card conveyance speed and the film winding speed, the card may be lifted in the film winding direction, which causes a jam of the card. On the other hand, the amount of looseness of the film increases and the film may be caught at the end of the card. In this case, it is difficult to smoothly peel the film from the card.

  Accordingly, the present invention has been made in view of the above problems, and provides a film peeling method in an intermediate transfer type thermal transfer printing apparatus that stably performs film peeling after image transfer to a recording medium. With the goal.

  In order to solve the above problems, the film peeling method in the intermediate transfer type thermal transfer printing apparatus of the present invention is such that the image is thermally transferred to the film based on the color arrangement on the ink ribbon by the cooperation of the thermal head and the platen roller. Is a film peeling method in an intermediate transfer type thermal transfer printing apparatus that re-transfers the image on the film to the surface of the recording medium by pressing it against the recording medium while being heated by a heat roller. An image transfer step in which the film is pressed against the surface of the recording medium by a heat roller to thermally transfer the image, and after the image transfer step, the platen roller is rotated and the film is pulled back and conveyed toward the platen roller. A peeling pin placed outside the film transport line between A reverse conveyance step for moving the recording medium back toward the platen, and a film peeling step for peeling the film from the rear end of the recording medium while pulling the film toward the platen roller and hooking the film on the peeling pin. Before the film peeling step, the backward conveyance step is characterized in that the backward conveyance of the recording medium and the reverse conveyance of the film are alternately and intermittently performed.

  According to such a film peeling method, after the image is thermally transferred by pressing the film against the surface of the recording medium with a heat roller, the recording medium and the film are integrated and arranged outside the film conveyance line. The recording medium is conveyed backward toward the peeled pin. Thereafter, the film is peeled from the rear end of the recording medium by being pulled back and conveyed while being hooked on the peeling pin. In this case, since the recording medium is reversely conveyed and the film is retracted alternately between the time after image thermal transfer and the film peeling, the range of the amount of slackness of the film at the trailing edge of the recording medium is set to a predetermined value. Can be easily maintained within range. As a result, it is possible to prevent displacement from the conveyance path of the recording medium and catching of the film at the end of the recording medium.

  In the film peeling step, it is preferable that the reverse conveyance speed of the recording medium and the rotation speed of the platen roller are substantially the same. By doing so, the film peeling angle with respect to the card surface at the time of film peeling can be stabilized, so that chipping and burrs of the transferred image after film peeling can be effectively prevented.

  Furthermore, in the film peeling step, it is also preferable to continue the receding of the recording medium and the drawing back of the film until the film is completely peeled from the surface of the recording medium. In this case, since retransfer and film peeling are completed by one reciprocating motion of the recording medium, the processing for each recording medium can be performed efficiently. In particular, when it is necessary to perform transfer processing on both sides of the recording medium, it is advantageous because reciprocation on the recording medium conveyance line is essential.

  According to the film peeling method in the intermediate transfer type thermal transfer printing apparatus of the present invention, film peeling after image transfer onto a card can be stably performed.

  Hereinafter, a preferred embodiment of a film peeling method in an intermediate transfer thermal transfer printing apparatus according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the intermediate transfer type thermal transfer printing apparatus 1 is also called a card printer, and once a printed image is transferred to a transparent film F having a thickness of about 20 μm, the recording medium (for example, plastic) is transferred from the film F. (Transfer cash card, credit card, prepaid card, IC card, etc.). Such a thermal transfer printing apparatus 1 is used when issuing the card S, and can print a high-quality image on the surface of the card S. Therefore, it is possible to issue a card S containing a face photo for the purpose of improving security.

  Such an intermediate transfer type thermal transfer printing apparatus 1 has a card cassette 2 for setting a plastic card S before image retransfer to be detachable in a stacked state. The cards S are fed out one by one from the bottom of the card cassette 2 by the forward and backward movement of the delivery pawl 3, and the cards S fed out from the card cassette 2 are once loaded into the reversing unit 4. After the reversing unit 4 is rotated 90 degrees from the horizontal state, when the card S is raised by the feed roller 6, the card S is fed into the magnetic reading / writing unit 7. The magnetic reading / writing unit 7 writes predetermined information in the magnetic stripe of the card S or reads predetermined information in the magnetic stripe.

  On the other hand, when the card S is lowered by the feed roller 6, the card S is fed into the non-contact IC reading / writing unit 8. Then, the non-contact IC reading / writing unit 8 writes predetermined information in the IC of the card S or reads predetermined information in the IC. Thereafter, the card S sent out from the reversing unit 4 passes through the detachable cleaning roller 10 and is supported on both sides by the guide groove 13 and immediately before the card S is printed by the conveying roller 11 and the feed roller 12. Move up.

  In addition, when magnetic detection or non-contact IC detection is not necessary, the reversing unit 4 is maintained horizontally. The card S determined to be inappropriate by the magnetic reading / writing unit 7 or the non-contact IC reading / writing unit 8 is discharged into the eject box 9 by the feed roller 6 after the reversing unit 4 rotates.

  Next, in order to enable image transfer to the card S, the thermal transfer printing apparatus 1 includes a recording unit (primary transfer unit) A that thermally transfers an image to the film F, an image transferred to the film F, and the card S. And a re-transfer portion (secondary transfer portion) B that thermally transfers the image to the card S, and a warp correction portion C that corrects the warp of the card S after the image transfer.

  Further, the thermal transfer printing apparatus 1 has a film cartridge 14 and a ribbon cartridge 15 that can be exchanged by inserting and removing. In the film cartridge 14, the film F is wound around a pair of upper and lower bobbins 16 and 17, and in the ribbon cartridge 15, the color ink ribbon R is wound around a pair of upper and lower bobbins 18 and 19. The color ink ribbon R in the ribbon cartridge 15 is periodically coated with ink of three colors (or four colors including black) of meltable or sublimable yellow, magenta, and cyan as one frame. ing.

  Here, in the recording portion A described above, the film F is wound around the substantially half circumference of the platen roller 21 by the cooperation of the film drawing rollers 20a and 20b that can advance and retreat in the horizontal direction and the platen roller (commonly referred to as “platen”) 21. The color ink ribbon R is pressed against the film F on the platen roller 21 by the thermal head 22. Then, the film F and the color ink ribbon R are sent downward while being synchronized, whereby the first color (yellow) of the color ink ribbon R is thermally transferred onto the film F by the heated thermal head 22. The thermal head 22 has a structure in which minute heating elements are arranged one-dimensionally along a printing line on a substrate.

  Next, the thermal head 22 is moved backward by the rack and pinion drive mechanism 23 so that the film F and the color ink ribbon R are separated from each other, while the platen roller 21 is reversed and the film F is raised to the original position. Return. Thereafter, while repeating the above-described transfer operation, colors are overlaid in order of magenta, cyan, and black on the film F to create a desired color image on the film F, and then the color image is fixed on the card S. A primer (adhesive layer) is thermally transferred onto the color image.

  Thereafter, the recorded image on the film F is moved to the front of the heat roller 24 by the rotation of the winding side bobbin 17 or the like. At this time, the leading edge of the card S is aligned with the leading edge of the recorded image on the film F, and the card S and the film F are sent to the retransfer section B in a state of being superimposed.

  In this re-transfer section B, the aligned card S and film F are sandwiched between the heat roller 24 and the pressure roller 25 in a superimposed state, and the heat roller 24 and the pressure heated to 160 to 200 ° C. The recorded image on the film F is gradually transferred onto the surface of the card S while the card S and the film F are conveyed under pressure in cooperation with the roller 25. At this time, the film F pressure-bonded to the surface of the card S is peeled from the card S by a peeling process described later. Further, since the card S heated by the heat roller 24 is warped, the card S is sent to the warp correction unit C and subjected to pressure treatment, and then discharged out of the apparatus 1 in a straight state.

  Hereinafter, the configuration around the retransfer section B in the intermediate transfer type thermal transfer printing apparatus 1 will be described in detail with reference to FIG.

  In the retransfer section B, a pressing roller 25 is fixed so as to be in contact with the card transport line L1, and a heat roller 24 that can be raised and lowered is disposed above the pressing roller 25. In such a configuration, when the heat roller 24 is lowered toward the pressing roller, the image on the film F can be transferred to the card S at the retransfer position 26 at the upper peripheral surface of the pressing roller 25.

  Also, feed rollers 12 and 27 for transporting the card S in the horizontal direction along the card transport line L1 connecting the retransfer position 26 on the pressing roller 25 and the guide groove 13 positioned on the card S supply side, It is fixed to the front and rear of the pressing roller 25 so as to be rotatable. Above these feed rollers 12 and 27, pressure rollers 12a and 27a urged toward the peripheral surfaces of the feed rollers 12 and 27 by plate springs are supported, respectively. Further, photosensors 28 and 29 for detecting the presence of the card S are fixed at positions adjacent to the feed rollers 12 and 27 on the card transport line L1 so as to straddle the card transport line L1.

  A film F is stretched between the heat roller 24 and the pressing roller 25 so that the film transport line L2 is positioned in parallel with the card transport line L1 above the card transport line L1. The film F is moved forward and backward along the film transport line L2 by the cooperation of the bobbins 16 and 17 and the platen roller 21 (see FIG. 1). Further, on the outside of the film conveyance line L2 passing between the heat roller 24 and the platen roller 21, an axial peeling pin 30 having a length corresponding to the width of the film F is fixed in parallel to the surface of the film F. Has been. The peeling pin 30 is installed between the card conveying line L1 and the film conveying line L2 and between the pressing roller 25 and the feed roller 12. In addition, it is preferable that the distance between the peeling pin 30 and the pressing roller 25 is set to a sufficient distance so as to ensure a cooling time before film peeling processing (details will be described later) regarding the card S.

  Next, with reference to FIG. 3, the structure of the motor control means which controls the peeling process of the film F from the card | curd S is demonstrated.

  The motor control means 31 is built in the apparatus 1 and can rewrite data such as a central processing unit 32 having a CPU (Central Processing Unit), a RAM (Random Access Memory), an EEPROM (Electrically Erasable Programmable ROM), and a flash ROM. A ROM (Read Only Memory) or a memory unit 33 constituted by a RAM is included. The central processing unit 32 controls the operation of the entire apparatus 1 by reading the program code and data stored in the memory unit 33.

  Further, stepping motors M1 to M5 are electrically connected to the central processing unit 32, and the central processing unit 32 rotates each of the stepping motors M1 to M5 by sending a control pulse signal to the stepping motors M1 to M5. Control the angle and direction of rotation. Here, the stepping motors M1 and M2 are connected to the feed rollers 12 and 27 through driving means such as belts and gears, and rotate the feed rollers 12 and 27. The stepping motor M3 is coupled to the platen roller 21 and rotates the platen roller 21. The stepping motors M4 and M5 are motors for rotating the bobbins 17 and 16, respectively.

  Further, photosensors 28 and 29 are electrically connected to the central processing unit 32, and the central processing unit 32 is on the card transport line L1 of the card S by a detection signal sent from the photosensors 28 and 29. The presence is detected, and the rotation of the stepping motors M1 to M5 is controlled according to the presence.

  Next, the film peeling method in the intermediate transfer type thermal transfer printing apparatus 1 configured as described above will be described with reference to FIGS. The state shown in FIG. 4 is a standby state before image retransfer from the film F to the card S. The feed roller 12 is driven by the forward rotation of the stepping motor M1 under the control of the motor control means 31, and the card S is moved to the card S. It is in a state where it has been transported to a position just before the re-transfer position 26 of the transport line L1 and stopped. In this state, the color image has already been thermally transferred to the surface of the film F by the recording unit A, and the heat roller 24 is raised and stands by for retransfer of the color image to the card S.

  Thereafter, at the image re-transfer stage, the platen roller 21 and the take-up bobbin 17 are driven by the normal rotation of the stepping motors M3 and M4 under the control of the motor control means 31, as shown in FIG. The front end of the image is conveyed to just before the retransfer position 26, and the front end of the image on the film F and the front end of the card S are aligned.

  Next, as shown in FIG. 6, the film F is sandwiched between the heat roller 24 and the pressing roller 25 by the lowering of the heat roller 24, and the feed roller 12 is driven by the normal rotation of the stepping motor M1 under the control of the motor control means 31. Then, the card S continues to advance past the retransfer position 26. At this time, the card S is conveyed with the heat roller 24 pressed against the surface of the film F, images are sequentially transferred from the front end of the card S, and the film F and the card S are integrated with each other. Move L1 forward. Further, the winding-side bobbin 17 continues to convey the film F from the winding-side bobbin 17 toward the retransfer position 26 by the reverse rotation of the stepping motor M4 under the control of the motor control means 31. Thereby, when the card | curd S advances, the state in which the film F was affixed on the card | curd S surface is maintained.

  Further, as the feed roller 27 is driven by the normal rotation of the stepping motor M2 under the control of the motor control means 31, as shown in FIG. 7, the further advance of the card S is maintained. This forward rotation of the stepping motor M2 is continued until the entire surface of the card S passes the retransfer position 26 and the image is completely retransferred to the entire surface of the card S (the image transfer step). Thereafter, the heat roller 24 is raised as indicated by a two-dot chain line to complete the retransfer process, and the clutch 34 disposed between the stepping motor M4 and the take-up bobbin 17 is released, and the take-up bobbin 17 The film F can be sent out from.

  Thereafter, as shown in FIG. 8, the feed roller 27 is driven by the reverse rotation of the stepping motor M2 under the control of the motor control means 31, and the rear end of the card S (the right side of the card S in FIG. Until the card S comes, the card S is transported backward on the card transport line L1. The platen roller 21 and the delivery-side bobbin 16 are rotated by reversing the stepping motors M3 and M5 under the control of the motor control means 31, and the film F passes through the platen roller 21 to the delivery-side bobbin 16 side. It is gradually withdrawn and conveyed (reverse conveyance step). The backward movement of the card S and the return conveyance of the film F by the motor control means 31 are alternately and intermittently performed while the film F is stuck on the entire surface of the card S.

  As shown in FIG. 9, when the rear end of the card S reaches the position of the peeling pin 30 due to the retreat of the card S, the feed roller 27 and the platen roller are rotated by the reverse rotation of the stepping motors M <b> 2 and M <b> 3 under the control of the motor control unit 31. 21 are simultaneously driven continuously (film peeling step). In this case, when the surface of the card S passes below the peeling pin 30, the film F is pulled back toward the platen roller 21 while being hooked on the front peripheral surface of the peeling pin 30 from the rear end side of the card S. Be transported. Accordingly, a force that pulls upward from the rear end of the card S acts on the film F, and the film F is gradually peeled from the rear end to the front end of the card S. At this time, the motor control means 31 controls the rotation speeds of the stepping motors M2 and M3, and the rotation speed of the feed roller 27 (reverse conveyance speed of the card S) and the rotation speed of the platen roller 21 (retraction conveyance speed of the film F). By making the same, the peeling angle of the film F from the surface of the card S is stably maintained at a predetermined angle.

  Further, when the rear end of the card S reaches the feed roller 12 during the above-described peeling process, the film F from the card S is rotated by the feed roller 12 which continues to rotate by the reverse rotation of the stepping motor M1, as shown in FIG. The peeling process is continued. In this case, the rotation speed of the feed roller 12 is controlled to be equal to the rotation speed of the feed roller 27. Thereafter, as shown in FIG. 11, the motor control means 31 controls the rotation of the motors M1, M3, and M5 until the film F is completely peeled from the card S, and the card S moves backward and transports the film F back. Perform (the film peeling step). Then, the card S is sent out toward the reversing unit 4 (see FIG. 1). After the reversing unit 4 reverses the front and back of the card S, the retransfer unit B retransfers the image to the back surface of the card S. . When double-sided printing of the card S is not necessary, after the film F is completely peeled off from the card S, the feed rollers 12 and 27 are driven to drive the card transport line L1 and the warp correction unit C (see FIG. 1). ), The card S may be discharged to the outside.

  Here, with reference to FIG. 12, the above-mentioned backward conveyance step and film peeling step are demonstrated in detail. 12A and 12B are diagrams showing temporal changes in control signals and detection signals transmitted and received by the motor control means 31, wherein FIG. 12A shows a control pulse signal for driving the platen roller 21, and FIG. 12B shows a feed roller. (C) is a detection signal of the rear photo sensor 28 (see FIG. 2) in the card transport line L1, and (d) is a front photo sensor 29 (in the card transport line L1). A detection signal (see FIG. 2) and (e) show a control pulse signal for driving the delivery-side bobbin 16. Here, the number of intermittent operations of the backward conveyance of the card S and the reverse conveyance of the film F in the backward conveyance step is three.

  As shown in FIGS. 8 and 12, in the reverse conveyance step (ST1), first, a control pulse signal Ct1 for driving the feed rollers 12 and 27 is sent from the motor control means 31 toward the motors M1 and M2. The Thereafter, after the control pulse signal Ct1 is turned off, the control pulse signal Ct2 for driving the platen roller 21 is sent from the motor control means 31 toward the motor M3. Thereafter, the control pulse signals Ct1 and Ct2 are alternately and intermittently transmitted three times. The number of pulses included in the control pulse signal Ct1 is such that the rotational distance of the feed rollers 12 and 27 by one control pulse signal Ct1 is 1 / of the distance D1 between the retransfer position 26 and the peeling pin 30 (see FIG. 8). 3 is set. That is, the rear end of the card S is set so as to be conveyed backward from the retransfer position 26 to the peeling pin 30 by sending out the intermittent control pulse signal Ct1 three times by the motor control means 31.

  The control pulse signal Ct2 is set so that the rotation distance of the platen roller 21 is slightly smaller than the rotation distance of the feed rollers 12 and 27 by the control pulse signal Ct1. Thereby, when the card S is moved backward, the amount of looseness of the film F at the rear end of the card S can be reduced, so that the subsequent film peeling process is performed smoothly. In the backward conveyance step, when the photo sensor 29 (see FIG. 2) detects the card S, a detection signal Sg2 is transmitted to the motor control means 31.

  In the subsequent film peeling step (ST2), the control pulse signals Ct1 and Ct2 are continuously sent out simultaneously by the motor control means 31. In this case, the number of pulses included in the control pulse signals Ct1 and Ct2 is set so that the transport speed of the card S and the transport speed of the film F are the same. Further, a control pulse signal Ct3 for driving the sending-side bobbin 16 is also sent out superimposed on the sending of the control pulse signals Ct1 and Ct2. This control pulse signal Ct 3 is sent out to wind up the slack of the film F on the sending side bobbin 16 caused by the drawing-back conveyance of the film F by the platen roller 21 around the sending side bobbin 16. In the film peeling step, when the photosensor 28 (see FIG. 2) detects the card S, a detection signal Sg1 is transmitted to the motor control means 31. Thereby, the motor control means 31 detects that the conveyance state of the card | curd S is normal.

  In the intermediate transfer type thermal transfer printing apparatus 1 described above, after the film F is pressed against the surface of the card S by the heat roller 24 and the image is thermally transferred, the film S and the film F are integrated with each other. The card S is transported backward toward the peeling pin 30 disposed outside the transport line L2. Thereafter, the film F is peeled from the rear end of the card S by being pulled back and conveyed while being hooked on the peeling pin 30. In this case, since the reverse conveyance of the card S and the reverse conveyance of the film F are alternately and intermittently performed after the image thermal transfer until the film peeling, the card S and the film F are continuously conveyed. In comparison with this, the range of the slack amount of the film F at the rear end of the card S can be easily maintained within a predetermined range. Thereby, the shift | offset | difference from the conveyance path L1 of the card | curd S and the catch in the edge part of the card | curd S of the film F can be prevented. As a result, film peeling after image transfer to the card can be stably performed.

  Further, in the film peeling step, since the reverse conveying speed of the card S and the rotation speed of the platen roller 21 are the same, the peeling angle of the film F with respect to the surface of the card S when the film F is peeled can be stabilized. Further, chipping and burrs of the transferred image after peeling off the film F can be effectively prevented.

  Further, in the film peeling step, the card S is continuously retracted and the film F is pulled back until the film F is completely peeled from the surface of the card S. Is completed, the processing for each card S can be performed efficiently. In particular, when it is necessary to perform transfer processing on both sides of the card S, it is advantageous because the reciprocation of the card S on the transport line L1 is essential.

  In addition, this invention is not limited to embodiment mentioned above. For example, the driving means for the feed rollers 12 and 27 and the platen roller 21 is not limited to the stepping motor, and other electric motors such as a DC motor may be used.

  Alternatively, the peeling process may be performed while changing the peeling angle of the film F from the card S by providing a difference between the retreating speed of the card S and the rotational speed of the platen roller 21.

1 is a front view showing an embodiment of an intermediate transfer type thermal transfer printing apparatus according to the present invention. It is a front view which shows the structure of the retransfer part periphery in the thermal transfer printing apparatus of FIG. It is a schematic block diagram which shows the motor control means in the thermal transfer printing apparatus of FIG. It is the schematic which shows the state in which the card | curd which is a recording medium was conveyed just before the retransfer position. It is the schematic which shows the state by which the front end of the film was conveyed to the retransfer position. It is the schematic which shows the state by which the retransfer process was started. It is the schematic which shows the state which the retransfer process was complete | finished. It is the schematic which shows the state which a card reverse | retreats with a film. It is the schematic which shows the state by which the peeling process of the film from a card | curd was started. It is the schematic which shows the state in which the peeling process of the film from a card | curd is continued. It is the schematic which shows the state in which the card | curd is conveyed after completion | finish of the peeling process of the film from a card | curd. It is a figure which shows the time change of the control signal and detection signal which are transmitted / received in the motor control means of FIG. 3, (a) is a control pulse signal which drives a platen roller, (b) is a control pulse which drives a feed roller. (C) is a photosensor detection signal behind the card transport line, (d) is a photosensor detection signal in front of the card transport line, and (e) is a control pulse signal for driving the delivery-side bobbin. is there.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Intermediate transfer type thermal transfer printer, 12, 27 ... Feed roller, 21 ... Platen roller, 24 ... Heat roller, 26 ... Retransfer position, 30 ... Release pin, 31 ... Motor control means, F ... Film, L1 ... Card Transport line (medium transport line), L2 ... film transport line, M1, M2 ... stepping motor (medium transport motor), M3 ... stepping motor (film transport motor), R ... color ink ribbon, S ... card (recording medium) ).

Claims (3)

By the cooperation of the thermal head and the platen roller, an image is thermally transferred to the film based on the color arrangement on the ink ribbon, and the film is pressed against the recording medium while being heated by the heat roller. A film peeling method in an intermediate transfer type thermal transfer printing apparatus for retransferring an image on a film,
An image transfer step of thermally transferring an image by pressing the film against the surface of the recording medium by the heat roller while moving the recording medium forward;
After the image transfer step, while the platen roller is rotated and the film is pulled back toward the platen roller, the peeling pin disposed outside the film conveyance line between the heat roller and the platen roller A backward conveying step for retracting the recording medium toward the
A film peeling step of peeling the film from the rear end of the recording medium while the film is pulled back and conveyed toward the platen roller, and the film is hooked on the peeling pin;
With
The film peeling method in the intermediate transfer type thermal transfer printing apparatus, wherein before the film peeling step, in the backward feeding step, the backward feeding of the recording medium and the reverse feeding of the film are alternately and intermittently performed.   2. The film peeling method in the intermediate transfer type thermal transfer printing apparatus according to claim 1, wherein in the film peeling step, the backward conveyance speed of the recording medium and the rotation speed of the platen roller are substantially the same.   3. The intermediate transfer type thermal transfer printing according to claim 1, wherein in the film peeling step, the recording medium is continuously retracted and the film is pulled back until the film is completely peeled from the surface of the recording medium. The film peeling method in an apparatus.

Images