JPS6154968A - Transfer type thermal recorder - Google Patents

Abstract

PURPOSE:To raise the quality of printing by suppressing the occurrence of uneven densities during the transfer period as much as possible by equalizing the position, speed and angle of separation by the connected actions of a separation position-regulating roller and a separation condition-regulating roller. CONSTITUTION:1DF3 and a recording paper 10 are passed in a lapped state between a separation roller 4 and a separation position-regulating roller 11, and 1DF3 is fed to a guide roller 6 and separated and the paper 10 is fed along a paper guide 13 and separated. The paper 10 on the roller 4 can be separated at a fixed position all the time by the roller 11. The paper 10 is further fed along the guide 13 and goes into the aperture between both rollers of the separation condition-regulating roller 14. Both rollers are turned in a pressingly contact state at a fixed speed, e.g., at a speed slightly faster than the feeding speed of 1DF3 on the roller 4, and the paper 10 is taken out at the fixed speed from between the roller 4 and the roller 11 for feeding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to transferring ink of a thermal transfer recording medium, which is melted according to image information, onto a recording sheet that is conveyed while being overlapped with the thermal transfer recording medium. In particular, in relation to a transfer type thermal recording device in which the recording paper is peeled off by guiding the recording paper in a direction different from that of the thermal transfer recording medium after recording is performed by This invention relates to a device that completely prevents the accompanying deterioration of print quality.

[Conventional technology]

FIG. 2 schematically shows the recording section of a conventional transfer type thermal recording device, which includes a thermal head 1, a platen row 22, a thermal transfer recording medium 3, a peeling roller 4, a feed roller 5,
6, 7, and peno arm guides 8, 9. The thermal head 1 has a heating resistor that is selectively driven according to image information, and is pressed against the platen roller 2 at a predetermined pressure. The thermal transfer recording medium (hereinafter referred to as ink donor film 2, abbreviated as IDF) 3 interposed between the thermal head 1 and the roller 22 is made by completely coating solid ink on an extremely thin base paper such as polyester film or capacitor paper. l Peeling roller 4. f!
The hook is passed through the idler 25.6 and wound around an IDF supply roller and a take-up roller (not shown) at both left and right ends of the figure, respectively. In this state, recording paper 1 is fed from the left side of the figure.
0 reaches between the platen roller 2 and the IDF 3, the take-up roller is rotated, and the IDF 3 is taken up and conveyed in the direction of the arrow. At this time, the recording paper 10
is overlapped with the IDF 3 by the pressing force of the platen row 22 on the thermal radar 1, and is conveyed between the two.

At the same time, the low heat generation antibody of the thermal head 1 selectively generates heat according to the image information, and the ink of the IDF 3 melted by the heat generation is transferred to the recording paper 10, thereby transferring the image information. A record is made. Thereafter, the IDF 3 is conveyed along the circumferential surface of the peeling row 24 toward the winding roller. Meanwhile, until then, the IDF 3
The recording paper 10, which had been conveyed in a superimposed manner, is now guided between the paper guides 8 and 9 in a direction different from the conveyance direction of the IDF 3, and after being peeled off from the ID 13, passes through the guide roller 7. is discharged. Such a transfer-type thermal recording device has a simple configuration and a high recording speed, and is now widely used in copying machines and the like.

[Problems that the invention helps solve]

As described above, in the conventional transfer type thermal recording device, there is no structure for regulating the movement of the recording paper 10 in the conveying portion of the recording paper 10 related to peeling, and the recording paper 10 is simply guided in a direction different from the IDF 3. Peeling was performed by shaking the material. Therefore, depending on the stiffness of the recording paper 10, the recording paper 10 between the page 74 and the guides 8 and 9 is given a large degree of freedom of movement from the position shown by the dotted line to the position shown by the solid line. Since the peeling speed is not constant, there is a problem in that recording density becomes uneven and print quality is significantly impaired.

[Means and operations for solving the problem] Therefore, in the present invention, a paper peeling position regulating roller rotatably pressed against the circumferential surface of the peeling roller, and a record that passes between the paper peeling position regulating roller and the peeling roller are provided. It is equipped with a paper ejection condition regulating roller that can apply tension to the paper so that the recording paper is conveyed in a fixed direction and at a fixed speed, and the roller always peels off the recording paper at a fixed position, and also peels off the recording paper at a fixed position from this position. The above-mentioned objective is achieved by conveying and discharging in a certain direction and at a constant speed.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an overall structural diagram showing one embodiment of the present invention, and parts having the same functions as those of the conventional device shown in FIG. 2 are designated by the same reference numerals. A paper peeling position regulating roller 11 which is pressed against the surface of the peeling roller 4 at a predetermined pressure as a new groove bottom of the present invention apparatus shown in FIG. A paper peeling condition regulating roller 12 consisting of a pair of rollers disposed in the path and rotatably pressed against each other, and paper guides 13 and 14 extending along the paper discharge conveyance path are provided.

The peeling operation in this apparatus will be described in detail below in the context of the overall recording operation flow. First, when a recording start operation is performed, one of the recording sheets 10 stacked in the paper feed tray 15 is transferred between the grating roller 22 and the IDF 3 as the paper feed roller 16 rotates. The data is supplied up to just before the recording position in between. From this timing, the motor 17 moves the peeling roller 4, which is connected to the motor 17 via a timing belt 18, 19, and the IDF take-up roller 20 to feed the IDF feed roller 21 to the IDF take-up roller 20. The thermal head 1, two platen rollers, a peeling roller 4, a guide roller 5,
At step 6, the conveyance of the delivered IDF3 is started. Here, as the IDF 3 is conveyed, the recording paper 10 is overlapped with the IDF' 5a by a pack glacier applied from the platen roller 2 to the thermal head 1, and transferred to the thermal head 1 and the platen. The thermal head 10, which is conveyed between the rollers 2 and driven in accordance with image information, receives the transferred ink of the melted IDF 3 at a predetermined heat generating location. Thereafter, both the vaginas (IDF 3 and recording paper 10) pass between the peeling roller 4 and the peeling position regulating roller 11 while being overlapped, and the ID
F3 is conveyed in the direction of the guide roller 6, and the recording paper 10 is conveyed in different directions along the -i4 guide 13 and peeled off.

By this peeling position regulating roller 11, the peeling roller 4
The upper recording paper 10 can always be peeled off at a fixed position. In this way said! The recording paper 10 peeled off from the DF 3 is further conveyed along the paper guide 13 and enters between both rollers of the paper peeling condition regulating roller 4.

Both rollers are rotated at a constant speed, for example, slightly faster than the conveyance speed of the IDF 3 on the peeling roller 4, while being in pressure contact with each other. It functions to tension and transport the paper 10 from between the peeling roller 4 and the peeling position regulating roller 11 at the constant speed. Therefore, with the apparatus of the present invention, it is possible to achieve uniformity of the peeling speed and peeling angle as well as the above-mentioned constant peeling position, which can greatly contribute to reducing density unevenness during peeling.

The recording paper 10 conveyed by the paper peeling condition regulation roller 12 then passes over the guide roller 7 along the paper guide 14 and is discharged onto the paper discharge tray 22.

〔Effect of the invention〕

As explained above, according to the transfer type thermal recording apparatus of the present invention, the peeling position, peeling speed, and peeling angle can be made uniform by the cooperative operation of the peeling position regulating roller and the peeling condition regulating roller. As a result, the occurrence of density unevenness during transfer due to variations in peeling conditions can be suppressed as much as possible, and the printing quality can be significantly improved.

[Brief explanation of drawings]

! Fig. 1 is an overall structural diagram of a transfer type thermal recording device showing an embodiment of the present invention, and Fig. 2 is a diagram showing the structure of the vicinity of the recording section in a conventional transfer type thermal recording device. 2...Platen roller, 3...Thermal transfer recording medium (IDF), 4...Peeling roller, 5°6.7...
Guide rollers, 8, 9, 13. 14...Paper guide, 10...Recording paper, 11...Paper peeling position regulating roller, 12...Paper peeling condition regulating roller, 15...
Paper feed tray, 16... Paper feed roller, 17... Motor, 18, 19... Timing belt, 2o... ID
F take-up roller, 21... IDF supply roller, 22...
・Paper output tray. Figure 1/Figure 2

Claims (1)

[Claims] After transferring the ink of the thermal transfer recording medium, which is melted at a heating point according to the image information of the thermal head, to the recording paper that is conveyed in a superimposed manner with the thermal transfer recording medium, the recording paper is conveyed over the circumferential surface of a peeling roller. In a transfer type thermal recording device, the recording paper is peeled from the thermal transfer recording medium by guiding the recording paper in a direction different from that of the thermal transfer recording medium, and the recording paper is rotatably pressed against the circumferential surface of the peeling roller. a paper peeling position regulating roller, and paper ejection conditions that can apply tension to the recording paper that has passed between the paper peeling position regulating roller and the peeling roller so that the recording paper is conveyed in a constant direction and at a constant speed. A transfer type thermal recording device characterized by comprising a regulating roller.