JPS6023079A - Heat transfer recorder - Google Patents

Abstract

PURPOSE:To enable to release an ink sheet and a recording paper from each other in the condition wherein the adhesive force of a thermally transferred ink is sufficient, by releasing the ink sheet and the recording paper from each other in the condition wherein the thermally transferred ink is not solidified. CONSTITUTION:A heater 6 is provided in the interior of a hollow platen roller 4, and the heater 6 is operated at the time of recording to provide the platen roller 4 with such a surface temperature that the thermally transferred ink is heated. In this condition, the ink sheet 1 and the recording paper 2 are fed to a releasing position B, and are released from each other by a releasing plate 5, thereby performing heat transfer recording.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a thermal transfer recording device with improved means for separating recording paper and ink sheet after thermal transfer.

BACKGROUND ART Generally, as shown in FIG. 1, a thermal transfer recording device uses an ink sheet 1 as a recording medium, in which heat-melting or heat-sublimating ink is coated and dried on a °C film base. The ink sheet 1 and the recording paper (plain paper) 2 are generally fed in the sub-scanning direction, and the ink sheet 1 and the recording paper are placed between the recording hect 3 in which a plurality of recording elements are arranged in one line in the main scanning direction and the platen row 24. 2 is brought into pressure contact with the ink sheet 1. After the thermal transfer, the ink sheet 1 is transferred to the ink sheet 1 by a peeling plate 5 provided at a position i1B at a distance g+r from the recording position A. and the recording paper 2 are separated. The recording head 3 is of the direct heating type, which uses a heating element for the recording element, and also the thermal head, which uses a heating element for the recording element. In the method 5) that utilizes Joule heat, a head equipped with a multi-needle electrode, a return electrode, and a complete head is used. Conventionally, in this type of thermal transfer recording device, thermally transferred ink was The ink is rapidly cooled and solidified and adheres to the recording paper 2 and is conveyed to the peeling position B, but the solidified ink cannot be plastically deformed, and vibrations during conveyance and ink sheet 1 It is easy to peel off due to thermal shrinkage of the film base or expansion and contraction of the recording paper 2 due to temperature changes. At that time, if recording paper 2 with a highly smooth hard surface is used, the adhesion of the thermally transferred and solidified ink becomes particularly weak, and the thermally transferred ink is peeled off when peeled off, causing dots to appear on the recorded image. There is a high possibility that this will occur. In addition, in an area where the number of recorded dots is very small, the ink sheet 1 and recordings # and 2 maintain contact with each other and are conveyed to point B of peeling #11 with only a few dots. During this time, the thermally transferred ink will be peeled off due to the vibration NIIJ during feeding. In particular, such ink peeling becomes noticeable when color recording is performed by sequentially overlapping and transferring valley inks of three primary colors by subtractive color mixing, and the difference in aggregation when the ink solidifies makes it difficult to remove it later. The ink that has been thermally transferred in layers is likely to peel off.

Conventionally, therefore, the thermal transfer energy is sufficiently increased to strengthen the adhesion of the ink thermally transferred to the recording paper 2. However, on the other hand, the influence of heat accumulation in the recording head 3, the increase in the winding load of the ink sheet 1, and the film This has caused problems such as foreign matter getting into the ink due to melting of the base.

Purpose The present invention has been made in consideration of the above points, and provides a thermal transfer recording device that prevents ink thermally transferred onto recording paper from peeling off. An embodiment of the invention will be described in detail with reference to .

In the thermal transfer recording apparatus according to the present invention, the distance l' between the recording position A and the peeling position B' is shortened to the mechanically permissible limit at fJ:5 shown in FIG. Before the thermally transferred ink cools down and solidifies, the curvature Pj
The iF is used to separate the ink sheet 1 from the recording paper 2.

FIG. 3 shows another embodiment of the present invention. In this case, a heater 6 is provided inside the hollow platen roller 4 in the structure VC shown in FIG. (The heater 6 is set to j+i) so that the platen surface temperature is 0 and the ink thermally transferred to the hot dust is heated to fi, λ.
The ink sheet 1 and the recording paper 2 are engraved up to the jsl 111 qi position B in the heated and kept warm state at 7/'%, and then peeled off.
; Peel off the ink sheet 1 and the recording paper 2 using the IF board 5.
In the figure, 7 and 8 indicate heater 5 (7) Connect the heater 1 source between both terminals (provided on the rotating shaft of the platen roller 4).
) each shows an anti-spring contact. in this case,
The surface MJl of the platen roller 4 is set to be lower than the bath melting degree ttA of the ink on the ink sheet 1. At this time, it is also possible to use a sensor Kj to detect the top degree of the platen roller 4 and perform j+8 quasi-control of the heater 5 so that the temperature of the platen roller 4 is always maintained at the temperature e. FIG. 4 shows still another embodiment of the invention. In this case, an infrared lamp 9 is provided at one place on the platen roller 4, and the infrared lamp 9 is turned on during recording to increase the temperature of the surface of the platen roller 4. In this way, the ink sheet 1 and the recording paper 2 are conveyed to a peeling position B in a state where the thermally transferred ink is heated and kept warm, and the two are completely peeled off there. Even in this case, it is necessary to set the surface temperature of the platen roller 4 to be lower than the ink melting temperature.

FIG. 5 shows another embodiment of the present invention, in which a heating belt 10 is provided between the recording head 3 and the peeling plate 5, and the heating belt 10 The thermally transferred ink is heated and kept warm while being conveyed and peeled off from the ink sheet 1 and paper 2 to the complete peeling plate 5. Note that heating belt 10
At least one of the feed rollers 11 and 12 has a built-in heater, and the heating belt 10 has good thermal transfer properties. c It is shaped and made of materials. Even in this case, the heating temperature by the heating belt 10 is lower than the ink melting temperature. It is necessary to set it to c5.

As described above, in the heat transfer device according to the present invention, the thermally transferred ink can be moved to a predetermined position immediately after the thermal transfer but before the thermally transferred ink cools and solidifies, or while the thermally transferred ink is heated and kept warm to prevent it from solidifying. Since the ink sheet 1 and the recording paper 2 are separated by conveyance, the ink sheet 1 and the recording paper 2 can be separated 1Iflt in a state where the adhesion of the thermally transferred ink is sufficient. This makes it possible to prevent ink from peeling off during peeling. In addition, even if the ink sheet 1 and the recording paper 2 are transported to a total separation position of 1iB after thermal transfer, the thermally transferred ink is still in a state where it is not solidified and can be plastically deformed. Ji! I
(It is possible to sufficiently cope with thermal shrinkage of a and the film base or expansion and contraction of the recording paper 2 due to temperature changes, so that the ink does not peel off.When performing color recording by overlapping transfer on 11k, It is possible to effectively prevent the overlappingly transferred ink layers from peeling off.

As described above, the thermal transfer recording device according to the present invention is provided with a means for separating the ink sheet and the recording paper in a state where the thermally transferred ink is not solidified, so that thermal transfer can be performed without increasing thermal transfer energy. It has the excellent advantage that the ink sheet and the recording paper can be peeled off in a state where the +i force of the ink is sufficient, and that the peeling of the ink during the peeling can effectively eliminate VC. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing the configuration of a platen roller and recording head portion in a conventional thermal transfer recording device, and FIG. 2 is a platen roller and recording head portion of a thermal transfer recording device according to an embodiment of the present invention. FIG. 3 is a front cross-sectional view of a platen roller in another embodiment of the present invention, and FIG. 4 is a platen roller fabricated recording head showing still another embodiment of the present invention. FIG. 5 is a side view of a platen roller and recording head portion showing still another embodiment of the present invention. 1... Ink sheet 2... Recording paper 3... Recording head 4... Platen roller 5... f&l p
ilj board 6... heater 9... infrared lamp 1
0... Heating belt out ≦! Person a agent Xk I T1
Qi Mu Fig. 1 Fig. 4 Fig. 3 Fig. 4

Claims (1)

[Claims] In a device that performs recording by thermal transfer while the ink sheet and recording paper are brought into pressure contact between the recording head and the platen, the ink sheet and the recording paper are separated before the thermally transferred ink solidifies.F! Thermal transfer recording device O characterized by the provision of i