JPS5967065A - Transfer type heat sensitive recorder - Google Patents

Abstract

PURPOSE:To make the good fixing not changing the fixing degree according to its color without confusing the recording picture plane, by heating the recording paper from the back surface of recording picture plane. CONSTITUTION:A heat source body 11 is kept at a temperatue higher than the melting point of thermal fusible ink by applying an electric current to resistors such as filament 11a and the like, the thermal fusible ink cohering on the surface of recording paper 1 being fused by reheating it, sufficiently impregnated between fibers of recording paper and fixed to the record preventing from flaws and omissions. Because the recording surface is in contact with nothing until the fixing of record is ended by providing the heat source body 11 on the back surface of recording paper 11, the fixing can be carried out without confusing the recording picture plane. Further, paper overrun rollers 12 and 13 feed the recording paper sticking the recording paper 1 fast to the heat source body 11 without being in contact with the record surface in the midway of fixing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention prevents recorded images, which are recorded by transferring heat-melting ink applied to a film onto recording paper, from falling off or being scratched due to surface abrasion, etc. The present invention relates to a transfer type thermal recording device that has a fixing section that fixes the image so that it does not occur.

Transfer-type thermal recording is a process in which hot bath-fusible ink, which melts at high temperatures and solidifies at room temperature, is applied to a thin film base such as polyester or condenser paper, and the ink surface is the same as the recording paper. This is a recording method in which the hot bath meltable ink is transferred onto the entire recording paper by overlapping the ink film with the recording paper and completely heating the thermal head according to the recorded image from above the ink film, thereby obtaining the entire recording screen.

The hot bath fusible ink transferred to the recording paper by this method is
Since the ink does not fully penetrate into the recording paper and is simply fused to the surface of the recording paper, if the recording direction is rubbed, the hot-melt ink may be scraped off, causing damage or falling off. be. In order to eliminate all of these inconveniences, the transferred hot-melt ink is heated and melted in a bath, allowing it to fully penetrate between the fibers of the recording paper and fixing the entire recording screen to prevent scratches or ink from falling off. What is done is done.

As heating means for this fixing, the following six methods are mainly considered. The first is a heating method using radiant heat, using a xenon flash lamp as the heat source.
This heating method uses an infrared lamp or similar tray to irradiate the recording screen with radiant heat. With this method, since the ink has a high absorption rate of radiant heat, only the ink is heated up and the recording paper remains cold, so the ink melts but does not penetrate into the recording paper very much. do not. If the 1t1 recording screen is multicolored, it has many drawbacks, such as the ink having different absorption rates depending on the color and uniform fixation cannot be obtained, and is completely blind, which is impractical. The second method is to blow hot air on the recording screen,
The fixing is good, but the noise is loud because the power is sent to the air. Disadvantages: The device is complicated and large, and the device becomes completely blind. The third one is transfer heat? In this method, a heat source is brought into pressure contact with the recording screen to heat it. Conventionally, a heat source is provided on the side of the recording surface where the ink is attached, and in order to avoid filling the entire recording surface, the surface of the heat source must have a high affinity for the heat-melting ink. It was troublesome because we had to devise ways to prevent the relative speed from occurring.

The present invention was made to eliminate these drawbacks, and by heating the recording paper from the back side of the recording screen, good fixing can be achieved without disturbing the recording screen and the degree of fixation does not change depending on the color. The present invention provides a complete transfer type thermal recording device capable of performing the following steps. Hereinafter, an embodiment of the present invention will be explained in detail along with the details.

In the figure, numeral 1 indicates a recording paper, and arrow X indicates its feeding direction. 8 shows a transfer type thermal recording section, which performs recording by transferring hot bath-meltable ink onto recording paper according to image information. B (thermal fixing section), which is recorded by the transfer-type heat-sensitive recording section A, applies heat to the perforated recording paper 1 from the back side to fix the rainbow recording screen, and fixes scratches such as ink falling off due to surface rubbing etc. Obtain a stable screen that does not occur.

2 is a hot bath melting ink film, in which a heat melting ink that melts at high temperatures and solidifies at room temperature is coated on a thin film base such as polyester or condenser paper. The heat-melting ink film 2 is wound around a supply reel 3, guided by a guide roll 5, overlapped with the recording paper 1 so that the ink side is in contact with the recording paper 1, and sent to the thermal head 1o and the Hiflaten 9. The thermal head 1
゜ is a device in which a large number of invented resistors are usually formed on a substrate such as ceramic, and by selectively energizing the heating resistors according to image information, heat is generated in a predetermined heat pattern, and the heat-fusible ink film 2 is heated. Heat. At this time, the platen 9 has the effect of making the thermal head 1o and the heat bath positive ink film 2 compatible and making it easier to transfer heat. The heat-fusible ink film 2 is heated so that the hot-fusible ink that is in contact with the recording paper 1 is melted in the bath and fused onto the recording paper, and then peeled off from the recording paper 1 by a peeling roll 6 and rolled up. It is wound onto reel 4. At this time, the heat-fusible ink is transferred onto the recording paper 1 only in the portion heated by the thermal head 10, and the remaining portion is transferred to the hot bath-fusible ink film 2.
It is also wound onto the take-up reel 4. As described above, at the exit of the transfer type thermal recording section A, the heat-melting ink is transferred onto the surface of the recording paper according to the recording screen.

Reference numeral 11 denotes a heat source, which is maintained at a temperature higher than the melting point (approximately 70°C) of the heat-fusible ink by energizing a resistor such as a filament 11a, and the heat-fusible ink fused to the surface of the recording paper. It is melted by reheating and sufficiently penetrates between the fibers of the recording paper, resulting in a record that is resistant to scratches and falling off. The feature of the present invention is that the heat source 11 is provided on the back side of the entire recording paper, and by doing so, nothing comes into contact with the recording surface until the fixing of the record is completed, so the entire fixing can be performed without covering the entire recording screen. I can do things. In addition, since the heat source 11 is provided on the back side of the recording paper, if the coefficient of friction with the recording paper made of metal or the like with an interface finish is made small, there is no need to rotate the heat source 11 in accordance with the feed V of the recording paper. do not have. 12,1
Three paper feed rollers feed the recording paper while bringing the recording paper 2 into close contact with a heat source 11 without contacting VrC on the recording surface in the middle of the foot layer.

As described above, according to the present invention (for example, since the transfer type thermal recording is heated by the surface force of the entire length, the paper feeding speed and the speed of the heat source surface are all synchronized so as not to cover the entire recording screen, Further, the transfer type thermal recording layer can be applied in an extremely easy manner without special measures such as using a material that is repellent to hot bath melting ink.

In the above explanation, a method using transfer heat was shown as a heating method, but it is easily possible to apply it to two other methods, namely, a method using radiant heat and a method using hot air. In other words, if the back side of the recording paper is treated to have a cylindrical radiant heat absorption rate and radiant heat is irradiated from the back side, the recording paper will be heated first, so the fixing performance will be the same as above, and this method can also be used for multicolor recording. Fixing is done uniformly. Hot air from the back again? By wiping, it has the advantage of completely reducing fixation irregularities due to distance from the spout and preventing ink from flowing due to wind.

[Brief explanation of the drawing]

The drawing shows an embodiment of the present invention, and is a schematic side view of a transfer type thermal recording device. -Recording paper 2...Hot bath meltable ink film 9...Platen 10...Thermal head 11...Heat source 11a...Filament and above Applicant Daini Kozue Kogo Co., Ltd.

Claims (1)

[Claims] The transfer type thermal recording device is characterized by the provision of six heat fixing sections that fix the entire recording screen by heating the recording paper recorded in the thermal recording section B from the back side where there is no recording screen. Device.