JPH04189558A - Magnetic printer - Google Patents

Abstract

PURPOSE:To carry out the printing easily even if magnetic property of a record medium is high so as to record at a high speed and obtain at a low cost by providing a heating mechanism for warming a magnetic belt adjacently to a recording part. CONSTITUTION:At first, the temperature of a magnetic belt 3 is raised to a desired temperature by a heating mechanism 1. A record medium 202 of the magnetic belt is warmed by the heating mechanism together with a support 204, and magnetic property of the record medium is changed thereby. After the completion of a recording process, although the magnetic belt is warmed by the heating mechanism, the magnetic belt is originally thin with a large surface area, so that the heat radiates and returns to the room temperature when it passes through a heating unit of the heating mechanism, providing the room temperature at this side of a developing device. Next, a developing process will be performed. A developing material is supplied to a magnetic latent image part formed by a magnetic head 2 on the magnetic belt 3 at a developer 4 so as to visualize a magnetic latent image. The visualized visible image is moved and transferred to a recording paper 10 by a transfer roller 6. The recording paper 10 holding the transferred image is fixed with heat by a fixing roller 7 so as to make a recorded matter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic printing device for displaying characters, figures, graphs, etc. produced on a screen by a computer or the like on a paper surface.

[Prior Art] As a conventional magnetic printing device, a device using a magnetic drum has been put into practical use, as described in Japanese Patent Publication No. 57-46795 (G8). Also, a method using a magnetic belt in place of the magnetic drum has been proposed, but it has not been put to practical use.

[Problems to be Solved by the Invention] However, the above-mentioned conventional technology has problems in that the recording speed is slow and the device is expensive, which has been a major barrier to the widespread use of magnetic printing devices. To explain the issue in more detail, the magnetic properties of the magnetic recording medium used in magnetic printing devices require that the developer material be held on the surface of the magnetic recording medium during development, and the magnetic energy that can be retained is required to hold the developer material. It becomes necessary. Naturally, it is important to improve the magnetic properties of the magnetic recording medium in order to obtain the leakage magnetic flux necessary to hold the developing material after forming the magnetic latent image. Since the six forces must be made larger, a load is placed on the magnetic head structure, which is not desirable from the magnetic head's perspective. On the other hand, in magnetic printing devices, recording speed is an important factor in addition to write output, and in order to increase the recording speed, the number of magnetic heads must be increased. Specifically, for example, 300D
When printing on A4 size recording paper with PI resolution, A4
Since the width is 210mm, the number of dots is approximately 25.
00 dots, and an ideal full-line type recording head requires that 2,500 magnetic heads exist evenly within 210 mm. Furthermore, to explain the magnetic head in detail, a full line type magnetic head has a length of 210 m.
In order to manufacture 2,500 magnetic heads in 100 m, the outer dimensions of each magnetic head must be ~80 μm or less, and in order to obtain the magnetic output necessary for recording, considering the number of turns of the coil, it is necessary to It is difficult with current technology to keep the size within ~80 μm. Therefore, in the magnetic printing apparatus that has been realized, a method is used to increase the recording speed by rotating the magnetic drum at high speed with a small number of magnetic heads. However, even with this method, the cost of the motor that rotates the magnetic drum at high speed, and the load on the drive unit and control unit such as the encoder to record at a specified position on the high-speed rotating magnetic drum are large, making it difficult to expect a reduction in price. do not have.

The present invention is intended to solve these problems, and its purpose is to easily record even if the magnetic properties of different recording media are uniform. It is located in a place that provides printing equipment.

[Means for Solving the Problems] The magnetic printing device of the present invention has a recording section, a developing section, a transfer section, a cleaner section, and a demagnetizing section installed in sequence in the moving direction of a magnetic heald that moves at a constant speed. The magnetic printing apparatus is characterized in that a heating mechanism for warming the magnetic belt is provided near the recording section.

[Function] According to the above configuration of the present invention, the magnetic belt is warmed before recording by the heating mechanism provided near the recording section, and since the coercive force of the heated recording medium decreases due to temperature characteristics, recording is performed at the time of this decrease. By doing this, even a low-output magnetic head can easily record. Furthermore, low-output magnetic heads have a simple structure, have a small number of turns in the coil, and can accommodate a large number of heads within a certain range, making it possible to achieve high-speed recording without moving the magnetic belt at high speed.

[Example] FIG. 1 is a sectional view of the main parts of the magnetic printing apparatus of the present invention, in which 1 is a heating mechanism, 2 is a magnetic head, 3 is a magnetic belt,
4 is a developing device, 5 is a paper feed roller, 6 is a transfer roller, 7 is a fixing roller, 8 is a cleaning roller, 9 is a demagnetizer, 10
is recording paper.

Each element and step will be explained in sequence using FIG. 1. The first step is a recording step, in which the magnetic belt 3 is first heated to a desired temperature by the heating mechanism 1. Here, FIGS. 2 and 3 will be used for more detailed explanation. FIG. 2 is an enlarged cross-sectional view of the magnetic belt and heating mechanism. The structure of the magnetic belt includes a support 204, a nonmagnetic layer 203, and a recording medium
02, consists of a protective film 201, and the heating mechanism is a support body 204
A heater for heating is in contact with the substrate 207, and the structure of the heater consists of a substrate 207, a heating element 206, and a protective film 205. The recording medium 202, which is a magnetic belt, is heated together with the support 204 by a heating mechanism, and as the temperature increases, the magnetic properties of the recording medium change. FIG. 3 shows cobalt nickel phosphorus (C) as the material of the recording medium.

-Ni-P), and the coercive force decreases as the temperature rises. Therefore, conventionally, in order to write on a recording medium with a coercive force of 600 oersteds (Oe) at room temperature, a magnetic head output of 600 gauss (G) or more (desirable stable write output is about 1800 gauss) is required. This allows writing even with a low-power magnetic head. For example, in the case of the recording medium shown in Figure 3, if the temperature is raised to 13° 0°C, the coercive force of the recording medium will be 300.
Oersted is half of that at room temperature, and the output of the magnetic head can be adjusted accordingly, making it possible to reduce the load on the magnetic head. Next, to explain the magnetic head in more detail, since the write output may be small as described above, a magnetic head as shown in FIG. 4 can be realized. FIG. 4 is a perspective view of the magnetic head, where 402 is a magnetic head and 401 is a magnetic head holder. Since this recording head is constructed by arranging a plurality of magnetic heads in a planar staggered manner, the number of magnetic heads can be manufactured to match the desired 8-bit recording speed. In addition, as is well known, the structure of a magnetic head consists of a magnetic pole and a coil, but as mentioned earlier, since writing is possible at low output, the number of turns in the coil can be reduced, and the shape of the magnetic head can be made as small as possible. This makes it easy to manufacture a line type head. Returning to Figure 1 and explaining the next step again, after the recording process is completed as described above, the magnetic belt is heated by the heating mechanism, but since the magnetic belt is originally thin and has a large surface area, the heat generating part of the heating mechanism is heated. As it passes through, the heat dissipates and returns to room temperature, so the temperature reaches room temperature before the developing device. Next, the developing process begins. A developing device 4 supplies a developer material to a magnetic latent image portion formed by a magnetic head on a magnetic belt to visualize the magnetic latent image. The visualized image moves and is transferred to the recording paper 10 at the transfer port 6. The self-recording paper 10 retains the transferred image and is thermally fixed by the fixing roller 7 to produce a recorded matter. On the other hand, the magnetic belt 3 continues to transfer and move back, residual developer material is removed by a cleaning roller 8, and the magnetic latent image is erased by a demagnetizer 9, thereby completing the series of printing steps. The above is a series of steps, but if a plurality of identical recordings are to be produced, the function of the demagnetizer can be eliminated to prevent the magnetic latent image on the magnetic belt from being erased, and the steps from development to cleaning can be repeated. The magnetic printing device produced in this way is
The recording speed can be selected from 1 ppm to several tens of ppm, and the device cost is less than half that of conventional devices.

[Effects of the invention] As described above, the invention enables recording easily even with a low-output magnetic head by heating the magnetic belt during formation of a magnetic latent image, and this makes it possible to fabricate a multi-channel magnetic head. Since it is simple, it has the effect of providing a high-speed recording and low-cost magnetic printing device.

Another advantage is that since a magnetic belt is used, there is no need to arrange each process in the radial direction of the magnetic drum as in conventional magnetic printing devices, and the degree of freedom in shape is greater, making it possible to make the device thinner. There is also.

Furthermore, another effect is that the number of magnetic heads can be easily increased, so that the number of drive circuits for driving the magnetic heads can be reduced.

In the examples, only cobalt nickel phosphorus is described as the material of the recording medium of the magnetic belt, but it is not limited to this, and cobalt nickel (Co) may be used as the material.
-Ni), chromium oxide (Cr02), permalloy, iron oxide (Fe304), etc. alone or blended with a heat-resistant resin, any material that has temperature characteristics may be used. Further, although details regarding the recording method are not described, either vertical or horizontal recording methods may be used, and it goes without saying that the structure of the magnetic belt can also be varied depending on the recording method.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of the main parts of a magnetic printing device showing one embodiment of the present invention. FIG. 2 is an enlarged sectional view of the heating section of this embodiment. Figure 3 shows the magnetic temperature characteristics of cobalt nickel phosphorus. FIG. 4 is a perspective view of the planar multichannel magnetic head used in this example. 1...Heating mechanism 2...Magnetic head 3...Magnetic belt 4...Developer 5... ...Paper feed roller 6...Transfer roller 7...Fixing roller 8...Cleaning roller 9...
・・Demagnetizer 10 ・ ・ ・ ・ ・ ・ ・ ・
Self-contained paper 201...Protective film 202...Recording medium 203...Nonmagnetic layer 204...Support 205 ......Protective film 206...Heating element 207...Substrate 401...Magnetic head holder 402...
...Applicant for magnetic heads and above Seiko Epson Co., Ltd. Representative Patent Attorney Kizobe Suzuki (and 1 other person) Figure 1 Figure 20

Claims (1)

[Claims] Sequentially in the direction of movement of a magnetic belt that moves at a constant speed,
A magnetic printing device including a recording section, a developing section, a transfer section, a cleaner section, and a demagnetizing section, characterized in that a heating mechanism for warming a magnetic belt is provided near the recording section. Magnetic printing device.