JPS62258485A - Electric thermomagnetic recording device - Google Patents

Abstract

PURPOSE:To easily attract a color material to a magnetic laminate body at the time of development and to make a print pattern sharp by arranging the magnetic material layer of the magnetic laminate body on one side of an electric resistance body layer and providing an electric feed heating electrode opposite the electric resistance body layer. CONSTITUTION:An electric feed head 31 driven according to a desired print pattern supplies a current to a magnetic belt 21 and this current flows straight in an electric resistance body layer 51 and also flows to a return electrode 53 and an electrode brush 59 to heat the layer 51. At this time, a specific part of the magnetic body layer 55 nearby the heat generation part is heated and changes magnetically into a paramagnetic state. In this state, the magnetism direction is inverted by the magnetic field of a magnet 37 for inversion and a magnetic latent image is formed. Then, magnetic toner 35 is attracted to leak magnetic flux from the side of the belt 21 on the side of the magnetic body layer 57 to perform development by a developing device 37, and then toner 35 is transferred to normal paper 39 by a corona discharger 41.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrically conductive thermomagnetic recording device that forms a magnetic latent image on a magnetic layer by heating an electrically resistive layer with electricity.

[Prior Art] Conventionally, there has been an electric thermomagnetic recording device as one of the magnetic recording devices that create a magnetic latent image on the surface of a magnetic material, attract magnetic toner, and transfer the image onto plain paper.

An example of this type of current-carrying type thermomagnetic recording device is shown in FIG. As shown in the figure, the magnetic drum 1 is formed by laminating a magnetic layer 5, an electric resistance layer 7, and a protective layer 9 in this order on the surface of a drum base material 3.
A magnetic latent image is formed by the reversing magnet 13 and the reversing magnet 13. That is, the current flowing from the current-carrying head 11 flows straight from the protective layer 9 to the drum base material 3 via the electrical resistor layer 7 and the magnetic layer 5, causing the current passing portion of the electrical resistor layer 7 to generate heat. At this time, the magnetic layer 5 adjacent to the heat-generating portion of the electric resistor layer 7 is heated to a Curie point or more, and undergoes a magnetic transition to a paramagnetic state. When subjected to the magnetic field of the reversing magnet 13 in this state, the magnetization direction is reversed, magnetic flux leaks, and a magnetic latent image is formed.

Next, the magnetic toner 17 is magnetically attracted to the leaked magnetic flux by the developing device 15, and an image is formed.

[Problems to be Solved by the Invention] However, in the above conventional example, since the electrical resistor layer 7 and the protective layer 9 are laminated on top of the magnetic layer 5, This results in the leakage magnetic flux being considerably weakened, resulting in the problem that the magnetic toner 17 is difficult to attract to the magnetic drum 1.

The present invention has been made in view of the above problems, and +bt
It is an object of the present invention to provide a current-carrying type thermomagnetic recording device in which a coloring material is easily attracted to a magnetic laminate at the time of i.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration as a means for solving the problems. That is, the present invention uses a magnetic laminate composed of at least a magnetic titanium layer and an electric resistor layer, heats the electric resistor layer with an electric current through a heating electrode, and heats the above-mentioned 1/1 body. An electric thermomagnetic recording device that forms a magnetic latent image on the magnetic layer by applying a magnetic field to the layer, magnetically attracts a coloring material to the magnetic laminate, and transfers the coloring material to paper. , wherein the magnetic layer is arranged on the side of the electrical resistor layer on which the coloring material is adsorbed, and the electrically conductive heating electrode is provided opposite to the electrical resistor layer. The main topic is thermomagnetic recording devices.

[Function] The magnetic layer constituting the magnetic laminate is placed on the side to which the colorant is attracted to the electrical resistor layer also constituting the magnetic laminate. In this case, leakage magnetic flux from the magnetic layer is not prevented by the electric resistor layer.

Further, an energized heating electrode is provided opposite to the electrical resistor layer.

In this case, the electric current flowing from the energized heating electrode is not diffused by the magnetic layer, and the electric resistor layer can be heated locally.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram illustrating a current-carrying type thermomagnetic recording device according to an embodiment of the present invention, FIG. 2 is a partially enlarged view similarly illustrating its latent image structure, and FIG. FIG.

In this embodiment, a magnetic belt is used as the magnetic laminate. As shown in FIG. 1, the magnetic belt 21 is wound around three drive drums 23, 25, and 27, and is driven and rotated. In the vicinity of the magnetic bells 1 to 21, an energizing head 31 and a reversing magnet 33 that form a magnetic latent image, a developing device 37 that magnetically attracts magnetic toner 35, and a corona discharge device that transfers onto plain paper 39 are provided. 41, demagnetizing head 13 for demagnetizing the magnetic belt 21, -■ brush-shaped magnetic belt 2;
A cleaner 45 for cleaning the toner 1, and a fixing device 47 for fixing after transferring to the plain paper 39 are provided, respectively.

As shown in FIG. 2, the magnetic belt 21 includes an electrical resistor layer 51 made of polyimide mixed with carbon, a return electrode layer 53 made of aluminum, a magnetic layer 55 made of chromium dioxide, and carbon with high lubricity. The protective layer 57 is laminated in this order, and the electrical resistor layer 51 side is placed in contact with the drive drum 23, 25, 27. As shown in FIG. 3, a return electrode layer 53 is exposed on both sides of the magnetic belt 21, and two electrode brushes 59 are arranged so as to be in contact with the return electrode layer 53.

As shown in FIG. 2, the above-mentioned energizing head 31 is placed in contact with the electrical resistor layer 51 side of the magnetic belt 21, and the reversing magnet 33 is placed on the protective layer 57 side of the magnetic belt 21. ing.

Next, the printing process will be explained in detail based on FIG.

First, the switch 61 is closed, and current is applied to the magnetic belt 21 from the current-carrying head 31, which is driven according to a desired print pattern. The current flowing from the current-carrying head 31 travels straight through the electrical resistor layer 51 and passes through the return electrode 53. The current flows through the electrode brush 59 and causes the current passing portion of the electrical resistor layer 51 to generate heat. At this time, a predetermined part of the magnetic layer 55 near the heat generating part of the electric resistor layer 51 is heated to a temperature of one Curie or more,
Magnetic transfer to paramagnetic state. In this state, the reversing magnet 33
When subjected to a magnetic field of , the magnetization direction is reversed, magnetic flux leaks, and a magnetic latent image is formed. Next, the developing device 37 attracts the magnetic materials 1 to 35 to the magnetic flux leaking from the magnetic layer 57 side of the magnetic bell 1 21 to perform development. Thereafter, the magnetisms 1 to 35 are transferred onto the plain paper 39 by the ronana discharger 11. Thereafter, the magnetic bell 1 is further demagnetized by the demagnetizing head 43, and the cleaner 45
The surface of the magnetic bell i~21 is rubbed by this, and the magnetic i~lunar-5 remaining after the transfer is removed. On the other hand, the transferred magnetisms 1 to 35 of the plain paper 39 are heated and pressurized by the fixing device 47 and fixed.

The configuration of the current-carrying type thermomagnetic recording device according to an embodiment of the present invention has been described in detail above, but in this embodiment, the magnetic layer 55 is arranged on the developing unit 37 side with respect to the electric resistor layer 51. At the same time, the current-carrying head 31 is in contact with the electrical resistor layer 51 .

For this reason, leakage magnetic flux from the magnetic layer 55 is not prevented by the electric resistor layer 51, and as a result, the magnets 1 to 35 can be easily attracted to the magnetic belt 21 during development. As in the conventional case, the electric current flowing from the conductor pad 31 is not diffused by the magnetic layer 55, and the electric resistor layer 51 can be locally heated. Therefore, the printed pattern can be clearly reproduced.

In this embodiment, the protective layer 57 made of carbon prevents the magnetic layer 55 from being worn out. However, the magnetic layer 55 may be made of a hard material such as a mixture of cobal and nickel. It may be plated. Also,
In this embodiment, the return electrode is brought into contact with the electrode brush 59, but an electrode roller or the like may be used. Also,
The return electrode layer 53 exposed from the magnetic belt 21 does not necessarily have to be exposed on both sides, but may be exposed on one side and grounded via one electrode brush 59.

Furthermore, in this embodiment, the current from the current-carrying head 31 is received via the return electrode layer 53, but for example, the magnetic layer 55 or the protective layer 57 is made of a conductor with low resistance, 53 may be eliminated and the magnetic layer 55 or protective layer 57 may be grounded. Also, m? for reversal in this embodiment? Instead of the Ti 33, an electromagnet may be used to adjust the magnetic force.

In addition, in this example, the magnetic laminate is used as a magnetic bell i~
21, but it may be in the shape of a drum, for example.

[Effects of the Invention] As described in detail above, in the current-carrying type thermomagnetic recording device of the present invention, the magnetic layer of the magnetic laminate is placed on the side where the coloring material is attracted to the electric resistance layer of the magnetic laminate. At the same time, an energized heating electrode is provided opposite to the electrical resistor layer. For this reason, the coloring material can be easily adsorbed to the magnetic laminate during development, and the electric resistor layer can be locally heated as in the conventional method. Therefore, the printed pattern can be clearly reproduced.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram illustrating an embodiment of the present invention, FIG. 2 is a partially enlarged diagram illustrating the latent image structure, and FIG.
The figure is a schematic plan view of FIG. 1 viewed from above, and FIG. 4 is a configuration diagram illustrating a conventional example.

Claims (1)

[Claims] Using a magnetic laminate composed of at least a magnetic layer and an electric resistance layer, the electric resistance layer is electrically heated by a current heating electrode, and a magnetic field is applied to the magnetic layer. In an electrically conductive thermomagnetic recording device that forms a magnetic latent image on the magnetic layer, magnetically adsorbs a coloring material to the magnetic laminate, and transfers the coloring material to paper, the magnetic layer is 1. A current-carrying type thermomagnetic recording device, characterized in that the current-carrying heating electrode is disposed on a side of the electric resistor layer on which a coloring material is adsorbed, and the current-carrying heating electrode is provided opposite to the electric resistor layer.