SU556406A1 - Flat storage media for thermomagnetic recording apparatus - Google Patents

Description

one

The invention relates to the field of magnetography and can be used in magnetographic duplicating machines operating on the principle of thermomagnetic recording as a flat magnetic carrier.

A known flat magnetic core containing a ferromagnetic layer (the actual magnetic carrier) and a magnetizing element 1.

In the known flat magnetic carrier, the magnetizing element is made in the form of a rectangular plate (core) of magnetic material, on the side faces of which there is a current winding connected to an alternating current source to create high-frequency magnetization. A switching element is inserted into the winding circuit, which includes the winding for a specified period of time. Due to the fact that the top face of the rectangular plastip has overall dimensions equal to the magnetic form, and the winding covers the side faces, the iodomagnetic field is uneven (if the length of the magnetic system is less than its diameter, spontaneous demagnetization is observed with a large non-uniformity of the magnetic field in the transverse section plane) and The print has an uneven contrast. The aim of the invention is to improve the print quality, achieved by a more uniform magnetization of the entire working surface of the magnetic carrier. This goal is achieved in that the magnetizing layer is a series of tightly packed insulated conductors connected in series with each other. When a direct current passes through a conductor,

linear alternating magnetic fields magnetizing the ferromagnetic layer and visible after the appearance of ferropowder in the form of parallel lines. The distance between two adjacent lines corresponds to the diameter of the conductor and determines the resolution.

FIG. 1 shows a flat magnetic carrier, in section, with a system of conductors with a zolation coating; in fig. 2 - distribution

the intensity of the magnetic fields between the current-carrying conductors of the magnetizing element; in fig. 3 is an image forming mechanism. The magnet carrier is composed of a ferromagnetic layer 1, a magnetizing element 2, which contains tightly arranged in one row, connected in series with conductors 3 and 4 with a dielectric layer 5 between them. The magnetizing element 2 is laid

on dielectric podlchku 6. System Po3

therefore, the connected conductors 3 and 4 of the magnetizing element 2 are connected to the pulse generator 7. The pulse generator delivers threshold pulses to the magnetizing element, magnetizing the ferromagnetic layer 1.

When current passes through the conductor 3, a magnetic field is created around it, which is directed clockwise, and when current passes through conductor 4, it is counterclockwise. In this case, any two adjacent zones of the ferromagnetic layer 1, lying between conductors 3 and 4, will have a maximum strength, as shown in FIG. 2

With simultaneous local exposure to thermal radiation 8 in the form of an image, for example, the letter A (see Fig. 3) and a magnetizing field, the irradiated areas are selectively magnetized, ensuring a sufficient difference in the field intensity compared to the fields of non-irradiated areas. This allows the irradiated

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a plot with a frost powder, which is concentrated in the portions corresponding to the image.

Claims (1)

1. A flat magnetic carrier for thermomagnetic recording apparatus containing a substrate, a magnetizing layer connected to a pulse generator, and a ferromagnetic layer located above the biasing layer, characterized in that, in order to improve print quality by more uniformly magnetizing the entire working surface of the magnetic It is a series of tightly packed insulated conductors connected in series with one another. Sources of information taken into account in the examination: 1. US patent No. 2793135, cl. 117-175, 1957 (prototype). / f / S fi S f /  - -f ff 3 / I I I / I // 7 I iii fH V. V V M -H VU2.2 ig. 3