JPS61192016A - Magnetic head cleaning tape - Google Patents

Abstract

PURPOSE:To eliminate mechanically joined parts hence the trouble in the joined parts and to provide a cleaning tape suitable for mass production by coating and forming intermittently coated films of a prescribed length having cleanability at prescribed intervals on a magnetic layer of an ordinary magnetic tape which is uniformly subjected to surface finishing in the longitudinal direction. CONSTITUTION:A polester film is generally used for a base film 5. The magnetic layer 6 as a check tape consists generally of magnetic powder, binder, carbon, alumina as well as various lubricating agents, dispersant, etc. and the surface thereof is finished to a specular surface by a calender treatment. A coating layer 7 for providing a cleaning effect is the coated film which is coated by using a special paint contg. a large amt. of a polishing agent such as, for example, alumina and chromium oxide or a magnetic paint having high polishability and has excellent cleability. Said layer is formed by the coating alone in some case or is subjected to the calender treatment in some case in order to realize suitable surface roughness. The coating layer 7 is formed by a method such as intermittent reverse coating or offset coating and there is no need for increasing the film thickness as large as the film thickness of the magnetic layer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied in the field of magnetic recording, particularly to video heads, audio heads, control heads, etc. that are the heart of recording and reproducing machines using magnetic tape such as video tape recorders. 9. Dirt on the surface.

The present invention relates to a magnetic head cleaning tape having a so-called cleaning/checking function, which eliminates scratches and surface roughness, and allows the image quality and sound quality to be confirmed simultaneously on the same tape.

2. Description of the Related Art A conventional magnetic head cleaning tape has the structure shown in FIG. 2, as shown in, for example, Japanese Utility Model Application Publication No. 49-108003.

In other words, the cleaning tape 1 and the check tape 2 are pasted together with a joining tape 3.

This is two types of tape made through separate processes that are joined together to be used as one tape.

Problems to be Solved by the Invention In such a conventional configuration, the cleaning tape 1,
Since the check tape 2 is mechanically joined with the joining tape 3, the joining accuracy (gap, width accuracy, etc.) of both tapes 1.2 is important. For example, if the clearance is too large, the joining tape 3 The disadvantage is that the adhesive adheres to the head and running system, and if there is overlap, it can damage the head and running system. On the other hand, there is also a drawback that the bonding tape 3 on the back side is easily damaged by repeated running.

Furthermore, the manufacturing process and the joining and winding operations are complicated, making it difficult to mass-produce.

The present invention is intended to solve these problems, that is, to eliminate mechanical joints, eliminate defects at such joints, and to make the product suitable for mass production. be.

Means for Solving the Problem In order to solve this problem, the present invention provides a magnetic layer on a conventional magnetic tape having a uniform surface finish along its length.
A coating film having cleaning properties of a predetermined length is intermittently applied at predetermined intervals.

Function: This configuration has predetermined video and audio signals recorded on a normal magnetic tape portion, and has a so-called check function during playback. On the other hand, the intermittently applied coating has a so-called cleaning function that removes dirt and scratches from the head and running system by designing a binder system with a high cleaning effect and a rough surface. Therefore, there is no joint between the part with the checking function and the part with the cleaning function, and the conventional problems are solved.

Embodiment FIG. 1 is a block diagram of a magnetic head cleaning tape according to an embodiment of the present invention.

In Figure 1, 5 is a base film, and 06 is a magnetic layer as a check tape, which is generally made of magnetic powder, binder, carbon, alumina, various lubricants, 1 dispersant, etc. The surface has been calendered to a mirror finish. 7 is a coating layer that performs a cleaning action;
For example, it is a coating film with excellent cleaning properties that is applied using a special paint containing a large amount of abrasive such as alumina or fermented chromium, or a highly abrasive magnetic paint. In order to achieve the appropriate surface roughness, sometimes only coating is used, and sometimes a gentle calendering process is performed. The coating layer 7 can be formed by intermittent reverse coating or offset coating, and there is no need to increase the thickness of the magnetic layer.

Effects of the Invention As described above, according to the present invention, the layer 17-
Since it has a simple structure in which the Jung coating film is provided intermittently, it can solve the characteristics and manufacturing defects of the conventional bonding method using bonding tape, making it possible to create a practically excellent magnetic head IJ. We can provide Jung tape.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a magnetic head cleaning tape according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional magnetic head cleaning tape. 5...Base film, 6...A pillar layer, 7...Coating layer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] A magnetic layer for recording and reproducing signals is provided on the base film,
A magnetic head cleaning tape characterized in that a coating layer having a cleaning effect is provided on the magnetic layer at arbitrary intervals.