JPS60501923A - Hydrodynamic magnetic recording method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Hydrodynamic magnetic recording method and apparatus Kakusei Engineers Branch The present invention generally relates to magnetically transferring an image onto a recording medium such as a cylinder or a disk. In particular, the coupling between the magnetic recording head and the surface of the recording medium has been improved. It is related to the technology to do so.

溌1su1u The information recording mechanism of a magnetic image recording device can take various forms. Uses an exposure section to selectively erase (demagnetize) the recording medium (e.g. chromium oxide). or an invisible image of the information to be recorded directly onto the recording medium. Some types employ magnetic writing heads that write magnetically. (These various Regarding the description of the general form of the recording system of See Patent No. 4,216,282. ) to these forms and magnetic image recording devices In general, the fidelity of accurately controlling the magnetic storage state of magnetic recording media is not satisfactory. is the main factor determining performance. Such fidelity consists of magnetic recording heads While this is clearly a priority condition for devices with a recording mechanism, It also applies to other forms of equipment that employ requires complete pre-magnetization of the entire recording surface, and to date no one has achieved this task. This is because the main means for achieving this is the magnetic head.

The manufacturing tolerances of the recording head are precisely controlled, but are usually made of chromium dioxide. The surface of the recording medium is measured so that the magnetic head maintains effective and smooth contact. Even if a good contact as described above can be obtained at any position on the recording surface, the desired 2 It doesn't necessarily have a perfect geometric surface. More specifically, recording media (e.g. The surface of the CrO□O layer formed on the surface of the rotating cylinder is due to the unevenness within the recording material itself. Even if a cleaning device such as a vacuum knife is installed, it will not be completely cleaned. usually contains contaminants from foreign objects such as dust and toner particles that cannot be removed. be.

The quality of the image formed by the magnetic recording head on the surface of the recording cylinder depends on the recording head and the Because it depends on the degree of bonding between the cylinder surfaces, the The defect depends on the rotational speed of the cylinder, the quality of the image, and when the cylinder passes the head. This can also cause deterioration of both the cylinder and/or the physical surface of the recording head. It is. Defects on the cylindrical surface not only cause the head to bounce; The contact between the head and the cylinder (and thus maximum magnetic coupling) Both the head and cylinder are subject to wear as pressure is applied to maintain the This can result in blockage (deposition of magnetic media on the magnetic head). become.

When the rotational speed of the recording cylinder is low, the head will damage the top of the chromium dioxide. This allows the recording surface to slide without losing contact, and defects are a serious problem. isn't it. Also very fast using fine media on the surface of the magnetic disc or cylinder is created by the relative high rotational speed between the recording surface and the head. The aerodynamic hair ring, coupled with a high quality medium, allows the above-mentioned problems can be reduced. However, intermediate speeds (130 cm/s ~380an (50-150 inches)), ignore defects on the cylindrical surface. In fact, the mapping process suffers from the above-mentioned obstacles.

X Saraki mutual! According to the present invention, the surface of a magnetic recording medium such as a cylinder coated with chromium dioxide is Avoiding the wear and bouncing problems discussed above, such as those caused by defects. , which requires an effective and familiar contact between the recording head and the magnetic image recording surface. Uses hydraulic magnetic imaging technology to measure touch. According to the system of the present invention, liquid Apply a liquid (e.g. water) to the surface of the cylinder slightly ahead of the recording head position, and A hair ring layer is formed and the recording head is pressed against the head. Except for the extremely thin liquid film between the cylinders, the surface of the cylinder is smooth and magnetic. combine.

As a result of this extremely thin liquid hair ring formation, continuous pressure is applied to the head. The head can be brought into effective and familiar contact with the surface of the recording medium and the medium can be pulled. There is no risk of scratching or causing wear to the head. Thus, the head and the circle The slip characteristics obtained between the tubes at low speeds are related to high relative tangential speeds. can be achieved without associated problems. In addition, the movement of the liquid passing through the head itself is also This creates a suction effect as shown in Fig. 2, which acts to push the head toward the recording surface. this The action is further aided by the hydrostatic action of the liquid. Moreover, liquid hair ring In this case, the foreign matter that accumulates between the head and the recording surface exists in the form of a solution and is This will help clean the head and cylinder.

The bearing is preferably formed on a cylinder on the leading side near the recording head. It is best to use a sponge/wipe type water applicator. Pour water into the sponge from the liquid supply pipe. feed and let it drip from the sponge.

This water dripping is converted into a thin film by a wiping blade placed opposite the cylinder. coating The supply tube moves the recording head relative to the recording surface for the purpose of controlling the flow of water into the dishwasher. It is positioned so that it can be selectively pinched and released by a mechanism that good. When the head is retracted from the surface (after mapping), the fluid (water) line is blocked. The water supply to the applicator is interrupted and no liquid film/bearing layer is formed.

Conversely, when the head is pushed toward the recording surface, the head moves toward the recording surface and bears against the recording surface. The ring is applied and the head comes into contact with the bearing at that location.

Houou■Saramimu leaves the alliance FIG. 1 is a schematic side view of a magnetic image recording device employing the hydraulic mapping device of the present invention. the law of nature, FIG. 2 is an enlarged detailed view of the liquid hair ring applicator schematically illustrated in FIG. 1; Figure 3 exaggerates the coupling between the magnetic recording head and the liquid hair ring on the surface of the recording medium. FIG.

Souya Sakai In FIG. 1, a schematic side view of a magnetic image recording device employing the hydraulic mapping device of the present invention is shown. It shows a top view. Such devices are used for mapping (recording) and reproduction (hard copy creation). It can contain a single part for dual use, which is suitable for electrical and magnetic re-imaging (Edward It is similar to the conventional type adopted by Mr. It may also be adopted at the same time as the submission of the invention assigned to the assignee. below In the description and illustration in Figure 1, the mapping section and the printing section are separate from each other, and they are The air image cylinder is coupled between the two parts and operates in separate functions, as described in the above-mentioned application. Let's assume it is as described. Under such circumstances The schematic diagram of the form of the recording section may be simple, and the printing section (decorator, web transport The details of the mechanism, etc.) are unnecessary for understanding the present invention, and therefore are not described here. is not shown or described.

In FIG. 1, the recording cylinder lO is driven by an appropriate drive mechanism (not shown). The shaft 11 is shown rotatable about the axis 8 in the clockwise direction R. Surface of cylinder 10 is a standard method in the field of magnetically sensitive recording, such as a layer of chromium dioxide. Made from recording materials. A recording head 14 and a cleaning area are placed on the circumference around the cylinder 10. (including brushes, vacuum knives, magnetic adsorption elements, etc.) do not themselves constitute the invention. , a detailed explanation will be avoided here. Those are only well known to those skilled in the art. , a section is provided to explain some of the components of the magnetic image recording environment to which the present invention is applied. Illustrated.

It is possible to move to As briefly mentioned above, in terms of recording, The recording head 14 is brought into effective contact with the surface 12 of the cylinder lO by a positioning mechanism. The information signal coupled to the head 14 is pressed into contact with the acid. surface 1 in the form of changes in the magnetic range that correspond to these information signals within the layer of chromium chloride. Recorded on 2.

In the vicinity of the magnetic recording head 14 and upstream (with respect to the rotational direction R of the cylinder lO), there is a liquid A ring applicator 16 (details shown in Figure 2 below) is provided, and the head A liquid hair ring is formed between the head 14 and the surface 12 to connect the transducer surface of the head 14 and the surface. The degree of bonding between surface 12 and 6 in total Much improved compared to the original. The applicator 16 is connected to the liquid supply a13 and the liquid supply pipe 21. The bearing fluid (water) is supplied from the pipe 21 by gravity flow. It will be done. As will be described later based on FIG. 2, the water supply pipe 21 is connected to the head positioning mechanism 1. 7 and directs the flow of water therethrough of the head 14 with respect to the surface 12. It can be selectively controlled in response to movement. To explain Figure 1, water is supplied from a water tank source 13 through a tube 21 to an applicator 16 to form a thin film or liquid. A layer of (water) is formed on the surface 12 of the cylinder 10 and is carried over the cylinder 10 to record the magnetic recording. It passes through the position of the head 14. The head 14 is pressed against the surface 12 of the cylinder lO The head encounters this liquid film, which the cylinder rotates around. The hair ring that the head 14 lifts up when it rotates in the turning direction R and passes through the I will be working.

Referring now to Figure 2, details of the liquid hairline applicator are shown and the sprayer is shown in detail. The wiper includes a sponge 31 and a wiping rubber piece 32 supported by the sponge 31. The water released from the pump is directed towards the surface 12 of the cylinder 10 and the recording head I4 An ant ring 51 is formed in the thin liquid that passes through the position and is scattered. water is the first Water is supplied to the applicator 16 from a water supply source (not shown) corresponding to the water source 13 in FIG. The water is Flowing through the pipe 21 due to gravity, the sponge 31 is transported along the saturation 10. It rests on the hair ring 51 of water.

Downstream of the applicator 16 is a magnetic recording head 14 . The head 14 is a flat spring or or attached to one end of the band 33, with the other end supported by a firmly fixed support block. It is held by a lock 38. Hand 33 is made of helium strips. , the head 14 is cantilever-supported by the block 38, and the head 14 is also cantilever-supported by the block 38. has been done. Movement of head 14 toward and away from surface 12 causes the head to move toward and away from surface 12. 14, and is driven by the drive motor 44 in the direction of the arrow 45 (with respect to the axis of the cylinder 10). ) by means of a radially movable positioning rod 42. Positioning rod 4 2 is engaged with a scissors bar (pinch bar) 41, and when the bar 42 moves, the pinch bar responds. It is supposed to move.

passes through the space or groove between the support head 47 and the pinch rod 41 and is shown in FIG. In this position, tube 21 is uncompressed and water flows through tube 21 to applicator 16. be able to. The drive source 44 is operated to pull the recording head 14 from the cylinder 10. Then, the pinch bar 41 moves toward the support heir 47, thereby causing the tube 21 to It is compressed or pinched between the pinch rod 41 and the support sheath 47, where it is applied. The flow of water to vessel 16 is interrupted. Such movement of the head 14 causes the cylinder 10 to This is done at the end of the recording mode of the operation, and its purpose is printing in the printing section (not shown). Instead of being used as a cylinder. The water supply channel pipe 21 and the moving mechanism 17 for the head are By mechanically bonding as shown in the second leap, the formation of a liquid hair ring is achieved. A simple design is provided for synchronizing the engagement of the head and the cylinder 10. head 14 from its retracted position to a position in effective contact with the mapping cylinder 10. When the rod 42 is to be moved, the movement of the rod 42 causes the pinch rod 41 to The head 14 then reaches the surface 12 of the cylinder 10, at which time the book In the invention, before the head 14 contacts the cylinder 10, there is a gap between the head 14 and the surface 12. A hydraulic hair ring begins to form.

According to the thickness of the water hair ring 51 defined by the applicator 16, the water is applied to the head 14. This pressure creates the desired magnetic field between the transducer surface of the head 14 and the surface 12 of the cylinder 10. determined to maintain gaseous bonding (i.e., physical spacing). This pressure is driven 30-60 grams (1-2 oz.) given in #44 and Helium Band 33 ), and a slight pressure is applied to the head in the direction perpendicular to the surface 12. Only. This slight pressure places the head 14 on the water layer 51 of the hair ring. However, it is insufficient to overcome the back pressure of the support layer 51 and the head 14 is This prevents the surface from coming into contact with the surface 12 at any time.

FIG. 3 shows an exaggerated view of the head 14 resting on the liquid hair ring 51. This is a drawing that is not to scale. As mentioned before, the thickness of the liquid film hair ring 51 is controlled by the flow rate of water from the applicator 16 and its positioning with respect to the surface 12 of the tube 10. can be controlled. Of course, the exact thickness of the bearing 51 is determined by the applicator 16 and the head. It depends on the speed of rotation of the cylinder 10 passing through the door 14 and the quality of the surface 12. these The elements can be easily determined empirically based on the size and form of the recording device. and does not need to be determined precisely prior to assembly of the entire system. As mentioned above, simply The water flow rate based solely on gravity makes the hair ring suitable for the purpose of carrying out the present invention. It is allowed to give.

The action of the bearing 51 shown in FIG. The surface 12, such as a protrusion 61 or a seam 62, is provided with a small distance between the surface 12 and the surface 12. defects such as toner and dust particles 52 in the solution from the head 14 and the head 12. It can keep foreign objects away. This latter effect is due to the accumulation of foreign matter on the surface mentioned above. and, as mentioned above, to ensure that it is not detrimental to the intended performance of the recording device. stomach. Some foreign objects carried by the hair ring 51 floated on the water surface and after a long time It is not surprising that a "bathtub scale" line 54 forms on the side of the head 14. do not have. However, this line does not affect head performance and does not cause head wear. head 14, and when the head itself is removed for cleaning. Can be easily removed.

As can be understood from the above, the performance of magnetic image recording devices and the lifespan of their parts are Significant improvements can be achieved according to the hydraulic recording scheme of the present invention. cylinder The configuration for applying a liquid hair ring to the surface of It does not affect the magnetic coupling force with the surface of the film. Recording performance benefits afforded by the present invention This point is important when considering the potential of magnetic image recording devices compared to electrical recording devices. This is particularly noticeable. In electrical devices, the invisible image on the recording surface is reused. Each time you want to read or play something, you have to print it out and make it into a document. but In magnetic imaging devices, once an image is recorded, it is permanent and remains until it is erased. It is effective. Therefore, the productivity of magnetic imaging devices is potentially greater than that of electrical recording devices. Ru. However, prior to the present invention, the performance of magnetic imaging devices and the quality of recorded images associated with them were is limited by the wear and bounce problems of the F, as mentioned above. These problems were solved by the hydraulic mapping of the present invention. to get the desired solution An effective and compatible magnetic coupling between the required head and image recording surface is achieved according to the present invention. Magnetic image recording applying the tree method is achieved using hydraulic mapping techniques. The device is a conventional electrical and magnetic recording device IO It is inferior in terms of cost and productivity.

Although one embodiment in accordance with the invention has been illustrated and described, the invention is limited thereto. . Various changes and modifications are possible that are well known to those skilled in the art; We therefore do not wish to be limited to the details illustrated and described in this document, but rather use conventional techniques in the art. It is intended to cover all changes and modifications obvious to those of ordinary skill in the art.

Engraving (no changes to the content) 3 /%’, 2 Procedural amendment (voluntary) June 5, 1985 Manabu Shiga, Commissioner of the Patent Office 1.Display of the incident Relationship to the incident: Patent applicant 4.Representative person〒io.

6. Number of inventions increased by amendment 07. Subject of amendment

Claims (1)

[Claims] 1. Predetermined characteristics of the recording medium cause a transducer coupled to the medium to be coupled to the recording medium. A method for controlling fa) a liquid between the surface of the recording medium and the transducer; A recording method comprising the step of forming a hair ring. 2. A method according to claim 1, wherein the above step (al is the above recording medium) A recording method that involves forming a thin film of water on the surface of the body. 3. A method according to claim 1, wherein the recording device has a recording medium and a recording medium. A recording method comprising a magnetic image recording device in which the image recording device and the transducer move relative to each other. Law. 4. A method according to claim 1, wherein the recording medium is a magnetically sensitive recording material. A recording method in which the transducer comprises a magnetic head. 5. A method according to claim 3, wherein the recording medium has a magnetic field sensitive material on its surface. a rotating cylinder having a region of material, the step positioning the transducer with respect to the cylinder; A recording method in which a thin liquid film is formed on the surface of the cylinder in the vicinity of the cylinder. 16. A method according to claim 3, wherein the transducer is preset in the recording medium. said step is movable with respect to the position at which the determined magnetic properties are determined; Apply a hair ring of the liquid to the surface of the recording medium before positioning the transducer in the position. A recording method that involves forming a . 7. A method according to claim 6, comprising moving said transducer with respect to said position. and thereby controlling the formation of said liquid hair ring. 8. A method according to claim 7, wherein the bearing is made of a thin film of water. recording method. 9. A device in which predetermined characteristics of a recording medium are determined by a transducer coupled to the medium. a set for controlling the coupling of said transducer to said recording medium for use in said recording medium; a means for applying a liquid to the recording medium; a portion of said recording medium to which said transducer is coupled to determine said predetermined characteristic; The surface of said transducer and said recording medium is such that at least a film of liquid is formed for at least a minute. and means for providing an effective command between the recording device and the recording device. 10. A combination according to claim 9, wherein the means for applying the liquid comprises: A recording device comprising means for applying a thin film of water to the surface of the recording medium. 11. A combination according to claim 9, wherein the device stores the recording medium. means for moving the film of liquid relative to the transducer, the film of liquid being connected to the recording medium and the transducer; A recording device adapted to be conveyed past the transducer during relative movement of the transducer. 12. A combination according to claim 11, wherein the means for applying the liquid is , means for directing water onto the recording medium; and means formed on the recording medium. and means for determining the thickness of the water film. 13. A combination according to claim 9, wherein the recording medium is a magnetically sensitive recording medium. A recording device comprising: a recording material, said transducer being magnetic; 14. A combination according to claim 13, wherein the E recording medium has a magnetic surface on its surface. the means for applying said liquid comprising a rotatable cylindrical body having a region of field-sensitive material; The transducer 13 related to the cylindrical body a recording device comprising means for forming a film of clear liquid on the surface of said cylindrical body in the vicinity of the position of . 1.5. A combination according to claim 9, wherein the recording device is a magnetic image recording device. A recording device consisting of a recording device. 16. A combination according to claim 15, wherein the transducer is a magnetic head. and the magnetic head operates to determine predetermined magnetic properties. A recording device that is movable with respect to its position on the surface of a recording medium. 17. A combination according to claim 16, wherein the means for applying the liquid is , a hand for controlling application of the liquid to the recording medium according to movement of the magnetic head; A recording device containing a stage. 18. A combination according to claim 17, comprising means for applying the liquid. A recording device comprising means for applying water to the recording medium.゛ 19. Magnetic field-sensitive characteristics determined by a magnetic field-generating transducer to which magnetic storage properties are coupled Coupling the transducer to the medium for use in a magnetic image recording device having a recording medium. A combination for controlling the combination, means for applying a liquid to said recording medium; A film of liquid is created in the area of the recording medium to connect the transducer and the recording medium. It consists of a means for providing an effective cushioning material between the material and the surface. Recording device. 20. A combination according to claim 19, wherein the means for applying the liquid is , a recording device comprising means for applying a thin film of water to the surface of the recording medium. 21. A combination according to claim 19, comprising the above device 5. includes means for moving said recording medium with respect to said transducer, wherein said film of liquid is During the relative movement of the recording medium and the transducer, it is carried past the L transducer. recording device. 22. A combination according to claim 21, comprising: means for applying the liquid; means by which water is directed towards the recording medium; - F formed on the recording medium; and means for determining the thickness of the water film. 23. A combination according to claim 21, wherein the -F recording medium has a the means for applying said liquid comprises a rotatable cylindrical body having a region of magnetically sensitive material; , a thin liquid is applied to the surface of the cylindrical body near the position of the transducer described in 1. with respect to the cylindrical body. A recording device comprising means for forming a film of. 24. A combination according to claim 21, wherein the transducer is configured to and the magnetic head operates to determine predetermined magnetic properties. A recording device that is movable with respect to its position on the surface of a recording medium. 2. A combination according to claim 24, comprising means for applying the liquid. controls the application of the liquid to the recording medium according to the movement of the magnetic head. A recording device containing means. 26. Magnetic field-sensitive memo determined by a magnetic field-generating transducer to which magnetic storage properties are coupled The above-mentioned converter and the above-mentioned recording medium for use in a magnetic image recording device having a recording medium. The combination body for providing effective and familiar magnetic coupling between This is unrelated to surface defects or contamination due to foreign matter, and is means for applying a liquid and at least in the portion of said recording medium to which said transducer is coupled; The transducer is brought into physical contact with the surface of the recording medium by causing a liquid film to form. When pressed in a tactile direction, the liquid film prevents the physical contact. This acts as a cushion (buffer material) for the converter and the recording medium. 2. A recording device comprising means for providing effective and compatible magnetic coupling. 27. A combination according to claim 26, wherein the means for applying the liquid is , a recording device comprising means for applying a thin film of water to the surface of the recording medium. 28. A combination according to claim 26, wherein the device comprises: means for moving a film of liquid relative to said transducer, said film of liquid being on said recording medium and said transducer; a recording device adapted to be conveyed past said transducer during relative movement of said transducer; . 29. A combination according to claim 26, wherein the means for applying the liquid is , means for directing water towards said recording medium; and means formed on said recording medium. and means for determining the thickness of the water film. 30. A combination according to claim 26, wherein the recording medium has a magnetic surface on its surface. the means for applying said liquid comprising a rotatable cylindrical body having a region of field-sensitive material; a thin film of liquid on the surface of the cylinder near the location of the transducer with respect to the inner cylinder; A recording device including means for forming.