JPS6233334A - Making of elastic recording disc - 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 Field of the Invention The present invention relates to the field of magnetic recording media, and more particularly to an improved method of making a conventional elastic disk for digital data storage, of the type having a reinforcing structure in the area near the central aperture.

DESCRIPTION OF THE PRIOR ART Magnetic data storage media consisting of a circular elastic disk coated with magnetic material and sealed in a hermetically sealed body with an opening for access to the disk have been used extensively in the computer industry. There is. The aforementioned assembly came to be referred to as the "floppy disk assembly J" or simply "floppy disk." The elastomeric recording disk has a central circular aperture that rotates the disk to reproducibly accurately position the disk on a spindle and to allow transfer of data into and out of the coating on the disk. It is used to make. Since the data is stored on the disk in a narrow mountain rack concentric to the central opening,
Any deviation derived from the alignment of the disk relative to the spindle reduces the replayability of the stored data. The area of the disc immediately surrounding the opening is subject to stress and friction both by insertion/mounting of the disc into the spindle and by rotation of the disc. Normal use thus causes wear and/or damage to the disk in the central aperture area, which ultimately results in poor alignment and unstable data transfer in use.

Reinforcement of the peripheral area of the central opening extends the life of the disk, and various attempts have been proposed to achieve such reinforcement. Aperture reinforcement obtained by gluing an annular member of structural material to an elastic disk around a central aperture has been described by Arber et al.
No. 4,052,750, issued in 1999. Fabrication of the floppy disk assembly according to said patent requires precise alignment between the inner edge of the disk opening and the annular reinforcement member. The floppy disk produced by the Barba et al. patent is unsightly because adhesive smears and stains the spindle with adhesive.A liquid polymeric material is supplied to an annular area around a central opening of the disk, and the liquid material is Aperture reinforcement achieved by curing to form an integral reinforcement has been described by Conner et al.
No. 4,387,114, issued in 1995. While discs made in accordance with this patent eliminate the possibility of adhesive smearing, the fabrication process still requires precise alignment of the reinforcing structure with the opening in the disc. The method in that patent requires pumping some liquid from an annular container and reciprocating an elastic rubber tampon to print the liquid in a precise area around the central opening of the disc. Precisely positioning the elastomeric tampons alternately in the container and disc is slow and expensive.

The thickness of the reinforcing structure of the disk influences its clamping force in typical spindle configurations. The thinner the reinforcement, the more
The tightening force decreases in a direction that is smaller than the expected tightening force obtained with an unreinforced disk. Therefore, it is preferable to minimize the thickness of the reinforcing structure so long as sufficient structural reinforcement is provided. In the Conner et al.
5 inches).

This is thinner than that obtained with the structure disclosed by Barba et al., which provides a total disk thickness of 0.41 mm (0.016 inches) when both sides of the disk are reinforced. will increase to. The thinner reinforcement better approximates the spindle's original design criteria and the dimensions of the unreinforced disk.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for fabricating elastic recording disks with reinforced aperture areas faster than methods according to the prior art.

Another object of the invention is to provide a method for making an elastic recording disk with integral aperture reinforcement, which requires less precision in the positioning of the reinforcement structure than methods according to the prior art.

Another object of the present invention is to provide a method of fabricating an elastic recording disk that provides consistent and precise alignment between the inner diameter of an aperture in the disk and the inner diameter of a corresponding aperture in the reinforcement.

Another object of the present invention is to provide a method of fabricating an elastic recording disk with improved smoothness of the inner surface of the central opening.

Another object of the invention is to provide a reinforcing structure around the central opening of the disc such that the overall dimensional increase in thickness of the reinforced disc is no more than 0.025 millimeters (0,001 inch) over an unreinforced disc. An object of the present invention is to provide a method for manufacturing an elastic recording disk having the following features.

Another object of the present invention is to provide a method for fabricating elastic recording disks with reinforced open areas from long webs of magnetic media material at rates of greater than 1000 discs per minute per fabrication facility.

In summary, the fabrication method according to the invention begins by opening a long thin wear of magnetic recording material that includes a central structural layer and magnetized coatings on both sides. The thickness of the garment is 0.0025
mm (0,0001 inch) to 0.013 mm <0.
A thin coating of thermosetting polymeric material between 0.0005 and 0.005 inches is applied by flexographic printing to selected areas on both sides in a specific pattern. The thermosetting polymeric material is then cured into a polymerized reinforcing structure of the web. Elastic disks for use in floppy disk assemblies used for magnetic data storage are then produced from the wear by a stamping operation. This punching operation is carried out by positioning the wear so that the central opening of the disk is approximately centripetal to the circular portion reinforced by the coating of polymeric material.

The printing, curing and die-cutting processes are carried out by continuously moving the web so that discs can be produced at a rate of 2000 pieces per minute. A central opening is drilled into the garment after the reinforcing polymeric material is supplied and cured.
The alignment of the apertures through the reinforcement and the apertures through the magnetic recording material is automatic.

An advantage of the present invention is that it provides a faster method of fabricating elastic recording disks with reinforced apertures than prior art methods.

Another advantage of the present invention is that it provides a method of fabricating an elastic recording disk with integral aperture reinforcement in which the positioning of the reinforcement structure is less demanding than prior art methods.

Another advantage of the present invention is that it provides a method of fabricating an elastic recording disk in which the alignment between the inner diameter of an aperture in the disk and the inner diameter of a corresponding aperture in a reinforcement is consistent and accurate.

Another advantage of the present invention is to provide a method of fabricating an elastic recording disk with improved smoothness on the inner surface of the central aperture.

Another advantage of the present invention is that the overall dimensional increase in the thickness of the reinforced disc is 0.025% over the thickness of the unreinforced disc.
It is an object of the present invention to provide a method for manufacturing an elastic recording disk with a reinforcing structure around a central opening of the disk that does not exceed more than 0.001 inch (mm<0.001 inch).

Another advantage of the present invention is that it provides a method for fabricating elastic recording disks with reinforced open areas from long wears of magnetic material at rates in excess of 1000 disks per minute per fabrication facility.

These and other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description of the preferred embodiments illustrated in the various drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a floppy disk assembly, generally designated 10, constructed in accordance with the prior art. The assembly 10 includes a seal 25 that seals 111 an elastic disk 27 . Disc 27. is circular and has a solid axis 28 perpendicular to the plane of its surface and a circular central opening 29 concentric with said axis 28. The seal 25 is formed by adhering a porous low friction liner 31 to a solid plastic outer layer 33 and molding the disc 27 in a sealed manner. The seal 25 has a circular opening 35 larger than the opening 29 of the disk 27 and generally concentric, and a pair of oval openings 37 located on opposite sides of the seal 25 (although the bottom opening is not shown). . A reinforcing ring 39 is glued to the disc 27 about the axis 28 and forms reinforcement around the central opening 29.

FIG. 2 shows the central portion of the reinforced elastic disc, designated generally at 40. The elastic disk 40 is
The central frontage 4 centripeted around the axis 46 which is the solid axis
4 and a polymeric material coating 48 overlying the magnetic recording material 42 in the area surrounding said opening 44 . The magnetic recording material 42 consists of a central structural layer 50 made of a plastic film, such as polyester, and magnetic coatings 52 on both sides of the structural layer 50. When disk 40 is made according to a preferred embodiment of the method of the present invention, coating 48 of polymeric material has a thickness of 0.0025 mm (0.0001 inch).
and 0.013 mm (0,0005 inches).

The width of the area in which the coating of polymeric material is located is not critical, but is large enough to work with the clamp by providing reinforcement over the entire area of the disk drive clamp, and within the area where data is to be recorded. It must be small enough to prevent it from extending.

The area of the coating 48 covers a circular area with a diameter sufficiently larger than the diameter of the opening 35 in the enclosure 25, and the disk 40 shown in FIG. 2, not shown in FIG. Preferably, a tolerance is provided for the concentricity of the outer diameter of the coating 48 so that only the area bearing the polymeric material coating 48 is visible through the opening 35 of the closure 25.

In a preferred embodiment, coating 4 of disk 40
8 has a diameter of approximately 44.45 mm (1.75 inches).

FIG. 3 shows the sequence of the method according to the invention. A long web 60 of elastomeric magnetic recording material 42 extends through the various stations of the method according to the invention, the steps of which are carried out as the web moves from left to right through the stations shown in FIG.

The web 60 is contained in a roll 62 and has a width of approximately 152.4 mm.
The thickness is 0.076 mm (0,003 mm) with a handle (6 inches).
A long strip of magnetic recording material 42 (inches). From roll 62, web 60 passes through a first printing station, generally designated 70. The first print station 70 is a flexographic printing apparatus that includes a container 72 containing a quantity of uncured liquid polymeric material 74, a material transfer roller 76, a metering roller 78, a pressure Tl 480, and a print cylinder 82. . The web 60 passes between an impression cylinder 80 and a print cylinder 82 such that the first side of the elastic magnetic recording material 42 of the web 60 and the recording material 42 of the web 60
with the second side facing the cylinder 82.

The polymeric material 74 is suitable for use as a coating material;
and to provide a reinforcing structure for the disk 40 when cured. It can be any of a wide range of thermoset-based polymers exhibiting the required mechanical properties. Materials such as polyester, epoxy, polyurethane, and silicone are among the various materials that may be selected for use as polymeric material 74. When selecting the resin/curing agent to be used for the polymeric material 74, good results may be achieved using a solventless UV curing system. The curing device is relatively stable in the uncured state and is suitable for handling and handling of the material 74.
4 in container 72 does not result in variations in viscosity or coating thickness for the finished product. Solvent-based or room-temperature curing equipment can be used, but in this case, close control over shelf life is required.

Significant precautions are required to ensure uniformity of the finished product, including adjusting the time in the container 72 and frequent cleaning of various elements of the first printing station 70.

From the first printing station 70, the web 60 passes through a first curing station, generally indicated at 90. The first curing station 90 includes a set of three mercury lamps 92, each of which has two parts of the light spectrum.
Significant amounts of ultraviolet radiation can be emitted in both areas.

One of the regions is centered around a wavelength of 254 nanometers and the other region is centered around a wavelength of 365 nanometers. Although other wavelengths may be used, experience has shown that for many polymeric materials that can be used as polymeric material 74 and when applied to the desired thickness for coating 48 of polymeric material, 254 radiation in the region around the nanometer wavelength effectively hardens the surface of the coating 48, and radiation in the region around the 365 nanometer wavelength effectively penetrates the surface of the coating;
Curing of the lower thickness of coating 48 is shown. The amount of ultraviolet light provided to web 60 from mercury lamp 92 needs to be related to the speed of web 60 movement. The higher the amount of light supplied, the faster the curing speed, and therefore the faster the web 60 can move. By using three individual mercury lamps 92 and providing two intensity ranges for each lamp 92, a variety of overall light intensities can be obtained. Therefore, the method can be carried out at multiple speeds of movement of the ware 60 and therefore at multiple manufacturing speeds of the disc 40. The ability to easily select the manufacturing speed provides the advantage that the user can optimize the manufacturing speed for various conditions.

Faster production speeds increase the availability of equipment and reduce labor costs per unit to some extent; however, in the case of failures, the amount of scrap generated increases before the cause of the failure is discovered.

The lamp 92 is used to emit original ultraviolet light, but
Significant signatures of radiation at other wavelengths are also provided. Associated with each lamp 92 is a pair of filters 94 that pass the desired wavelengths but block other wavelengths.

What is particularly important is that the filter 94 is configured to absorb infrared rays and prevent heating of the web 60, thereby preventing thermal distortion from occurring. Filter 94 can be made from optically pure quartz. Air should be circulated over the lamp 92 and frozen air should be circulated between the surfaces of the filter 94. If there is a possibility that the web 60 will not move relative to the lit lamp 92, a shutter may be added to block the light beam from the web 60.

A first cooling station, generally designated 100, surrounds the web 60 following the first curing station 90.

First cooling station 100 includes an inlet vibe 102 and a shroud 104. The entrance vibe 102 is attached to the cover 104
the shroud is configured to direct the frozen air over the surface of the web 60.

A web flipping station 110 provides a means for flipping the web 60. A device for promoting inversion of web 60 will be described below with reference to FIG.

Following wear inversion station 110 , web 60 passes through a second printing station, generally designated 120 , which is generally identical to first printing station 70 . The second print station 120 is connected to the first print station 70 and 161.
, a flexo printing machine and a polymeric material container corresponding to the container 70! 122) Supply row 5126 corresponding to supply roller 76, measuring roller 1 corresponding to measuring roller 78
28, an impression cylinder 130 corresponding to impression cylinder 80 and a print cylinder 132 corresponding to print cylinder 82. The container 122, like the container 72, is made of an uncured polymeric material 74.
Put in.

Following the second print station 120, the web 60
is indicated generally at 140 and includes a first curing station 90
Take a second curing station, which is very similar to that of the previous one. The second curing station 140 includes a set of three mercury lamps 142 and a pair of filters 1 associated with each lamp 142.
44.

Lamp 142 and filter 14-4 correspond to lamp 92 and filter 94 of first curing station 90, respectively. If the lamp 142 is lit while the web 60 is stationary, the lamp 142 causes the web 60 to
A shutter may be provided to separate the

A second cooling station, generally designated 150, follows the second curing station 140 along the trajectory of the web 6o. The second cooling station 150 is generally similar to the first cooling station 100 and includes an inlet vibe 152 and a shroud 154 that correspond to the inlet vibe 102 and shroud 104 of the first cooling station 100 .

Following the second cooling station 150, the web 60 passes through a rotary die-cutting station, generally designated 160. The rotary punching station 160 includes a punching roller 162
and a die roller 164, the punching roller 162 having a bonder 166 thereon, and the die roller 164 having a die 168 therein. Rollers 162 and 164 allow punch 166 to pass through the area occupied by web 60 to
It is aligned to match 8. Following the rotary punching station 160, a ladder 170 consisting of the fusuma wear 60 from which the portion that formed the elastic recording disk 40 has been removed is rolled up to form a ladder roll 172. Also, multiple I
Scraps 174 are produced from web 60 by punching station 160 .

FIG. 4 shows a first print station 70 or a second print station 12 on selected portions of the surface.
A typical form of a garment 60 is shown having a polymeric material coating 48 applied thereto. (Stations 70 and 120 apply several coatings of the same shape on both sides of garment 60). The web 60 includes a plurality of circular reinforcing portions 180 that constitute a polymeric coating 48 adhered to the surface of the garment 60. ! It includes two large rectangular contour sections 182, a plurality of small rectangular contour sections 184, and a plurality of small rectangular contour sections 186, all of which constitute coating 48 of polymeric material. Circular reinforcement part 1
80, a large rectangular outer portion 182, and a small rectangular outer portion 184.

186 means that the elastic disc 40 stamped from the web 60 concentrically with respect to the central axis of the reinforcing portion 18 occupies the entire portion of the web 60 contained within the larger rectangular profile portion 182 and the smaller rectangular profile portions 184 and 186 is positioned on the web 60 so as not to include the portion defined by . One small rectangular profile section 184 is located in each of the sections defined by each alternating large rectangular profile section 182.
one small rectangular profile section 186 is located in each of the sections defined by the remaining large rectangular profile sections 18. The position of the small rectangular profile 186 is offset in the direction of movement of the web 60 from the relative position of the small rectangular profile 184 within the large rectangular profile 182 by the width of the small rectangular profile 186 .

FIG. 5 shows the state in which the disk 40 is cut from the web 60 by a punching operation using a punching roller 162 and a die roller 164. The portion 190 of the wear 60 is the die 168
Also shown is the portion of the web 60 in which the disk 40 is formed by the punching action of the punch 166.

FIG. 6 depicts an inversion mechanism, generally designated 200, that may be used to facilitate the fabrication method according to the present invention. This mechanism 200 may be used in the web reversal station 110 of FIG. The mechanism 200 includes a support frame 202
) includes an entrance roller 204, a top transition roller 206, a side transition roller 208, an exit roller 210, and a pair of air-cushioned transition bars 212. Roller 204. 20
6.

208 and 210 are rotatably mounted to support frame 202, and air cushioned displacement bar 212 is secured to support frame 202.

FIG. 7 shows Gangnam 80 in detail, as described above with respect to FIG. The impression cylinder 80 consists of a rotatable cylindrical base 240 with a cylindrical surface 242 and an elastic protrusion 244 that presses the uncured liquid polymeric material 74 onto the surface of the web 60. The typical form of 80 is its cylindrical surface 242
is entirely coated with an elastic material with integral elastic protrusions 244.

In order to create a resilient protrusion 244 that prints the desired pattern, adjustments must be made to its shape to match the cylindrical curvature of the surface 242. The impression cylinder 80 can be constructed with a relatively small diameter cylindrical base 240 and a resilient projection 244 having a single pattern, or alternatively can be constructed with a large diameter base and a projection having a large number of repeating patterns within the resilient projection 244. . According to experience,
For manufacturing a 133.1 mm (5 1/4 inch) elastic recording disk, if two patterns are used in the elastic protrusion 244, a size of 88.9 mm (3 mm) is quite easy to use.
Cylindrical base 2 with a diameter slightly above 1/2 inch)
It was shown that 40 can be obtained.

Referring now to FIG. 3, a method of fabricating an elastic recording disk 40 with a reinforced central hole will now be described. The fabrication method according to the invention is continuous and includes an elastic magnetic recording material 42.
The web 60 progresses from roll 62 at the start of the fabrication process to ladder roll 172 at the end of the fabrication process, said roll 172 being the remaining roll of elastomeric magnetic recording material 42 from which the elastomeric recording disk 40 has been removed. It is.

From roll 62 of web 60, web 60 passes over print cylinder 82 where web 60
A pattern of uncured liquid polymeric material 74 is printed by the elastic protrusions 244 of impression cylinder 80 . Elastic protrusion 24
4 transfers the uncured polymeric material 74 from the supply row 576 partially immersed in the polymeric material container 72 and transfers the material from the correction roller 78 to which the material 74 was applied. Apply. By rotatably contacting projections 244 of impression cylinder 80 with respect to web 60, a volume of uncured liquid polymeric material is transferred to the contact surface of web 60.

A typical pattern of polymeric material 74 printed on web 60 is shown in FIG. The pattern of polymeric material 74 printed on the surface of web 60 is then cured at a first curing station 90 where ultraviolet light is directed through filter 94 onto web 60 to provide the energy necessary for the curing process. I will provide a. It is necessary to cool the lamp and filter to prevent excessive heat transfer to web 60.

The web 60 is cooled to release heat absorbed during the curing process. Cooling air is circulated over the web 60 at the curing station, and frozen air is blown over the surface of the web 60 at the cooling station 100 immediately after the curing station 90.

Following cooling station 100, web 60 is inverted at web inverting station 110. In order to reverse the web 60 at the wear reversing station 110, a reversing mechanism 200 as shown in FIG. 6 may be used. The arrow in the threading direction shown in FIG.
Shows how to pass 0. Using air-cushioned transition bars instead of rollers for 45 degree bends tends to reduce alignment and result in lateral movement of the garment at the transition. Although other mechanisms may be used to invert the web, inverting station 1
The length of the wear within 00 is constant, so the first
Preferably, the mechanism is such that it facilitates maintaining proper alignment of the web 60 between the second print station 70 and the second print station 120.

Following the wear inversion station 110, the web is transferred to a second
to a print station 120, except that the print station prints a pattern of uncured liquid polymeric material on the side of the web 60 opposite the surface of the web 60 printed at the first print station 70. The function is generally the same as that of the first print station 70. Printing on the second side 86 of the web 60 at the print station 120 is performed on the first side 86 of the web 60.
The pattern must be such that it prints a pattern opposite to that of the surface 84 of. Large rectangular outline part 1
82 and a small rectangular profile 184 may be used to help establish proper alignment between print stations 70 and 120.

Following the second print station 120, the polymeric material is cured by ultraviolet light at a curing station 140, generally similar to the curing at curing station 90, and the garment is then cooled at a cooling station 150, which operates generally similarly to the cooling station 100. Ru.

The elastic recording disk 40 is then cut from the web 60 by rotary punching at a rotary punching station 160 where the moving web 60 is cut through the web 60 by a punch 166 into a die 168. It is punched out as it enters. The rotary punching station and the web 60 must be properly aligned so that the circular central opening 29 of the elastomeric recording disk 40 and the circular reinforcement portion 180 are in a concentric relationship. The aperture 29 is punched out so that its diameter, which represents the cutting surface of the die 168 during punching, lies in the reinforcing portion 180, so that a frontage is created through the disc 40 and the coating 48 of polymeric material in the same operation. Coating 48 of polymeric material actually facilitates the punching operation and makes the surface of aperture 29 in disc 40 smoother than it would be without coating 48.

Alternative embodiments of the invention include the use of electron or infrared radiation instead of ultraviolet radiation to cure the polymeric material 74 in curing stations 90 and 140.

Although the invention has been described in terms of presently preferred embodiments, it is to be understood that this disclosure is not to be construed in a limiting sense.

Various alternatives and modifications will become apparent to those skilled in the art upon reading the description of the navigational disclosure.

It is therefore intended that the appended claims be interpreted as covering all alternatives and modifications falling within the true spirit and scope of the invention.

[Brief explanation of drawings]

1 is a perspective view of a floppy disk assembly incorporating an elastic disk with a reinforcing structure in the area of the central opening according to the prior art; FIG. A cross-sectional view of a portion of an unjacketed elastic disk, taken along line 2--2 in FIG. 1, with the exception that: FIG. FIG. 4 is a top view of a portion of the web from which an elastic disc is made by the method according to the invention, shown after the method according to the invention has been partially completed; FIG. FIG. 5 is a schematic cross-sectional view of the punch and die showing the uniform position of web alignment during the punching process and is shown in flattened form for illustrative purposes; FIG. 6 is a web inversion that can be used to carry out the method according to the invention. A front view of the mechanism; and FIG. 7 is a perspective view of the impression cylinder used in the method according to the invention. In the figure, 27...disc, 29...center opening, 40...reinforcement disk, 42...recording material, 44...center Opening, 48... coating, 60... web, 70...
First printing station, 72...Container, 74
...Polymer material, 80 ... Impression cylinder, 81
...First side, 86...Second side, 9
0...Curing station, 100...
First cooling station, 110... web reversal station, 120... second printing station, 130... impression cylinder, 140...
Second hardening station, 150... Second cooling station, 160... Rotary punching station, 166... Punch, 168...
・Die, 200... Reversing mechanism, 244...
··protrusion.

Claims (14)

[Claims] (1) A method for manufacturing an elastic recording disk with a reinforced opening area, which comprises: transferring a certain amount of the polymeric material from a container to an impression cylinder having elastic protrusions shaped to print a pattern of the uncured polymeric material; transferring at least a portion of the amount of uncured liquid polymeric material from the resilient protrusion of the impression cylinder to a first surface of the resilient magnetic material; curing the polymeric material; cutting the elastic disk from the elastic magnetic material with a central aperture in the portion of the magnetic material coated with the cured polymeric material; A method for manufacturing an elastic recording disk, characterized in that the elastic recording disk is manufactured in a form provided with a reinforcing structure. (2) Producing an elastic recording disk in the method according to claim 1, further comprising the step of cooling the elastic magnetic material by bringing flowing air into contact with the elastic magnetic material. how to. (3) A method for manufacturing an elastic recording disk according to claim 2, characterized in that the flowing air is cooled to below room temperature (refrigeration) before contacting the elastic magnetic material. . (4) In the method according to claim 1, a fixed amount of uncured liquid polymeric material is transferred from the second container to a second impression cylinder having an elastic protrusion shaped to print a pattern. transferring the polymeric material of the second impression cylinder from the elastic protrusion of the second impression cylinder to a second portion of the elastic magnetic material opposite to the first surface portion of the elastic magnetic material previously coated with the polymeric material; transferring at least a portion of the amount of uncured liquid polymeric material to a surface; further comprising curing a polymeric material on the second surface of the elastic magnetic material; A method for manufacturing an elastic recording disk, characterized in that the elastic recording disk is manufactured in a form having reinforcing structures on both sides of the surface. (5) The method according to claim 4, wherein the elastic protrusion of the second impression cylinder is formed after the step of curing the polymeric material on the first surface of the elastic magnetic material. an elastic recording disk further comprising the step of inverting the elastic magnetic material prior to the step of transferring a significant portion of the amount of uncured polymeric material from the elastic material to the second side of the elastic material. How to make. (6) The method according to claim 1, wherein a significant portion of the amount of uncured liquid polymeric material is transferred from the elastic protrusion of the impression cylinder to the first surface of the elastic magnetic material. moving the elastic magnetic material across the rotating cylinder and simultaneously rotating the surface of the elastic protrusion of the impression cylinder such that the elastic protrusion of the impression cylinder contacts the first surface of the elastic magnetic material. Adapting the surface velocity of the elastic protrusion of the impression cylinder to the surface velocity of the first surface of the elastic magnetic material during contact to bring the surface of the elastic protrusion into contact with the first surface of the elastic magnetic material, and then remove it. A method of manufacturing an elastic recording disk characterized by: (7) A method according to claim 1, characterized in that the step of curing the polymeric material on the first side of the elastic magnetic material is accomplished by irradiating the polymeric material with ultraviolet light. A method of manufacturing an elastic recording disk. (8) In the method according to claim 4, the step of curing a polymeric material on the first surface of the elastic magnetic material, and curing the polymeric material on the second surface of the elastic magnetic material. A method of producing an elastic recording disk, characterized in that both processes are achieved by irradiating the polymeric material with ultraviolet light. (9) The method according to claim 1, characterized in that the step of curing the polymeric material on the first surface of the elastic magnetic material is accomplished by irradiating the polymeric material with electrons. A method of manufacturing an elastic recording disk. (10) In the method according to claim 4,
Both the process of curing the polymeric material on the first surface of the elastic magnetic material and the process of curing the polymeric material on the second surface of the elastic magnetic material are achieved by irradiating the polymeric material with electrons. A method of manufacturing an elastic recording disk, characterized in that: (11) In the method according to claim 1,
A method for producing an elastic recording disk, characterized in that the step of curing the polymeric material on the first side of the elastic magnetic material is achieved by irradiating the polymeric material with infrared light. (12) In the method according to claim 4,
Both the curing of the polymeric material on the first surface of the elastic magnetic material and the curing of the polymeric material on the second surface of the elastic magnetic material are performed by irradiating the polymeric material with infrared light. A method for producing an elastic recording disk characterized in that it is achieved. (13) In the method according to claim 1,
The process of cutting an elastic disk from an elastic magnetic material is accomplished by moving the elastic magnetic material across a rotating die and punching the disk by rotating a punch through the magnetic material and into the rotating die. A method for producing an elastic recording disk characterized by: (14) The method according to claim 5, further comprising the step of cooling the elastic magnetic material by contacting it with flowing air at a temperature below room temperature; the first and second surfaces of the elastic magnetic material. said step of curing the polymeric material is accomplished by irradiating the polymeric material with ultraviolet light; and said step of cutting the elastic disk from the elastic magnetic material involves movement of the elastic magnetic material across a rotating die. and punching the disk by rotating a punch through the magnetic material into the rotating die.