JP2006202370A - Magnetic tape manufacturing method and system, and its tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a magnetic tape which can eliminate a tracking error and a defect of the magnetic tape by eliminating the tension irregularity of the magnetic tape in a tape cutting section. <P>SOLUTION: In the manufacturing method of the magnetic tape in which a raw fabric of the magnetic tape is conveyed to a cutting device through an upstream conveyance roller, the magnetic tape raw fabric is cut to a predetermined width by the cutting device, and the cut magnetic tape is taken up through a downstream conveyance roller, a non-rotating long axis member is arranged at least either between the upstream conveyance roller and the cutting device and between the cutting device and the downstream conveyance roller in the perpendicular direction to the conveyance direction of the magnetic tape and in a state of the contacting with the magnetic tape lightly. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for manufacturing a magnetic tape employed in a one-reel cartridge or the like, and more particularly to a method and apparatus for cutting a tape edge.

  In the manufacturing process of various magnetic tapes used for computer data backup, including cassette tapes and video tapes, a wide magnetic tape roll wound in a bulk shape on a supply reel is made up of a plurality of guide rollers, etc. And is continuously conveyed from the upstream conveying roller to the cutting device. Then, in the process of passing between the rotating upper blade and the rotating receiving blade of this cutting device, the original magnetic tape is cut into a plurality of magnetic tapes, and each cut magnetic tape is transferred to the winding hub of the winding device. It is wound up sequentially.

  For cassette tapes, video tapes, etc., it is required that the variation of the width dimension of each magnetic tape cut by a cutting device be within ± 6 μm (in range). In the magnetic tape to be used, the servo signal is written on the servo track along the reference edge on at least one side in the width direction by the servo writer in advance, and the variation in the width dimension is within a more severe range of ± 6 μm. Is required to fit in.

  5A and 5B are conceptual diagrams for explaining a conventional magnetic tape cutting device. FIG. 5A is a side view of the whole, and FIG. 5B is a front view of a main part of the cutting device. In the figure, 80 is a conventional magnetic tape manufacturing apparatus, 81 is a cutting apparatus that cuts a wide magnetic tape G into a plurality of magnetic tapes T of a predetermined width, and 82 is a magnetic tape from the raw tape to the cutting apparatus 81. An upstream-side transport roller 83 for transporting is a downstream-side transport roller for transporting the magnetic tape T cut by the cutting device 81 to the winding side.

  As shown in FIG. 5 (b), the cutting device 81 has a plurality of disk-shaped rotating upper blades 812 for cutting the original magnetic tape into a plurality of magnetic tapes on the upper blade shaft 811 at regular intervals. And a plurality of rotary receiving blades 814 configured in a roller shape so as to rub against the rotating upper blade 812. The shafts 811 and 813 each rotate on a frame 817. Installed as possible.

  The shaft 811 and the shaft 813 are provided with gears 815 and 816, respectively, which are in mesh with each other. The rotary shaft 811 of the rotary upper blade 812 is rotationally driven by a drive motor. Therefore, when the rotation shaft 811 of the rotary upper blade 812 rotates, the rotation is transmitted to the shaft 813 at a constant rotation speed ratio.

Next, the operation of the conventional magnetic tape manufacturing apparatus will be described.
When a wide magnetic tape G is transported from an unillustrated magnetic tape raw material (pancake) on the upstream side to the cutting device 81 via the upstream-side transport roller 82, the cutting device 81 has its rotating upper blade 812 and The magnetic tape G is cut into a plurality of magnetic tapes T having a predetermined width by the rotary receiving blades 814 and conveyed to the winding side (not shown) via the downstream-side conveyance roller 83.
However, even when such a high-accuracy cutting device is used to manage the variation in the width dimension of the magnetic tape within ± 5 μm, tracking is performed when a servo signal is written on the magnetic tape by the servo writer. An error occurred and the magnetic tape sometimes became defective. The reason for this is that, in the cutting device, the supplied magnetic tape raw material is wound around each rotary receiving blade and conveyed to cut the magnetic tape original fabric into a plurality of magnetic tapes with each rotary receiving blade. This is because, when the axial accuracy of the rotating shaft of the rotary receiving blade (that is, the level and deflection, or the parallelism of the rotating blade with respect to the rotating shaft) is low, a large meandering occurs at the edge of the cut magnetic tape.

Therefore, as prior arts for eliminating the meandering of these magnetic tape edges, those disclosed in Patent Document 1 and Patent Document 2 are known.
JP 2003-200380 A JP 2003-233904 A

  The invention described in Patent Document 1 provides a cutting device capable of cutting a magnetic tape material into a tape while suppressing fluctuations in the width of the magnetic tape and fluctuations in the width direction. A wide web is divided into a plurality of narrow tapes. Forming a main body having a cutting blade for cutting into a sheet and a conveying roller for conveying a web cut by the cutting blade, and a driving unit for driving the cutting blade and the conveying roller, and separating them from each other Is to be placed.

In addition, the invention described in Patent Document 2 provides a magnetic tape having a small standard deviation and off-track amount and excellent servo characteristics. For this purpose, a tracking control servo signal is recorded on the magnetic layer. When the tape traveling speed is V [mm / second], the period of the tape edge is f [mm], the edge weave amount is α [μm], and the recording track width is W [μm], (α / W) × (V / f) is set to 10 [s-1] or less, and α / W is set to 0.11 or less.
By taking the above-mentioned measures for the meandering of these magnetic tape edges, it has become possible to greatly solve the tracking error.

However, despite taking the above measures, tracking errors sometimes still occur.
Then, when the cause was pursued, it was finally found that the fluctuation in the tension of the magnetic tape at the tape cutting part was another cause.

In the invention described in Patent Document 1, although the vibration of the cutting device itself can be suppressed, the fluctuation in the tension of the magnetic tape in the tape cutting part cannot be suppressed,
Further, although the invention described in Patent Document 2 can suppress the propagation of the tension fluctuation using the mesh suction tension cut roller, the tension cut roller itself rotates, so that the tension fluctuation caused by the rotation of the tension cut roller does not occur. There was a risk of being induced, and this could not be suppressed.

FIG. 6 is a plan view for explaining an estimation mechanism in which the tension variation of the magnetic tape occurs in the tape cutting portion in the conventional apparatus of FIG.
In the figure, when the upstream conveying roller 82 rotates and vibrates, the roller 82 changes to a direction slightly away from the cutting device 81 due to the vibration, and the magnetic tape G1 is strongly pulled by receiving a tension larger than a predetermined tension. Therefore, the width of the magnetic tape is shortened from G1 to G1 ′, and in this state, the cutting device 81 is cut by the 12 rotary upper blades C1 to C12 (FIG. 5b). And each rotary upper blade C1-C12 of the cutting device 81 cuts at a fixed interval irrespective of this even if the magnetic tape G1 is pulled and the length in the width direction becomes short like the magnetic tape G1 ′. Then, the tape is cut in a state of the pulled magnetic tape G1 ′ (a state in which the width direction is B ′ smaller than the predetermined B by ΔB), and then the tension is restored to the original state (the width direction size is B). The tape after cutting has a width slightly larger than the predetermined tape width, and then when the roller returns to 82 again from the state of 82 ', the magnetic tape G1 is in a predetermined tension state. Since it is cut, a predetermined tape width B is obtained.
By repeating this, meandering with a small amplitude (that is, a small energy) meanders at the tape edge in a short period due to the rotational vibration of the upstream conveying roller 82.
For such meandering with a short cycle (ie, high frequency), a heavy head cannot follow the meandering, resulting in a tracking error.

  Accordingly, an object of the present invention has been made to solve the above-described problems, and eliminates fluctuations in the tension of the magnetic tape in the tape cutting part by preventing the vibration caused by the rotation of the conveying roller from propagating to the tape cutting part. Accordingly, it is an object of the present invention to provide a magnetic tape manufacturing method, apparatus, and magnetic tape that can eliminate a tracking error and eliminate defects in the magnetic tape.

In order to solve the above-mentioned problems, the invention according to claim 1 relates to a method of manufacturing a magnetic tape, wherein the magnetic tape original is conveyed to a cutting device via an upstream conveying roller, and the magnetic tape original is conveyed by the cutting device. In the method of manufacturing a magnetic tape, in which the opposite side is cut to a predetermined width and the cut magnetic tape is wound up via the downstream side transport roller, between the upstream side transport roller and the cutting device, and between the cutting device and the downstream side A non-rotating long shaft member is disposed in at least one of the side conveying rollers in a direction perpendicular to the conveying direction of the magnetic tape and in light contact with the magnetic tape.
According to a second aspect of the present invention, in the magnetic tape manufacturing method according to the first aspect, a portion of the non-rotating long shaft member that contacts the magnetic tape is formed in an arc shape.
According to a third aspect of the present invention, in the magnetic tape manufacturing method according to the second aspect of the invention, the magnetic tape holding angle of the non-rotating long shaft member is set to 2 to 15 °.
According to a fourth aspect of the present invention, in the magnetic tape manufacturing method according to the third aspect, the non-rotating long shaft member is made of ceramic zirconia, stainless steel, or iron.

The invention according to claim 5 relates to a magnetic tape manufacturing apparatus, a cutting device that cuts the original magnetic tape into a predetermined width, an upstream conveying roller that conveys the magnetic tape to the cutting device, and In a magnetic tape manufacturing apparatus comprising a downstream conveying roller that conveys a magnetic tape cut by a cutting device, between the upstream conveying roller and the cutting device, and between the cutting device and the downstream conveying roller At least one of them is provided with a non-rotating long shaft member disposed in a state perpendicular to the conveying direction of the magnetic tape and in light contact with the magnetic tape.
According to a sixth aspect of the present invention, in the magnetic tape manufacturing apparatus according to the fifth aspect, the non-rotating long shaft member is attached to an attachment frame of the cutting device.

  According to the above configuration, the non-rotating long shaft member is disposed in a direction perpendicular to the magnetic tape conveyance direction and in a state where it is in light contact with the magnetic tape, so that the high frequency of the upstream conveyance roller and the downstream conveyance roller can be reduced. The fact that rotational vibration propagates through the magnetic tape and reaches the cutting blade of the cutting device is absorbed by the non-rotating long shaft member, so that there is no small tension fluctuation at the high frequency of the magnetic tape at the tape cutting portion, and therefore no tracking error occurs. .

In addition, due to the shaft accuracy of the rotating blade's rotating shaft (that is, the degree of horizontality and deflection, or the parallelism of the rotating blade with respect to the rotating shaft, etc.), eccentricity of the conveying roller shaft center, uneven roller diameter, bearing accuracy, etc. The magnetic tape edge meandering has a considerably larger amplitude than the target meandering here, but this is also a long period (low frequency), so the tracking servo due to this large meandering causes the head to servo track Therefore, there is no problem because it can be solved systematically.
Accordingly, the tracking error cannot be dealt with by meandering with a small tape edge due to high-frequency tension fluctuations due to the small amplitude due to the rotation vibration of the transport roller. According to the present invention, tracking is achieved by removing this small meandering. The error can be solved.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1A and 1B are conceptual diagrams for explaining a magnetic tape manufacturing apparatus according to the present invention. FIG. 1A is a side view of the whole, and FIG.
In the figure, 10 is a magnetic tape manufacturing apparatus according to the present invention, 11 is a cutting apparatus for cutting a wide magnetic tape G from a magnetic tape raw material into a plurality of magnetic tapes T of a predetermined width, and 12 is a cutting of a wide magnetic tape G. An upstream side conveyance roller for conveying to the apparatus 11 and a downstream side conveyance roller 13 for conveying the magnetic tape T cut by the cutting apparatus 11 to the winding side.
The cutting device 11 includes a plurality of disk-shaped rotating upper blades 112 for cutting a magnetic tape material into a plurality of magnetic tapes on the upper blade shaft 111 at regular intervals, as shown in FIG. And a plurality of rotary receiving blades 114 configured in a roller shape so as to rub against the rotating upper blade 112 are arranged on the receiving blade shaft 113, and each shaft 111, 113 is rotatable to the frame 117. Installed. Gears 115 and 116 are provided on the shaft 111 and the shaft 113, respectively, and the gears 115 and 116 mesh with each other, whereby the rotation of the shaft 111 is transmitted to the shaft 113 at a constant rotation speed ratio. The rotary shaft 111 of the rotary upper blade 112 is rotationally driven by a drive motor.
Since the operation of the cutting device 11 is substantially the same as that of the conventional cutting device 81, duplicate description is omitted.

  In such a configuration, according to the present invention, the non-rotating long shaft member 14 that does not include a rotating portion such as a rotating roller, that is, a round bar, is disposed between the cutting device 11 and the upstream conveying roller 12 and non-rotating. The rotating long shaft member 15 is characterized in that it is disposed between the cutting device 11 and the downstream conveying roller 13. At this time, the non-rotating long shaft members 14 and 15 are both disposed in a direction perpendicular to the conveying direction and in light contact with the magnetic tapes G and T. The non-rotating long shaft members 14 and 15 are attached to a fixing member 118 fixed to an attachment frame 117 of the cutting device 11.

Next, the function of the non-rotating long shaft member 15 will be described with reference to FIG.
When the wide magnetic tape G is conveyed to the cutting device 11 via the upstream conveying roller 12 from the magnetic tape raw material (not shown) on the upstream side, the upstream conveying roller 12 is rotated, and thus is caused by the rotation. A vibration with a small amplitude is generated at a high frequency, and this vibration propagates through the magnetic tape G and tries to reach the cutting device 11. However, the vibration is attenuated by the non-rotating long shaft member 14 on the way to the cutting device 11. It will not reach. Accordingly, since the tension of the magnetic tape due to the high-frequency vibration of the upstream conveying roller 12 is eliminated in the cutting device 11, the tape is always cut under the same tension, so that there is no meandering at the tape edge and no tracking error occurs. .

  Further, since the non-rotating long shaft members 14 and 15 are attached to the attachment frame 117 of the cutting device 11 via the fixing member 118, they move in the same system with respect to external vibrations. The vibrations of the non-rotating long shaft members 14 and 15 do not affect the tension variation of the magnetic tape at the tape cutting portion.

FIG. 2 is a plan view for explaining a mechanism in which tension variation does not occur in the magnetic tape at the cutting portion in the apparatus according to the present invention shown in FIG.
In the figure, when the upstream-side transport roller 12 rotates, vibration due to the rotation occurs. Assuming that the roller 12 slightly fluctuates in the direction away from the cutting device 11 due to the vibration, the magnetic tape G1 receives a tension larger than a predetermined tension and is pulled strongly, so the width of the magnetic tape is G1. To G1 ′. However, since the variation in tension is small, it is absorbed by the non-rotating long shaft member 14 and does not propagate to the cutting device 11 side. Return to G1. Since the cutting device 11 always cuts the magnetic tape with the width G1, the cutting device 11 cuts with the predetermined tape width B. When the roller 12 'is moved from the roller 12' to 12 by the vibration of the roller and returns to its original state, the magnetic tape G1 is cut in a predetermined tension state, so that the predetermined tape width B is obtained. As described above, even if the upstream-side transport roller 12 vibrates due to rotation, the tape width is always cut while the predetermined width B is maintained, and therefore no meandering occurs at the tape edge.

  The vibration caused by the eccentricity of the conveying roller shaft center and the non-uniform bearing accuracy of the roller diameter has a large amplitude (energy), and therefore cannot be absorbed by the non-rotating long shaft member 14 here. , And reaches the cutting device 11 and is cut with a large meandering. However, since this is also a long period (low frequency) at the same time, the tracking error caused by this large meandering can be caused to systematically solve the problem since the head can follow the servo track.

  Therefore, the object to be removed is only a high frequency that causes a tracking error superimposed on a large meandering (for example, an amplitude of 1 μm or more) 2a at a low frequency (for example, 100 Hz or less, with a period of 100 mm). The presence of small meandering (for example, the amplitude is 0.04 μm or less) (for example, 200 Hz or more, with a period of 40 mm or less) is an object of the present invention.

3A and 3B are schematic enlarged views illustrating the meandering of the edge of the magnetic tape. FIG. 3A is an edge of the magnetic tape manufactured by the apparatus of the present invention (FIG. 1), and FIG. The edges of the magnetic tape are shown respectively.
In the figure, reference numeral 2a denotes a magnetic tape edge due to an error on the system due to axial accuracy of the rotary shaft of the rotary blade (that is, horizontality or deflection, parallelism with respect to the rotary shaft of the rotary blade, etc.), bearing accuracy, or the like. The generated large amplitude (about 1 μm or more) and the meandering of a low waviness period (about 100 mm or less, frequency is about 100 Hz or less), 2b is a small amplitude (about 0.08 μm) caused by the rotation of the conveying roller investigated by the present invention. ) And a high waviness cycle (about 40 mm or less, with a frequency of 200 Hz or more).

2B, (a) shows the edge of the magnetic tape manufactured by the conventional apparatus shown in FIG. 8, and (B) shows the edge of the magnetic tape manufactured by the apparatus described in Patent Document 1. In FIG.
In (a), a situation is observed in which the meander 2b having a small high waviness period is superimposed on the edge E of the magnetic tape T on the meander 2a having a large low waviness period.
On the other hand, in (b), the state where the meander 2b having a small high waviness period is superimposed on the meander 2c having a low waviness period on the edge E of the magnetic tape T can be seen.
Since the meander 2b having a small high waviness period formed in both figures has a high frequency, the head having a large inertia cannot follow the meander, resulting in a tracking error.
Although it is preferable that there is no large meandering as in (b), even if there is a large meandering as in (b), it is possible to take measures such as making the head follow the meandering for tracking errors due to large meandering. There is no problem because it is possible.
Therefore, the only problem here is the presence of the small meandering 2b of high frequency that causes the tracking error superimposed on the large meandering 2a, and it is necessary to remove this.

2 (a), (a) is an edge of a magnetic tape manufactured by the manufacturing apparatus according to the present invention, and (b) is an edge of a magnetic tape manufactured by applying the present invention to the apparatus described in Patent Document 1. Respectively.
In (a), a large meander 2a is seen at the edge E of the magnetic tape T, but a small meander 2b is hardly formed. Thus, in the magnetic tape manufactured by the manufacturing apparatus according to the present invention, even if the edge of the magnetic tape has a large meander 2a having an amplitude of 1 μm or more with a long period of 100 mm or more, it is as short as 40 mm or less. Since there is no high-frequency (200 Hz to 300 Hz) meandering 2b with an amplitude that induces a tracking error in which meandering with an amplitude of 0.04 μm or less is removed in the period, there is no need for a head with high inertia to follow the meandering of a short period , Tracking errors no longer occur.
On the other hand, in (b), the large meander 2a and the small meander 2b are hardly formed on the edge E of the magnetic tape T.

The non-rotating long shaft members 14 and 15 are preferably made of ceramic zirconia, stainless steel, or iron because of good sliding, less wear, and low material costs.
Further, if the shape of the non-rotating long shaft members 14 and 15 has a rotating portion, vibration is generated there, so that the rotating portion must be avoided. As long as it does not rotate, any material such as a polygonal bar or a round bar may be used, but a curved surface on which the magnetic tape can be conveyed with a holding angle is particularly preferable.

  In addition, the larger the number of non-rotating long shaft members, the smaller the amplitude of the undulation, but conversely, the back surface of the magnetic tape is rubbed many times, so that the back surface is more likely to be scratched or dusty. In addition, since another adverse effect that it is necessary to increase the tension of the entire system, one non-rotating long shaft member is sufficient for each upstream and downstream of the cutting device.

  Also, if the non-rotating long shaft member is placed only upstream of the cutting device, vibration from the upstream conveying roller can be suppressed, but vibration from the downstream conveying roller is still transmitted to the cutting device, so the effect is halved. It is preferable to place one on each of upstream and downstream.

<Example 1>
As Example 1, the transport speed of the tape is 7000 mm / sec,
The outer diameter of the transport roller is 90 mm, the distance between the transport roller and the cutting device is 200 mm,
The thickness of the original magnetic tape is 9 mm, the length in the width direction is 1200 mm,
Raw tape tension 80N, magnetic tape width 2.65mm,
The non-rotating long shaft member is a round bar having a diameter of 1 cm (one upstream and one downstream), the manufacturing apparatus (Example 1) including the non-rotating long shaft member according to the present invention, and the non-rotating long shaft member. Magnetic tapes were produced respectively with no conventional device.
FIG. 4 is a graph showing experimental results of magnetic tapes manufactured by the apparatus according to the present invention and the conventional apparatus, respectively.
In the figure, the vertical axis is the amplitude of the waviness (μm), the horizontal axis is the magnetic tape manufactured by the conventional device and the right is the device according to the present invention. In the present invention, the holding angle of the non-rotating long shaft member is , (1) is 2 °, (2) is 7 °, and (3) is 15 °.

As can be seen from the figure, when the tape edge waviness period is 40 mm or less, the waviness amplitude is 0.08 in the conventional device, but the non-rotating long shaft member according to the present invention causes the waviness amplitude to be 0. To decrease around 0.02. When the holding angle was increased (2 ° → 7 ° → 15 °), the amplitude of the swell decreased (0.025 μm → 0.023 μm → 0.020 μm).
However, when the holding angle is increased to 20 ° or more, the amplitude of the waviness is reduced, but conversely, since the frictional force of the back surface of the magnetic tape increases, another adverse effect such as rubbing the back surface appears. The angle is preferably in the range of 2 ° to 15 °.

The above was the case of Example 1 (tape transport speed of 7000 mm / sec), but it was good not only in the range of 7000 mm / sec but also in the range of 5000 mm / sec to 8000 mm / sec. Further, the outer diameter of the conveying roller was not only 90 mm, but also 50 mm to 100 mm and the length in the width direction were good not only 1200 mm but also 800 mm to 1300 mm.
Further, the above is an example of a one-reel cartridge. However, the present invention is not limited to a one-reel cartridge, and even if it is a two-reel cassette type, meandering of the tape edge occurs. Needless to say, the present invention can also be applied to such a case.

It is a side view which shows the concept of the whole magnetic tape manufacturing apparatus based on this invention. FIG. 2 is a plan view for explaining a mechanism in which tension variation does not occur in the magnetic tape at the cutting portion in the manufacturing apparatus according to the present invention in FIG. 1. FIG. 3 is a schematic enlarged view illustrating the meandering of the edge of the magnetic tape, where (a) is the edge of the magnetic tape manufactured by the apparatus of the present invention (FIG. 1), and (b) is the magnetic manufactured by the conventional apparatus (FIG. 9). Each edge of the tape is shown. It is a graph which shows the experimental result of the magnetic tape each manufactured by the apparatus which concerns on this invention, and the conventional apparatus. It is a conceptual diagram explaining the conventional magnetic tape cutting device, (a) is a whole side view, (b) is a principal part front view of a cutting device. FIG. 6 is a plan view for explaining a mechanism in which the tension variation of the magnetic tape occurs in the tape cutting portion in the conventional apparatus of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Magnetic tape manufacturing apparatus 11 Cutting apparatus 12 Upstream conveying roller 13 Downstream conveying roller 14, 15 Non-rotating long shaft member 111 Upper blade shaft 112 Rotating upper blade 113 Receiving blade shaft 114 Rotating receiving blade 115, 116 Gear 117 frames

Claims (6)

The original magnetic tape is conveyed to a cutting device via an upstream conveying roller, the magnetic tape original is cut into a predetermined width by the cutting device, and the cut magnetic tape is wound up via a downstream conveying roller. In the manufacturing method of magnetic tape,
A non-rotating long shaft member is disposed perpendicular to the magnetic tape conveying direction and at least one of the magnetic field between the upstream conveying roller and the cutting device and between the cutting device and the downstream conveying roller. A method for producing a magnetic tape, characterized in that the magnetic tape is disposed in a state of light contact with the tape.   2. The method of manufacturing a magnetic tape according to claim 1, wherein the non-rotating long shaft member has a circular arc shape at a portion contacting the magnetic tape.   3. The method of manufacturing a magnetic tape according to claim 2, wherein the magnetic tape holding angle of the non-rotating long shaft member is 2 to 15 [deg.].   4. The method of manufacturing a magnetic tape according to claim 3, wherein the non-rotating long shaft member is made of ceramic zirconia, stainless steel, or iron. A cutting device that cuts the original magnetic tape into a predetermined width, an upstream conveying roller that conveys the magnetic tape to the cutting device, and a downstream conveying roller that conveys the magnetic tape cut by the cutting device; In a magnetic tape manufacturing apparatus comprising:
A state of lightly contacting the magnetic tape in a direction perpendicular to the magnetic tape conveying direction between at least one of the upstream conveying roller and the cutting device and between the cutting device and the downstream conveying roller. An apparatus for producing a magnetic tape, comprising: a non-rotating long shaft member disposed in a step.   The magnetic tape manufacturing apparatus according to claim 5, wherein the non-rotating long shaft member is attached to an attachment frame of the cutting device.

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