Tape reel and tape cartridge having the same
There is provided a tape reel in which any of an upper flange and a lower flange is formed on both ends of a cylindrical hub having a magnetic tape wound therearound. A ring-shaped groove is formed on at least one of upper and lower ends of the outer circumference surface of the hub. Thereby, it is possible to prevent a tape edge of the magnetic tape from shifting onto any of the flanges and contain the tape edge of the magnetic tape in the groove when the magnetic tape is shifted onto the flanges.
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This application claims the foreign priority benefit under Title 35, United States Code, §119 (a)-(d), of Japanese Patent Application No. 2006-126056 filed on Apr. 28, 2006 in the Japan Patent Office, the disclosure of which is herein incorporated by reference in its entirety.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates to a tape reel and a tape cartridge having the same, and more particularly to a tape reel having a tape such as a magnetic tape wound thereon and a tape cartridge having the same.
2. Description of the Related Art
As an external recording medium for a computer and the like, there has been known, for example, a magnetic tape cartridge, in which a cartridge case contains a tape reel having a magnetic tape wound thereon. Generally, the tap reel includes a hub, which is the center axle of the tape reel and has a magnetic tape wound around the outer circumference of the hub, and a pair of flanges, which radially project from the both axial ends of the hub toward the outside. For instance, the Japanese Laid-open Patent Application No. 2006-65988 discloses this kind of tape reel.
Magnetic tapes have been manufactured by reducing the thickness of the tapes and increasing the length of the tapes to be wound on tape reels so as to have a high storage capacity. Furthermore, when one of flanges and a hub are integrally formed, the tape reel, which is formed by resin molding, is provided with a rounded portion (R-shaped portion) at the corner where the flange and the hub are in contact with each other, so that it is possible to easily remove the tape reel from a molding die and prevent an excessive stress from being applied to the corner due to stress concentration. For this reason, the hub and the flange are not perpendicular to each other at the corner.
With reference to
As shown in
As shown in
The present invention has been accomplished in view of the above problem and has an object to provide a tape reel and a tape cartridge having the tape reel, by which it is possible to prevent a tape edge of a tape from being shifted onto a flange at the beginning of winding the tape and to prevent radial stripes from occurring on the tape wound on the tape reel.
According to one aspect of the present invention, there is provided a tape reel comprising a cylindrical hub having a tape wound therearound and a first flange and a second flange respectively provided on both ends of the hub. In the tape reel, the hub includes a ring-shaped groove on at least one of both end portions of an outer circumference surface of the hub.
When a tape, such as a magnetic tape, is wound around the outer circumference surface of the hub of the tape reel, the magnetic tape can slide from the center of the hub and be shifted to the first or second flange because of a slip between the hub and the magnetic tape or misalignment of the position of the magnetic tape on the hub at the beginning of the winding. In such a case, the width-direction edge of the magnetic tape crosses over the ring-shaped groove along the outer circumference surface of the hub and contacts the flange at a substantially right angle. Then, a normal force is exerted on the magnetic tape from the flange in the width direction of the magnetic tape, thereby making it difficult to have the magnetic tape further shifted to the flange.
When the magnetic tape is further shifted to the flange against the normal force applied from the flange, the width-direction edge of the magnetic tape, which is shifted onto the flange, is bent into the groove. Therefore, the magnetic tape further wound on the magnetic tape shifted onto the flange can be placed substantially parallel to the outer circumference surface of the hub without having any influence from the bent edge of the first wound magnetic tape.
According to another aspect of the present invention, there is provided the tape cartridge comprising the tape reel, a tape wound around the outer circumference surface of the hub of the tape reel, and a cartridge case rotatably containing the tape reel.
The tape cartridge contains the tape reel having the tape wound around the hub, which includes the ring-shaped groove formed on both ends of the hub, thereby making it possible to provide the tape cartridge capable of preventing the stripes on the tape wound on the tape reel.
The tape cartridge may have a configuration wherein the tape is provided with a curvature in a longitudinal direction of the tape, and the hub includes the groove on one of the both end portions of the outer circumference surface of the hub at an inner side of the curvature.
By this configuration, it is unnecessary to form the grooves on one of the both end portions of the hub, thereby simplifying the manufacturing process.
According to a still further aspect of the present invention, there is provided a method of manufacturing a tape reel including a cylindrical hub having a tape wound therearound and first and second flanges respectively provided on both ends of the hub. The method comprises the steps of integrally forming the hub and the first flange by injection molding, forming the second flange by injection molding, forming a first ring-shaped groove on a contact point of the hub and the first flange, and assembling the hub, the first flange, and the second flange.
Thereby, it is possible to prevent the tape from being shifted onto the flange at the beginning of winding the tape on the tape reel. Even when the tape is shifted onto the flange, the edge of the magnetic tape is bent into the groove and the magnetic tape further wound on the magnetic tape shifted onto the flange can be placed on the hub without any influence from the bent edge of the magnetic tape, thereby preventing the stripes on the tape wound on the tape reel.
According to a still further aspect of the present invention, there is provided a method of manufacturing a tape reel including a cylindrical hub having a tape wound therearound and first and second flanges respectively provided on both ends of the hub. The method comprises the steps of forming the hub having a ring-shaped groove on at least one of both end portions of an outer circumference surface of the hub by injection molding, forming a first flange by injection molding, forming a second flange by injection molding, and assembling the hub, the first flange, and the second flange.
Thereby, it is possible to prevent the tape from being shifted onto the flange at the beginning of winding the tape on the tape reel. Even when the tape is shifted onto the flange, the edge of the magnetic tape is bent into the groove and the magnetic tape further wound on the magnetic tape shifted onto the flange can be placed on the hub without any influence from the bent edge of the magnetic tape, thereby preventing the stripes on the tape wound on the tape reel. It is also possible to simplify the manufacturing process.
The tape reel may have a configuration wherein the groove has a width equal to or less than 1 mm and a depth equal to or less than 1 mm.
Thereby, when the magnetic tape is further shifted to the flange against the normal force applied from the flange, the width-direction edge of the magnetic tape, which is shifted onto the flange, is bent into the groove. Therefore, the magnetic tape further wound on the magnetic tape shifted onto the flange can be placed substantially parallel to the outer circumference surface of the hub without having any influence from the bent edge of the first wound magnetic tape.
The tape reel may have a configuration wherein the tape has a thickness equal to or less than 8.9 μm.
By this configuration, it is possible to prevent the tape from being shifted onto the flange, especially when the tape having the thickness equal to or less than 8.9 μm is used.
According to the present invention, it is possible to prevent the tape from being shifted onto the flange at the beginning of winding the tape on the tape reel. Furthermore, even when the tape is shifted onto the flange, the edge of the magnetic tape is bent into the groove and the magnetic tape further wound on the magnetic tape shifted onto the flange can be placed on the hub without any influence from the bent edge of the magnetic tape, thereby preventing the stripes on the tape wound on the tape reel. It is, therefore, possible to improve the production yield of the tape cartridge containing the tape reel according to the present invention.
The object and features of the present invention will become more readily apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
With reference to
A tape reel 1 of the first embodiment includes a reel member 5 and a disc-shaped upper flange 4. The reel member 5 includes a cylindrical hub 2 having the bottom and a disc-shaped lower flange 3, and the hub 2 and the lower flange 3 are integrally formed. The upper flange 4 has the same diameter as that of the lower flange 3. Ring-shaped grooves 2a1, 2a2 are formed on both ends of the outer circumference surface of the hub 2. The upper flange 4 has an opening portion in the center thereof, and a cylindrical portion 4a projects toward the hub 2 around the opening portion. The outer diameter of the cylindrical portion 4a is approximately equal to the inner diameter of the upper end of the hub 2, but the outer diameter of the cylindrical portion 4a is slightly smaller than the inner diameter of the upper end of the hub 2. The cylindrical portion 4a is fitted into an opening portion of the upper end of the hub 2 and is connected thereto so as to form the tape reel 1.
The grooves 2a1, 2a2 formed on the hub 2 have the width equal to or less than 1 mm and the depth equal to or less than 1 mm. In the case that the hub 2 has the width (space between the lower flange 3 and the upper flange 4) of 12.75 mm and a magnetic tape MT to be wound on the tape reel 1 has the width of ½ inch (12.65 mm) and the thickness of 6.6 μm, the widths of the grooves 2a1, 2a2 may range approximately from 0.05 mm to 1 mm and the depths of the grooves 2a1, 2a2 may range approximately from 0.05 mm to 1 mm.
With reference to
According to the first embodiment of the present invention, the hub 2 of the tape reel 1 includes the grooves 2a1, 2a2 formed on both ends of the outer circumference surface of the hub 2, specifically, on the contact points of the hub 2 and the lower flange 3 and of the hub 2 and the upper flange 4, respectively. As shown in
The above description has been given to explain the case where the magnetic tape MT is shifted to the lower flange 3, but the same explanation can be applied to the case where the magnetic tape MT is shifted to the upper flange 4. The provision of the grooves 2a1, 2a2 on the both ends of the hub 2 can prevent the magnetic tape MT from being shifted onto the lower flange 3 and the upper flange 4. Therefore, the magnetic tape MT further wound on the magnetic tape MT shifted onto the flange can be placed substantially parallel to the outer circumference surface of the hub 2 without any influence from the edge of the magnetic tape MT shifted on any one of the flanges 3, 4, thereby preventing the radial stripes on the magnetic tape MT wound on the tape reel 1.
As shown in
The widths and depths of the grooves 2a1, 2a2 can be appropriately determined according to the stiffness and thickness of the magnetic tape MT, and an assumed (allowed) shift amount of the magnetic tape MT.
As mentioned above, the edge MTa of the magnetic tape MT, which is shifted to the lower flange 3, crosses over the groove 2a1 and contacts the lower flange 3. In this instance, the magnetic tape MT need to have the stiffness enough to cross over the groove 2a1 and contacts the lower flange 3 without being bent, so that the edge MTa of the magnetic tape MT contacts the lower flange 3 at a substantially right angle. Therefore, the width of the groove 2a1 may be determined according to the stiffness of the magnetic tape MT to be used.
The groove 2a1 need to have the depth such that the edge MTa of the magnetic tape MT, which is shifted onto the lower flange 3, can be bent into and contained in the groove 2a1. Therefore, the depth of the groove 2a1 can be appropriately determined according to the thickness of the magnetic tape MT, and the assumed (allowed) shift amount of the magnetic tape MT, that is, the amount that the magnetic tape MT is shifted to the lower flange 3. The width and depth of the groove 2a2 may be determined in the same manner as the groove 2a1.
When the thickness of the magnetic tape MT is equal to or less than 8.9 μm, the stiffness of the magnetic tape MT extremely decreases, and as shown in
With reference to
The tape reel 1 of the first embodiment includes a reel member 5, in which the hub 2 and the lower flange 3 are integrally formed. As shown in
On the other hand, as shown in
Then, the cylindrical portion 4a of the upper flange 4 is fitted into the opening portion provided on the upper end of the hub 2 of the reel member 5, and is connected thereto by ultrasonic welding, adhesion, or the like, so as to form the tape reel 1.
In the above-described tape reel 1 of the first embodiment, the grooves 2a1, 2a2 are formed on the both ends of the hub 2 on the assumption that the magnetic tape MT can be shifted to both of the lower flange 3 and the upper flange 4. However, it is possible to provide the effect of the present invention by forming one of the grooves 2a1, 2a2 on one end of the hub 2. For example, when a whole tape is cut into the magnetic tape MT having a product length, the magnetic tape MT is provided with a curvature (for example, the curvature of approximately 1 mm/m) in the longitudinal direction of the magnetic tape MT. Thereby, the magnetic tape MT is likely to be shifted to the inner side of the curvature when the magnetic tape MT is wound around the hub 2, and therefore one of the grooves 2a1, 2a2 may be formed on one end of the hub 2, to which end the tape MT is likely to be shifted according to the curvature of the magnetic tape MT.
The hub 2 may have the groove 2a2 on the upper flange 4 side end when the magnetic tape MT is provided with the curvature to be shifted to the upper flange 4, and the groove 2a1 need not be formed on the lower flange 3 side end of the hub 2. Therefore, the reel member 5 shown in
With reference to
The tape reel 1 of the second embodiment is different from the tape reel 1 of the first embodiment in that the cylindrical hub 2 and the disc-shaped lower flange 3 are formed as one component, respectively, and therefore the tape reel 1 of the second embodiment comprises three members including the hub 2, the lower flange 3, and the upper flange 4.
The ring-shaped grooves 2a1, 2a2 are formed on both ends of the outer circumference surface of the hub 2. The disc-shaped lower flange 3 has an opening portion in the center thereof and a cylindrical portion 3a projects toward the hub 2 around the opening portion. The outer diameter of the cylindrical portion 3a is approximately equal to the inner diameter of the lower end of the hub 2, but the outer diameter of the cylindrical portion 3a is slightly smaller than the inner diameter of the lower end of the hub 2. The upper flange 4 is a ring-shaped member having the same diameter as that of the lower flange 3. The upper flange 4 has the opening portion in the center thereof and the cylindrical portion 4a projects downward around the opening portion. The outer diameter of the cylindrical portion 4a is approximately equal to the inner diameter of the upper end of the hub 2, but the outer diameter of the cylindrical portion 4a is slightly smaller than the inner diameter of the upper end of the hub 2.
The cylindrical portion 3a and the cylindrical portion 4a are fitted into the opening portions of the upper and lower ends of the hub 2, respectively, and are connected thereto so as to form the tape reel 1.
Because the tape reel 1 of the second embodiment, which is formed by connecting the above-mentioned three members, has the same configuration as the tape reel 1 of the first embodiment, a description on the configuration of the tape reel 1 of the second embodiment will be omitted.
Next, a description will be given on the method of manufacturing the tape reel 1 of the second embodiment.
The lower flange 3 and the upper flange 4 have the same configuration, and the both flanges can be formed by injection molding in the same manner as the upper flange 4 of the first embodiment.
The hub 2 of the second embodiment can be formed by injection molding without any additional process such as cutting, because the hub 2 has no portion that can not be formed by injection molding, like the groove 2a1 (see
The cylindrical portion 3a of the lower flange 3 and the cylindrical portion 4a of the upper flange 4 are fitted into the opening portions of the lower and upper ends of the hub 2, respectively. Then, the upper side of the lower flange 3 and the lower side of the upper flange 4 are connected to the lower and upper ends of the hub 2, respectively, by ultrasonic welding, adhesion, or the like, so as to form the tape reel 1.
Third EmbodimentNext, a description will be given on a tape cartridge according to the third embodiment of the present invention. The tape cartridge of the third embodiment is explained by using as an example a single-reel type magnetic tape cartridge that conforms to the so-called LTO (Linear Tape Open) standard. The magnetic tape cartridge of the third embodiment contains the tape reel according to the embodiment of the present invention.
With reference to
As shown in
As shown in
The hub 2 and the lower flange 3 are integrally formed in the same manner as the tape reel 1 of the first embodiment. The cylindrical portion 4a, which projects toward the hub 2 around the opening portion provided in the center of the upper flange 4, is fitted into the opening portion of the upper end of the hub 2. The ring-shaped grooves 2a1, 2a2 are formed on both ends of the outer circumference surface of the hub 2.
The lower portion in the center of the hub 2 is covered by a bottom wall 2b, and on the outer circumference portion of the lower side of the bottom wall 2b is formed a ring-shaped reel gear 2c that engages with a metallic driving gear 23 of the spindle 21 provided in the magnetic tape drive apparatus. A reel plate 12, which is a ring-shaped metallic plate and is dedicated to sticking to a magnet, and the reel gear 2c are arranged to face an opening portion 11d provided on the bottom surface of the lower half 11b.
Before the magnetic tape cartridge 10 is chucked on the spindle 21, a connecting projection 13a of the lock plate 13, which is biased downward by the compression coil sprig 14, and a locking groove 2d provided in the lower flange 3 are connected to each other so as to lock the tape reel 1 and prevent the rotation of the tape reel 1.
Next, a description will be given on an operation of the magnetic tape cartridge 10 when the tape cartridge 10 is chucked on the spindle 21 and is in an operational state.
As shown in
In order to chuck the magnetic tape cartridge 10 on the spindle 21, the magnetic tape cartridge 10, which is loaded on a bucket (not shown) in the magnetic tape drive apparatus, is moved downward to the rotary shaft 22. Then, the driving gear 23 engages with the reel gear 2c, and the magnet on the disc portion 25 sticks to the reel plate 12 so as to maintain the engagement. Thereby, the magnet tape cartridge 10 is in the operational state as shown in
When the tape cartridge 10 is in the operational state as shown in
With reference to
A description will be given on a configuration of the tape winder W.
The tape winder W shown in
As shown in
The tape supplying device 30 includes reels R1, R2, which have the magnetic tape MT wound therearound and have the pancake shape, and supplies the magnetic tape MT to the tape attaching device 80. In the tape supplying device 30, the reel R1 (or R2) is rotated by a reel driving unit (not shown) at a predetermined rotation speed so as to feed the magnetic tape MT to the tape attaching device 80. Because the tape supplying device 30 includes the reels R1 and R2, the reel R2 is substituted for the reel R1 when the reel R1 runs out of the magnetic tape MT, thereby continuously supplying the magnetic tape MT to the tape attaching device 80.
The tape attaching device 80 includes a case placing unit 81, on which the cartridge case 11 is placed, and a tape carrier 82 that carries the magnetic tape MT fed from the tape supplying device 30 into the cartridge case 11.
The case placing unit 81 is positioned in, for example, the approximately lower right portion of the panel P. The cartridge case 11 is placed in the case placing unit 81 such that the pull-out port 11c faces the lower left portion of the panel P.
In the case placing unit 81, the tape reel 1 in the cartridge case 11 is rotatably supported, and the magnetic tape MT is wound around the hub 2 by the reel driving unit (not shown).
As shown in
On the upper side of the tape carrier 82 are formed, from the end portion of the tape carrier 82 (the cartridge case 11 side), a sponge mounting portion 83, the first adsorbing portion (holding portion) 84, and the second adsorbing portion 85. A placing portion 86, on which a sponge (elastic member) 87 is placed, is formed between the first adsorbing portion 84 and the second adsorbing portion 85.
The sponge mounting portion 83 is formed into a rectangular shape, and a sponge (first sponge) 88 is disposed on the sponge mounting portion 83. The sponge mounting portion 83 is supplied with alcohol (liquid) such as methanol, ethanol, or IPA (isopropanol), which is used to attach the magnetic tape MT on the hub 2, and therefore the sponge 88 is always soaked with an appropriate amount of the alcohol.
The first adsorbing portion 84 has a plurality of holes H1. The holes H1 are converged to one passage provided inside the tape carrier 82, and a vacuum pump and a compressor are connected to the passage through a hose, a changeover valve, or the like. When carrying the magnetic tape MT, the first adsorbing portion 84 adsorbs the magnetic tape MT in vacuum through the holes H1 connected to the vacuum pump via the passage. When the compressor is connected to the passage by switching the changeover valve, the first adsorbing portion 84 blows the magnetic tape MT through the holes H1 so as to attach the magnetic tape MT on the hub 2.
Similarly, the second adsorbing portion 85 has a plurality of holes H2. The holes H2 are converged to one passage provided inside the tape carrier 82, and a vacuum pump is connected to the passage through a hose, a solenoid valve, or the like. When carrying the magnetic tape MT, the second adsorbing portion 85 adsorbs the magnetic tape MT in vacuum through the holes H2 connected to the vacuum pump via the passage.
The placing portion 86 is formed into a groove shape and includes a placing surface 86a and chamfered surfaces 86b, 86b, which lead from the placing surface 86a to the first adsorbing portion 84 and the second adsorbing portion 85, respectively. Preferably, the width A of the placing surface 86a is equal to or less than 11 mm, the length B is equal to or more than 19 mm, and the depth C is equal to or more than 0.5 mm. The width A is equal to or less than the width of the magnetic tape MT (½ inch, i.e., 12.65 mm), so that it is possible to prevent the placing portion 86 from interfering with the flanges 3, 4 of the tape reel 1 in the cartridge case 11 as shown in
A sponge 87 is fixed on the placing surface 86a of the placing portion 86 by springs V. The sponge 87 may be fixed by various fastening devices, such as a two-side tape or adhesive agent.
The sponge 87 presses the magnetic tape MT on the hub 2 when the tape carrier 82 is moved upward to the hub 2. The magnetic tape MT is pressed on the hub 2 by the sponge 87 so that the alcohol applied on the hub 2 by the sponge 88 is applied on the magnetic tape MT and the magnetic tape MT is pressed on the hub 2 along the form of the hub 2.
The tape carrier 82 only includes the holes H1, H2, through which the magnetic tape MT is adsorbed in vacuum, and the passages connected to the holes H1, H2, so that it is possible to reduce the thickness of the tape carrier 82 and reduce the size of the tape carrier 82 according to the size of the pull-out port 11c of the cartridge case 11.
With reference to
In the tape winder W as shown in
In the tape attaching device 80, the tape carrier 82 holds the end portion MT1 of the magnetic tape MT fed from the tape supplying device 30, and attaches the end portion MT1 on the hub 2 of the tape reel 1 in the cartridge case 11, which is placed in the case placing unit 81.
With reference to
As shown in
As shown in
Then, as shown in
The grooves 2a1, 2a2 are formed on the both ends of the outer circumference surface of the hub 2 of the tape reel 1, so that it is possible to prevent the magnetic tape MT from being shifted onto the lower and upper flanges 3, 4 (see
After the end portion MT1 of the magnetic tape MT is attached on the hub 2, the tape reel 1 is rapidly rotated by the reel driving unit (not shown) provided in the case placing unit 81, and thereby a predetermined amount of the magnetic tape MT is wound on the tape reel 1. In the operation of winding the magnetic tape MT on the tape reel 1, the tape reel 1 does not rotate at a constant rotation speed. A rotation speed gradually increases from the beginning of the winding of the magnetic tape MT, and when the rotation speed reaches a predetermined speed, the tape reel 1 keeps the rotation speed for a certain period of time. Based on an expected termination time of winding the magnetic tape MT, the rotation speed gradually decreases, and the rotation stops when the winding is completed.
After the predetermined amount of the magnetic tape MT is wound on the tape reel 1, the magnetic tape MT is cut off by a cutoff device (not shown). Then, the leader tape L (see
According to the above-mentioned manufacturing method, the magnetic tape cartridge 10 can be provided, by which it is possible to prevent the stripe on the magnetic tape wound on the tape reel 1 and then improve production yield.
According to the first and second embodiments of the present invention, the tape reels 1 are formed of the two members and the three members, respectively, but any one of the tape reels 1 may be configured in combination with other functional members. The manufacturing method is not limited to the above-mentioned method. The material, of which the tape reel 1 is made, is not limited to resin, and may be metal or the combination of resin and metal.
According to the third embodiment of the present invention, the magnetic tape cartridge 10 is a single reel type magnetic tape cartridge, but the present invention may be applied to a double reel type magnetic tape cartridge, in which the tape cartridge configured according to the present invention is used. The tape to be wound on the tape reel is not limited to the magnetic tape, and the present invention may be applied to tapes for other applications.
Claims
1. A tape reel comprising:
- a cylindrical hub having a tape wound therearound; and
- a first flange and a second flange respectively provided on both ends of the hub,
- wherein the hub includes a ring-shaped groove on at least one of both end portions of an outer circumference surface of the hub.
2. The tape reel according to claim 1,
- wherein the groove has a width equal to or less than 1 mm and a depth equal to or less than 1 mm.
3. The tape reel according to claim 1,
- wherein the tape has a thickness equal to or less than 8.9 μm.
4. The tape reel according to claim 2,
- wherein the tape has a thickness equal to or less than 8.9 μm.
5. A tape cartridge comprising:
- the tape reel according to claim 1;
- a tape wound around the outer circumference surface of the hub of the tape reel; and
- a cartridge case rotatably containing the tape reel.
6. The tape cartridge according to claim 5,
- wherein the tape is provided with a curvature in a longitudinal direction of the tape, and the hub includes the groove on one of the both end portions of the outer circumference surface of the hub at an inner side of the curvature.
7. The tape cartridge according to claim 5,
- wherein the groove has a width equal to or less than 1 mm and a depth equal to or less than 1 mm.
8. The tape cartridge according to claim 5,
- wherein the tape has a thickness equal to or less than 8.9 μm.
9. A method of manufacturing a tape reel including a cylindrical hub having a tape wound therearound and first and second flanges respectively provided on both ends of the hub, the method comprising the steps of:
- integrally forming the hub and the first flange by injection molding;
- forming the second flange by injection molding;
- forming a first ring-shaped groove on a contact point of the hub and the first flange; and
- assembling the hub, the first flange, and the second flange.
10. The method of manufacturing the tape reel according to claim 9, further comprising the step of forming a ring-shaped second groove on the end portion of the outer circumference surface of the hub on an opposite side to the first groove when the hub and the first flange are integrally formed by injection molding.
11. A method of manufacturing a tape reel including a cylindrical hub having a tape wound therearound and first and second flanges respectively provided on both ends of the hub, the method comprising the steps of:
- forming the hub having a ring-shaped groove on at least one of both end portions of an outer circumference surface of the hub by injection molding;
- forming a first flange by injection molding;
- forming a second flange by injection molding; and
- assembling the hub, the first flange, and the second flange.
12. The method of manufacturing the tape reel according to claim 11, further comprising the step of forming ring-shaped grooves on the both end portions of the outer circumference surface of the hub.
Type: Application
Filed: Apr 27, 2007
Publication Date: Nov 1, 2007
Applicant: FUJIFILM Corporation (Minato-ku)
Inventor: Keiichi Tsutsui (Odawara-shi)
Application Number: 11/790,774
International Classification: B65H 75/08 (20060101);