GB1598833A - Reel for magnetic recording tape - Google Patents
Reel for magnetic recording tape Download PDFInfo
- Publication number
- GB1598833A GB1598833A GB5436977A GB5436977A GB1598833A GB 1598833 A GB1598833 A GB 1598833A GB 5436977 A GB5436977 A GB 5436977A GB 5436977 A GB5436977 A GB 5436977A GB 1598833 A GB1598833 A GB 1598833A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hub
- flange
- ribs
- rings
- reel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 description 9
- 239000004033 plastic Substances 0.000 description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000638 styrene acrylonitrile Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/037—Single reels or spools
Landscapes
- Storage Of Web-Like Or Filamentary Materials (AREA)
Description
(54) REEL FOR MAGNETIC RECORDING TAPE
(71) We, MEMOREX CORPORA
TION, a corporation organised and existing under the laws of the State of California, of
San Tomas at Central Expressway Santa
Clara, California 95052 United States of
America, do hereby declare that the invention for which we pray that a patent may be granted to us and the method by which it is to be performed to be particularly described in and by the following statement:
This invention relates to a tape reel, and particularly to a reel for storing magnetic tape such as is used with computers.
Magnetic tape reels in the prior art have generally comprised either a metallic hub with spaced flanges of metal or plastics attached thereto, or an all-plastics reel having both a plastics hub and plastics flanges attached thereto.
Prior art metallic reels have suffered several disadvantages, the principal one being the high cost of manufacture, both in the material and labour costs. Additionally, the metal hubs, such as used on the reel of
Perlini United States Patent Specification
No. 3,088,689, have a substantially different coefficient of thermal expansion from that of the tape and may cause stretching of the tape if the tape and reel are exposed to low temperatures.
Such high costs of manufacture have been overcome to a large extent by the use of synthetic resins or plastics for both the reel hub and its flanges. However, most of the prior art plastics reels have suffered numerous problems of their own. The primary problem of plastics reels has related to the inability of the plastics hub to withstand the compressive forces imparted to the hub by the wound tape. Particularly, the problem has come from the inability of the rim upon which the tape is wound to withstand these compressive forces. One new type of reel attempting to solve this problem is the subject of a patent application on a reel for magnetic recording tape, U.S. Serial No.
728,503. However, it is believed that even the reel of that prior application may experience some difficulties in the manufacturing process.
In view of the problems of the prior art reels it is an aim of this invention to provide a tape reel which resists compressive deformation of the surface upon which the tape is wound. Particularly, it is an aim of this invention to provide such a reel in which the flange structure provides additional support against such compressive deformation of the tape supporting surface.
According the present invention provides a reel for magnetic recording tape, comprising,
a hub including axially extending coaxial inner and outer rims joined by a radially extending web, and a coaxial ring intermediate the rims on each side of the web extending axially outward of said web, each rim and each ring having radially inward and radially outward portions,
a pair of opposed flanges attached to and extending radially outward of the hub with the first flange received on a first axial side of the hub and the second flange received on the second, opposed axial side of the hub, each flange having a pair of coaxial rings extending axially inward of the reel with the radially outer flange ring on each flange being received against the corresponding radially inward portion of the outer rim, and the radially inner flange ring on each flange being received against the radially outward portion of the corresponding intermediate ring, whereby the flanges and their flange rings may serve both to support the hub outer rim against radially inward deflection and also to carry a portion of any radially inward deforming forces on the hub outer rim to the hub intermediate rings for support.
In a preferred embodiment the reel of this invention is formed entirely of a rigid synthetic resin, or plastics.
The invention will now be described, by way of example, with reference to the accompanying Drawings, in which:
Figure 1 is a perspective view, partially in section, of the reel of this invention, illustrating the side of the reel which will be facing outward when the reel is mounted on a tape drive;
Figure 2 is a fragmentary perspective view, partially in section, of the reel of
Figure 1, illustrating the opposite, inward facing side thereof;
Figure 3A is a fragmentary, exploded sectional view of a portion of the hub and one flange of the reel of this invention;
Figure 3B is a fragmentary sectional view of a portion of the assembled hub and flanges of the reel of this invention;
Figure 4 is an exploded view of a fragment of the reel of this invention, viewed from the outward facing side thereof;
Figure 5 is an exploded view of the same reel fragment as Figure 4, illustrating the inward facing side thereof;
Figure 6 is a fragmentary sectional view of the reel of this invention, taken along line 6-6 of Figure 3.
Figure 7 is an exploded view of the fragment of an alternative embodiment of the reel of this invention, viewed from the outward facing side thereof;
Figure 8 is an exploded view of the reel fragment of Figure 7, illustrating the inward facing side thereof; and
Figure 9 is a fragmentary sectional view of an alternative embodiment of the reel of this invention, taken in a manner similar to that of the section of Figure 6.
Two particularly preferred embodiments of the reel of this invention are illustrated in the Drawings, with the embodiment of
Figures 7 to 9 representing only a minor variation on that of Figures 4 to 6. The embodiment of Figures 4 to 6 will be used for the initial detailed description, with the variations incorporated in Figures 7 to 9 described subsequently; Figures 1, 2, 3A and 3B apply equally to both embodiments.
The reel of this invention comprises three basic components, hub 2, a front or first flange 4 and a rear or second flange 6.
Suitably, both flanges 4 and 6 may be moulded of a synthetic resin, such as styrene. For additional strength, it is desirable that the hub 2 be moulded of a higher strength material than the flanges, suitably a filled synthetic resin such as glass-filled styrene or glass-filled styrene-acrylonitrile, commonly referred to as SAN. This higher strength hub material assists in resisting the radically inward forces exerted by tape wound upon the hub.
The manner of construction and the detailed configuration of the reel components are illustrated in the enlarged sectional view of Figure 3B. In this view, it may be seen that the hub 2 comprises a coaxial inner rim 8, which may engage a tape drive spindle, and a coaxial outer rim 10, upon which the tape is wound, joined together by a web 12 which extends radially between the two rims. Projecting axially from opposite sides of the web 12 are first side intermediate ring 14 and second side ring 16, which are intermediate the rims 8 and 10 and are coaxial with the rims 8 and 10 and thus with the reel itself. Extending radially between outer rim 10 and intermediate rings 14 and 16 are a plurality of hub outer ribs 18 and 20, also illustrated in Figures 4 to 6. By the use of this ribbed construction instead of heavy solid sections for the hub, the outer rim section 10 of the hub may be kept thin enough in section to avoid any sinking or distortion problems normally encountered with thick sections. Further to avoid thick sections, it may be noted in Figures 4 and 5 that the ribs 18 and 20 are angularly positioned in a staggered arrangement, the hub intermediate rings 14 and 16 are radially offset from one another, so that no thick sections of the hub other than rims 8 and 10 directly oppose one another. On the first side (the front or outside of the reel when mounted on a tape drive) it may be noted that the hub outer ribs 18 are aligned with hub inner ribs 22 which extend radially between the intermediate ring 14 and the inner rim 8. Additionally, on the first side of the hub a plurality of auxiliary inner ribs 24 also extend radially between the first side intermediate ring 14 and the inner rim 8.
These auxiliary inner ribs 24 are positioned such that one such rib 24 is located between each adjacent pair of hub inner ribs 22. By this ribbed construction radially compressive forces acting upon outer rim 10 may be transmitted directly to the intermediate rings 14 and 16 for support. and any such loads on first side intermediate ring 14 mav be transmitted directly to the inner rim 8 for additional support. Due to the industry standard requirement that a recording lockout groove be provided on the side of the reel facing the tape drive, no inner hub ribs corresponding to first side inner ribs 22 and 24 extend between second side intermediate ring 16 and the inner rim 8.
The opposed flanges 4 and 6 are best illustrated with reference to Figures 3A to 5.
These flanges are generally annular. disclike members attached to the hub 2. Each flange has a pair of coaxial rings extending axially inward of the reel. On the front, or first, flange 4 the radially outer and inner such rings are denoted respectively by reference numbers 26 and 28; on rear, or second, flange 6 the corresponding rings are denoted by reference numbers 30 and 32. First side flange rings 26 and 28 are received between the outer rim 10 and the intermediate ring 14. As illustrated in Figures 1 to 3B, the first side outer flange ring 26 engages the radially inward portion of the hub outer rim 10 and the first side inner flange ring engages the radially outward portion of intermediate ring 14, as will be described below with respect to the assembly of the reel. Also, the flange rings 26 and 28 are both slotted to straddle the first side outer hub ribs 18, in a manner illustrated in Figure 6. In a similar manner, the second side outer flange ring 30 engages the second side radially inward portion of the hub outer rim 10, and the second side inner flange ring 32 engages the radially outward portion of the intermediate ring 16. The second side flange rings 30 and 32 likewise are slotted to straddle the second side hub outer ribs 20. In this first preferred embodiment alternate slots in the respective flange rings are only slightly wider than the thickness of the hub outer ribs 18 and 20 which they straddle, such that the close spacing between the slot surfaces and the respective straddled ribs may serve to position the flanges angularly with respect to the hub. Conversely, the alternate slots intermediate those which are closely spaced from the straddled hub rib are made substantially wider than the straddled hub outer ribs, as illustrated in Figure 6. These alternate wider slots thus provide substantially no restraint upon the angular positioning of the flanges with respect to the hub and assist in avoiding interference between the flange slots and the hub ribs, such as might occur due to tolerance build-up in the molding process. It may be noted from the drawing that the adjacent flange ribs 34 and 36 between each pair of circumferentially adjacent hub outer ribs are spaced circumferentially closer together than the adjacent pairs of hub outer ribs so that the adjacent pairs of flange ribs are circumferentially spaced from their respectively adjacent hub outer ribs.
To strengthen the flange rings against deflection or deformation by any radial force acting thereupon, the first flange is provided with a plurality of flange ribs 34 extending radially between the first side outer flange ring 26 and first side inner flange ring 28. Similarly, the second flange 6 is provided with a plurality of flange ribs 36 extending radially between flange rings 30 and 32. By the provision of these radially extending ribs 34 and 36 any radially deforming forces exerted upon the outer flange rings 26 and 30 may be transmitted directly to the respective inner flange rings 28 and 32, and then borne by the engagement of those inner flange rings- with the respective hub intermediate rings 14 and 16.
Thus, this flange ring and rib structure provides substantial additional support for hub outer rim 10 against the radially compressive forces exerted by tape wound thereupon. While any convenient number of flange ribs 34 and 36 may be provided, it is preferred to have at least one and preferably two between each pair of hub rib straddling slots, as illustrated in Figures 4-6 and as defined by the hub ribs. By providing two such flange ribs 34 and 36 between each pair of hub rib straddling slots, the combination of the two flange ribs and the portions of the inner and outer flange rings which they engage (and with which they preferably are moulded) form a box section for transfer of any radially compressive loads between the inner and outer flange rings, so that both such flange rings may serve to support one another.
To provide additional support for the hub outer rim 10 against radial deflection, the respective flanges 4 and 6 are each provided with a circular groove, 38 and 40, respectively. These grooves 38 and 40 are approximately the same width as the thickness of outer rim 10 and are located on the axially inner surface of the flange immediately radially outward of the respective outer flange rings 26 and 30. As illustrated in
Figure 3B, the axially outer edge of hub outer rim 10 is received into these grooves 38 and 40 when the flanges 4 and 6 are assembled onto the hub.
While any suitable method, such as adhesive bonding or staking, may be used for attaching the flanges 4 and 6 to the hub 2, it is preferred to attach the flanges to the hub by means of ultrasonic weldments. It is further preferable that these weldments comprise the areas of contact of the flanges 4 and 6 with the respective axial extremities of the hub outer ribs 18 and 20, and also those areas of engagement between the axially innermost portions of the flange rings 26, 28, 30, and 32 with the hub, as illustrated in Figure 3B. To provide for the weldments between the first flange rings 26 and 28 and the hub, annular ultrasonic energy concentrators 42 and 44 are provided respectively on the radially inward portion of hub outer rim 10 and the radially outward portion of hub intermediate ring 14, both adjacent the radially extending web 12.
Similarly, to provide for the weldments between the second flange rings 30 and 32 and the hub, annular ultrasonic energy concentrators 46 and 48 are provided on the hub second side, extending respectively from the radially inward portion of hub outer rim 10 and the radially outward portion of hub intermediate ring 16, both energy concentrators also being adjacent the hub web 12. Prior to assembly and such ultrasonic welding, the axially innermost portions of the flange rings 26, 28, 30, and 32 are generally squared off, as indicated in
Figure 3A. However, during the ultrasonic welding process these squared off portions are melted slightly to form a bond between the flange rings 26, 28, 30, and 32 and the corresponding energy concentrators 42, 44, 46, and 48, as illustrated in Figure 3B. also during the welding process, as the flanges 4 and 6 are pressed inwardly into engagement with the hub 2, the axially outermost portions of hub outer ribs 18 and 20 come into engagement with portions of the axially entered surfaces 50 and 52 of the flanges 4 and 6. To provide a still stronger bond between the hub 2 and the flanges 4 and 6, the flanges continue to be urged inwardly during the application of ultrasonic energy to the assembly even after the axially outermost portions of the ribs 18 and 20 contact the inner surface 50 of the flanges.
Thus, these radially extending hub outer ribs 18 and 20 are forced into the flanges 4 and 6, respectively, to form additional radially extending weldments between the hub and the flanges. The welding process, with the flanges being urged axially inwardly, is terminated when the flanges 4 and 6 are spaced predetermined distances from the axial center of the hub. Preferably the circular flange slots 38 and 40 are dimensioned to provide a slight clearance for reception of hub outer rim 10 without the development of undesirable stresses.
From the above described manner of construction and assembly it may be seen that, upon assembly and welding of the flanges 4 and 6 to the hub 2, the engagement of the hub outer rim 10 with the slots 38 and 40 of the flange and the engagement between the flange rings 26, 28, 30, and 32 with the hub rim 10 and intermediate rings 14 and 16, provide the hub, and particularly the outer rim 10, with additional support against compressive deformation. By virtue of this construction any radially compressive deformation of the hub outer rim 10 would require a corresponding deformation of the immediately adjacent flange rings 26 and 30.
These flange rings 28 and 30 are supported against radially compressive deformation by the flange ribs 34 and 36 which transfer the load to inner flange rings 28 and 32 and thence to hub intermediate rings 14 and 16.
Thus, any radially compressive load exerted on the hub outer rim 10 is directly distributed to the flanges and flange rings and also to the hub intermediate rings for support.
The alternative preferred embodiment of this invention is illustrated in Figures 7 to 9 and is substantially similar to that of the embodiment described above. In view of this similarity, like elements on this second embodiment are provided with designation numbers corresponding to those of the first embodiment but increased by 100, i.e., hub 102 on the second embodiment corresponds to hub 2 of the first. The principal difference between this second embodiment and the first is that all of the flange ring slots for straddling the hub outer ribs 118 are formed of generally equal width, each such slot being only slightly wider than the thickness of the hub rib is straddles. Thus, with this embodiment there is generally equal space between each of the hub ribs 118 and the edges of the hub ring slots. While this second embodiment provides for potentially closer alignment between the flanges and the hub, it also suffers the disadvantage that a build-up of tolerances can result in an interference between some of the hub ribs 118 and their corresponding straddling flange ring slots, thus potentially making assembly slightly less convenient.
While the foregoing describes two particularly preferred embodiments of the reel of this invention, it is to be recognized that numerous other embodiments employing the principles of this invention will readily become apparent to those skilled in the art.
WHAT WE CLAIM IS:
1. A reel for magnetic recording tape, comprising
a hub including axially extending coaxial inner and outer rims joined by a radially extending web, and a coaxial ring intermediate the rims on each side of the web extending axially outward of said web, each rim and each ring having radially inward and radially outward portions,
a pair of opposed flanges attached to and extending radially outward of the hub with the first flange received on a first axial side of the hub and the second flange received on the second, opposed axial side of the hub, each flange having a pair of coaxial rings extending axially inward of the reel with the radially outer flange ring on each flange being received against the corresponding radially inward portion of the outer rim, and the radially inner flange ring on each flange being received against the radially outward portion of the corresponding intermediate ring, whereby the flanges and their flange rings may serve both to support the hub outer rim against radially inward deflection and also to carry a portion of any radially inward deforming forces on the hub outer rim to the hub intermediate rings for support.
2. A reel as claimed in claim 1, wherein the hub and both flanges are formed of a synthetic resin.
3. A reel as claimed in claim 1 or 2, wherein the flanges are attached to the hub by weldments.
4. A reel as claimed in claim 3, wherein the weldments are located at least between the hub outer rim and the flange outer rings
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (14)
- **WARNING** start of CLMS field may overlap end of DESC **.32 are generally squared off, as indicated in Figure 3A. However, during the ultrasonic welding process these squared off portions are melted slightly to form a bond between the flange rings 26, 28, 30, and 32 and the corresponding energy concentrators 42, 44, 46, and 48, as illustrated in Figure 3B. also during the welding process, as the flanges 4 and 6 are pressed inwardly into engagement with the hub 2, the axially outermost portions of hub outer ribs 18 and 20 come into engagement with portions of the axially entered surfaces 50 and 52 of the flanges 4 and 6. To provide a still stronger bond between the hub 2 and the flanges 4 and 6, the flanges continue to be urged inwardly during the application of ultrasonic energy to the assembly even after the axially outermost portions of the ribs 18 and 20 contact the inner surface 50 of the flanges.Thus, these radially extending hub outer ribs 18 and 20 are forced into the flanges 4 and 6, respectively, to form additional radially extending weldments between the hub and the flanges. The welding process, with the flanges being urged axially inwardly, is terminated when the flanges 4 and 6 are spaced predetermined distances from the axial center of the hub. Preferably the circular flange slots 38 and 40 are dimensioned to provide a slight clearance for reception of hub outer rim 10 without the development of undesirable stresses.From the above described manner of construction and assembly it may be seen that, upon assembly and welding of the flanges 4 and 6 to the hub 2, the engagement of the hub outer rim 10 with the slots 38 and 40 of the flange and the engagement between the flange rings 26, 28, 30, and 32 with the hub rim 10 and intermediate rings 14 and 16, provide the hub, and particularly the outer rim 10, with additional support against compressive deformation. By virtue of this construction any radially compressive deformation of the hub outer rim 10 would require a corresponding deformation of the immediately adjacent flange rings 26 and 30.These flange rings 28 and 30 are supported against radially compressive deformation by the flange ribs 34 and 36 which transfer the load to inner flange rings 28 and 32 and thence to hub intermediate rings 14 and 16.Thus, any radially compressive load exerted on the hub outer rim 10 is directly distributed to the flanges and flange rings and also to the hub intermediate rings for support.The alternative preferred embodiment of this invention is illustrated in Figures 7 to 9 and is substantially similar to that of the embodiment described above. In view of this similarity, like elements on this second embodiment are provided with designation numbers corresponding to those of the first embodiment but increased by 100, i.e., hub 102 on the second embodiment corresponds to hub 2 of the first. The principal difference between this second embodiment and the first is that all of the flange ring slots for straddling the hub outer ribs 118 are formed of generally equal width, each such slot being only slightly wider than the thickness of the hub rib is straddles. Thus, with this embodiment there is generally equal space between each of the hub ribs 118 and the edges of the hub ring slots. While this second embodiment provides for potentially closer alignment between the flanges and the hub, it also suffers the disadvantage that a build-up of tolerances can result in an interference between some of the hub ribs 118 and their corresponding straddling flange ring slots, thus potentially making assembly slightly less convenient.While the foregoing describes two particularly preferred embodiments of the reel of this invention, it is to be recognized that numerous other embodiments employing the principles of this invention will readily become apparent to those skilled in the art.WHAT WE CLAIM IS: 1. A reel for magnetic recording tape, comprising a hub including axially extending coaxial inner and outer rims joined by a radially extending web, and a coaxial ring intermediate the rims on each side of the web extending axially outward of said web, each rim and each ring having radially inward and radially outward portions, a pair of opposed flanges attached to and extending radially outward of the hub with the first flange received on a first axial side of the hub and the second flange received on the second, opposed axial side of the hub, each flange having a pair of coaxial rings extending axially inward of the reel with the radially outer flange ring on each flange being received against the corresponding radially inward portion of the outer rim, and the radially inner flange ring on each flange being received against the radially outward portion of the corresponding intermediate ring, whereby the flanges and their flange rings may serve both to support the hub outer rim against radially inward deflection and also to carry a portion of any radially inward deforming forces on the hub outer rim to the hub intermediate rings for support.
- 2. A reel as claimed in claim 1, wherein the hub and both flanges are formed of a synthetic resin.
- 3. A reel as claimed in claim 1 or 2, wherein the flanges are attached to the hub by weldments.
- 4. A reel as claimed in claim 3, wherein the weldments are located at least between the hub outer rim and the flange outer ringsand between the hub intermediate rings and the flange inner rings.
- 5. A reel as claimed in any of claims 1 to 4, further comprising a plurality of hub outer ribs extending radially between the hub outer rim and the hub intermediate rings on both sides of the hub, whereby the hub outer ribs may serve to carry a portion of any radially deforming forces on the hub outer rim to the hub intermediate rings for support.
- 6. A reel as claimed in claim 5, further comprising a plurality of flange ribs extending radially between the inner flange ring and the outer flange ring on each flange, whereby a portion of any radially deforming force acting on one of the flange rings may be carried by the ribs to the other flange ring joined thereto.
- 7. A reel as claimed in claim 6, wherein both the outer flange ring and the inner flange ring on each flange are provided with slots dimensioned and located to straddle the hub outer ribs, and wherein at least one flange rib is located between circumferentially adjacent pairs of said flange ring slots, whereby the flange ribs may serve to transfer at least a portion of any radially compressive loads from the flange outer ring to the flange inner ring for support.
- 8. A reel as claimed in claim 6, wherein at least two flange ribs are provided between circumferentially adjacent pairs of the flange ring slots, whereby adjacent pairs of flange ribs and the portions of the inner and outer flange rings extending between them may form box sections to strengthen the flange rings against radial deformation.
- 9. A reel as claimed in claim 8, wherein each flange is attached to the hub by bonding its respective outer flange ring to the radially inner portion of the hub outer rim and bonding the flange inner ring to the corresponding intermediate ring radially outward portion, whereby the combination of the bonds, flange rings and flange ribs serves to form box sections to strengthen the hub against radially compressive deformation.
- 10. A reel as claimed in claim 8, wherein adjacent flange ribs located between circumferentially adjacent hub outer ribs are spaced circumferentially closer together than adjacent pairs of hub outer ribs such that the adjacent pairs of flange ribs are circumferentially spaced from their respectively adjacent hub outer ribs.
- 11. A reel as claimed in claim 8, wherein at least circumferentially alternate flange slots are formed substantially wider than the straddled hub outer ribs, whereby the edges of the wider alternate slots are spaced from the sides of the hub outer ribs which they straddle.
- 12. A reel as claimed in claim 7, wherein each hub outer rib is substantially equal in width and each flange ring slot is substantially equal in width, whereby the clearance between the edges of each slot and its respectively straddled hub outer rib is generally equal to that for every other flange ring slot and its respectively straddled hub outer rib.
- 13. A reel as claimed in claim 5, wherein the flanges are attached to the hub by weldments between (a) the hub outer rim and the flange outer rings, (b) the hub intermediate rings and the flange inner rings and (c) the hub outer ribs and portions of the respectively adjacent flanges.
- 14. A reel for magnetic recording tape substantially as herein described and with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5436977A GB1598833A (en) | 1977-12-30 | 1977-12-30 | Reel for magnetic recording tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5436977A GB1598833A (en) | 1977-12-30 | 1977-12-30 | Reel for magnetic recording tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1598833A true GB1598833A (en) | 1981-09-23 |
Family
ID=10470783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5436977A Expired GB1598833A (en) | 1977-12-30 | 1977-12-30 | Reel for magnetic recording tape |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1598833A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135653A (en) * | 1983-03-03 | 1984-09-05 | Data Packaging Corp | Computer tape reel |
| FR2542906A1 (en) * | 1983-03-16 | 1984-09-21 | Data Packaging Corp | Reel hub for computer magnetic tape |
-
1977
- 1977-12-30 GB GB5436977A patent/GB1598833A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135653A (en) * | 1983-03-03 | 1984-09-05 | Data Packaging Corp | Computer tape reel |
| FR2542906A1 (en) * | 1983-03-16 | 1984-09-21 | Data Packaging Corp | Reel hub for computer magnetic tape |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |