GB2116145A - Tape cassette with anti-friction members - Google Patents
Tape cassette with anti-friction members Download PDFInfo
- Publication number
- GB2116145A GB2116145A GB08205778A GB8205778A GB2116145A GB 2116145 A GB2116145 A GB 2116145A GB 08205778 A GB08205778 A GB 08205778A GB 8205778 A GB8205778 A GB 8205778A GB 2116145 A GB2116145 A GB 2116145A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tape
- members
- cassette
- discs
- tape cassette
- 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.)
- Granted
Links
- 239000002245 particle Substances 0.000 abstract description 3
- 239000004809 Teflon Substances 0.000 abstract description 2
- 229920006362 Teflon® Polymers 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 241001474374 Blennius Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 231100000989 no adverse effect Toxicity 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
- G11B23/04—Magazines; Cassettes for webs or filaments
- G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
- G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
Landscapes
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
Abstract
A tape cassette has anti-friction members for the tape edges provided by disc-shaped members (3). The members (3) are mounted for rotation on the reel hubs (4) on both sides of the tape, thereby inhibiting increase of take-up torque which could lead to stopping and breaking of the tape and adverse effects upon the speed of the tape or wow flutter. The members (3) can rotate with the wound tape body, and the surfaces of the members have bad Teflon (registered trade mark) particles applied under beat and pressure. The external diameter of the discs is slightly less than that of the fully wound tape body. <IMAGE>
Description
SPECIFICATION
Tape cassette with anti-friction members
The present invention relates to improvements in cartridge type tape cassettes.
In a conventional cassette, as shown in Fig.
2 of the accompanying drawings, thin sheets 2 of tetrafluorethylene film or the like are mounted on each cassette half 1 so that the latter does not itself directly contact a reel hub 4 and/or a wound tape body. However, when the sheet 2 is, as shown, of rectangular form and almost the same size as the conventional cassette half 1, the tape after a time becomes undesirably stretched at its edges. As a result the sound reproduction is very adversely affected and the frictional force between the edges of the tape and the sheets 2 increases during the rotation of the tape resulting in increasing take-up torque which can reach the stage where the tape cannot be rotated or has a very uneven rotation Moreover, after a long period of use, not only the tape, but also the surface of the sheets becomes roughened, resulting in an increasing frictional force.
An object of the present invention is to provide a tape cartridge type cassette which overcomes the above described drawbacks of the conventional ones.
According to the present invention, there is provided a cartridge type cassette characterised in that members providing engagement surfaces for the edges of the tape within the cassette are rotatably mounted on the reel hubs on both sides of the tape.
The invention will now be described by way of example with reference to the accompanying drawings, in which:~
Figure 1 shows an external view of a cassette tape,
Figure 2 is an opened-out view of the conventional cassette casing previously mentioned.
Figure 3 is a view of a member used in a cassette according to the present invention, and
Figure 4 is an opened-out view of a cassette in accordance with the present invention used in a cassette tape.
Referring to Figs. 1 and 2 of the drawings, cassette halves 1 of a conventional cassette are covered with sheets 2 of tetrafluoroethylene film. In contrast the cassette shown in
Fig. 4 has annular discs 3 to whose surfaces
Teflon (Registered Trade Mark) particles have been applied under heat and pressure. The external diameter of the discs 3 is preferably about 38 mm in the case where the cassette has a 41.5 mm spacing between the reel hubs. It is satisfactory to use Telfon particles of a size about 1y.
As shown in Fig. 4, the discs 3 are mounted on the respective reel hubs 4 on the right and left sides within each cassette half 1. When the take-up of the tape is started, the discs 3 rotate within the cassette halves in company with the rotation of the tape, al- though the wound tape body, when fully wound up is slightly larger than the discs 3 and is determined by the desired recording time. As the diameter of the wound-tape body on the draw-off side decreases, the diameter of the woundtape body on the take-up side increases, so that the discs 3 on the take-up side rotate together with the wound-tape body. Thus, even in cases that the side edges of the tape extend in a seaweed shape with long periods of use resulting in increasing frictional force between the side edges of the tape and the discs 3, and that the surface of the discs 3 become coarse which renders the slidability of the tape insufficient, there is no risk that the take-up torque of the tape increases to a level to stop the tape and to break it, because of the fact that the discs 3, 3 themselves rotate together with the reel hubs 4. Furthermore, since the tape can be smoothly rotated at all times, there is no adverse effect upon the speed of the tape and/or wow flutter.
Claims (4)
1. A cartridge type tape cassette characterised in that members providing engagement surfaces for the edges of the tape within the cassette are rotatably mounted on the reel hubs on both sides of the tape.
2. A cassette according to Claim 1, characterised in that said members are of disc form.
3. A cassette according to Claim 2, wherein said members have a diameter substantially the same size as the fully wound-up tape.
4. A cassette substantially as hereinbefore described with reference to Figs. 3 and 4 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08205778A GB2116145B (en) | 1982-02-26 | 1982-02-26 | Tape cassette with anti-friction members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08205778A GB2116145B (en) | 1982-02-26 | 1982-02-26 | Tape cassette with anti-friction members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2116145A true GB2116145A (en) | 1983-09-21 |
| GB2116145B GB2116145B (en) | 1985-11-13 |
Family
ID=10528657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08205778A Expired GB2116145B (en) | 1982-02-26 | 1982-02-26 | Tape cassette with anti-friction members |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2116145B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000055856A1 (en) * | 1999-03-12 | 2000-09-21 | Iomega Corporation | Ptfe fiber based liner for flexible high density magnetic media |
-
1982
- 1982-02-26 GB GB08205778A patent/GB2116145B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000055856A1 (en) * | 1999-03-12 | 2000-09-21 | Iomega Corporation | Ptfe fiber based liner for flexible high density magnetic media |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2116145B (en) | 1985-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010226 |