US3686470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two shell magnetic tape cartridge
Assignee: International Business Machines Corp
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Filing: 1970-11-27
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Granted: 1972-08-22
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Expires: 1990-11-27
Abstract
Abstract A cartridge stores a magnetic recording tape on two reels. Two non-symmetrical molded shells form a hollow chamber retaining the tape and reels and incorporating file protection. Mechanical registration holes through both shells provide distinguishable accesses for photosensing different tape conditions. Indented edges facilitate clamping in a recorder.
Inventors
- 👤 Eugene G Stahlberg
- 👤 James M Tagawa
- 👤 Hui-Li Tiao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:59
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
A magnetic recording tape cartridge for retaining tape on two flangeless reels, both during use of the tape by a tape drive and during storage of the tape, comprising: a first cartridge shell having a generally rectangular shape, a raised periphery, a raised center section, registration means, and a clamping edge on each of two opposite sides; a second cartridge shell, intended to be fastened to said first shell, having a generally rectangular shape, a raised periphery, two drive apertures, registration means matable with the registration means of said first shell, a number of light holes passing from a cartridge side through the registration means, and a clamping edge on each of two opposite sides; and fastening means, for securing said first and second shells together to form a cartridge.
Claim 2
Dependent Claim
130 words
A magnetic recording tape cartridge for retaining tape on two flangeless reels, both during use of the tape by a tape drive and during storage of the tape, comprising: a first cartridge shell having a generally rectangular shape, a raised periphery, a raised center section, registration means, and a clamping edge on each of two opposite sides; a second cartridge shell, intended to be fastened to said first shell, having a generally rectangular shape, a raised periphery, two drive apertures, registration means matable with the registration means of said first shell, a number of light holes passing from a cartridge side through the registration means, and a clamping edge on each of two opposite sides; and fastening means, for securing said first and second shells together to form a cartridge.
Claim 3
Dependent Claim
27 words
The cartridge of claim 1 wherein there is provided an opening in one side of the assembled cartridge to make the tape available to a tape transducer.
Claim 4
Dependent Claim
41 words
The cartridge of claim 2 wherein the registration means comprises two flat-sided receivers on one shell and two generally circular inserts in the other shell externally dimensioned to securely mate with internal portions of the receivers tangentially to the insert circumferences.
Claim 5
Dependent Claim
40 words
The cartridge of claim 3 wherein there is provided in one of the shells an opening for a drive capstan and an associated opening is provided on one side of the assembled cartridge to expose the tape opposite the capstan.
Claim 6
Dependent Claim
57 words
The cartridge of claim 4 wherein each shell is provided with recessed holes for receiving fasteners, and there are provided a number of file-protect pins removably mountable in selected ones of said recessed fastener holes for limiting utilization of the tape as a function of the presence of pins in, and absence of pins from, preselected holes.
Claim 7
Dependent Claim
27 words
The cartridge of claim 5 wherein there is provided a flexible dust cover, retainable over the raised periphery of the cartridge, which provides protection for exposed tape.
Claim 8
Dependent Claim
33 words
The cartridge of claim 4 wherein there is provided on one shell a file protection receptacle for receiving a file protection insert stored in said receptacle in a selected one of two positions.
Claim 9
Dependent Claim
32 words
The cartridge of claim 7 wherein the file protection receptacle has a slot and a cam surface and the insert is keyed to slide in the slot and lock on the surface.
Claim 10
Dependent Claim
25 words
The cartridge of claim 8 wherein there is provided on the other shell an aperture for making the position of the file protection insert visible.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |