Patent US4054252A successfully refreshed from Google Patents.
US4054252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape cassette
Assignee: Fujifilm Holdings Corp
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Filing: 1976-09-28
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Granted: 1977-10-18
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Expires: 1996-09-28
Abstract
Abstract A magnetic tape cassette including tape guide supporting mechanisms, each being disposed frontwardly of each fixed pin closest to each reel to uniformly align the reeling surface and to stabilize the travelling of a tape.
Inventors
- 👤 Kengo Oishi
- 👤 Osamu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:51
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
151 words
A magnetic tape cassette including a hollow case, a pair of reels mounted within said hollow case, a magnetic tape wound onto at least one of said reels, a pressing pad for urging said tape against a recording and reproducing head, a pair of round rod guide members for guiding said tape and a pair of rotary guide members individually mounted between said round rod guide members and said pressing pad; the improvement comprising, a pair of tape guide mechanisms individually disposed between each of said reels and said round rod guide members in a position which will reduce the contact angle between said round rod guide members and said tape as compared to what it would be in the absence of said tape guide mechanisms; said tape guide mechanisms having flange portions for supporting the tape in the width direction as it reels onto and unreels from the respective reels.
Claim 2
Dependent Claim
151 words
A magnetic tape cassette including a hollow case, a pair of reels mounted within said hollow case, a magnetic tape wound onto at least one of said reels, a pressing pad for urging said tape against a recording and reproducing head, a pair of round rod guide members for guiding said tape and a pair of rotary guide members individually mounted between said round rod guide members and said pressing pad; the improvement comprising, a pair of tape guide mechanisms individually disposed between each of said reels and said round rod guide members in a position which will reduce the contact angle between said round rod guide members and said tape as compared to what it would be in the absence of said tape guide mechanisms; said tape guide mechanisms having flange portions for supporting the tape in the width direction as it reels onto and unreels from the respective reels.
Claim 3
Dependent Claim
23 words
A magnetic tape cassette as claimed in claim 1, wherein each said tape guide mechanism is a roller rotatably supported in said cassette.
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |