Patent US4513929A successfully refreshed from Google Patents.
US4513929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape cassette
Assignee: Fujifilm Holdings Corp
•
Filing: 1983-05-13
•
Granted: 1985-04-30
•
Expires: 2003-05-13
Abstract
Abstract A magnetic tape cassette having a pair of reels each having a peripheral portion provided with a gear. A slide type brake member engages the gears to stop rotation of said reels. A brake releasing bar insertion hole cut in a cassette half thereof is maintained covered by the brake member, so that the inside of said cassette is isolated from the outside. The brake member is urged towards the brake releasing bar insertion hole by a spring member.
Inventors
- 👤 Kengo Oishi
- 👤 Osamu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08721
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
A magnetic tape cassette comprising a pair of reels rotatably mounted in said cassette with each reel having a geared peripheral portion, a brake member slidably mounted in said cassette for selectively engaging said gears to stop rotation of said reels and a brake releasing bar insertion hole located in a portion of said cassette adjacent said brake member, said brake member being comprised of a cover portion having a blind bore therein slidably engaging said cassette with said blind bore in communication with said hole whereby the inside of said cassette is isolated from the outside environment and a pair of end portions extending from said cover portion for engaging the geared peripheral portion of the respective reels.
Claim 2
Dependent Claim
119 words
A magnetic tape cassette comprising a pair of reels rotatably mounted in said cassette with each reel having a geared peripheral portion, a brake member slidably mounted in said cassette for selectively engaging said gears to stop rotation of said reels and a brake releasing bar insertion hole located in a portion of said cassette adjacent said brake member, said brake member being comprised of a cover portion having a blind bore therein slidably engaging said cassette with said blind bore in communication with said hole whereby the inside of said cassette is isolated from the outside environment and a pair of end portions extending from said cover portion for engaging the geared peripheral portion of the respective reels.
Claim 3
Dependent Claim
28 words
A magnetic tape cassette as set forth in claim 1 further comprising spring means biasing said brake member toward engagement with the geared peripheral portions of said reels.
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) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |