Patent US4257079A successfully refreshed from Google Patents.
US4257079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rewinding magnetic tape in video cassette
Assignee: TDK Corp
•
Filing: 1979-05-16
•
Granted: 1981-03-17
•
Expires: 1999-05-16
Abstract
Abstract An apparatus for rewinding a magnetic tape in a video cassette comprises a feeding reel and a winding reel which hold a cleaning tape along a part of the magnetic tape; a pushing pad for pushing the cleaning tape on the magnetic tape; and means for driving the winding reel to feed the cleaning tape at a low speed to the direction reversing to the forward direction of the magnetic tape.
Inventors
- 👤 Keiichi Yoshizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:59
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/50; G11B23/502
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
In an apparatus for rewinding a magnetic tape in a video cassette, said cassette including at least one exterior flat surface over which said tape passes during rewinding, a tape cleaning device comprising: a movable pushing pad located opposite said flat surface from said magnetic tape; a cleaning tape extending between said movable pushing pad and said magnetic tape, said cleaning tape normally in contact with said pushing pad; a supply reel and a take up reel for said cleaning tape; means for continuously driving at least one of said reels only when said magnetic tape is rewound, said means adapted to rotate said at least one reel in a direction which moves said cleaning tape opposite the direction of said magnetic tape; and means adapted for moving said pushing pad adjacent said exterior flat surface of said cassette, with said cleaning and magnetic tapes positively held therebetween, to thereby clean said magnetic tape, said means for moving said pushing pad being actuated by the rewinding of said magnetic tape.
Claim 2
Dependent Claim
170 words
In an apparatus for rewinding a magnetic tape in a video cassette, said cassette including at least one exterior flat surface over which said tape passes during rewinding, a tape cleaning device comprising: a movable pushing pad located opposite said flat surface from said magnetic tape; a cleaning tape extending between said movable pushing pad and said magnetic tape, said cleaning tape normally in contact with said pushing pad; a supply reel and a take up reel for said cleaning tape; means for continuously driving at least one of said reels only when said magnetic tape is rewound, said means adapted to rotate said at least one reel in a direction which moves said cleaning tape opposite the direction of said magnetic tape; and means adapted for moving said pushing pad adjacent said exterior flat surface of said cassette, with said cleaning and magnetic tapes positively held therebetween, to thereby clean said magnetic tape, said means for moving said pushing pad being actuated by the rewinding of said magnetic tape.
Claim 3
Dependent Claim
34 words
An apparatus according to claim 1 wherein said magnetic tape is held by guide pins from the rear surface of said magnetic tape near the position of pushing said cleaning tape by said pad.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 1 which further comprises a nozzle from which air is blown toward downstream of said magnetic tape travel so as to remove dust from the surface of said magnetic tape.
Claim 5
Dependent Claim
24 words
An apparatus according to claim 1 wherein said pad is connected at a top of a shifting lever which is shifted by being unlocked.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |