US4888653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed video tape duplicator
Assignee: Eastman Kodak Co
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Filing: 1987-12-28
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Granted: 1989-12-19
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Expires: 2007-12-28
Abstract
Abstract A video tape duplicator for duplicating a video signal simultaneously on a plurality of video tapes at high speed. The duplicator includes a source for providing a high frequency video signal and a record head for simultaneously recording the high frequency video signal on a plurality of duplicate magnetic tapes. The record head rotates at a speed which is related to the frequency of the high frequency signal so that the duplicate tape may be played back at normal head and tape speeds.
Inventors
- 👤 Dennis Cullum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:03
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/022; G11B27/024; G11B5/00; G11B5/86; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
Apparatus for high speed duplicating of video tape, comprising: means for providing a high frequency video signa; and record head means for simultaneously recording said high frequency video signal on a plurality of duplicate magnetic tapes at a record head speed which is N times the head speed at which said recorded signal is normally played back such that the track length T of a field of video signal recorded on said duplicate magnetic tapes is equal to the normal track length of a field of video signal.
Claim 2
Dependent Claim
88 words
Apparatus for high speed duplicating of video tape, comprising: means for providing a high frequency video signa; and record head means for simultaneously recording said high frequency video signal on a plurality of duplicate magnetic tapes at a record head speed which is N times the head speed at which said recorded signal is normally played back such that the track length T of a field of video signal recorded on said duplicate magnetic tapes is equal to the normal track length of a field of video signal.
Claim 3
Dependent Claim
60 words
The apparatus of claim 1 wherein said record head means includes a record head drum having a plurality of pairs of heads, wherein the circumferential spacing between adjacent heads of said record head drum is equal to a distance T, and including duplicate tape transport means for simultaneously transporting a plurality of duplicate tapes past said record head drum means.
Claim 4
Dependent Claim
48 words
The apparatus of claim 1 wherein said video signal providing means includes playback head means for playing back video signals from a master magnetic tape at a rotational head speed which is N times the normal playback head speed so as to produce said high frequency video signal.
Claim 5
Dependent Claim
29 words
The apparatus of claim 3 including means for transporting said master tape past said playback head at a tape speed which is N times the normal tape playback speed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |