US4389680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Special effects editing method and apparatus using retrieved video
Assignee: Individual
•
Filing: 1980-12-17
•
Granted: 1983-06-21
•
Expires: 2000-12-17
Abstract
Abstract Apparatus and method for retrieving existing video signals from video tape just prior to re-recording to achieve dissolve edits and special-effects edits on that tape.
Inventors
- 👤 William D. Gramling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:07
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/022; G11B27/029
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
In a video editing apparatus, a head assembly for receiving relatively moving video tape wherein at least a pair of transducers are mounted in a set on said head assembly, said transducers in said set comprising an erasing transducer followed by a recording transducer, the invention characterized by the addition of a further reproducing transducer in said set which retrieves the signals on video tape moving relative to said head assembly prior to said signals being erased by said erasing transducer and means for mixing video signals from another source with signals retrieved by said reproducing transducer, and transmitting said mixed signals to said recording transducer.
Claim 2
Dependent Claim
106 words
In a video editing apparatus, a head assembly for receiving relatively moving video tape wherein at least a pair of transducers are mounted in a set on said head assembly, said transducers in said set comprising an erasing transducer followed by a recording transducer, the invention characterized by the addition of a further reproducing transducer in said set which retrieves the signals on video tape moving relative to said head assembly prior to said signals being erased by said erasing transducer and means for mixing video signals from another source with signals retrieved by said reproducing transducer, and transmitting said mixed signals to said recording transducer.
Claim 3
Dependent Claim
16 words
A video editing apparatus according to claim 1 wherein said head assembly comprise a rotating headwheel.
Claim 4
Dependent Claim
31 words
A video editing apparatus according to claim 1 comprising delay means connected to said reproducing transducer to delay signals prior to said signals being mixed with signals from said another source.
Claim 5
Dependent Claim
20 words
A video editing apparatus according to claim 1 wherein two sets of said transducers are mounted on said head assembly.
Claim 6
Independent Claim
78 words
A method of mixing signals on video tape with signals from another source which comprises the steps of retrieving video signals by a transducer from a video tape moving relative to a head assembly on which said transducer is mounted, erasing said video signals on said video tape, mixing said retrieved video signals with video signals from another source, and recording said video signals on said erased video tape by a further transducer mounted on said head assembly.
Claim 7
Independent Claim
78 words
A method of mixing signals on video tape with signals from another source which comprises the steps of retrieving video signals by a transducer from a video tape moving relative to a head assembly on which said transducer is mounted, erasing said video signals on said video tape, mixing said retrieved video signals with video signals from another source, and recording said video signals on said erased video tape by a further transducer mounted on said head assembly.
Claim 8
Dependent Claim
30 words
A method of mixing signals on videotape with signals from another source according to claim 5 wherein said head assembly on which said transducers are mounted, is a rotated headwheel.
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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |