Patent US3652808A successfully refreshed from Google Patents.
US3652808A
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Apparatus and method for reverse recording a master tape for contact duplication of magnetic tapes
Assignee: Ampex Corp
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Filing: 1969-11-20
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Granted: 1972-03-28
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Expires: 1989-11-20
Abstract
Abstract In a wideband, transverse scan magnetic tape recording system, such as used for video signals, a standard transport is modified for recording high resolution and magnetically durable master tapes to be used in making multiple copies thereof by a contact duplicating process in which a blank tape is brought into faceto-face contact with the master tape. In particular, the transport for recording the master tape is arranged to record the transverse magnetic tracks in a pattern having a reflected or mirror image relationship with the tracking format carried by tapes adapted for playback on a standard transverse scan transport. The contact duplicate of the master thus receives the proper magnetic image for playback on standard machines. The modifications which are made to the standard recording mechanism are such that a single transport unit may be employed for recording of the master tape, playback of the contact duplicate tapes made therefrom, or recording and playback of other standard tapes, by interchanging a few component parts and making certain minor adjustments to the standard unit depending on the desired use.
Inventors
- 👤 Daniel David Esterly
- 👤 Larry Michael Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:18
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86; G11B5/865
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
189 words
A recording system having a transverse scan tape transport for recording a master magnetic tape, wherein such master tape is to be used for making a contact duplicate tape having a mirror magnetic image of the former, said duplicate and master tapes having corresponding first and second longitudinal edges with respect to the magnetic record surfaces thereof, and said duplicate tape to be played back on a transverse scan tape transport having a head wheel means rotating in a given sense with respect to the direction of tape advancement and having a stationary magnetic head means disposed to read a prerecorded longitudinal magnetic track adjacent the first edge of said duplicate tape; said transport for recording said master tape characterized by having the same relative direction of tape advancement as the transport for playing back the duplicate tape and having a head wheel means rotating in a sense opposite said given rotational sense and having a stationary magnetic head means disposed to record a longitudinal track on said master tape adjacent the second edge thereof corresponding to said prerecorded longitudinal track adjacent the first edge on said duplicate tape.
Claim 2
Dependent Claim
189 words
A recording system having a transverse scan tape transport for recording a master magnetic tape, wherein such master tape is to be used for making a contact duplicate tape having a mirror magnetic image of the former, said duplicate and master tapes having corresponding first and second longitudinal edges with respect to the magnetic record surfaces thereof, and said duplicate tape to be played back on a transverse scan tape transport having a head wheel means rotating in a given sense with respect to the direction of tape advancement and having a stationary magnetic head means disposed to read a prerecorded longitudinal magnetic track adjacent the first edge of said duplicate tape; said transport for recording said master tape characterized by having the same relative direction of tape advancement as the transport for playing back the duplicate tape and having a head wheel means rotating in a sense opposite said given rotational sense and having a stationary magnetic head means disposed to record a longitudinal track on said master tape adjacent the second edge thereof corresponding to said prerecorded longitudinal track adjacent the first edge on said duplicate tape.
Claim 3
Dependent Claim
37 words
In the system as defined in claim 1, said corresponding longitudinal tracks on said duplicate and master tapes being further defined as corresponding control tracks for synchronizing longitudinal tape advancement with rotation of said head wheel means.
Claim 4
Dependent Claim
81 words
In the system as defined in claim 1, said transport for playing back the duplicate tape having a curved vacuum tape guide disposed adjacent said head wheel means and being formed with a shoulder for engaging and positioning the first edge of said duplicate tape, and said transport for recording said master tape characterized by having a curved vacuum tape guide disposed adjacent said head wheel and formed with a shoulder engaging and positioning the second edge of said master tape.
Claim 5
Dependent Claim
191 words
In the system as defined in claim 1 adapted for making contact duplicates of video tape recordings wherein said corresponding longitudinal tracks are control tracks adjacent the first edge of said duplicate tape and adjacent the second edge of said master tape respectively, and said tapes being further provided with corresponding audio tracks adjacent the secOnd edge of said duplicate tape and adjacent the first edge of said master tape, and wherein said stationary head means on the playback transport is a control track reproduce head disposed adjacent said first edge of said duplicate tape and a stationary audio reproduce head is disposed adjacent the second edge of said duplicate tape for reading said audio track during playback thereof, and said transport for recording said master tape further characterized by its stationary head means being a control track record head disposed for recording a longitudinal control track adjacent an edge of said master tape corresponding to the second edge of said duplicate tape, and having an audio record head disposed for recording a longitudinal audio track adjacent the edge of said master tape corresponding the first edge of said duplicate tape.
Claim 6
Dependent Claim
106 words
In the system as defined in claim 4, wherein said duplicate tape is to be provided with a longitudinal cue track in juxtaposition said control track and said transport for playing back said duplicate tape is equipped with a stationary cue reproduce head disposed adjacent said first edge of said duplicate tape for reading said cue track, and said transport for recording said master tape further defined by having a cue track record head disposed adjacent an edge of said master tape corresponding to the second edge of said duplicate tape for recording a longitudinal cue track along side said control track on said master tape.
Claim 7
Dependent Claim
62 words
In a transverse scan tape record/reproduce system as defined in claim 1, wherein said transport for playing back said duplicate tape and said transport for recording said master tape are each equipped with capstan drives situated in the same position and both advancing the respective tapes in the same longitudinal direction when viewed with reference to the magnetic surfaces of said tapes.
Claim 8
Dependent Claim
62 words
In a transverse scan tape record/reproduce system as defined in claim 6, said transport for recording said master tape being a modified form of said transport for playing back said duplicate tapes in that the rotational sense of said head wheel and the location of said stationary magnetic head means are changed as defined on said transport for recording said master tape.
Claim 9
Independent Claim
147 words
A method of recording a master magnetic tape on a master transverse scan tape transport for use in making a contact duplicate tape therefrom wherein such duplicate tape is to be played back on a transverse scan tape transport having a head wheel rotating in a given sense with respect to the direction of longitudinal tape advancement and having a stationary magnetic head means disposed to reproduce a longitudinal track adjacent a given edge of such duplicate tape, comprising the steps of rotating the master transport head wheel during recording in an opposite sense from said given sense, advancing the tape on the master transport in the same longitudinal direction as on the playback transport, and recording a longitudinal track corresponding to the above mentioned longitudinal track on said master tape adjacent an edge thereof opposite the edge corresponding to said given edge on said duplicate tape.
Claim 10
Independent Claim
147 words
A method of recording a master magnetic tape on a master transverse scan tape transport for use in making a contact duplicate tape therefrom wherein such duplicate tape is to be played back on a transverse scan tape transport having a head wheel rotating in a given sense with respect to the direction of longitudinal tape advancement and having a stationary magnetic head means disposed to reproduce a longitudinal track adjacent a given edge of such duplicate tape, comprising the steps of rotating the master transport head wheel during recording in an opposite sense from said given sense, advancing the tape on the master transport in the same longitudinal direction as on the playback transport, and recording a longitudinal track corresponding to the above mentioned longitudinal track on said master tape adjacent an edge thereof opposite the edge corresponding to said given edge on said duplicate tape.
Claim 11
Dependent Claim
30 words
A method of recording a master tape as defined in claim 8, wherein said longitudinal track is a control track for synchronizing rotation of said head wheel during playback modes.
Claim 12
Dependent Claim
78 words
The method as defined in claim 8, wherein said head wheel carries a plurality of four magnetic heads circumferentially spaced thereabout and a sequential switching means coupled to said heads is provided for combining the playback signals therefrom, further comprising the step of playing back said master tape by rotating the head wheel in the same sense by which such tape was recorded and reversing the connections of a pair of non-adjacent said heads to said switching means.
Claim 13
Dependent Claim
96 words
The method as defined in claim 8, wherein said head wheel carries a plurality of magnetic heads circumferentially spaced thereabout and a tachometer disc rotates jointly with said head Wheel and is formed with a plurality of circumferentially yet non-symetrically disposed indexes providing information to a tachometer pickup indicating the rotational position of certain of said heads, further comprising the step of reversing the orientation of said tachometer disc to provide the same information to said pickup during recording of said master tape during which the rotation of the head wheel and tachometer disc is reversed.
Claim 14
Dependent Claim
118 words
A method as defined in claim 8, wherein said stationary magnetic head means on said transport for playing back said duplicate tape is a control track reproduce head disposed for reading a longitudinal control track adjacent a first edge of the tape and such transport further having a stationary information reproduce head disposed for reading a longitudinal information track adjacent a second edge of the duplicate tape, and further comprising the step of, recording a corresponding master control track along an edge of said master tape corresponding to the second edge of said duplicate tape and recording a corresponding master information track along an edge of said master tape corresponding to the first edge of said duplicate tape.
Claim 15
Dependent Claim
76 words
The method as defined in claim 12, wherein the transport for playing back said duplicate tape is equipped with an additional information reproduce head disposed for reading an additional longitudinal information track in juxtaposition with said control track, and further comprising the step of recording on said master tape a corresponding additional information track along side said master control track adjacent an edge of said master tape corresponding to the first edge of said duplicate tape.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |