US3679842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for preparing copies or duplicates of wide band record carriers on which signals are recorded
Assignee: Individual
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Filing: 1969-11-10
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Granted: 1972-07-25
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Expires: 1989-11-10
Abstract
Abstract This invention provides a method and apparatus for preparing duplicates of wide band record carriers on which signals of a continuous program are recorded in a hundred or more track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, the track sections being separate and parallel to the length of the band or being made continuous either by arranging them in a helical path inclined slightly to the length of the band or by arranging them parallel to the length of the band and interconnecting them by inclined sections so that continuous reproduction is possible. Such recordings have a playing time of several hours. The method and apparatus herein described employ multiple playback heads past which the master wide band record, which may be in the form of an endless loop provided with a length of blank band between the ends of the track sections, is fed, and multiple recording heads respectively energized by the corresponding one of the playback heads and past which a copy band is fed, whereby the track sections may be duplicated simultaneously. The heads may be staggered along the paths of the respective bands and may, where the track sections are made continuous, follow tracking paths so that the duplicates have the track sections recorded thereon as a continuous program corresponding to the recording on the master wide band record being copied. By means of the invention the duplicates of the master recordings can be produced quickly and economicaly.
Inventors
- 👤 Jahangir M Ahy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86; G06; G06K; G06K1/00; G06K1/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
386 words
The method of preparing copies of wide band record carriers on which signals are recorded in a plurality of track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, said sections constituting parts of a continuous long playing track, which consists in repetitively circulating the master band, in the form of an endless loop provided with a blank portion between the ends of the track sections, past a playback device comprising a plurality of playback transducer heads disposed across the path of the master band in rows staggered along said path, heads for scanning adjacent track sections being in different rows, said heads corresponding in number and position to the number and position of the signal track sections on the master band, controlling the tracking of said playback transducer heads to move each said head transversely across the copy band by a small distance from an initial position, so that each head follows the path of its corresponding track section, and then to restore it to its initial position, during one complete circuit of the master band, said restoratiOn occurring, to align said playback transducer heads with the oncoming ends of the track sections, while the playback transducer heads are opposite the blank portion of the endless loop master band, and copying the signals recorded during each traverse of the master band past the playback transducer heads on to a copy band by drawing the copy band from a supply source and feeding it past a recording device comprising a corresponding number of recording transducer heads disposed transversely across the copy band in relative positions corresponding to the relative positions of the playback transducer heads of the playback device while controlling the tracking of said recording transducer heads in a manner corresponding to the tracking of said playback transducer heads, the plural signal outputs simultaneously produced from the individual playback transducer heads being fed respectively to the corresponding recording transducer heads to simultaneously record the signals in corresponding track sections on the copy band, blank spaces being provided on the copy band corresponding to the blank portion of the endless loop master band, and severing the recorded copy band through the blank spaces into lengths each comprising a copy of the signals recorded on the master band.
Claim 2
Independent Claim
386 words
The method of preparing copies of wide band record carriers on which signals are recorded in a plurality of track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, said sections constituting parts of a continuous long playing track, which consists in repetitively circulating the master band, in the form of an endless loop provided with a blank portion between the ends of the track sections, past a playback device comprising a plurality of playback transducer heads disposed across the path of the master band in rows staggered along said path, heads for scanning adjacent track sections being in different rows, said heads corresponding in number and position to the number and position of the signal track sections on the master band, controlling the tracking of said playback transducer heads to move each said head transversely across the copy band by a small distance from an initial position, so that each head follows the path of its corresponding track section, and then to restore it to its initial position, during one complete circuit of the master band, said restoratiOn occurring, to align said playback transducer heads with the oncoming ends of the track sections, while the playback transducer heads are opposite the blank portion of the endless loop master band, and copying the signals recorded during each traverse of the master band past the playback transducer heads on to a copy band by drawing the copy band from a supply source and feeding it past a recording device comprising a corresponding number of recording transducer heads disposed transversely across the copy band in relative positions corresponding to the relative positions of the playback transducer heads of the playback device while controlling the tracking of said recording transducer heads in a manner corresponding to the tracking of said playback transducer heads, the plural signal outputs simultaneously produced from the individual playback transducer heads being fed respectively to the corresponding recording transducer heads to simultaneously record the signals in corresponding track sections on the copy band, blank spaces being provided on the copy band corresponding to the blank portion of the endless loop master band, and severing the recorded copy band through the blank spaces into lengths each comprising a copy of the signals recorded on the master band.
Claim 3
Dependent Claim
39 words
The method as claimed in claim 1, wherein said blank portion between the ends of the track sections of the master band is of a length not less than the overall length occupied by the staggered playback transducer heads.
Claim 4
Dependent Claim
380 words
Apparatus for preparing copies of wide band record carriers on which signals are recorded in a plurality of track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, said sections constituting parts of a continuous long playing track, comprising: a playback device comprising a plurality of playback transducer heads disposed in a plurality of rows, with a plurality of transducer heads arranged side-by-side in each row, heads for scanning adjacent said track sections being in different rows, means for repetitively advancing a master band, in the form of an endless loop, across said playback device in a direction transverse to said rows of said playback transducer heads; a recording device comprising a plurality of recording transducer heads equal in number to the number of playback transducer heads and disposed in a plurality of rows in the same manner as the playback transducer heads; a source of copy band, means for drawing a copy band from said source and advancing it across said recording device in a direction transverse to said rows of recording transducer heads to form along the copy band copies of the signals recorded during each traverse of the master band across said playback device; a plurality of amplifiers equal in number to the number of playback transducer heads and each haing an input and an output; a plurality of connections between each playback transducer head and the input of a corresponding one of said amplifiers respectively; a plurality of further connections between the output of each amplifier and one of the recording transducer heads respectively; the output of an amplifier being connected to that one of the recording transducer heads which is correspondingly positioned to that playback transducer head which is connected to the input to said amplifier; means for progressively moving the playback device in the direction of its said rows of playback transducer heads through a small distance from an initial position and then restoring the playback device to its initial position during one complete circuit of the master band; and means for simultaneously progressively moving the recording device in the direction of its said rows of recording transducer heads through a small distance from an initial position and then restoring it to its initial position.
Claim 5
Dependent Claim
380 words
Apparatus for preparing copies of wide band record carriers on which signals are recorded in a plurality of track sections arranged side-by-side across the width of the band and generally parallel to the length of the band, said sections constituting parts of a continuous long playing track, comprising: a playback device comprising a plurality of playback transducer heads disposed in a plurality of rows, with a plurality of transducer heads arranged side-by-side in each row, heads for scanning adjacent said track sections being in different rows, means for repetitively advancing a master band, in the form of an endless loop, across said playback device in a direction transverse to said rows of said playback transducer heads; a recording device comprising a plurality of recording transducer heads equal in number to the number of playback transducer heads and disposed in a plurality of rows in the same manner as the playback transducer heads; a source of copy band, means for drawing a copy band from said source and advancing it across said recording device in a direction transverse to said rows of recording transducer heads to form along the copy band copies of the signals recorded during each traverse of the master band across said playback device; a plurality of amplifiers equal in number to the number of playback transducer heads and each haing an input and an output; a plurality of connections between each playback transducer head and the input of a corresponding one of said amplifiers respectively; a plurality of further connections between the output of each amplifier and one of the recording transducer heads respectively; the output of an amplifier being connected to that one of the recording transducer heads which is correspondingly positioned to that playback transducer head which is connected to the input to said amplifier; means for progressively moving the playback device in the direction of its said rows of playback transducer heads through a small distance from an initial position and then restoring the playback device to its initial position during one complete circuit of the master band; and means for simultaneously progressively moving the recording device in the direction of its said rows of recording transducer heads through a small distance from an initial position and then restoring it to its initial position.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |