US3869723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing apparatus having dual capstans for use with cassettes
Assignee: Sony Corp
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Filing: 1972-06-02
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Granted: 1975-03-04
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Expires: 1992-06-02
Abstract
Abstract In a magnetic recording and reproducing apparatus of the dual capstan type, that is, in which a magnetic tape preferably contained in a cassette is driven simultaneously by two spaced apart drive assemblies each constituted by a rotated drive shaft or capstan and a pinch roller movable against the capstan, for example, through the usual window of the cassette, at least one magnetic recording head and at least one magnetic reproducing head are located between the two drive assemblies for respectively recording and reproducing signals on the tape as the latter is transported by the drive assemblies, and at least one magnetic erasing head is mounted adjacent the pinch roller of one of the drive assemblies, at the side of that pinch roller facing away from the other drive assembly, and is movable with the adjacent pinch roller for engaging the tape through the same window of the cassette.
Inventors
- 👤 Kenji Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1883; G11B5/00; G11B5/127; G11B5/187
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
199 words
An apparatus for magnetically recording and reproducing signals on a magnetic tape, comprising simultaneously operative, spaced apart first and second drive means for transporting the tape at least in the direction from said first drive means to said second drive means in a path having a portion extending between said first and second drive means, each of said drive means including a rotated drive shaft and a pinch roller carried by a movable mounting means for movement against the respective drive shaft with the tape therebetween, at least one magnetic recording head means and at least one magnetic reproducing head means engageable with the tape at spaced locations along said portion of the tape path for respectively recording and reproducing signals on the tape during the transport thereof by said first and second drive means, and at least one magnetic erasing head means carried by said mounting means for the pinch roller of said first drive means and being disposed adjacent said pinch roller of the first drive means at the side of the latter away from said second drive means for engaging the tape simultaneously with said movement of the adjacent pinch roller against said respective drive shaft.
Claim 2
Independent Claim
199 words
An apparatus for magnetically recording and reproducing signals on a magnetic tape, comprising simultaneously operative, spaced apart first and second drive means for transporting the tape at least in the direction from said first drive means to said second drive means in a path having a portion extending between said first and second drive means, each of said drive means including a rotated drive shaft and a pinch roller carried by a movable mounting means for movement against the respective drive shaft with the tape therebetween, at least one magnetic recording head means and at least one magnetic reproducing head means engageable with the tape at spaced locations along said portion of the tape path for respectively recording and reproducing signals on the tape during the transport thereof by said first and second drive means, and at least one magnetic erasing head means carried by said mounting means for the pinch roller of said first drive means and being disposed adjacent said pinch roller of the first drive means at the side of the latter away from said second drive means for engaging the tape simultaneously with said movement of the adjacent pinch roller against said respective drive shaft.
Claim 3
Dependent Claim
42 words
An apparatus according to claim 1, in which said recording head means and said reproducing head means are arranged in succession along said portion of the tape path considered in said direction from the first drive means to the second drive means.
Claim 4
Dependent Claim
79 words
An apparatus according to claim 2, in which said erasing head means includes a core having a relatively narrow end portion for engagement with the tape immediately adjacent said pinch roller of the first drive means, a relatively wide base portion at said mounting means and an arcuate side surface extending between said end and base portions of the core, and being concentric with said adjacent pinch roller which has its peripheral surface close to said arcuate side surface.
Claim 5
Dependent Claim
25 words
An apparatus according to claim 3, further comprising guide means for guiding the tape relative to said erasing head means and said adjacent pinch roller.
Claim 6
Independent Claim
283 words
An apparatus for magnetically recording and reproducing signals on a magnetic tape contained in a cassette including an edge wall having first and second spaced windows and at least third and fourth spaced windows between said first and second windows, with a run of the tape being guided along said edge wall for exposure at the windows therein, said apparatus comprising a chassis having cassette holding means thereon for receiving and positioning a cassette on said chassis, first and second rotatable drive shafts mounted on said chassis for extending into a cassette positioned by said holding means adjacent the tape exposed at said first and second windows, respectively, first and second pinch rollers, movable mounting means carrying said first and second pinch rollers for movement between inoperative positions remote from said drive shafts and operative positions where said first and second pinch rollers reach through said first and second windows of the cassette to engage the tape against said first and second drive shafts for simultaneous transport of the tape by the latter, at least one magnetic recording head means and at least one magnetic reproducing head means located between said first and second pinch rollers and engageable with the tape through the third and fourth windows of the cassette for respectively recording and reproducing signals on the tape as the latter is transported by said drive shafts, and at least one magnetic erasing head means carried by said mounting means adjacent said first pinch roller at the side of the latter facing away from said second pinch roller for engaging the tape through said first window of the cassette simultaneously with the movement of said first pinch roller into said first window.
Claim 7
Independent Claim
283 words
An apparatus for magnetically recording and reproducing signals on a magnetic tape contained in a cassette including an edge wall having first and second spaced windows and at least third and fourth spaced windows between said first and second windows, with a run of the tape being guided along said edge wall for exposure at the windows therein, said apparatus comprising a chassis having cassette holding means thereon for receiving and positioning a cassette on said chassis, first and second rotatable drive shafts mounted on said chassis for extending into a cassette positioned by said holding means adjacent the tape exposed at said first and second windows, respectively, first and second pinch rollers, movable mounting means carrying said first and second pinch rollers for movement between inoperative positions remote from said drive shafts and operative positions where said first and second pinch rollers reach through said first and second windows of the cassette to engage the tape against said first and second drive shafts for simultaneous transport of the tape by the latter, at least one magnetic recording head means and at least one magnetic reproducing head means located between said first and second pinch rollers and engageable with the tape through the third and fourth windows of the cassette for respectively recording and reproducing signals on the tape as the latter is transported by said drive shafts, and at least one magnetic erasing head means carried by said mounting means adjacent said first pinch roller at the side of the latter facing away from said second pinch roller for engaging the tape through said first window of the cassette simultaneously with the movement of said first pinch roller into said first window.
Claim 8
Dependent Claim
34 words
An apparatus according to claim 5, in which said mounting means for the pinch rollers includes a movable carriage carrying both of said pinch rollers and also carrying said recording and reproducing head means.
Claim 9
Dependent Claim
52 words
An apparatus according to claim 5, in which said erasing head means includes a magnetic core for engaging the tape and erasing signals recorded in the latter and a head holder receiving the core and having guide means for guiding the tape relative to said core and the adjacent first pinch roller.
Claim 10
Dependent Claim
71 words
An apparatus according to claim 7, in which said magnetic core and head holder have a relatively narrow end portion for engagement with the tape immediately adjacent said first pinch roller, a relatively wide base portion at said mounting means and an arcuate side surface extending between sAid end and base portions and being concentric with said first pinch roller which has its peripheral surface close to said arcuate side surface.
Claim 11
Dependent Claim
30 words
An apparatus according to claim 8, in which said end portion of the head holder has flanks extending beyond said end portion of the core to form said guide means.
Claim 12
Dependent Claim
23 words
An apparatus according to claim 8, in which said end portion of the core has a curved surface for contact with the tape.
Claim 13
Dependent Claim
19 words
An apparatus according to claim 10, in which said curved end surface of the core has a gap therein.
Claim 14
Dependent Claim
57 words
An apparatus according to claim 5, further comprising drive means for rotating said drive shafts in the direction to transport the tape in the direction from said first shaft toward said second shaft and said recording head means and said reproducing head means are arranged in succession considered in said direction in which the tape is transported.
Claim 15
Dependent Claim
34 words
An apparatus according to claim 12, further comprising guide means for guiding the tape relative to the adjacent first pinch roller, and in which additional guide means are disposed adjacent said second pinch roller.
Claim 16
Dependent Claim
189 words
An apparatus according to claim 5, in which said one recording head means is disposed between said one reproducing head means and said first pinch roller, and further comprising a second magnetic recording head means disposed between said reproducing head means and said second pinch roller and being engageable with the tape through a fifth window in the cassette edge wall, a second magnetic erasing head means carried by said mounting means adjacent said second pinch roller at the side of the latter facing away from said first pinch roller for engaging the tape through said second window of the cassette simultaneously with the movement of said second pinch roller into said second window, and reversible drive means for selectively rotating said drive shafts in one direction by which the tape is transported from said first drive shaft toward said second drive shaft while said one erasing, recording and reproducing head means are operative, and in the opposite direction by which the tape is transported from said second drive shaft toward said first drive shaft while said second erasing and recording heads and said one reproducing head are operative.
Claim 17
Dependent Claim
33 words
An apparatus according to claim 14, further comprising first and second guide means for guiding the tape relative to the one and second erasing head means and relative to the adjacent pinch roller.
Claim 18
Dependent Claim
190 words
An apparatus according to claim 5, in which said one reproducing head means is disposed between said one recording head means and said second pinch roller, and further comprising a second magnetic reproducing head means disposed between said one recording head means and said first pinch roller and being engageable with the tape through a fifth window in the cassette edge wall, a second magnetic erasing head means carried by said mounting means adjacent said second pinch roller at the side of the latter facing away from said first pinch roller for engaging the tape through said second window of the cassette simultaneously with the movement of said second pinch roller into said second window, and reversible drive means for selectively rotating said drive shafts in one direction by which the tape is transported from said first drive shaft toward said second drive shaft while said one erasing, recording and reproducing head means are operative, and in the opposite direction by which the tape is transported from said second drive shaft toward said first drive shaft while said second erasing and reproducing heads and said one recording head are operative.
Claim 19
Dependent Claim
33 words
An apparatus according to claim 16, further comprising first and second guide means for guiding the tape relative to the one and second erasing head means and relative to the adjacent pinch roller.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |