US3883893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape recording and reproducing apparatus
Assignee: Pioneer Corp
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Filing: 1974-03-11
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Granted: 1975-05-13
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Expires: 1994-03-11
Abstract
Abstract A tape recorder utilizing a tape cassette is disclosed which eliminates the tape slack between supply reel and take-up reel. When the tape cassette is placed in the play position, the supply reel is first rotated in the backward direction to remove the tape slack. Then the take-up reel is started to rotate by the stretched tape. A detecting device is provided to detect the rotation of the take-up reel in the backward direction. The detecting device triggers a control device which in turn switches the rotation of the take-up reel and permits pinch roller to engage with capstan to transfer the tape in the forward direction for ordinary performance.
Inventors
- 👤 Yoshiharu Ueki
- 👤 Yoshio Maruyama
- 👤 Yoshihiro Magata
- 👤 Akihiro Fushimi
- 👤 Katsuhisa Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:54
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/44; G11B15/444; G11B15/43; G11B15/46; G11B15/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
In a casette tape recording and reproducing device of the type having rotatable supply and take-up spindles to engage the supply and take-up reels in the casette, at least one capstan tape driving means, at least one pinch roller selectably engageable with said capstan, a motor driven means to rotate said at least one capstan, and a moveable carriage to bring said pinch rollers into contact with said capstan and the transducer head into contact with the tape, the improvements comprising: a. means to rotate said supply spindle in a rewind direction, by running the motor in the reverse direction, b. means for sensing rotation of the take-up spindle in the rewind direction, c. means responsive to said sensing means to change the direction of the motor to the forward direction, and to move the carriage so as to engage the transducer head with the tape and bring said at least one pinch roller into contact with said at least one capstan to provide a driving movement to the tape.
Claim 2
Dependent Claim
170 words
In a casette tape recording and reproducing device of the type having rotatable supply and take-up spindles to engage the supply and take-up reels in the casette, at least one capstan tape driving means, at least one pinch roller selectably engageable with said capstan, a motor driven means to rotate said at least one capstan, and a moveable carriage to bring said pinch rollers into contact with said capstan and the transducer head into contact with the tape, the improvements comprising: a. means to rotate said supply spindle in a rewind direction, by running the motor in the reverse direction, b. means for sensing rotation of the take-up spindle in the rewind direction, c. means responsive to said sensing means to change the direction of the motor to the forward direction, and to move the carriage so as to engage the transducer head with the tape and bring said at least one pinch roller into contact with said at least one capstan to provide a driving movement to the tape.
Claim 3
Dependent Claim
54 words
The improved casette tape recording and reproducing device of claim 1 wherein the sensing means comprises: a. pulse generator means driven by said take-up spindle, b. isolation means connected to said pulse generating means, c. rectifying means connected to said isolation means, and d. threshold means responsive to the output of said rectifying means.
Claim 4
Dependent Claim
19 words
The improved casette tape recording and reproducing device of claim 2 wherein said threshold means is a Schmitt trigger.
Claim 5
Dependent Claim
51 words
The improved cassette tape recording and reproducing device of claim 2 wherein said means responsive to said sensing means comprises: a. switch means responsive to the output of said threshold means to change the direction of the motor, and b. carriage control means responsive to the output of said rectifying means.
Claim 6
Dependent Claim
102 words
The improved casette tape recording and reproducing device of claim 4 wherein said carriage control means comprises: a. switch means connected to the output of said rectifying means, b. a solenoid electrically connected to said switch means, the plunger of said solenoid mechanically connected to a first hook, pivoted to a stationary support structure, c. a second hook rigidly attached to said moveable carriage, said second hook engaging said first hook at one extremity of the carriage travel, and d. spring means attached to said moveable carriage and a stationary support structure to normally bias said carriage away from said first hook.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |