Patent US3818503A successfully refreshed from Google Patents.
US3818503A
Expired / Lapsed
US
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Rotary head type magnetic recording and reproducing apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1972-11-30
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Granted: 1974-06-18
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Expires: 1992-11-30
Abstract
Abstract A rotary head type magnetic recording and reproducing apparatus, in which a magnetic tape paid out from a supply reel is trailed around a guide drum having a plurality of rotary heads therein, over a predetermined central angle of said guide drum in such a manner that said magnetic tape may be positioned on a continuous line made up of a curved line having its center on the magnetic coating side of said magnetic tape, and straight lines, and is led to a winding reel in such a manner that the tape leading to the guide drum and the tape leaving said guide drum cross each other at a point remote from said guide drum, whereby travel of the tape is stabilized.
Inventors
- 👤 H Hosono
- 👤 M Nagahiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:03
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B5/00; G11B5/48; G11B5/52; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A rotary head type magnetic recording and reproducing apparatus, characterized in that a magnetic tape paid out from a supply reel is trailed around a guide drum having a plurality of rotary heads therein, over a predetermined central angle of said guide drum in such a manner that said magnetic tape may be positioned on a continuous line made up of a curved line having its center on the magnetic coating side of said magnetic tape, and straight lines, and is led to a winding reel in such a manner that the tape leading to the guide drum and the tape leaving said guide drum cross each other at a point remote from said guide drum, and further guide pins, an erasing head and an audio control head are arranged within the shape defined by a portion of the peripheral surface of said guide drum and the lengths of tape between said guide drum and said tape crossing point, for contact with the magnetic coating of the magnetic tape.
Claim 2
Dependent Claim
169 words
A rotary head type magnetic recording and reproducing apparatus, characterized in that a magnetic tape paid out from a supply reel is trailed around a guide drum having a plurality of rotary heads therein, over a predetermined central angle of said guide drum in such a manner that said magnetic tape may be positioned on a continuous line made up of a curved line having its center on the magnetic coating side of said magnetic tape, and straight lines, and is led to a winding reel in such a manner that the tape leading to the guide drum and the tape leaving said guide drum cross each other at a point remote from said guide drum, and further guide pins, an erasing head and an audio control head are arranged within the shape defined by a portion of the peripheral surface of said guide drum and the lengths of tape between said guide drum and said tape crossing point, for contact with the magnetic coating of the magnetic tape.
Claim 3
Dependent Claim
101 words
A rotary head type magnetic recording and reproducing apparatus according to claim 1, wherein said magnetic tape has connected to its leading end a leader tape which is larger in width and greater in rigidity than said magnetic tape, and a strip-like leader tape guide having on one side a longitudinal opening of a width larger than the width of said magnetic tape is arranged adjacent the travelling path of said magnetic tape, with its longitudinal opening facing said travelling path of tape, in such a manner that it extends continuously from a point adjacent the supply reel to the capstan.
Claim 4
Dependent Claim
58 words
A rotary head type magnetic recording and reproducing apparatus according to claim 1, wherein said guide drum is inclined relative to the flange surface of said supply reel and said magnetic tape crossing point is located adjacent an extension of the guide drum diameter extending in the same direction as the direction of inclination of said guide drum.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |