US3800318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical tape guide
Assignee: INT VIDEO CORP
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Filing: 1972-10-26
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Granted: 1974-03-26
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Expires: 1992-10-26
Abstract
Abstract A helical tape guide around a stationary drum encasing a rotating scanner assembly, the tape guide has a plurality of curved plates arranged around and displaced from the drum and a series of spatially positioned pins projecting from the plates into corresponding holes in the drum, the pins being arranged in a helical path around the drum forming a guide path for the lead end of a tape leader threaded around the drum by a tape mechanism.
Inventors
- 👤 J Jantzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:20
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/61
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
In a tape recorder device having a helical scanner unit with a stationary drum and an inner scanner rotor, a tape guide for threading a magnetic tape having a relatively stiff leader around said drum without said guide substantially distorting the symmetry of the drum, the tape guide comprising: at least one surface means arranged in substantial part around the stationary drum and displaced therefrom; a plurality of pins attached to and projecting from said surface means, said pins being arranged in a helical pattern around the outer surface of said drum and directed into the surface of said drum, wherein said drum is adapted to receive said pins without contact between said drum and said pins.
Claim 2
Dependent Claim
117 words
In a tape recorder device having a helical scanner unit with a stationary drum and an inner scanner rotor, a tape guide for threading a magnetic tape having a relatively stiff leader around said drum without said guide substantially distorting the symmetry of the drum, the tape guide comprising: at least one surface means arranged in substantial part around the stationary drum and displaced therefrom; a plurality of pins attached to and projecting from said surface means, said pins being arranged in a helical pattern around the outer surface of said drum and directed into the surface of said drum, wherein said drum is adapted to receive said pins without contact between said drum and said pins.
Claim 3
Dependent Claim
157 words
In a tape recorder device having a helical scanner unit with a stationary drum and an inner scanner rotor, a tape guide for threading a magnetic tape having a relatively stiff leader around said drum without said guide substantially distorting the symmetry of the drum, the tape guide comprising: a support structure arranged adjacent the stationary drum, a plurality of plates attached to said support structure, the plates having concave surfaces which conform to and are displaced from an outer surface of said drum, a plurality of guide pins attached to and projecting from the concave surface of the plates directed into the outer surface of said drum and arranged in a helical pattern around said drum, wherein said drum is adapted to receive said pins by inclusion of holes in the surface of said drum of diameter greater than said pins, which holes are arranged in corresponding concentric relationship with said pins without contacting said pins.
Claim 4
Dependent Claim
157 words
In a tape recorder device having a helical scanner unit with a stationary drum and an inner scanner rotor, a tape guide for threading a magnetic tape having a relatively stiff leader around said drum without said guide substantially distorting the symmetry of the drum, the tape guide comprising: a support structure arranged adjacent the stationary drum, a plurality of plates attached to said support structure, the plates having concave surfaces which conform to and are displaced from an outer surface of said drum, a plurality of guide pins attached to and projecting from the concave surface of the plates directed into the outer surface of said drum and arranged in a helical pattern around said drum, wherein said drum is adapted to receive said pins by inclusion of holes in the surface of said drum of diameter greater than said pins, which holes are arranged in corresponding concentric relationship with said pins without contacting said pins.
Claim 5
Dependent Claim
36 words
The apparatus of claim 1 in combination with tape drive means adapted to drive a rounded lead end of a relatively stiff leader into said tape guide and around the drum of the helical scanner unit.
References Cited (Backward Citations)
US3150840A
Cited
US3123272A
Cited
US3354269A
Cited
US3375331A
Cited
US3598926A
Cited
US3661311A
Cited
US3691315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |