US3845501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video recording and/or reproducing apparatus having an automatic tape threading mechanism
Assignee: NEC Corp
•
Filing: 1973-01-29
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Granted: 1974-10-29
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Expires: 1993-01-29
Abstract
Abstract Video recording and/or reproducing apparatus in which a magnetic tape is scanned at a slant angle with respect to the tape transportation direction by at least one rotary magnetic head rotated in the vicinity of a clearance gap at a tape guide drum. The magnetic tape contained in the tape cassette or cartridge is automatically threaded and unthreaded about and from the tape guide drum by a moving pinch roller or an idler mounted on a loading arm rotated around the guide drum.
Inventors
- 👤 T Katsuta
- 👤 M Hattori
- 👤 T Suzuki
- 👤 M Inaba
- 👤 M Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:28
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/665; G11B15/6653
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
217 words
Video recording and/or reproducing apparatus in which a magnetic tape is helically scanned by at least one rotary magnetic head, comprising; means for housing said magnetic tape, said housing means having two tape reels disposed substantially side by side; tape guiding means for guiding said magnetic tape along the periphery thereof, said tape guiding means having a clearance gap with respect to the rotating magnetic head for permitting the rotary magnetic head to be rotated in the vicinity thereof, said tape guiding means further having a substantially helical groove disposed on the outer surface thereof; loading arm means including a follower roller disposed for travel within said groove, said loading arm means thereby moving in a substantially helical path around said tape guiding means; said loading arms means extracting said magnetic tape from said tape housing means and threading said magnetic tape about said tape guiding means during the helical movement thereof; driving means for rotating said loading arm means about said tape guiding means to dispose said magnetic tape on said tape guiding means; means for transporting said magnetic tape in a longitudinal direction; and roller means disposed on said loading arm means at a distance radially outward from the surface of said tape guiding means and for engaging said magnetic tape with said transporting means.
Claim 2
Dependent Claim
217 words
Video recording and/or reproducing apparatus in which a magnetic tape is helically scanned by at least one rotary magnetic head, comprising; means for housing said magnetic tape, said housing means having two tape reels disposed substantially side by side; tape guiding means for guiding said magnetic tape along the periphery thereof, said tape guiding means having a clearance gap with respect to the rotating magnetic head for permitting the rotary magnetic head to be rotated in the vicinity thereof, said tape guiding means further having a substantially helical groove disposed on the outer surface thereof; loading arm means including a follower roller disposed for travel within said groove, said loading arm means thereby moving in a substantially helical path around said tape guiding means; said loading arms means extracting said magnetic tape from said tape housing means and threading said magnetic tape about said tape guiding means during the helical movement thereof; driving means for rotating said loading arm means about said tape guiding means to dispose said magnetic tape on said tape guiding means; means for transporting said magnetic tape in a longitudinal direction; and roller means disposed on said loading arm means at a distance radially outward from the surface of said tape guiding means and for engaging said magnetic tape with said transporting means.
Claim 3
Dependent Claim
65 words
A combination as in claim 1, further comprising retractable biased tape positioning means disposed in proximate relation to the path of travel of said roller means on said arm means, cam surface means on said arm means, and follower means for selectively retracting said biased retractable positioning means responsive to said cam surface means to obviate interference between said tape and said tape positioning means.
Claim 4
Dependent Claim
18 words
A combination as in claim 4, wherein said positioning means is canted with respect to said guide means.
Claim 5
Dependent Claim
18 words
A combination as in claim 1, further comprising limit means for selectively deactivating said arm means driving means.
Claim 6
Dependent Claim
33 words
A combination as in claim 1, wherein said guide means is cylindrical in form, and said driving means comprises a gear wheel, and spring means coupling said gear wheel to said arm means.
Claim 7
Dependent Claim
35 words
A combination as in claim 1, further comprising tape driving capstan means, said roller means on said arm means being selectively located contiguous to and in pressure engagement therewith under action of said driving means.
Claim 8
Dependent Claim
16 words
A combination as in claim 1, further comprising rotary magnetic head means for scanning said tape.
Claim 9
Dependent Claim
17 words
A combination as In claim 7, wherein said rotary head means is disposed within said guide means.
References Cited (Backward Citations)
US3681539A
Cited
US3678213A
Cited
US3688059A
Cited
US3740495A
Cited
US3721776A
Cited
US3740492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |