US3703612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single take-up reel, automatic threading, magnetic tape duplicating apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1970-03-16
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Granted: 1972-11-21
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Expires: 1990-03-16
Abstract
Abstract A magnetic tape duplicating apparatus of the type in which a recorded master tape and an unrecorded slave tape are taken up on a take-up reel with the magnetic coatings of the respective tapes in intimate contact with each other and a transfer bias magnetic field is impressed on both tapes on the take-up reel thereby to transfer a signal on the recorded master tape onto the unrecorded slave tape, wherein a device is provided for automatically engaging the master tape and the slave tape around the take-up reel at the outset of the tape winding operation, so as to enhance the efficiency of the tape duplicating operation.
Inventors
- 👤 Yutaka Higashida
- 👤 Kaoru Imanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:36
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86; G11B5/865
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
246 words
A magnetic tape duplicating apparatus comprising: first and second tape supply reels for supplying a recorded master tape and an unrecorded slave tape, respectively; a take-up reel on which said master and slave tapes are wound together, said take-up reel having means for securing to said take-up reel the leading end of the one of said master and slave tapes which is fed to said take-up reel first; means for driving said take-up reel in a tape winding operation, including a rotary member biased into operative engagement with said take-up reel, wherein said master and slave tapes are trained at least partially around said rotary member between said supply reels and said take-up reel; guide means for guiding said tapes at least partially around said rotary member to a point of operative engagement of said rotary member and said take-up reel, wherein tHe leading end of the one of said master and slave tapes is guided first and then the leading end of the other tape is guided to said point of operative engagement thereby to render the leading end of said the other tape to be pinched between said one tape on said take-up reel and said one tape on said rotary member; and means, including a transfer field generator mounted adjacent said take-up reel, for applying a transfer magnetic field to the portion of said tapes wound on said take-up reel to impress the signal recorded on said master tape onto said slave tape.
Claim 2
Dependent Claim
246 words
A magnetic tape duplicating apparatus comprising: first and second tape supply reels for supplying a recorded master tape and an unrecorded slave tape, respectively; a take-up reel on which said master and slave tapes are wound together, said take-up reel having means for securing to said take-up reel the leading end of the one of said master and slave tapes which is fed to said take-up reel first; means for driving said take-up reel in a tape winding operation, including a rotary member biased into operative engagement with said take-up reel, wherein said master and slave tapes are trained at least partially around said rotary member between said supply reels and said take-up reel; guide means for guiding said tapes at least partially around said rotary member to a point of operative engagement of said rotary member and said take-up reel, wherein tHe leading end of the one of said master and slave tapes is guided first and then the leading end of the other tape is guided to said point of operative engagement thereby to render the leading end of said the other tape to be pinched between said one tape on said take-up reel and said one tape on said rotary member; and means, including a transfer field generator mounted adjacent said take-up reel, for applying a transfer magnetic field to the portion of said tapes wound on said take-up reel to impress the signal recorded on said master tape onto said slave tape.
Claim 3
Dependent Claim
246 words
A magnetic tape duplicating apparatus comprising: first and second tape supply reels for supplying a recorded master tape and an unrecorded slave tape, respectively; a take-up reel on which said master and slave tapes are wound together, said take-up reel having means for securing to said take-up reel the leading end of the one of said master and slave tapes which is fed to said take-up reel first; means for driving said take-up reel in a tape winding operation, including a rotary member biased into operative engagement with said take-up reel, wherein said master and slave tapes are trained at least partially around said rotary member between said supply reels and said take-up reel; guide means for guiding said tapes at least partially around said rotary member to a point of operative engagement of said rotary member and said take-up reel, wherein tHe leading end of the one of said master and slave tapes is guided first and then the leading end of the other tape is guided to said point of operative engagement thereby to render the leading end of said the other tape to be pinched between said one tape on said take-up reel and said one tape on said rotary member; and means, including a transfer field generator mounted adjacent said take-up reel, for applying a transfer magnetic field to the portion of said tapes wound on said take-up reel to impress the signal recorded on said master tape onto said slave tape.
Claim 4
Dependent Claim
246 words
A magnetic tape duplicating apparatus comprising: first and second tape supply reels for supplying a recorded master tape and an unrecorded slave tape, respectively; a take-up reel on which said master and slave tapes are wound together, said take-up reel having means for securing to said take-up reel the leading end of the one of said master and slave tapes which is fed to said take-up reel first; means for driving said take-up reel in a tape winding operation, including a rotary member biased into operative engagement with said take-up reel, wherein said master and slave tapes are trained at least partially around said rotary member between said supply reels and said take-up reel; guide means for guiding said tapes at least partially around said rotary member to a point of operative engagement of said rotary member and said take-up reel, wherein tHe leading end of the one of said master and slave tapes is guided first and then the leading end of the other tape is guided to said point of operative engagement thereby to render the leading end of said the other tape to be pinched between said one tape on said take-up reel and said one tape on said rotary member; and means, including a transfer field generator mounted adjacent said take-up reel, for applying a transfer magnetic field to the portion of said tapes wound on said take-up reel to impress the signal recorded on said master tape onto said slave tape.
Claim 5
Dependent Claim
80 words
A magnetic tape duplicating apparatus as defined in claim 1, wherein said take-up reel comprises a hub portion and wherein said means for securing the leading end of said one of said tapes to said take-up reel comprises a plurality of substantially radial air passages extending inwardly from the peripheral surface of said hub and a pump communicating with said passages, wherein, by the operation of said pump, a partial vacuum is created at said peripheral surface adjacent said passages.
Claim 6
Dependent Claim
58 words
A magnetic tape duplicating apparatus as defined in claim 1, wherein said take-up reel comprises a hub portion and wherein said means for securing the leading end of said one of said tapes to said take-up reel comprises a tacky layer provided on the peripheral surface of said hub, said tacky layer being substantially non-transferable to said tapes.
Claim 7
Dependent Claim
101 words
A magnetic tape duplicating apparatus as defined in claim 1, wherein said rotary element has an annular groove formed in the peripheral surface thereof to restrict a widthwise displacement of the tape by the upper and lower edges of said groove and the inside surface of said groove is coated with a layer of rubber or synthetic resin, and further comprising means for forwarding and guiding the leading end of the first fed tape, including a guiding member comprising a block fitted to the contour of said groove and located adjacent to but spaced from said groove of said rotary member.
Claim 8
Dependent Claim
48 words
A magnetic tape duplicating apparatus as defined in claim 1, wherein an endless belt is provided in pressure engagement with the rotary member for forwarding and guiding the leading end of the first fed tape to the point of engagement between said rotary member and the take-up reel.
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |