US3744736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording and/or playback device having tape-type record carriers which are wound on a reel
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1971-06-28
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Granted: 1973-07-10
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Expires: 1991-06-28
Abstract
Abstract A system including a tape reel containing a length of tape whose leading end can be fed out of the reel by rotation of the reel and a recording and/or playback instrument for guiding the leading end onto a takeup reel, the tape having a stiff, resilient leader tape arranged to bear against peripheral surfaces of the reel flange, the surfaces being inset radially from the outer flange extremity, and at least part of the leader tape having a normal curvature such that it presses against the peripheral surfaces.
Inventors
- 👤 J Kruhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
In a reel composed of two facing reel flanges and on which a tape-type record carrier is wound, the trailing end of the carrier being fastened to the reel and its leading end being provided with a stiff, flexible leader tape which is wider than said record carrier and can be wound on peripheral edges of the reel flanges and can be pushed by a takeup force acting in the unwinding direction along a guide path in the direction toward a takeup device, the improvement wherein the peripheral edges against which the leader tape bears are formed as an annular stage, or step, disposed on the inside surface of each respective reel flange, said peripheral edges and the inside surface of their respective reel flanges define a free space which extends from said peripheral edges to the outer edges of the respective reel flanges, and the leader tape comprises a resilient material and is, except for a short leading portion, of such a length and provided with such a curvature that it encloses, and presses against, the peripheral edges under its own tension.
Claim 2
Dependent Claim
183 words
In a reel composed of two facing reel flanges and on which a tape-type record carrier is wound, the trailing end of the carrier being fastened to the reel and its leading end being provided with a stiff, flexible leader tape which is wider than said record carrier and can be wound on peripheral edges of the reel flanges and can be pushed by a takeup force acting in the unwinding direction along a guide path in the direction toward a takeup device, the improvement wherein the peripheral edges against which the leader tape bears are formed as an annular stage, or step, disposed on the inside surface of each respective reel flange, said peripheral edges and the inside surface of their respective reel flanges define a free space which extends from said peripheral edges to the outer edges of the respective reel flanges, and the leader tape comprises a resilient material and is, except for a short leading portion, of such a length and provided with such a curvature that it encloses, and presses against, the peripheral edges under its own tension.
Claim 3
Dependent Claim
28 words
An arrangement as defined in claim 1 wherein said reel is closed off by said leader tape to serve directly as a supply container for said record carrier.
Claim 4
Dependent Claim
54 words
An arrangement as defined in claim 1 in combination with, and mounted on, a recording and/or playback instrument employing such record carrier and comprising a friction wheel urged, during the start of tape feed, against said leader tape and rotated for driving said leader tape in a direction which unwinds it from said reel.
Claim 5
Dependent Claim
94 words
An arrangement as defined in claim 1 in combination with a recording and/or playback instrument employing such record carrier and comprising: means for engaging said reel to rotate it about its axis; means connected to said engaging means for rotating said reel in the tape unwinding direction when said leader tape is wound on said reel; and means on the surface of said peripheral flange edges for applying to said leader tape a driving force effective to move said tape leader in the tape unwinding direction when said reel is rotated in such direction.
Claim 6
Dependent Claim
71 words
An arrangement as defined in claim 1 wherein the rear edge of said leader tape adjacent said carrier extends substantially normally to the length of said leader tape, and said peripheral flange edges against which said leader tape bears are provided with a series of circumferentially spaced transverse recesses against which the rear edge of said leader tape engages during the starting phase of the feeding of tape from said reel.
Claim 7
Dependent Claim
57 words
An arrangement as defined in claim 4 wherein said instrument further comprises: means defining a guide surface surrounding, and concentric with, said reel; and means defining a guide path forming a continuation of said guide surface and arranged to guide said tape leader away from said reel when said reel is rotated in the tape unwinding direction.
Claim 8
Dependent Claim
36 words
An arrangement as defined in claim 4 wherein said instrument further comprises at least one pressure element mounted for urging said leader tape against said peripheral flange edges at least during the start of tape feeding.
Claim 9
Dependent Claim
22 words
An arrangement as defined in claim 7, further comprising a coating having a high coefficient of friction on said peripheral flange edges.
Claim 10
Dependent Claim
30 words
An arrangement as defined in claim 8, further comprising a coating having a high coefficient of friction disposed on said leader tape on a central region between its lateral edges.
Claim 11
Dependent Claim
22 words
An arrangement as defined in claim 7 wherein said leader tape is provided with transverse grooves on both of its wide surfaces.
Claim 12
Dependent Claim
41 words
An arrangement as defined in claim 10 wherein said peripheral flange edges against which said leader tape bears are provided with transverse recesses which cooperate with the transverse grooves of the turn of said leader tape contacting said peripheral flange edges.
Claim 13
Dependent Claim
56 words
An arrangement as defined in claim 4 wherein said instrument further comprises: a roller disposed adjacent said guide path; a counter roller; means for selectively moving said counter roller against said roller; and means for rotating said roller and counter roller in a direction to grip the leader tape and feed it toward a takeup device.
Claim 14
Dependent Claim
66 words
An arrangement as defined in claim 4 wherein said instrument further includes a takeup device comprising, in combination: a takeup core; at least one guide bar shaped to conform to the peripheral surface of said takeup core; and means supporting said bar for movement into a position in which said bar is closely adjacent such peripheral surface and guides the leader tape against such peripheral surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |