US3706422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cartridge
Assignee: TDK Corp
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Filing: 1970-03-13
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Granted: 1972-12-19
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Expires: 1990-03-13
Abstract
Abstract According to the present invention, a magnetic tape is allowed to run in a normal way and can be taken up on a hub in a convoluted manner, even if the endless cartridge is mounted upside down, on a sound-recording and playback apparatus or such sound-recording and playback apparatus is operated with said apparatus itself being turned upside down. The present invention is featured, among others, by the fact that a rotary member adapted to receive the tape wound up on the hub and to give rotational movement to the wound up tape is provided in the cartridge in opposed relation with a rotary plate serving as a tape receiver means in the endless cartridge.
Inventors
- 👤 Fukuzo Ito
- 👤 Masaoki Sekine
- 👤 Yasusuke Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:58
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
An endless magnetic tape cartridge comprising an outer hub member having said magnetic tape wound thereon in a convoluted manner for removal from the innermost convolution adjacent said outer hub member and rewinding on the outermost of said convolution; an inner rotatable hub member extending axially on at least one side beyond said outer hub member; a first plate member coupled to said inner hub member for rotation therewith and positioned for engagement with one edge of said convolutions of said magnetic tape when said cartridge is positioned in its normal position; a second rotatable plate member mounted in spaced relation to said first plate member a distance such that said convolutions of magnetic tape are out of engagement with said second plate member when said cartridge is in said normal position, but at least a portion of said convolutions are engaged thereto at their other edge when said cartridge is inverted from its normal position; and means for operatively coupling said inner hub member and said second plate member for the coordinate rotation thereof, whereby rotational motion is applied to the woundup tape whether said cartridge is in its normal or inverted position.
Claim 2
Dependent Claim
194 words
An endless magnetic tape cartridge comprising an outer hub member having said magnetic tape wound thereon in a convoluted manner for removal from the innermost convolution adjacent said outer hub member and rewinding on the outermost of said convolution; an inner rotatable hub member extending axially on at least one side beyond said outer hub member; a first plate member coupled to said inner hub member for rotation therewith and positioned for engagement with one edge of said convolutions of said magnetic tape when said cartridge is positioned in its normal position; a second rotatable plate member mounted in spaced relation to said first plate member a distance such that said convolutions of magnetic tape are out of engagement with said second plate member when said cartridge is in said normal position, but at least a portion of said convolutions are engaged thereto at their other edge when said cartridge is inverted from its normal position; and means for operatively coupling said inner hub member and said second plate member for the coordinate rotation thereof, whereby rotational motion is applied to the woundup tape whether said cartridge is in its normal or inverted position.
Claim 3
Dependent Claim
65 words
A cartridge as recited in claim 1, wherein said operative coupling means includes a shaft supporting said further plate member for rotation, said shaft being positioned adjacent the periphery of said first plate member, and means operatively connecting said shaft and the periphery of said first plate member for transmitting the rotation of said first plate member to said shaft and said second plate member.
Claim 4
Dependent Claim
36 words
A cartridge as recited in claim 2, wherein the periphery of said second plate member is formed with gear teeth; and including a spur gear mounted on said shaft in operative engagement with said gear teeth.
Claim 5
Dependent Claim
66 words
A cartridge as recited in claim 1, wherein said inner hub member projects axially on both sides of said outer hub member; said second plate member being mounted for rotatable displacement adjacent the projecting end of said inner hub member opposed to said first plate member, said operative coupling means operatively coupling said last-mentioned projecting end of said inner hub member and said second plate member.
Claim 6
Dependent Claim
31 words
A cartridge as recited in claim 4, wherein said coordinate displacing means comprises mating teeth on the periphery of said second plate member and said projecting end of said hub member.
Claim 7
Dependent Claim
155 words
A cartridge as recited in claim 1, wherein said inner hub member projects axially on both sides of said outer hub member and is formed with a radial flange extending therefrom spaced from said first plate member; said second plate member being formed with a central opening therethrough for receipt of said inner hub member, said second plate member being positioned for free axial displacement relative to said hub member between a first position assumed when said cartridge is in said normal position out of engagement with both said other edge of said convolutions and said hub radial flange, and a second position assumed when said cartridge is in said inverted position in engagement with said hub radial flange at which at least a portion of said other edges of said convolutions engage therewith, said operative coupling means operatively transmitting the drive of said hub to said second plate member at the second position thereof.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |