US3801035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tape cassette
Assignee: Individual
•
Filing: 1970-08-24
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Granted: 1974-04-02
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Expires: 1990-08-24
Abstract
Abstract A flat box-shaped cassette having front wall apertures cooperating with the drive capstan and recording and reproducing heads of a conventional recording and playback machine supports an endless tape retained in a genrrally rectangular coil by four flangeless spools so that tape can pass from the inner coil convolution via suitable guides and recording and playback heads to return as the outer coil convolution.
Inventors
- 👤 W Heylands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:41
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
343 words
A cassette having the shape of a flat box containing a tape for recording and playback of magnetic recordings comprising a bottom, a cover and side walls, a plurality of openings arranged in the bottom and in the cover, said openings aligned in pairs for receiving winding spindles and a driving shaft of a recording apparatus, a plurality of openings formed in one of the longer side walls past which the tape is conveyed and through which magnetic heads and a pressure roller of said recording apparatus can be passed for contact with the tape, a pair of guide rollers arranged at two of the corners within the cassette adjacent said side wall having the plurality of openings for guiding said tape along said side wall, four flangeless supporting rollers rotatably mounted within said cassette between said cover and said bottom, said rollers being mounted on studs secured in the bottom of the cassette for free rotational movement, said recording tape being wound about said four flangeless supporting rollers so as to form an endless coil in the shape of an elongate rectangle, the longer and shorter sides of said rectangularly shaped endless coil of tape being parallel to the longer and shorter sides respectively of the cassette, said tape being unwound from the interior of said rectangularly shaped endless coil in a diagonal path from one of said supporting rollers to one of said guide rollers, said tape being passed along said side wall having the plurality of openings between said guide rollers and thence is returned to the outer circumference of said endless coil, and guide rib means projecting vertically from the bOttom of said cassette for guiding said tape in a horizontally oriented path so that the tape is twisted through 90* during its travel along said diagonal path so as to move past the windings of said coil in the twisted condition and is untwisted to return to a substantially vertical orientation with respect to the bottom of the cassette upon contact with said one of said guide rollers.
Claim 2
Dependent Claim
343 words
A cassette having the shape of a flat box containing a tape for recording and playback of magnetic recordings comprising a bottom, a cover and side walls, a plurality of openings arranged in the bottom and in the cover, said openings aligned in pairs for receiving winding spindles and a driving shaft of a recording apparatus, a plurality of openings formed in one of the longer side walls past which the tape is conveyed and through which magnetic heads and a pressure roller of said recording apparatus can be passed for contact with the tape, a pair of guide rollers arranged at two of the corners within the cassette adjacent said side wall having the plurality of openings for guiding said tape along said side wall, four flangeless supporting rollers rotatably mounted within said cassette between said cover and said bottom, said rollers being mounted on studs secured in the bottom of the cassette for free rotational movement, said recording tape being wound about said four flangeless supporting rollers so as to form an endless coil in the shape of an elongate rectangle, the longer and shorter sides of said rectangularly shaped endless coil of tape being parallel to the longer and shorter sides respectively of the cassette, said tape being unwound from the interior of said rectangularly shaped endless coil in a diagonal path from one of said supporting rollers to one of said guide rollers, said tape being passed along said side wall having the plurality of openings between said guide rollers and thence is returned to the outer circumference of said endless coil, and guide rib means projecting vertically from the bOttom of said cassette for guiding said tape in a horizontally oriented path so that the tape is twisted through 90* during its travel along said diagonal path so as to move past the windings of said coil in the twisted condition and is untwisted to return to a substantially vertical orientation with respect to the bottom of the cassette upon contact with said one of said guide rollers.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |