Patent US3642228A successfully refreshed from Google Patents.
US3642228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape cassette
Assignee: Memorex Corp
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Filing: 1970-09-21
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Granted: 1972-02-15
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Expires: 1990-09-21
Abstract
Abstract Top and bottom halves to be mated together to form a standardized magnetic cassette are provided. The design of each half facilitates the practice of a method of inserting tape into the cassette during manufacture. The structure of the bottom half has no obstructions between the tape path and the front edge of the cassette half.
Inventors
- 👤 Arthur W Tollkuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:34
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/113; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08785
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
In a recording tape cassette having top and bottom portions defining an enclosure with a wall having apertures along the front edge thereof, a pair of rotatable hubs supported within the enclosure and a tape guide path extending between said hubs adjacent said apertures, the improvement comprising: a substantially planar cartridge bottom portion having a pair of hub supports and means for guiding the tape therebetween along said guide path, the area of said cartridge bottom portion between said guide path and the front edge of said bottom portion being unobstructed, and a substantially planar cartridge top portion, adapted for engagement with said bottom portion and having a pair of hub supports and said apertured wall along the front edge thereof.
Claim 2
Dependent Claim
121 words
In a recording tape cassette having top and bottom portions defining an enclosure with a wall having apertures along the front edge thereof, a pair of rotatable hubs supported within the enclosure and a tape guide path extending between said hubs adjacent said apertures, the improvement comprising: a substantially planar cartridge bottom portion having a pair of hub supports and means for guiding the tape therebetween along said guide path, the area of said cartridge bottom portion between said guide path and the front edge of said bottom portion being unobstructed, and a substantially planar cartridge top portion, adapted for engagement with said bottom portion and having a pair of hub supports and said apertured wall along the front edge thereof.
Claim 3
Dependent Claim
201 words
A recording tape cassette having top and bottom portions defining an enclosure with a wall having apertures along the front edge thereof, a pair of rotatable hubs supported within the enclosure and a tape guide path extending between said hubs adjacent said apertures, said bottom portion comprising: a substantially rectangular planar sheet having longitudinal dimensions exceeding the transverse dimensions, said front edge being along one of said longitudinal dimensions, a pair of centrally located hub supports, sidewalls perpendicular to said planar sheet extending substantially along the transverse dimensions thereof, means for guiding tape along said guide path, the area of said bottom portion between said guide path and said front edge being unobstructed, and said top portion comprising a substantially rectangular planar sheet having longitudinal dimensions exceeding the transverse dimensions said dimensions substantially equal to The dimensions of said bottom portion, said front edge being along one of said longitudinal dimensions, a pair of centrally located hub supports, a wall perpendicular to said planar sheet extending substantially along the other longitudinal dimension of said sheet, and a plurality of perpendicular members along the front edge of said sheet defining said apertures, said members substantially equal to the thickness of the cartridge.
Claim 4
Dependent Claim
201 words
A recording tape cassette having top and bottom portions defining an enclosure with a wall having apertures along the front edge thereof, a pair of rotatable hubs supported within the enclosure and a tape guide path extending between said hubs adjacent said apertures, said bottom portion comprising: a substantially rectangular planar sheet having longitudinal dimensions exceeding the transverse dimensions, said front edge being along one of said longitudinal dimensions, a pair of centrally located hub supports, sidewalls perpendicular to said planar sheet extending substantially along the transverse dimensions thereof, means for guiding tape along said guide path, the area of said bottom portion between said guide path and said front edge being unobstructed, and said top portion comprising a substantially rectangular planar sheet having longitudinal dimensions exceeding the transverse dimensions said dimensions substantially equal to The dimensions of said bottom portion, said front edge being along one of said longitudinal dimensions, a pair of centrally located hub supports, a wall perpendicular to said planar sheet extending substantially along the other longitudinal dimension of said sheet, and a plurality of perpendicular members along the front edge of said sheet defining said apertures, said members substantially equal to the thickness of the cartridge.
Claim 5
Dependent Claim
32 words
The recording tape cartridge of claim 2 wherein said tape guide means comprises a plurality of members perpendicular to the plane of said bottom portion and located adjacent said tape guide path.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |