Patent US3593935A successfully refreshed from Google Patents.
US3593935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless loop tape cartridge
Assignee: Individual
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Filing: 1967-11-20
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Granted: 1971-07-20
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Expires: 1987-11-20
Abstract
Abstract A magnetic tape cartridge houses an endless coiled tape with an exterior loop of tape extending from the inside convolution of the coil, past suitable guide means, over tape head pads and a pressure member disposed adjacent to openings in the front of the cartridge, to then return to the outer convolution of the coil. The coil is supported on a spool composed of a resilient washer or flange snapped over a series of annular projections on the lower portion of a concentric hub. A resilient plastic pressure means is pivotally mounted inside the cartridge and in one embodiment carries a pressure roller to engage and press the tape loop against a driven capstan to feed the tape. An alternate embodiment uses a reversely curved compression arm to press the tape against the capstan. When the cartridge is removed from the capstan the pressure roller or compression arm is arranged so as to press the tape against the edges of the adjacent cartridge opening.
Inventors
- 👤 Theodore Ritz Jr
- 👤 Joseph M Richtarcik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
A cartridge for an endless loop tape comprising a housing having a base, a shaft on the base, a hub rotatably mounted on the shaft, said hub having an integral bearing portion bearing against said shaft by which said hub stands upon said base, a resilient film washer for supporting a tape coil carried by and supported on the hub and capable of independent rotation in respect to said hub, said hub having therearound an annular seat, said film washer rotatably disposed in said annular seat, and lateral projecting means around the annular seat for securing the film washer on the hub.
Claim 2
Dependent Claim
102 words
A cartridge for an endless loop tape comprising a housing having a base, a shaft on the base, a hub rotatably mounted on the shaft, said hub having an integral bearing portion bearing against said shaft by which said hub stands upon said base, a resilient film washer for supporting a tape coil carried by and supported on the hub and capable of independent rotation in respect to said hub, said hub having therearound an annular seat, said film washer rotatably disposed in said annular seat, and lateral projecting means around the annular seat for securing the film washer on the hub.
Claim 3
Dependent Claim
30 words
The cartridge of claim 1 in which said film washer is assembled on the hub by being snapped over said lateral projecting means to dispose it in said annular seat.
Claim 4
Dependent Claim
30 words
The cartridge of claim 1 and said housing having a cover, a circular rib on the cover projecting inside the hub to prevent the tape from migrating inside the hub.
Claim 5
Dependent Claim
65 words
The cartridge of claim 3 and rib structure on the cover disposed radially outwardly of said first-mentioned circular rib and projecting toward the film washer to maintain the tape coil in an organized condition on the film washer, said rib structure including an outer circular rib which is disposed radially outwardly of the tape coil, said outer circular rib concentric to said first-mentioned circular rib.
Claim 6
Dependent Claim
39 words
The cartridge of claim 4, said rib structure further comprising a third concentric circular rib radially intermediate said first-mentioned and said outer circular ribs, said intermediate circular rib disposed above the tape coil and radially outwardly of said hub.
Claim 7
Dependent Claim
41 words
The cartridge of claim 1, said housing having a capstan opening therein, resilient means supported on the base and means biased thereby against said opening, the tape movable over said means biased against said opening and braked thereby against said opening.
Claim 8
Dependent Claim
118 words
A cartridge having an endless loop tape comprising a housing having a base and a cover, said housing having a capstan opening therein, said capstan opening having opposite edges, said base having an upright pivot post integral therewith, brake means including resilient plastic means pivotally supported on said base via said pivot post, said resilient means being slidable in respect to said pivot post, said brake means also including means biased by said plastic means against both said edges of said opening, said brake means being confined wholly between the inside surfaces of said cover and base, said tape being movable over and braked against both said edges of said opening by said means biased against said opening.
Claim 9
Dependent Claim
118 words
A cartridge having an endless loop tape comprising a housing having a base and a cover, said housing having a capstan opening therein, said capstan opening having opposite edges, said base having an upright pivot post integral therewith, brake means including resilient plastic means pivotally supported on said base via said pivot post, said resilient means being slidable in respect to said pivot post, said brake means also including means biased by said plastic means against both said edges of said opening, said brake means being confined wholly between the inside surfaces of said cover and base, said tape being movable over and braked against both said edges of said opening by said means biased against said opening.
Claim 10
Dependent Claim
78 words
In a cartridge for an endless loop tape, a hub having an integral bearing portion for bearing against a shaft, a resilient film washer for supporting a tape coil carried by and supported on the hub and capable of independent rotation in respect to said hub, said hub having therearound an annular seat, said film washer rotatably disposed in said annular seat, and laterally projecting means around the annular seat for securing the film washer on the hub.
Claim 11
Dependent Claim
78 words
In a cartridge for an endless loop tape, a hub having an integral bearing portion for bearing against a shaft, a resilient film washer for supporting a tape coil carried by and supported on the hub and capable of independent rotation in respect to said hub, said hub having therearound an annular seat, said film washer rotatably disposed in said annular seat, and laterally projecting means around the annular seat for securing the film washer on the hub.
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |