US3591102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-catching spool for tapelike record carriers
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1969-07-08
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Granted: 1971-07-06
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Expires: 1989-07-08
Abstract
Abstract A spool for tapelike record carriers which automatically grips the record carrier strip as it is inserted between the flanges of the spool.
Inventors
- 👤 Heinz Keiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:19
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/326; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67; G11B15/674; G11B23/00; G11B23/02; G11B23/037
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A self-catching unitary spool for a record carrier strip comprising a hub ring (7) and two spool flanges on the top and bottom of said hub ring, each flange defining an equal number of sectors (1-3 And 4-6) with each sector being positioned opposite vacant spaces between the flange sectors of the opposite flange, and radial slits in the lateral margins of each sector which are cut free at said hub ring from said slit to the outer edge of said sector to define leaflike spring elements (1a, 1b- 6a, 6b) projecting inwardly from said sectors, the outer edges of said spring elements of two flange sectors on opposite sides of the spool being aligned in the same axial direction whereby said spring elements are offset from each other.
Claim 2
Dependent Claim
129 words
A self-catching unitary spool for a record carrier strip comprising a hub ring (7) and two spool flanges on the top and bottom of said hub ring, each flange defining an equal number of sectors (1-3 And 4-6) with each sector being positioned opposite vacant spaces between the flange sectors of the opposite flange, and radial slits in the lateral margins of each sector which are cut free at said hub ring from said slit to the outer edge of said sector to define leaflike spring elements (1a, 1b- 6a, 6b) projecting inwardly from said sectors, the outer edges of said spring elements of two flange sectors on opposite sides of the spool being aligned in the same axial direction whereby said spring elements are offset from each other.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |