US4382522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cover of magnetic tape cassette and process for preparing tape cover
Assignee: TDK Corp
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Filing: 1980-10-29
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Granted: 1983-05-10
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Expires: 2000-10-29
Abstract
Abstract A tape cover made of resin comprises a single-piece L-shaped body of an upper plate and a front plate and an erroneous insertion detecting notch formed in the joint of the plates, wherein a gate is formed in the notch and the thickness of the wall of a portion adjacent the notch in the upper plate is smaller than the distance from the edge of the upper plate to the most remote part of the diameter of the gate.
Inventors
- 👤 Seiki Shimazu
- 👤 Masaoki Sekine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:35
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/0025; B29C45/0046; G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08735
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
A cover for a magnetic tape cassette, comprising: an L-shaped molded body formed of a resinous material, said body including a front plate and an upper plate having a joint therebetween; an erroneous insertion detection notch formed in said body at a first front plate surface and a second upper plate surface of said joint; and a sprue formed on a third surface of said body in said notch, said sprue comprising resinous material from an outlet of a mold, at least a portion of said sprue being spaced from said second surface by a first distance, wherein the thickness of said upper plate adjacent said notch comprises a first thickness, said first thickness being less than said first distance.
Claim 2
Dependent Claim
120 words
A cover for a magnetic tape cassette, comprising: an L-shaped molded body formed of a resinous material, said body including a front plate and an upper plate having a joint therebetween; an erroneous insertion detection notch formed in said body at a first front plate surface and a second upper plate surface of said joint; and a sprue formed on a third surface of said body in said notch, said sprue comprising resinous material from an outlet of a mold, at least a portion of said sprue being spaced from said second surface by a first distance, wherein the thickness of said upper plate adjacent said notch comprises a first thickness, said first thickness being less than said first distance.
Claim 3
Dependent Claim
25 words
The cover according to claim 1 wherein said upper plate is provided with a groove to form a reduced wall portion of said first thickness.
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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |