Patent US4227622A successfully refreshed from Google Patents.
US4227622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cassette
Assignee: TDK Corp
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Filing: 1979-05-23
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Granted: 1980-10-14
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Expires: 1999-05-23
Abstract
Abstract A tape cassette comprises an upper half casing and a lower half casing and male hollow cylindrical projections having a notch mounted on either of the upper half casing or the lower half casing and female hollow recesses mounted on the other half casing at the corresponding positions. The upper and lower half casings are superposed to fit the male hollow cylindrical projects into the corresponding female hollow recesses and are fixed together by screwing self-tap bolts from the female hollow recesses into the male hollow cylindrical projections having notches to fix the projections on the inner surfaces of the female hollow recesses.
Inventors
- 👤 Masatoshi Okamura
- 👤 Haruo Shiba
- 👤 Kimio Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:29
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
In a tape cassette comprising an upper half casing and a lower half casing which are assembled with bolts, an improvement characterized in that longitudinally slotted male hollow cylindrical projections are mounted on either of the upper half casing or the lower half casing and female hollow recesses are mounted on the other half casing at the corresponding positions and the upper and lower half casings are superposed to fit the male hollow cylindrical projections into the corresponding female hollow recesses, and self-tap bolts are screwed from the female hollow recesses into the slotted male hollow cylindrical projections to radially expand the male hollow cylindrical projections to fit the projections on the inner surfaces of the female hollow recesses, radial expansion of the male hollow cylindrical projections being facilitated by being slotted.
Claim 2
Dependent Claim
132 words
In a tape cassette comprising an upper half casing and a lower half casing which are assembled with bolts, an improvement characterized in that longitudinally slotted male hollow cylindrical projections are mounted on either of the upper half casing or the lower half casing and female hollow recesses are mounted on the other half casing at the corresponding positions and the upper and lower half casings are superposed to fit the male hollow cylindrical projections into the corresponding female hollow recesses, and self-tap bolts are screwed from the female hollow recesses into the slotted male hollow cylindrical projections to radially expand the male hollow cylindrical projections to fit the projections on the inner surfaces of the female hollow recesses, radial expansion of the male hollow cylindrical projections being facilitated by being slotted.
Claim 3
Dependent Claim
18 words
A tape cassette according to claim 1 wherein the male hollow cylindrical projection has a hollow bottom part.
Claim 4
Dependent Claim
22 words
A tape cassette according to claim 1 wherein the male hollow cylindrical projection has one or more slots in the axial direction.
Claim 5
Dependent Claim
28 words
A tape cassette according to claim 1 wherein the male hollow cylindrical projection is formed in one piece with the half casing by a molding or a casting.
Claim 6
Dependent Claim
31 words
A tape cassette according to claim 1 wherein the female hollow recess has a hole for inserting the self-tap bolt and a wider hollow for receiving the male hollow cylindrical projection.
Claim 7
Dependent Claim
27 words
A tape cassette according to claim 1 wherein the female hollow recess is formed in one piece with the half casing by a molding or a casting.
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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |