US4212437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cassette
Assignee: TDK Corp
•
Filing: 1978-08-14
•
Granted: 1980-07-15
•
Expires: 1998-08-14
Abstract
Abstract A tape cassette including an upper half-case and a lower half-case and a tape guide wherein the tape guide is held only on one half-case and the upper and lower half-cases are fixed by screws only from one side of the half-cases through communicating holes except for a hole for the tape guide and wherein one end of a plate spring mounted on the one half-case and the other end or middle part of the plate spring is press-contacted with a lock plate to form a cover locking mechanism.
Inventors
- 👤 Haruo Shiba
- 👤 Masatoshi Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:21
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A tape cassette cover locking mechanism for a tape cassette having a first and second half-case comprising: a cover lockably mounted on said first half-case; a lock plate mounted on said second half-case for engaging said cover; a rib member mounted on said second half-case; and, a plate spring fixedly mounted on said rib, one end of which engages said lock plate.
Claim 2
Dependent Claim
62 words
A tape cassette cover locking mechanism for a tape cassette having a first and second half-case comprising: a cover lockably mounted on said first half-case; a lock plate mounted on said second half-case for engaging said cover; a rib member mounted on said second half-case; and, a plate spring fixedly mounted on said rib, one end of which engages said lock plate.
Claim 3
Dependent Claim
40 words
A tape cassette cover locking mechanism as set forth in claim 1, said one end of said plate spring having a hole formed therein and a projection formed on said lock plate for engaging said hole in said plate spring.
Claim 4
Dependent Claim
43 words
A tape cassette cover locking mechanism as set forth in claim 1, further comprising: screw members passing through apertures formed in only one of said first and second half-cases and engaging corresponding apertures formed in the other of said first and second half-cases.
Claim 5
Dependent Claim
24 words
A tape cassette cover locking mechanism as set forth in claim 1, further comprising: means for securing said plate spring to said rib member.
Claim 6
Dependent Claim
42 words
A tape cassette cover locking mechanism as set forth in claim 3 or 4, said one end of said plate spring having a hole formed therein and a projection formed on said lock plate for engaging said hole in said plate spring.
Claim 7
Dependent Claim
38 words
A tape cassette cover locking mechanism as set forth in claim 1, further comprising: a side wall formed on said second half-case wherein an end portion of said one end of said spring plate engages said side wall.
References Cited (Backward Citations)
US3065922A
Cited
US3710039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |