US4607299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape cassette including erasure prevention means, and cassette operating device for same
Assignee: Fujifilm Holdings Corp
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Filing: 1983-11-21
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Granted: 1986-08-19
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Expires: 2003-11-21
Abstract
Abstract A magnetic tape cassette system includes an erroneous erasing preventing member which is controlled by an operating device on a cassette deck to prevent erroneous erasing of a tape cassette. The erroneous erasing preventing member includes a space with an opening provided on a peripheral wall of a tape cassette, and an opening and closing member which in a first position prevents erasing of the tape cassette and in a second position closes the opening to the space, thereby allowing the tape cassette to be erased.
Inventors
- 👤 Kengo Oishi
- 👤 Osamu Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:35
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/041; G11B23/042; G11B15/00; G11B15/02; G11B15/05; G11B15/06; G11B15/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A magnetic tape cassette system including a cassette and a cassette machine, in which signals recorded on a magnetic tape cassette are prevented from being erased by mistake, said cassette system comprising: a space internal of said cassette and having an opening provided in a peripheral wall of said cassette, and an opening and closing member fitted into said space, wherein said opening is opened when said opening and closing member is in a first position and erasing of said cassette is prevented when said opening and closing member is in said first position, and said opening is closed when said opening and closing member is in a second position and erasing of said cassette is allowed when said opening and closing member is in said second position; and a magnetic tape cassette operating device which is operable upon ejection of said cassette from said machine for engaging said opening and closing member to move said member from said second position to said first position.
Claim 2
Dependent Claim
165 words
A magnetic tape cassette system including a cassette and a cassette machine, in which signals recorded on a magnetic tape cassette are prevented from being erased by mistake, said cassette system comprising: a space internal of said cassette and having an opening provided in a peripheral wall of said cassette, and an opening and closing member fitted into said space, wherein said opening is opened when said opening and closing member is in a first position and erasing of said cassette is prevented when said opening and closing member is in said first position, and said opening is closed when said opening and closing member is in a second position and erasing of said cassette is allowed when said opening and closing member is in said second position; and a magnetic tape cassette operating device which is operable upon ejection of said cassette from said machine for engaging said opening and closing member to move said member from said second position to said first position.
Claim 3
Dependent Claim
21 words
A magnetic tape cassette system, as claimed in claim 1, wherein said opening and closing member is made of polyacetal resin.
Claim 4
Dependent Claim
116 words
A magnetic tape cassette system, as claimed in claim 1, wherein said operating device comprises: a substantially F-shaped release lever having a hole cut in one end, and having an engaging part which engages said member at the other end, said release lever being supported by a pin attached to said magnetic tape cassette system which is loosely fitted in said hole cut in said release lever; and a roller adapted to abut against the peripheral wall of said cassette while said cassette is being ejected and adapted to leave said peripheral wall when said member moves to said first position, wherein said release lever disengages from said member when said roller leaves said peripheral wall.
Claim 5
Dependent Claim
20 words
A magnetic tape cassette system, as claimed in claim 1, wherein said opening and closing member is made of polyurethane.
Claim 6
Dependent Claim
20 words
A magnetic tape cassette system, as claimed in claim 1, wherein said opening and closing member is made of ABS.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |